Reductant delivery system for exhaust gas aftertreatment system

Abstract

The present application relates to a reductant delivery system for exhaust gas aftertreatment systems. A reductant delivery system includes an inlet body, an outlet body, and an outer transfer tube. The inlet body includes an inlet body coupler, an inlet body outer transfer shell, and an inlet body inner shell. The inlet body coupler surrounds an inlet body inlet configured to receive exhaust gas. The inlet body outer transfer shell is coupled to the inlet body coupler. The inlet body outer transfer shell includes an inlet body outer transfer shell inner surface and an inlet body outer transfer shell outlet. The inlet body outer transfer shell outlet extends through the inlet body outer transfer shell inner surface. The inlet body inner shell includes an inlet body inner shell first flange, an inlet body inner shell second flange, and an inlet body inner shell wall. The inlet body inner shell first flange is coupled to the inlet body outer transfer shell inner surface.

Description

[0001] This application is a divisional application of the application filed on December 3, 2019, with application number 201980103533.3 and invention title "Reducing Agent Delivery System for Exhaust Aftertreatment System". Technical Field

[0002] This application generally relates to a reducing agent delivery system for an exhaust aftertreatment system of an internal combustion engine. Background Technology

[0003] For internal combustion engines, such as diesel engines, nitrogen oxides (NOx) X Compounds may be emitted in exhaust gases. For example, it may be desirable to reduce NO. X Emissions must comply with environmental regulations. To reduce NO... X The reducing agent can be distributed into the exhaust gas through a dosing system and within the exhaust aftertreatment system. The reducing agent facilitates the conversion of a portion of the exhaust gas into non-NOx emissions. X Emissions such as nitrogen (N2), carbon dioxide (CO2), and water (H2O) reduce NO. X Emissions. Summary of the Invention

[0004] In one embodiment, the reducing agent delivery system includes an inlet body, an outlet body, and an outer delivery tube. The inlet body includes an inlet body coupler, an inlet body outer delivery shell, and an inlet body inner shell. The inlet body coupler surrounds the inlet body inlet, which is configured to receive exhaust gas. The inlet body outer delivery shell is coupled to the inlet body coupler. The inlet body outer delivery shell includes an inner surface and an outlet. The outlet extends through the inner surface. The inlet body inner shell includes a first flange, a second flange, and a wall. The first flange is coupled to the inner surface. The second flange is coupled to the inner surface. The inner shell wall abuts the first and second flanges and is separated from the inner surface. The outlet body includes an outlet body coupler and an outlet body shell. The outlet body coupler surrounds the outlet body outlet, which is configured to provide exhaust gas. The outlet main shell is coupled to the outlet main shell coupler. The outlet main shell includes the outlet main shell inlet. The outer transfer tube is coupled to the outlet of the inlet main shell outer transfer shell and to the outlet main shell outer transfer shell around the inlet main shell inlet.

[0005] In some embodiments, the reducing agent delivery system further includes: an inner delivery tube positioned within and spaced apart from the outer delivery tube; wherein the inlet body inner shell includes an inlet body inner shell outlet extending through the wall of the inlet body inner shell; and wherein the inner delivery tube is coupled to the inlet body inner shell wall around the inlet body inner shell outlet.

[0006] In some embodiments, the reducing agent delivery system further includes a diverter plate, the diverter plate comprising: a diverter plate coupling surface coupled to the inner shell wall of the inlet body; and a diverter plate panel adjacent to the diverter plate coupling surface.

[0007] In some embodiments, the reducing agent delivery system further includes a deflector comprising: a deflector base coupled to the manifold panel and the inner shell wall of the inlet body; a deflector end abutting the deflector base and coupled to the manifold panel; and more than one deflector end hole disposed in the deflector end; wherein the inner shell of the inlet body further includes an inner shell end cap abutting the inner shell wall of the inlet body; wherein the deflector base is coupled to the inner shell end cap of the inlet body; and wherein the deflector end is coupled to the inner shell end cap of the inlet body.

[0008] In some embodiments, the reducing agent delivery system further includes an inlet body outer mounting shell coupled to the inlet body coupler and the inlet body outer conveying shell. The inlet body outer mounting shell includes: an inner surface of the inlet body outer mounting shell; a diversion surface of the inlet body outer mounting shell adjacent to and extending from the inner surface of the inlet body outer mounting shell toward the inner shell of the inlet body; a protruding surface of the inlet body outer mounting shell adjacent to the diversion surface and the inner surface of the inlet body outer mounting shell; and a spray orifice disposed in the protruding surface of the inlet body outer mounting shell and extending through the inlet body outer mounting shell.

[0009] In some embodiments, the reducing agent delivery system further includes a shield assembly comprising: a shield flange partially coupled to a protruding surface of the inlet body outer mounting housing around the injection orifice; and a shield plate coupled to the shield flange; wherein a shield inlet is defined between the shield flange, the shield plate, and at least one of the inner surface of the inlet body outer mounting housing or the protruding surface of the inlet body outer mounting housing; and wherein a shield outlet is defined between the shield flange and the shield plate, the shield outlet being located above the injection orifice.

[0010] In some embodiments, the reducing agent delivery system further includes: a dispensing module configured to receive a reducing agent; and a spray mounting member coupled to the dispensing module; wherein the inlet body outer mounting shell further includes an inlet body outer mounting shell outer mounting surface opposite to a protruding surface of the inlet body outer mounting shell; wherein the spray hole is disposed in the inlet body outer mounting shell outer mounting surface and extends through the inlet body outer mounting shell outer mounting surface; and wherein the spray mounting member is coupled to the inlet body outer mounting shell outer mounting surface around the spray hole.

[0011] In another embodiment, the reducing agent delivery system includes an inlet body and a jet mount. The inlet body includes an inlet body coupler, an inlet body outer delivery shell, an inlet body inner shell, and an inlet body outer mounting shell. The inlet body coupler surrounds an inlet body inlet configured to receive exhaust gas. The inlet body outer delivery shell is coupled to the inlet body coupler. The inlet body outer delivery shell includes an inner surface and an outlet. The outlet extends through the inner surface of the outer delivery shell. The inlet body inner shell includes a first flange, a second flange, and a wall. The first flange is coupled to the inner surface of the outer delivery shell. The second flange is coupled to the inner surface of the outer delivery shell. The inner shell wall abuts against the first and second flanges and is separated from the inner surface of the outer delivery shell. The inlet body outer mounting shell is coupled to the inlet body coupler and the outer delivery shell. The inlet body outer mounting housing includes an inner surface, a flow-diverting surface, a protruding surface, an outer mounting surface, and injection holes. The flow-diverting surface abuts the inner surface and extends from it toward the inner shell of the inlet body. The protruding surface abuts both the flow-diverting surface and the inner surface. The outer mounting surface faces the protruding surface. Injection holes are located in the protruding and outer mounting surfaces and extend through them. Injection mounts are coupled to the outer mounting surface around the injection holes and configured to couple to the dispensing module.

[0012] In some embodiments, the reducing agent delivery system further includes a diverter plate, the diverter plate comprising: a diverter plate coupling surface coupled to the inner shell wall of the inlet body; and a diverter plate panel adjacent to the diverter plate coupling surface.

[0013] In some embodiments, the reducing agent delivery system further includes a deflector comprising: a deflector base coupled to the manifold panel and the inner shell wall of the inlet body; a deflector end abutting the deflector base and coupled to the manifold panel; and more than one deflector end hole disposed in the deflector end; wherein the inner shell of the inlet body further includes an inner shell end cap abutting the inner shell wall of the inlet body; wherein the deflector base is coupled to the inner shell end cap of the inlet body; and wherein the deflector end is coupled to the inner shell end cap of the inlet body.

[0014] In some embodiments, the reducing agent delivery system further includes a shield assembly comprising: a shield flange partially coupled to a protruding surface of the inlet body outer mounting housing around the injection orifice; and a shield plate coupled to the shield flange; wherein a shield inlet is defined between the shield flange, the shield plate, and at least one of the inner surface of the inlet body outer mounting housing or the protruding surface of the inlet body outer mounting housing; and wherein a shield outlet is defined between the shield flange and the shield plate, the shield outlet being located above the injection orifice.

[0015] In another embodiment, the reducing agent delivery system includes an inlet body, an outlet body, and a jet mount. The inlet body includes an inlet body coupler, an inlet body outer transfer shell, an inlet body outer mounting shell, and an inlet body outer mounting housing. The inlet body coupler surrounds the inlet body inlet, which is configured to receive exhaust gas and is defined by the inlet body inlet center point. The inlet body outer transfer shell is coupled to the inlet body coupler. The inlet body outer transfer shell includes an inner surface and an outlet. The outlet extends through the inner surface of the inlet body outer transfer shell. The inlet body outer mounting shell is coupled to the inlet body coupler and the inlet body outer transfer shell. The inlet body outer mounting shell includes an inner surface and a flow-diverting surface. The flow-diverting surface abuts the inner surface of the inlet body outer mounting shell and extends from the inner surface toward the inlet body inlet center point. A protruding surface of the inlet body outer mounting shell abuts the flow-diverting surface and the inner surface of the inlet body outer mounting shell. The outer mounting surface of the inlet body outer mounting housing faces the protruding surface of the inlet body outer mounting housing. Injection holes are provided in and extend through the protruding surface and the outer mounting surface of the inlet body outer mounting housing. The outlet body includes an outlet body coupler and an outlet body housing. The outlet body coupler surrounds the outlet body outlet, which is configured to provide exhaust. The outlet body housing is coupled to the outlet body coupler. The outlet body housing includes an outlet body housing inlet. An external delivery pipe is coupled to the inlet body external delivery housing outlet around the inlet body external delivery housing outlet and to the outlet body housing around the outlet body housing inlet. The injection mount is coupled to the outer mounting surface of the inlet body outer mounting housing around the injection hole and is configured to couple to the dispensing module.

[0016] In some embodiments, the reducing agent delivery system further includes a shield assembly comprising: a shield flange partially coupled to a protruding surface of the inlet body outer mounting housing around the injection orifice; and a shield plate coupled to the shield flange; wherein a shield inlet is defined between the shield flange, the shield plate, and at least one of the inner surface of the inlet body outer mounting housing or the protruding surface of the inlet body outer mounting housing; and wherein a shield outlet is defined between the shield flange and the shield plate, the shield outlet being located above the injection orifice.

[0017] In some embodiments, the reducing agent delivery system further includes a dispensing module configured to receive reducing agent, the dispensing module being coupled to the injection mount.

[0018] In some embodiments, the inlet body is disposed along the inlet plane of the inlet body; the inlet body, the outlet body, and the outer delivery pipe are divided in two by the bisecting plane of the reducing agent delivery system body, the bisecting plane of the reducing agent delivery system body is orthogonal to the inlet plane of the inlet body, and intersects with the center point of the inlet body; the outer delivery pipe includes: a curved portion of the outer delivery pipe coupled to the outer delivery shell of the inlet body; and a straight portion of the outer delivery pipe adjacent to the curved portion of the outer delivery pipe and coupled to the outlet body shell; the straight portion of the outer delivery pipe is centered on the central axis of the outer delivery pipe; and when measured along the inlet plane of the inlet body, the central axis of the outer delivery pipe is angularly separated from the bisecting plane of the reducing agent delivery system body by 20 degrees to 60 degrees, including 20 degrees and 60 degrees.

[0019] In some embodiments, the reducing agent delivery system wherein the inlet body is coupled to the outlet body only through the outer delivery pipe.

[0020] In some embodiments, the reducing agent delivery system further includes an inlet body inner shell, the inlet body inner shell including: a first flange of the inlet body inner shell coupled to the inner surface of the outer conveying shell of the inlet body; a second flange of the inlet body inner shell coupled to the inner surface of the outer conveying shell of the inlet body; and an inlet body inner shell wall, the inlet body inner shell wall being adjacent to the first flange and the second flange of the inlet body inner shell and separate from the inner surface of the outer conveying shell of the inlet body.

[0021] In some embodiments, the reducing agent delivery system further includes a diverter plate, the diverter plate comprising: a diverter plate coupling surface coupled to the inner shell wall of the inlet body; and a diverter plate panel adjacent to the diverter plate coupling surface.

[0022] In some embodiments, the reducing agent delivery system further includes a deflector comprising: a deflector base coupled to the manifold panel and the inner shell wall of the inlet body; a deflector end adjacent to and coupled to the manifold panel; and more than one deflector end hole disposed in the deflector end.

[0023] In some embodiments, the inlet body inner shell further includes an inlet body inner shell end cap, the inlet body inner shell end cap being adjacent to the inlet body inner shell wall, the steering gear base being coupled to the inlet body inner shell end cap, and the steering gear end cap being coupled to the inlet body inner shell end cap. Attached Figure Description

[0024] Details of one or more implementations are set forth in the accompanying drawings and the following description. Other features, aspects, and advantages of this disclosure will become apparent from the specification, drawings, and claims, wherein:

[0025] Figure 1 This is a block diagram illustrating an example exhaust aftertreatment system;

[0026] Figure 2 It is used for Figure 1 A perspective view of an example reducing agent delivery system for an exhaust aftertreatment system shown;

[0027] Figure 3 yes Figure 2 The front view of the reducing agent delivery system shown;

[0028] Figure 4 yes Figure 2 The side view of the reducing agent delivery system shown;

[0029] Figure 5 yes Figure 2 Rear view of the reducing agent delivery system shown;

[0030] Figure 6 It is intercepted along plane AA. Figure 3 The side view of the reducing agent delivery system shown;

[0031] Figure 7 yes Figure 6 A perspective view of the reducing agent delivery system shown.

[0032] Figure 8 It is intercepted along plane BB. Figure 4 Rear view of the reducing agent delivery system shown;

[0033] Figure 9 yes Figure 2The diagram shows a top perspective view of the reducing agent delivery system, with some components hidden.

[0034] Figure 10 yes Figure 2 Another top perspective view of the reducing agent delivery system shown, with some components hidden;

[0035] Figure 11 It is used for Figure 1 A perspective view of an example reducing agent delivery system for an exhaust aftertreatment system shown;

[0036] Figure 12 yes Figure 11 The front view of the reducing agent delivery system shown;

[0037] Figure 13 yes Figure 11 The side view of the reducing agent delivery system shown;

[0038] Figure 14 yes Figure 11 Rear view of the reducing agent delivery system shown;

[0039] Figure 15 It is intercepted along plane CC. Figure 12 The side view of the reducing agent delivery system shown;

[0040] Figure 16 It is intercepted along plane DD. Figure 13 Rear view of the reducing agent delivery system shown;

[0041] Figure 17 It is cut along the plane EE. Figure 13 The side view of the reducing agent delivery system shown;

[0042] Figure 18 It is intercepted along plane FF. Figure 13 The side view of the reducing agent delivery system shown;

[0043] Figure 19 It is intercepted along plane GG. Figure 14 A side view of a portion of the reducing agent delivery system shown;

[0044] Figure 20 It is used for Figure 1 A perspective view of an example reducing agent delivery system for an exhaust aftertreatment system shown;

[0045] Figure 21 yes Figure 20 The front view of the reducing agent delivery system shown;

[0046] Figure 22 yes Figure 20 The side view of the reducing agent delivery system shown;

[0047] Figure 23 yes Figure 20 Rear view of the reducing agent delivery system shown;

[0048] Figure 24 It is intercepted along plane HH. Figure 21 The side view of the reducing agent delivery system shown;

[0049] Figure 25 It is intercepted along plane JJ. Figure 22 Rear view of the reducing agent delivery system shown;

[0050] Figure 26 It is intercepted along the plane LL. Figure 22 The side view of the reducing agent delivery system shown;

[0051] Figure 27 It is intercepted along plane KK. Figure 22 The side view of the reducing agent delivery system shown;

[0052] Figure 28 It is intercepted along plane MM. Figure 22 Rear view of the reducing agent delivery system shown;

[0053] Figure 29 It is used for Figure 1 A perspective view of an example reducing agent delivery system for an exhaust aftertreatment system shown;

[0054] Figure 30 yes Figure 29 The front view of the reducing agent delivery system shown;

[0055] Figure 31 yes Figure 29 The side view of the reducing agent delivery system shown;

[0056] Figure 32 yes Figure 29 Rear view of the reducing agent delivery system shown;

[0057] Figure 33 It is intercepted along plane NN. Figure 30 The side view of the reducing agent delivery system shown;

[0058] Figure 34 It is cut along the plane PP. Figure 31 Rear view of the reducing agent delivery system shown;

[0059] Figure 35 It is a cut along the plane QQ. Figure 31 Rear view of the reducing agent delivery system shown;

[0060] Figure 36 It is intercepted along plane RR. Figure 31 The rear view of the reducing agent delivery system shown; and

[0061] Figure 37 It is intercepted along the SS plane. Figure 31 A portion of the rear view of the reducing agent delivery system shown.

[0062] It will be appreciated that the accompanying drawings, in part or in whole, are schematic representations for illustrative purposes. These drawings are provided to illustrate one or more implementations and are clearly understood not to be used to limit the scope or meaning of the claims. Detailed Implementation

[0063] The following describes in more detail several concepts and implementations related to methods, apparatus, and methods for treating exhaust gases from internal combustion engines. The concepts described above and discussed in more detail below can be implemented in any of a variety of ways, as the described concepts are not limited to any particular implementation. Examples of specific implementations and applications are provided primarily for illustrative purposes.

[0064] I. Overview

[0065] Internal combustion engines (e.g., diesel internal combustion engines, etc.) produce substances containing NO. X Exhaust gas containing components of NO, N2, CO2, and / or H2O. In some applications, exhaust gas aftertreatment systems are used to add reducing agents to the exhaust gas to reduce NO content. X Emissions. These exhaust aftertreatment systems may include a decomposition chamber in which a reducing agent is supplied and mixed with the exhaust gas.

[0066] Exhaust aftertreatment systems are defined by space claims. A space claim is the amount of physical space consumed by the exhaust aftertreatment system during installation (e.g., on a vehicle) and the location of the exhaust aftertreatment system within that physical space (e.g., coordinates relative to the vehicle's coordinate system). In some applications, the physical space available to the exhaust aftertreatment system is limited due to the location of surrounding components, wiring or piping requirements, or other similar constraints. Therefore, it is generally desirable to minimize the space claim of the exhaust aftertreatment system as much as possible so that it can be used in as many applications as possible. The decomposition chamber within which a reducing agent is provided and mixed with the exhaust gas constitutes a significant part of the space claim.

[0067] The embodiments described herein relate to an exhaust aftertreatment system including a reducing agent delivery system. The reducing agent delivery system includes an inlet body for receiving exhaust gas from an upstream component and providing exhaust gas with a reducing agent, an outlet body for providing exhaust gas to a downstream component, and two delivery pipes for transporting exhaust gas from the inlet body to the outlet body. The inlet body may include a splitter, a diverter, and an inner shell for differently guiding and separating the exhaust gas received from the upstream component and differently enhancing the vortex of the exhaust gas and reducing agent. The delivery pipes may be nested such that one delivery pipe extends within the other, allowing exhaust gas to flow between the delivery pipes to heat the inner delivery pipe. The reducing agent delivery system described herein can be used across multiple different applications (e.g., different internal combustion engines, different exhaust aftertreatment systems, etc.) and is easily scalable.

[0068] The delivery pipe is coupled to the inlet and outlet bodies at an angle (e.g., along the tangent of the outlet body). This allows the length of the delivery pipe to be increased without significantly increasing the distance between the inlet and outlet bodies. Consequently, the mixing length of the exhaust gas can be increased without significantly increasing the space requirements of the reducing agent delivery system, and consequently, the uniformity index (UI) of the reducing agent in the exhaust gas can be increased.

[0069] II. Example of an exhaust aftertreatment system

[0070] Figure 1 An exhaust aftertreatment system 100 is depicted having an example reductant delivery system 102 for an exhaust duct system 104. The exhaust aftertreatment system 100 also includes a particulate filter (e.g., a diesel particulate filter (DPF)) 106 and a selective catalytic reduction (SCR) catalyst component 108.

[0071] Particulate filter 106 is configured to remove particulate matter, such as soot, from exhaust gas flowing in exhaust duct system 104. Particulate filter 106 includes an inlet and an outlet, receiving exhaust gas at the inlet and discharging exhaust gas at the outlet after substantially filtering out particulate matter and / or converting particulate matter into carbon dioxide. In some implementations, particulate filter 106 may be omitted.

[0072] The reducing agent delivery system 102 includes a decomposition chamber 110 (e.g., a decomposition reactor, reactor piping, decomposition pipe, reactor tube, etc.). The decomposition chamber 110 is configured to convert the reducing agent into ammonia. The reducing agent may be, for example, urea, diesel exhaust fluid (DEF), etc. Urea aqueous solution (UWS), aqueous urea solution (e.g., AUS32, etc.), and other similar fluids. The decomposition chamber 110 includes fluidly coupled to the particulate filter 106 (e.g., fluidly configured to communicate with the particulate filter 106, etc.) to receive fluids containing NO. X The exhaust inlet for emissions and the inlet for exhaust, NO X Emissions, ammonia, and / or reducing agents flow to the outlet of SCR catalyst component 108.

[0073] The reducing agent delivery system 102 also includes a dispensing module 112 (e.g., a dispenser, etc.) configured to dispense reducing agent into the decomposition chamber 110. The dispensing module 112 may include a spacer inserted between a portion of the dispensing module 112 and a portion of the decomposition chamber 110 on which the dispensing module 112 is mounted.

[0074] The dispensing module 112 is fluidly coupled to the reducing agent source 114. The reducing agent source 114 may include more than one reducing agent source 114. The reducing agent source 114 may, for example, contain... The diesel engine exhaust aftertreatment fluid tank. A reducing agent pump 116 (e.g., a supply unit, etc.) is used to pressurize the reducing agent from the reducing agent source 114 to deliver it to the dispensing module 112. In some embodiments, the reducing agent pump 116 is pressure-controlled (e.g., controlled to obtain a target pressure, etc.). The reducing agent pump 116 includes a reducing agent filter 118. The reducing agent filter 118 filters (e.g., strains, etc.) the reducing agent before it is supplied to the internal components (e.g., pistons, vanes, etc.) of the reducing agent pump 116. For example, the reducing agent filter 118 may inhibit or prevent the transport of solids (e.g., solidified reducing agent, contaminants, etc.) to the internal components of the reducing agent pump 116. In this way, the reducing agent filter 118 may facilitate an extended operating time for the reducing agent pump 116 to meet requirements. In some embodiments, the reducing agent pump 116 is coupled (e.g., attached, fixed to, welded to, integrated into, etc.) to the chassis of a vehicle associated with the exhaust aftertreatment system 100.

[0075] The dispensing module 112 includes at least one injector 120. Each injector 120 is configured to dispense reducing agent into exhaust gas (e.g., within the decomposition chamber 110, etc.). In some embodiments, the reducing agent delivery system 102 further includes an air pump 122. In these embodiments, the air pump 122 draws air from an air source 124 (e.g., an air inlet, etc.) and through an air filter 126 disposed upstream of the air pump 122. Additionally, the air pump 122 supplies air to the dispensing module 112 via a duct. In these embodiments, the dispensing module 112 is configured to mix air and reducing agent into an air-reducing agent mixture and to supply the air-reducing agent mixture to the decomposition chamber 110. In other embodiments, the reducing agent delivery system 102 does not include an air pump 122 or an air source 124. In such embodiments, the dispensing module 112 is not configured to mix the reducing agent with air.

[0076] The dispensing module 112 and the reducing agent pump 116 are also electrically or communicatively coupled to the reducing agent delivery system controller 128. The reducing agent delivery system controller 128 is configured to control the dispensing module 112 to dispense reducing agent into the decomposition chamber 110. The reducing agent delivery system controller 128 may also be configured to control the reducing agent pump 116.

[0077] The reducing agent delivery system controller 128 includes processing circuitry 130. Processing circuitry 130 includes a processor 132 and a memory 134. Processor 132 may include a microprocessor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a combination thereof. Memory 134 may include, but is not limited to, electronic, optical, magnetic, or any other storage or transmission device capable of providing program instructions to the processor, ASIC, FPGA, etc. Memory 134 may include memory chips, electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), flash memory, or any other suitable memory from which the reducing agent delivery system controller 128 can read instructions. Instructions may include code in any suitable programming language. Memory 134 may include more than one module that includes instructions configured to be implemented by processor 132.

[0078] In various embodiments, the reducing agent delivery system controller 128 is configured to communicate with the central controller 136 (e.g., engine control unit (ECU), engine control module (ECM), etc.) of the internal combustion engine having the exhaust aftertreatment system 100. In some embodiments, the central controller 136 and the reducing agent delivery system controller 128 are integrated into a single controller.

[0079] In some embodiments, the central controller 136 may communicate with a display device (e.g., a screen, monitor, touchscreen, head-up display (HUD), indicator light, etc.). The display device may be configured to change its state in response to receiving information from the central controller 136. For example, the display device may be configured to change between a static state (e.g., displaying a green light, displaying a "System OK" message, etc.) and an alarm state (e.g., displaying a flashing red light, displaying a "Service Required" message, etc.) based on communication from the central controller 136. By changing the state, the display device may provide an indication of the status (e.g., operation, service required, etc.) of the reducing agent delivery system 102 to a user (e.g., operator, etc.).

[0080] The decomposition chamber 110 is located upstream of the SCR catalyst component 108. Thus, the reducing agent is injected upstream of the SCR catalyst component 108 via the injector 120, causing the SCR catalyst component 108 to receive the mixture of the reducing agent and exhaust gas. The reducing agent droplets undergo evaporation, pyrolysis, and hydrolysis processes to form non-NOx substances within the decomposition chamber 110, the SCR catalyst component 108, and / or the exhaust duct system 104. X Emissions (e.g., gaseous ammonia).

[0081] SCR catalyst component 108 is configured to accelerate the reaction of NO in the reducing agent and exhaust gas. X NO between X The restoration process helps NO X The emissions are reduced to diatomic nitrogen, water, and / or carbon dioxide. The SCR catalyst component 108 includes an inlet fluidly coupled to the decomposition chamber 110 and receiving exhaust gas and reductant therefrom, and an outlet fluidly coupled to the end of the exhaust duct system 104.

[0082] The reducing agent delivery system 102 also includes an upstream temperature sensor 138 (e.g., a thermocouple, etc.). The upstream temperature sensor 138 is configured to determine the temperature of the exhaust gas upstream of the injector 120 (e.g., within the decomposition chamber 110, within the exhaust duct system 104, etc.). The upstream temperature sensor 138 is electrically or communicatively coupled to the reducing agent delivery system controller 128 and is configured to provide the upstream exhaust gas temperature to the reducing agent delivery system controller 128.

[0083] The reducing agent delivery system 102 also includes a pressure sensor 140 (e.g., a differential pressure sensor, a capacitive pressure sensor, etc.). The pressure sensor 140 is configured to determine the pressure of the exhaust gas (e.g., within the decomposition chamber 110, within the exhaust duct system 104, etc.). The pressure sensor 140 is electrically or communicatively coupled to the reducing agent delivery system controller 128 and is configured to provide the exhaust gas pressure to the reducing agent delivery system controller 128.

[0084] The reducing agent delivery system 102 also includes a downstream temperature sensor 142 (e.g., a thermocouple). The downstream temperature sensor 142 is configured to determine the exhaust temperature downstream of the injector 120 (e.g., within the decomposition chamber 110, within the exhaust duct system 104, etc.). The downstream temperature sensor 142 is electrically or communicatively coupled to the reducing agent delivery system controller 128 and is configured to provide the flow temperature of the downstream exhaust to the reducing agent delivery system controller 128.

[0085] The exhaust aftertreatment system 100 may also include (e.g., downstream of the SCR catalyst component 108 or upstream of the particulate filter 106) an oxidation catalyst (e.g., a diesel oxidation catalyst (DOC)) fluidly coupled to the exhaust duct system 104 to oxidize hydrocarbons and carbon monoxide in the exhaust.

[0086] In some embodiments, the particulate filter 106 may be located downstream of the decomposition chamber 110. For example, the particulate filter 106 and the SCR catalyst component 108 may be combined into a single unit. In some embodiments, the dispensing module 112 may alternatively be located downstream of or upstream of the turbocharger.

[0087] Although the exhaust aftertreatment system 100 has been shown and described in the context of use with a diesel internal combustion engine, it should be understood that the exhaust aftertreatment system 100 can be used with other internal combustion engines (e.g., gasoline internal combustion engines, hybrid internal combustion engines, propane internal combustion engines, and other similar internal combustion engines).

[0088] III. First Example Reducing Agent Delivery System

[0089] Figures 2-10 A reducing agent delivery system 200 according to an example embodiment is shown. In various embodiments, the reducing agent delivery system 200 is a reducing agent delivery system 102. The reducing agent delivery system 200 includes a reducing agent delivery system body 201 (e.g., a housing, frame, assembly, etc.). The reducing agent delivery system body 201 includes an inlet body 204 (e.g., a housing, frame, assembly, etc.). The inlet body 204 includes an inlet body inlet 206 (e.g., an opening, orifice, etc.). The inlet body inlet 206 is configured to receive exhaust gas from an exhaust duct system 104. In some embodiments, the reducing agent delivery system 200 is positioned downstream of a particulate filter 106 such that the inlet body inlet 206 receives exhaust gas from the particulate filter 106.

[0090] The inlet body 204 includes an inlet body coupler 208 (e.g., a body, etc.). The inlet body coupler 208 intersects (e.g., externally connects, etc.) with the inlet body inlet 206. The inlet body coupler 208 is coupled (e.g., attached to, fixed to, welded to, integrated into, etc.) around the inlet body inlet 206 (e.g., near the inlet body inlet 206, etc.) to (e.g., attached to, fixed to, welded to, integrated into, etc.) the exhaust duct system 104. In various embodiments, the inlet body coupler 208 is circular.

[0091] The inlet body 204 also includes an inlet body outer mounting shell 210 (e.g., a body, frame, etc.). The inlet body outer mounting shell 210 includes an inlet body outer mounting shell coupling surface 212 (e.g., a surface, etc.). In various embodiments, the inlet body outer mounting shell coupling surface 212 is arranged along an arc. The inlet body outer mounting shell coupling surface 212 contacts the inlet body coupler coupling surface 214 (e.g., a surface, etc.) of the inlet body coupler 208. In various embodiments, the inlet body coupler coupling surface 214 is arranged along an arc. In various embodiments, the inlet body outer mounting shell coupling surface 212 is coupled to the inlet body coupler coupling surface 214 (e.g., a surface, etc.) of the inlet body coupler 208.

[0092] The inlet body 204 also includes an inlet body outer transfer shell 216 (e.g., a body, frame, etc.). The inlet body outer transfer shell 216 includes an inlet body outer transfer shell coupling surface 218 (e.g., a surface, etc.). In various embodiments, the inlet body outer transfer shell coupling surface 218 is arranged along an arc. In some embodiments, the inlet body outer mounting shell coupling surface 212 is arranged along an arc having a first radius, and the inlet body outer transfer shell coupling surface 218 is arranged along an arc having a first radius. In some embodiments, both the inlet body outer mounting shell coupling surface 212 and the inlet body outer transfer shell coupling surface 218 are arranged along the same circle. In various embodiments, the inlet body outer transfer shell coupling surface 218 is coupled to the inlet body coupler coupling surface 214.

[0093] The inlet body outer mounting shell 210 includes an inlet body outer mounting shell mating surface 220 (e.g., a face, etc.). The inlet body outer mounting shell mating surface 220 abuts against the inlet body outer mounting shell coupling surface 212. Similarly, the inlet body outer transfer shell 216 includes an inlet body outer transfer shell mating surface 222 (e.g., a face, etc.). The inlet body outer transfer shell mating surface 222 abuts against the inlet body outer transfer shell coupling surface 218. In various embodiments, the inlet body outer mounting shell mating surface 220 is coupled to the inlet body outer transfer shell mating surface 222, such that the inlet body outer mounting shell 210 is coupled to the inlet body outer transfer shell 216. The inlet body outer mounting shell 210 and the inlet body outer transfer shell 216 together define an inlet body cavity 224 (e.g., a gap, area, space, etc.).

[0094] The inlet body 204 also includes an inlet body inner shell 226 (e.g., a body, frame, etc.). The inlet body inner shell 226 is contained within the inlet body cavity 224. The inlet body inner shell 226 includes an inlet body inner shell first flange 228 (e.g., a rib, etc.). The inlet body inner shell first flange 228 contacts an inlet body outer mounting shell inner surface 230 (e.g., a face, etc.) of the inlet body outer mounting shell 210. In various embodiments, the inlet body inner shell first flange 228 is coupled to the inlet body outer mounting shell inner surface 230. In some embodiments, the inlet body outer mounting shell inner surface 230 is opposite to the inlet body outer mounting shell coupling surface 212.

[0095] The inlet body inner shell 226 also includes an inlet body inner shell second flange 232 (e.g., a rib, etc.). The inlet body inner shell second flange 232 contacts (e.g., mates with) the inner surface 230 of the inlet body outer mounting shell. In various embodiments, the inlet body inner shell second flange 232 is coupled to the inner surface 230 of the inlet body outer mounting shell.

[0096] The inlet body inner shell 226 also includes an inlet body inner shell wall 234. The inlet body inner shell wall 234 abuts against the inlet body inner shell first flange 228 and the inlet body inner shell second flange 232. The inlet body inner shell first flange 228 and the inlet body inner shell second flange 232 cooperate to separate the inlet body inner shell wall 234 from the inlet body outer mounting shell inner surface 230 and the inlet body outer transfer shell inner surface 236 (e.g., a face, etc.) of the inlet body outer transfer shell 216. In some embodiments, the inlet body outer transfer shell inner surface 236 is opposite to the inlet body outer transfer shell coupling surface 218. In various embodiments, the inlet body inner shell wall 234 is arranged along an arc.

[0097] The inlet body 204 also includes a manifold 238 (e.g., a flange, wall, etc.). The manifold 238 is at least partially contained within the inner shell wall 234 of the inlet body. The manifold 238 includes a manifold coupling surface 240 (e.g., a surface, etc.). In various embodiments, the manifold coupling surface 240 is arranged along an arc. In other embodiments, the manifold coupling surface 240 is arranged along an elliptical arc.

[0098] The manifold coupling surface 240 includes a first end 242, a second end 244, and a middle portion 246 extending between the first end 242 and the second end 244. The first end 242 is positioned near the first flange 228 of the inlet body inner shell and contacts and / or couples to the inner shell wall 234. The second end 244 is positioned near the second flange 232 of the inlet body inner shell and contacts and / or couples to the inner shell wall 234. The middle portion 246 is separated from the inner shell wall 234.

[0099] The middle portion 246 of the manifold coupling surface has a center point 247. The center point 247 of the middle portion of the manifold coupling surface is coupled to the inner shell wall 234 of the inlet body.

[0100] The inlet body inlet 206 is disposed along the inlet body inlet plane 248. The first end 242 of the manifold coupling surface is separated from the inlet body inlet plane 248 by a first distance D1. In some embodiments, D1 is approximately equal to 85 mm (e.g., differing from 85 mm by no more than 5%). The second end 244 of the manifold coupling surface is separated from the inlet body inlet plane 248 by a second distance D2. In some embodiments, D2 is approximately equal to 52 mm. In various embodiments, D1 is greater than D2. Thus, the exhaust velocity exiting the inlet body 204 may increase because the cross-sectional area between the manifold 238 and the inlet body inner shell 226 decreases along the inlet body inner shell wall 234. In some embodiments, D1 is equal to D2. In other embodiments, D1 is less than D2.

[0101] The main entrance 206 is defined by the main entrance center point 250 (e.g., the center of mass). The main entrance 206 is bisected by the reducing agent delivery system main body bisecting plane 252. The reducing agent delivery system main body bisecting plane 252 divides the reducing agent delivery system main body 201 into two parts and intersects with the main entrance center point 250.

[0102] The first end 242 of the manifold coupling surface and / or the first flange 228 of the inlet body inner shell are separated from the bisecting plane 252 of the reducing agent delivery system body by a first angular distance α1. In some embodiments, α1 is approximately equal to 30°. The second end 244 of the manifold coupling surface and / or the second flange 232 of the inlet body inner shell are separated from the bisecting plane 252 of the reducing agent delivery system body by a second angular distance α2. In some embodiments, α2 is approximately equal to 9.5°. In various embodiments, α1 is greater than α2. In some embodiments, α1 is equal to α2. In other embodiments, α1 is less than α2.

[0103] Diverter 238 includes diverter panel 254 (e.g., face, surface, portion, etc.). Diverter panel 254 is adjacent to diverter coupling surface 240. In various embodiments, diverter panel 254 is angled (e.g., tilted, inclined, etc.) relative to inlet body inlet plane 248.

[0104] The manifold panel 254 includes a manifold panel groove 256 (e.g., a hole, opening, window, etc.). The manifold panel groove 256 facilitates the flow of exhaust gas through the manifold panel 254, rather than around the manifold panel 254. The manifold panel groove 256 is defined by a first arc length β1 along the manifold panel 254. In some embodiments, β1 is approximately equal to 55°. The manifold panel groove 256 is also defined by a first width W1 along the manifold panel 254. In some embodiments, W1 is approximately equal to 10 mm. In various embodiments, W1 is constant along β1.

[0105] The inlet body inner shell 226 also includes an inlet body inner shell end cap 258. The inlet body inner shell end cap 258 is adjacent to the inlet body inner shell wall 234. The inlet body inner shell end cap 258 is separate from the inlet body outer transfer shell mating surface 222 and the inlet body outer mounting shell inner surface 230.

[0106] The inlet body 204 also includes a steering mechanism 260 (e.g., a guard, flange, etc.). The steering mechanism 260 is at least partially contained within the inner shell wall 234 of the inlet body. The steering mechanism 260 includes a steering mechanism wall edge 262 (e.g., a face, etc.). In various embodiments, the steering mechanism wall edge 262 is coupled to the inner shell wall 234 of the inlet body. The steering mechanism 260 also includes a steering mechanism end cap edge 264 (e.g., a face, etc.) adjacent to the steering mechanism wall edge 262. In various embodiments, the steering mechanism end cap edge 264 is coupled to the inner shell end cap 258 of the inlet body. The steering mechanism 260 also includes a steering mechanism panel edge 266 (e.g., a face, etc.) adjacent to the steering mechanism wall edge 262. In various embodiments, the steering mechanism panel edge 266 is coupled to the splitter panel 254.

[0107] Steering unit 260 includes a steering unit base 268 and a steering unit end 270. Steering unit wall edge 262, steering unit end cap edge 264, and steering unit panel edge 266 extend along the steering unit base 268. Steering unit end cap edge 264 and steering unit panel edge 266 extend along the steering unit end 270. However, the steering unit wall edge 262 does not extend along the steering unit end 270. The steering unit base 268 is disposed along a plane (e.g., it is planar, flat, etc.). The steering unit base 268 is angularly separated from the bisecting plane 252 of the reducing agent delivery system body by a third angular distance α3. In some embodiments, α3 is approximately equal to 10.5°. Unlike the steering unit base 268, the steering unit end 270 is not disposed along a plane. Instead, the steering unit end 270 is curved (e.g., curled, bent, deflected, etc.) relative to the steering unit base 268 and is defined by a second arc length β2 along the inlet plane 248 of the inlet body. In some embodiments, β2 is approximately equal to 72° (e.g., 72.3°, etc.).

[0108] The steering end 270 includes at least one steering end hole 272 (e.g., opening, hole, perforation, etc.). In various embodiments, the steering end 270 includes more than one steering end hole 272. In some embodiments, the steering end holes 272 are uniformly (e.g., in rows and columns, etc.) arranged between the steering wall edge 262 and the steering panel edge 266 along the steering end 270. In one embodiment, the steering end 270 includes fifteen steering end holes 272 arranged in three rows and five columns. In some embodiments, each steering end hole 272 is elliptical. In some of these embodiments, each steering end hole 272 is elliptical and has a major axis approximately equal to 8.7 mm (e.g., 8.67 mm, etc.) and a minor axis approximately equal to 7 mm. In various embodiments, each steering end hole 272 is circular and defined by a diameter. In other embodiments, each steering end hole 272 is a square, rectangular, polygonal, or other similar shape. The number and size of the steering end orifices 272 are related to the back pressure of the reducing agent delivery system 200. By increasing the number and / or size of the steering end orifices 272, the back pressure of the reducing agent delivery system 200 is reduced. Additionally, increasing the number / size of the steering end orifices 272 can reduce the impact of the reducing agent near the steering base 268, as the recirculation zone adjacent to the steering base 268 is reduced due to the flushing facilitated by the steering end orifices 272. By reducing the number / size of the steering end orifices 272, additional flow is provided around the steering end 270, thereby increasing heat transfer and shear on the inner wall 234 of the inlet body. In some embodiments, such as Figure 7As shown, the steering gear end holes 272 are all formed within a truncated cone extending away from the outer mounting housing 210 of the inlet body. Because they are formed within the truncated cone, the flow into each steering gear end hole 272 is collected and concentrated before flowing through the steering gear end hole 272.

[0109] The inlet body outer mounting housing 210 also includes an inlet body outer mounting housing diversion surface 274 (e.g., a face, panel, etc.). The inlet body outer mounting housing diversion surface 274 is adjacent to the inner surface 230 of the inlet body outer mounting housing. The inlet body outer mounting housing diversion surface 274 is disposed along a plane parallel to the inlet plane 248 of the inlet body and is separated from the inlet plane 248 of the inlet body by a third distance D3. In some embodiments, D3 is approximately equal to 79 mm (e.g., 78.9 mm, etc.). In various embodiments, D3 is greater than D2 and less than D1.

[0110] The inlet body outer mounting housing 210 also includes an inlet body outer mounting housing protruding surface 276 (e.g., a face, panel, etc.). The inlet body outer mounting housing protruding surface 276 is adjacent to the inlet body outer mounting housing inner surface 230 and the inlet body outer mounting housing diversion surface 274. The inlet body outer mounting housing protruding surface 276 includes an inlet body outer mounting housing inner mounting surface 278 (e.g., a face, panel, etc.) and an inlet body outer mounting housing turning surface 280 (e.g., a face, panel, etc.). The inlet body outer mounting housing inner mounting surface 278 is angularly separated from the reducing agent delivery system body bisecting plane 252 (e.g., a plane parallel to the reducing agent delivery system body bisecting plane 252, etc.) by a fourth angular distance α4. In some embodiments, α4 is approximately equal to 11° (e.g., 10.6°, etc.). The inlet body outer mounting housing turning surface 280 is angularly separated from the reducing agent delivery system body bisecting plane 252 (e.g., a plane parallel to the reducing agent delivery system body bisecting plane 252, etc.) by a fifth angular distance α5. In some embodiments, α5 is approximately equal to 25° (e.g., 25.6°, etc.). In various embodiments, α5 is greater than α4. In some embodiments, α1 is greater than α5, α5 is greater than α2, and α2 is greater than α4.

[0111] The inlet body outer mounting housing 210 also includes an inlet body outer mounting housing recess 282 (e.g., a depression). The inlet body outer mounting housing recess 282 is opposite to the inlet body outer mounting housing protruding surface 276 and the inlet body outer mounting housing diversion surface 274. The inlet body outer mounting housing recess 282 includes an inlet body outer mounting surface 284 (e.g., a face, panel, etc.). The inlet body outer mounting surface 284 is opposite to the inlet body outer mounting housing inner mounting surface 278.

[0112] The inlet body outer mounting housing 210 includes a spray port 286 (e.g., an opening, hole, window, etc.). The spray port 286 extends through the outer mounting surface 284 and the inner mounting surface 278 of the inlet body outer mounting housing. The spray port 286 is configured to receive a spray mount 288 (e.g., a mounting plate, etc.). The spray mount 288 is configured to couple to the dispensing module 112 and / or the injector 120 such that the dispensing module 112 and / or the injector 120 are positioned to provide reducing agent to the inlet body outer mounting housing 210 via the spray port 286. The outer mounting surface 284 of the inlet body outer mounting housing is generally planar and facilitates coupling of the spray mount 288 in various orientations (e.g., rotational position, clocking position, etc.) to accommodate various configurations of the dispensing module 112 and / or the injector 120.

[0113] The inlet body 204 also includes a shroud assembly 290 (e.g., a cover, etc.). The shroud assembly 290 is disposed along an inner mounting surface 278 of the outer mounting housing of the inlet body and is configured to partially protect the reducing agent supplied through the injection port 286 from exhaust gases. The shroud assembly 290 includes a shroud flange 292 (e.g., a band, etc.). The shroud flange 292 is coupled to the inner mounting surface 278 of the outer mounting housing of the inlet body around the injection port 286. The shroud flange 292 extends around an inlet body inner housing second flange hole 293 formed in an inlet body inner housing second flange 232. For example, the shroud flange 292 may be coupled to the inlet body inner housing second flange 232 around the inlet body inner housing second flange hole 293. The shroud assembly 290 also includes a shroud plate 294 (e.g., a cover, etc.). The protective cover 294 is coupled to the protective cover flange 292 and the inner shell wall 234 of the inlet body, but not to the outer mounting shell 210 of the inlet body. For example... Figure 9As shown, with the inlet body outer mounting shell 210 concealed, the shield assembly 290 also includes a shield guide 295 (e.g., fins, walls, barriers, etc.). The shield guide 295 is coupled to the inlet body inner shell wall 234 and the shield flange 292 and / or shield plate 294. A portion of the shield guide 295 near the inlet body inlet plane 248 extends parallel to the inlet body inner shell second flange 232. A shield inlet 296 (e.g., hole, window, aperture, etc.) is formed between the shield plate 294, the shield flange 292, the shield guide 295, the inlet body inner shell second flange 232 (e.g., around the inlet body inner shell second flange hole 293, etc.), and the inlet body outer mounting shell inner surface 230 and / or the inlet body outer mounting shell inner mounting surface 278. The shield inlet 296 receives exhaust gas and provides exhaust gas into the shield assembly 290, and thus provides it around the injection port 286. The exhaust aid (e.g., assist, etc.) pushes the reducing agent toward the steering mechanism 260. The shield guide 295 guides a portion of the exhaust flowing between the inner wall 234 of the inlet body and the inner surface 236 of the outer conveyor shell of the inlet body into the shield inlet 296. The shield assembly 290 also includes a shield outlet 297 formed between the shield flange 292 and the shield plate 294. An injection-assisted portion of the first part of the exhaust (e.g., after the reducing agent has been provided into the exhaust) exits the shield assembly 290 via the shield outlet 297.

[0114] The inlet body outer transfer shell 216 includes an inlet body outer transfer shell outlet 298 (e.g., a hole, opening, etc.). The inlet body outer transfer shell outlet 298 extends through the inner surface 236 of the inlet body outer transfer shell and is adjacent to the inner shell wall 234 of the inlet body. In various embodiments, the inlet body outer transfer shell outlet 298 is elliptical. In other embodiments, the inlet body outer transfer shell outlet 298 is circular, square, rectangular, or other similar shapes.

[0115] The inlet body inner shell 226 also includes an inlet body inner shell outlet 300 (e.g., a hole, opening, etc.). The inlet body inner shell outlet 300 extends through the inlet body inner shell wall 234 and is adjacent to the inlet body outer transfer shell outlet 298. In various embodiments, the inlet body inner shell outlet 300 and the inlet body outer transfer shell outlet 298 are concentric (e.g., concentric ellipses, concentric circles, etc.). In various embodiments, the inlet body inner shell outlet 300 is elliptical. In other embodiments, the inlet body inner shell outlet 300 is circular, square, rectangular, or other similar shapes.

[0116] The reducing agent delivery system body 201 also includes an outer delivery pipe 302 (e.g., conduit, tubing, connector, etc.). The outer delivery pipe 302 is coupled to the inlet body outer delivery shell 216 around the outlet 298 of the inlet body outer delivery shell. The outer delivery pipe 302 includes a straight portion 304 and a curved portion 306. The straight portion 304 is adjacent to the curved portion 306 and separated from the inlet body outer delivery shell 216 by the curved portion 306. The curved portion 306 gradually curves from the straight portion 304 toward the inlet body outer delivery shell 216 to facilitate (e.g., due to the rounded shape of the inlet body outer delivery shell 216, etc.) a flush fit between the curved portion 306 and the inlet body outer delivery shell 216.

[0117] The straight portion 304 of the outer transfer tube is centered on the central axis 308 of the outer transfer tube. The central axis 308 of the outer transfer tube extends through the outlet 298 of the outer transfer shell of the inlet body and intersects with the inner shell 226 of the inlet body. In various embodiments, the straight portion 304 of the outer transfer tube has an elliptical cross-section along a plane orthogonal to the inlet plane 248 of the inlet body, intersecting with the central axis 308 of the outer transfer tube and intersecting with the bisecting plane 252 of the reducing agent delivery system body. In other embodiments, the straight portion 304 of the outer transfer tube has a circular, square, rectangular or other similar cross-section along a plane orthogonal to the inlet plane 248 of the inlet body, intersecting with the central axis 308 of the outer transfer tube and intersecting with the bisecting plane 252 of the reducing agent delivery system body.

[0118] The central axis 308 of the outer delivery tube is separated from the main body of the reducing agent delivery system by a first separation angle φ1 along a plane parallel to the inlet plane 248 of the inlet body. In some embodiments, φ1 is approximately equal to 33° (e.g., 33.6°, etc.). In various embodiments, φ1 is less than 50°.

[0119] The reducing agent delivery system body 201 also includes an inner delivery tube 310 (e.g., conduit, tubing, connector, etc.). The inner delivery tube 310 is coupled to the inlet body inner shell 226 around the outlet 300 of the inlet body inner shell. The inner delivery tube 310 extends within the outer delivery tube 302 (e.g., the inner delivery tube 310 is partially contained within the outer delivery tube 302, the inner delivery tube 310 is nested within the outer delivery tube 302, etc.). The inner delivery tube 310 includes a straight portion 312 and a curved portion 314. The straight portion 312 is adjacent to the curved portion 314 and is separated from the inlet body inner shell 226 by the curved portion 314. The curved portion 314 gradually curves from the straight portion 312 toward the inlet body inner shell 226 to facilitate (e.g., due to the rounded shape of the inlet body inner shell 226, etc.) a flush fit between the curved portion 314 and the inlet body inner shell 226.

[0120] The straight portion 312 of the inner transfer tube is centered on the central axis 316 of the inner transfer tube. The central axis 316 of the inner transfer tube extends through the outlet 300 of the inner shell of the inlet body and intersects with the inner shell 226 of the inlet body. In various embodiments, the straight portion 312 of the inner transfer tube has an elliptical cross-section along a plane orthogonal to the inlet plane 248 of the inlet body, intersecting with the central axis 316 of the inner transfer tube and intersecting with the bisecting plane 252 of the reducing agent delivery system body. In other embodiments, the straight portion 312 of the inner transfer tube has a circular, square, rectangular or other similar cross-section along a plane orthogonal to the inlet plane 248 of the inlet body, intersecting with the central axis 316 of the inner transfer tube and intersecting with the bisecting plane 252 of the reducing agent delivery system body. In various embodiments, the central axis 316 of the inner transfer tube coincides with the central axis 308 of the outer transfer tube.

[0121] The central axis 316 of the inner delivery tube is separated from the main body of the reducing agent delivery system by a second separation angle φ2 along a plane parallel to the inlet plane 248 of the inlet body. In various embodiments, φ2 is less than or approximately equal to 50°. In some embodiments, φ1 is approximately equal to φ2. In various embodiments, φ1 and / or φ2 are approximately equal to angles in the range of 20° to 60°, including 20° and 60° (e.g., 19°, 20°, 25°, 37°, 40°, 45°, 50°, 60°, 61°, etc.).

[0122] In one exemplary embodiment, the straight portion 304 of the outer delivery pipe (along a plane orthogonal to the inlet body inlet plane 248, intersecting the central axis 308 of the outer delivery pipe, and intersecting the bisecting plane 252 of the reducing agent delivery system body) has an elliptical cross-section with a semi-major axis of P1 and a semi-minor axis of Q1, and the straight portion 312 of the inner delivery pipe (along a plane orthogonal to the inlet body inlet plane 248, intersecting the central axis 316 of the inner delivery pipe, and intersecting the bisecting plane 252 of the reducing agent delivery system body) has an elliptical cross-section with a semi-major axis of P2 and a semi-minor axis of Q2. In various embodiments,

[0123] P2=K*P1 (1)

[0124] Q2=K*Q1 (2) P2 is the product of P1 and factor K, and Q2 is the product of Q1 and factor K. In these embodiments, an annular elliptical space is formed between the inner conveyor tube straight section 312 and the outer conveyor tube straight section 304, which produces an approximately constant distance between the inner conveyor tube straight section 312 and the outer conveyor tube straight section 304 (e.g., along the perimeter of the inner conveyor tube straight section 312).

[0125] The straight portion 304 of the outer delivery tube is coupled to the outlet body shell 318 (e.g., body, frame, etc.) of the outlet body 320 (e.g., shell, frame, assembly, etc.) of the reducing agent delivery system body 201. Specifically, the straight portion 304 of the outer delivery tube is coupled to the outlet body shell 318 around the outlet body shell inlet 322 (e.g., hole, opening, etc.). In various embodiments, the inlet body 204 is coupled to the outlet body 320 only through the outer delivery tube 302. The outlet body shell inlet 322 extends through the outlet body shell inner surface 324 (e.g., face, etc.) of the outlet body shell 318. In various embodiments, the outlet body shell inlet 322 is elliptical. In other embodiments, the outlet body shell inlet 322 is circular, square, rectangular, or other similar shapes.

[0126] The relationship between the outlet body shell inlet 322, the inlet body outer conveying shell outlet 298, and the inlet body inner shell outlet 300 makes the reducing agent delivery system 200 approximately Z-shaped or approximately S-shaped. This shape, compared to a case where the outlet body shell inlet 322, the inlet body outer conveying shell outlet 298, and the inlet body inner shell outlet 300 are arranged to make the reducing agent delivery system approximately B-shaped or approximately I-shaped, allows the exhaust gas to travel for a longer time within the outer conveying pipe 302 and the inner conveying pipe 310 over the same distance between the inlet body 204 and the outlet body 320 (e.g., between the center point of the inlet body 204 and the center point of the outlet body 320, etc.).

[0127] The outlet body 320 does not include an inner shell similar to the inlet body inner shell 226, a flow divider similar to the flow divider 238, or a steering mechanism similar to the steering mechanism 260. Instead of the inner shell coupled to the outlet body 320, the inner conveying pipe straight section 312 is not coupled to the outlet body 320. The inner conveying pipe straight section 312 does not extend substantially into the outlet body shell 318 (e.g., the maximum length of the portion of the inner conveying pipe straight section 312 located within the outlet body shell 318 is less than 5% of the diameter of the outlet body shell 318, etc.). Thus, the inner conveying pipe straight section 312 does not generate resistance to flow within the outlet body shell 318 (e.g., flow that forms eddies within the outlet body shell 318, etc.).

[0128] The outlet body 320 also includes an outlet body outlet 326 (e.g., an opening, a hole, etc.). The outlet body outlet 326 is configured to supply exhaust gas to the exhaust duct system 104. In some embodiments, the reductant delivery system 200 is positioned upstream of the SCR catalyst member 108 such that the SCR catalyst member 108 receives exhaust gas from the outlet body outlet 326.

[0129] The outlet body 320 also includes an outlet body coupler 328 (e.g., a body, etc.). The outlet body coupler 328 intersects with the outlet body outlet 326. The outlet body coupler 328 is coupled to the exhaust duct system 104 around the outlet body outlet 326. In various embodiments, the outlet body coupler 328 is circular.

[0130] The outlet body 320 also includes a perforated plate 330 (e.g., a wall, flange, etc.). The perforated plate 330 extends across the diameter of the outlet body housing 318. The perforated plate 330 includes a perforated plate coupling surface 332 (e.g., a surface, etc.). In various embodiments, the perforated plate coupling surface 332 is arranged in a circular shape. In other embodiments, the perforated plate coupling surface 332 is arranged in an elliptical shape.

[0131] The perforated plate 330 also includes more than one perforated plate perforation 334 (e.g., hole, opening, aperture, etc.). The perforated plate 330 is coupled to the outlet body housing 318 such that exhaust gas flowing out of the outlet body outlet 326 first passes through the perforated plate 330 via one of the perforated plate perforations 334 (e.g., so that no exhaust gas can bypass the perforated plate 330, etc.).

[0132] In various embodiments, the outlet body 320 also includes at least one flow guide. Each flow guide may be coupled to the perforated plate 330 and / or the inner surface 324 of the outlet body housing. Each flow guide extends within the outlet body housing 318. In some embodiments, the flow guide is coupled to the perforated plate 330 and the inner surface 324 of the outlet body housing. The flow guide may further increase the uniformity of exhaust flow from the outlet body outlet 326.

[0133] In operation, exhaust gas (e.g., from exhaust duct system 104, etc.) flows into inlet body inlet 206. As described herein, the exhaust gas flowing through reducing agent delivery system 200 is guided, diverted, and separated in various ways to promote enhanced mixing and decomposition of the reducing agent in the exhaust gas and to mitigate the impact of the reducing agent on the various surfaces of reducing agent delivery system 200. In these ways, reducing agent delivery system 200 may be more desirable than other systems that do not include similar mechanisms in terms of enhancing the mixing and decomposition of the reducing agent in the exhaust gas and mitigating the impact of the reducing agent (e.g., due to the additional cleaning of reducing agent deposits in these systems, etc.).

[0134] The first portion of the exhaust flows between the inner surface 230 of the outer mounting housing of the inlet body and the inner housing 226 of the inlet body (e.g., between the inner surface 230 of the outer mounting housing of the inlet body and the first flange 228 of the inner housing of the inlet body, between the inner surface 230 of the outer mounting housing of the inlet body and the second flange 232 of the inner housing of the inlet body, etc.) and subsequently along the protruding surface 276 of the outer mounting housing of the inlet body. Before flowing along the protruding surface 276 of the outer mounting housing of the inlet body, some of the first portion of the exhaust flows against the diversion surface 274 and / or the diversion plate 238 (e.g., the diversion plate panel 254, etc.) of the outer mounting housing of the inlet body. Then, the first portion of the exhaust flows between the diversion plate 238, the inner housing 226 of the inlet body and the diverter 260, and enters the inner delivery pipe bend 314 via the outlet 300 of the inner housing of the inlet body.

[0135] Before flowing into the inner transfer tube bend 314, the injection auxiliary portion of the exhaust gas in the first part flows into the shroud assembly 290 via the shroud inlet 296 (e.g., between the shroud plate 294, the shroud flange 292, and the inlet body outer mounting shell protruding surface 276, etc.). The injection auxiliary portion flows between the inlet body inner shell first flange 228, the inlet body inner shell second flange 232, and the inlet body outer mounting shell inner surface 230, and the inlet body outer transfer shell inner surface 236 is guided into the shroud inlet 296 by the shroud guide 295. The exhaust gas injection auxiliary portion flows around the injection orifice 286 and provides reducing agent via the injection orifice 286 (e.g., from the injector 120 and / or the dispensing module 112). The exhaust gas then exits the shroud assembly 290 via the shroud outlet 297. The exhaust gas injection auxiliary portion helps to push the reducing agent out of the injection orifice 286 and toward the inner transfer tube bend 314. Specifically, the shield assembly 290 protects (e.g., a baffle, etc.) the flow of exhaust and reducing agent toward the inner delivery pipe bend 314 from the flow of exhaust toward the inlet body inner shell end cap 258, thereby allowing additional reducing agent to be supplied to the inner delivery pipe bend 314 (e.g., rather than being pushed against the inlet body inner shell end cap 258, etc.). In various embodiments, the injection assist portion may be approximately equal to 5%, 4%, 3%, 2%, or other similar values ​​of the total exhaust flow into the inlet body inlet 206.

[0136] Furthermore, some of the first portion of the exhaust flows along the base 268 and end 270 of the steering gear before flowing into the inner transmission pipe bend 314. Due to α3 and β2, the exhaust is supplied from the steering gear 260 to the inlet body inner shell 226 and toward the inner transmission pipe bend 314.

[0137] Some of the exhaust flowing along the steering end 270 passes through the steering end 270 via at least one steering end hole 272. At least some of the at least one steering end hole 272 may be centered on an axis intersecting with the outlet 300 of the inlet body inner shell. Thus, the exhaust flowing through the at least one steering end hole 272 may be directed toward the outlet 300 of the inlet body inner shell (e.g., opposite to being directed toward the wall 234 of the inlet body inner shell). This exhaust may help to push the exhaust within the inlet body inner shell 226 toward the inner delivery pipe bend 314.

[0138] Unlike the exhaust flowing along the protruding surface 276 of the inlet body outer casing, a second portion of the exhaust flows through the manifold panel groove 256. The manifold panel groove 256 is positioned adjacent to the inner delivery pipe bend 314. In some embodiments, the manifold panel groove 256 is centered on an axis extending beyond the outlet 300 of the inlet body inner casing (e.g., such that the manifold panel groove 256 overlaps with the outlet 300 of the inlet body inner casing, etc.). The exhaust exiting the manifold panel groove 256 is propelled into the inner delivery pipe bend 314. The manifold panel groove 256 serves to reduce the back pressure of the reducing agent delivery system 200, thereby making the reducing agent delivery system 200 more ideal. In addition, the manifold panel groove 256 provides relatively hot exhaust (e.g., exhaust that is not mixed with reducing agent, etc.) along the inlet body inner casing wall 234 near the steering gear base 268. This reduces the impact of the reducing agent on the inlet body inner casing wall 234 near the steering gear base 268.

[0139] A third portion of the exhaust flows between the first flange 228 of the inlet body inner shell, the second flange 232 of the inlet body inner shell, the inner surface 230 of the inlet body outer mounting shell, and the inner surface 236 of the inlet body outer transfer shell. The exhaust flows along the inlet body inner shell 226, thereby heating the inlet body inner shell 226 and mitigating the impact of the reducing agent on the inlet body inner shell 226. The exhaust flows around the inner transfer pipe bend 314 and is propelled into the outer transfer pipe bend 306. This third portion of the exhaust may not be supplied with reducing agent and may be relatively hot compared to the exhaust flowing within the inner transfer pipe bend 314 (e.g., because the exhaust flowing within the inner transfer pipe bend 314 has been supplied with reducing agent) and the exhaust flowing within the inner transfer pipe straight section 312 (e.g., because the exhaust flowing within the inner transfer pipe straight section 312 has been supplied with reducing agent).

[0140] The exhaust gas flowing within the inner bend of the inner transfer pipe 314 flows toward the inner straight section of the inner transfer pipe 312, and the exhaust gas flowing within the outer bend of the outer transfer pipe 306 flows toward the outer straight section of the outer transfer pipe 304. The exhaust gas flowing within the outer bend of the outer transfer pipe 306 heats the inner bend of the inner transfer pipe 314 and / or the inner straight section of the inner transfer pipe 312, thereby reducing the impact of the reducing agent on the inner bend of the inner transfer pipe 314 and / or the inner straight section of the inner transfer pipe 312. Similarly, the exhaust gas flowing within the outer straight section of the outer transfer pipe 304 heats the inner bend of the inner transfer pipe 314 and / or the inner straight section of the inner transfer pipe 312, thereby reducing the impact of the reducing agent on the inner bend of the inner transfer pipe 314 and / or the inner straight section of the inner transfer pipe 312. The inner bend of the inner transfer pipe 314 prevents exhaust gas from passing through the inner bend of the inner transfer pipe 314 to reach the outer bend of the outer transfer pipe 306 and / or the outer straight section of the outer transfer pipe 304. The straight section 312 of the inner transfer pipe prevents exhaust gas from passing through it to reach the curved section 306 and / or the straight section 304 of the outer transfer pipe. In various embodiments, the portion of the exhaust gas flowing within the inner transfer pipe 310 may be approximately equal to 70%, 67%, 65%, 63%, 60%, or other similar values ​​of the total exhaust gas flow rate entering the inlet body inlet 206. In various embodiments, the portion of the exhaust gas flowing within the outer transfer pipe 302 (e.g., between the inner transfer pipe 310 and the outer transfer pipe 310, etc.) may be approximately equal to 40%, 37%, 35%, 32%, 30%, 25%, or other similar values ​​of the total exhaust gas flow rate entering the inlet body inlet 206.

[0141] Exhaust gas flowing within the straight section 312 of the inner delivery pipe flows into the outlet body shell 318, and exhaust gas flowing within the straight section 304 of the outer delivery pipe also flows into the outlet body shell 318. The exhaust gas flowing within the outlet body shell 318 can flow along the inner surface 324 of the outlet body shell, thereby creating a vortex. This vortex can be enhanced by φ1 and φ2, which effectively causes the exhaust gas to flow into the outlet body shell 318 semi-tangentially (e.g., relative to the axial direction, relative to the radial direction, etc.). The exhaust gas flowing within the outlet body shell 318 then flows through the perforated plate 330 and exits the outlet body 320 via the outlet body outlet 326. By flowing through the perforated plate 330, the exhaust gas flow can be straightened, thereby enhancing the uniformity of the exhaust gas flowing to components downstream of the reducing agent delivery system 200 (e.g., SCR catalyst component 108, etc.) of the exhaust gas aftertreatment system 100.

[0142] The inlet body outer mounting housing 210 also includes an inlet body outer mounting housing first sensor coupling mount 336 (e.g., a protrusion, etc.). The inlet body outer mounting housing first sensor coupling mount 336 extends from the outer surface of the inlet body outer mounting housing 210 (e.g., a protrusion, a projection, etc.). Figure 3As shown, the first sensor coupling mount 336 of the inlet body outer mounting shell is centered on an axis extending between the inlet body outer mounting shell steering surface 280 and the inlet body inner shell 226. Furthermore, the first sensor coupling mount 336 is located upstream of the injection port 286. Thus, the sensor coupled to the first sensor coupling mount 336 (e.g., due to its positioning between the inlet body outer mounting shell steering surface 280 and the inlet body inner shell 226, etc.) undergoes a relatively high exhaust flow rate and is substantially isolated from the reducing agent, thereby enabling accurate measurement results to be obtained from the sensor (e.g., because the sensor is not covered by reducing agent deposits, etc.). In other embodiments, the first sensor coupling mount 336 of the inlet body outer mounting shell may be located at other positions.

[0143] The reducing agent delivery system 200 also includes an inlet body outer mounting housing temperature sensor coupler 338. The inlet body outer mounting housing temperature sensor coupler 338 is coupled to an inlet body outer mounting housing first sensor coupler 336 and configured to couple to an upstream temperature sensor 138. The inlet body outer mounting housing first sensor coupler 336 is configured to supply exhaust gas to and / or receive the upstream temperature sensor 138, such that the upstream temperature sensor 138 extends into the inlet body outer mounting housing 210. The upstream temperature sensor 138 can determine the temperature of the exhaust gas before it flows into the outer delivery pipe bend 306 or the inner delivery pipe bend 314.

[0144] The inlet body outer mounting housing 210 also includes a second sensor coupling mounting member 340 (e.g., a protrusion, etc.). The second sensor coupling mounting member 340 extends from the outer surface of the inlet body outer mounting housing 210 (e.g., a protrusion, a projection, etc.). Figure 5 As shown, the inlet body outer mounting housing second sensor coupling mount 340 is centered on an axis extending through the inlet body inlet 206 (e.g., orthogonal to the inlet body inlet plane 248, etc.). The reducing agent delivery system 200 also includes an inlet body outer mounting housing pressure sensor coupling mount 342. The inlet body outer mounting housing pressure sensor coupling mount 342 is coupled to the inlet body outer mounting housing second sensor coupling mount 340 and is configured to be coupled to the pressure sensor 140. The inlet body outer mounting housing second sensor coupling mount 340 is configured to provide exhaust to and / or receive the pressure sensor 140, such that the pressure sensor 140 extends into the inlet body outer mounting housing 210. The pressure sensor 140 can determine the pressure of the exhaust before the exhaust flows into the outer delivery pipe bend 306 or the inner delivery pipe bend 314.

[0145] The outlet body housing 318 also includes an outlet body housing sensor coupling mount 344 (e.g., a protrusion, etc.). The outlet body housing sensor coupling mount 344 extends from the outer surface of the outlet body housing 318 (e.g., a protrusion, a projection, etc.). The outlet body housing sensor coupling mount 344 is centered on an axis extending across the outlet body housing 318. The outlet body housing sensor coupling mount 344 can be positioned such that it is opposite to a target position on the inner surface 324 of the outlet body housing (e.g., depending on the application of the reducing agent delivery system 200, depending on the space requirements of the reducing agent delivery system 200, etc.).

[0146] The reducing agent delivery system 200 also includes an outlet body housing temperature sensor coupler 346. The outlet body housing temperature sensor coupler 346 is coupled to an outlet body housing sensor coupling mount 344 and configured to couple to a downstream temperature sensor 142. The outlet body housing temperature sensor coupler 346 is configured to provide exhaust gas to and / or receive the downstream temperature sensor 142, such that the downstream temperature sensor 142 extends into the outlet body housing 318. The downstream temperature sensor 142 can determine the temperature of the exhaust gas after it flows into the outlet body housing (e.g., via the outer delivery pipe straight section 304, via the inner delivery pipe straight section 312, etc.).

[0147] In various embodiments, the outlet 348 of the inner delivery tube straight section 312 is curved along the radius of the outlet body shell 318. In this way, the inner delivery tube straight section 312 can be positioned so as not to impede the eddies generated within the outlet body shell 318.

[0148] It should be understood that, unlike separate components that are coupled together, the outer mounting shell 210 and the outer transfer shell 216 of the inlet body can also be structurally integrated (e.g., formed by an integral construction).

[0149] IV. Second Example Reducing Agent Delivery System

[0150] Figures 11-19A reducing agent delivery system 1100 according to an example embodiment is shown. In various embodiments, the reducing agent delivery system 1100 is a reducing agent delivery system 102. The reducing agent delivery system 1100 is similar to the reducing agent delivery system 200. The reducing agent delivery system 1100 includes a reducing agent delivery system body 1101 (e.g., a shell, frame, component, etc.). The reducing agent delivery system body 1101 includes an inlet body 1104 (e.g., a shell, frame, component, etc.). The inlet body 1104 includes an inlet body inlet 1106 (e.g., an opening, orifice, etc.). The inlet body inlet 1106 is configured to receive exhaust gas from an exhaust duct system 104. In some embodiments, the reducing agent delivery system 1100 is positioned downstream of a particulate filter 106 such that the inlet body inlet 1106 receives exhaust gas from the particulate filter 106.

[0151] The inlet body 1104 includes an inlet body coupler 1108 (e.g., a body, etc.). The inlet body coupler 1108 intersects with the inlet body inlet 1106. The inlet body coupler 1108 is coupled to the exhaust duct system 104 around the inlet body inlet 1106. In various embodiments, the inlet body coupler 1108 is circular.

[0152] The inlet body 1104 also includes an inlet body outer mounting shell 1110 (e.g., a body, frame, etc.). The inlet body outer mounting shell 1110 includes an inlet body outer mounting shell coupling surface 1112 (e.g., a face, etc.). In various embodiments, the inlet body outer mounting shell coupling surface 1112 is arranged along an arc. The inlet body outer mounting shell coupling surface 1112 contacts the inlet body coupler coupling surface 1114 (e.g., a face, etc.) of the inlet body coupler 1108. In various embodiments, the inlet body coupler coupling surface 1114 is arranged along an arc. In various embodiments, the inlet body outer mounting shell coupling surface 1112 is coupled to the inlet body coupler coupling surface 1114.

[0153] The inlet body 1104 also includes an inlet body outer transfer shell 1116 (e.g., a body, frame, etc.). The inlet body outer transfer shell 1116 includes an inlet body outer transfer shell coupling surface 1118 (e.g., a surface, etc.) that contacts the inlet body coupler coupling surface 1114. In various embodiments, the inlet body outer transfer shell coupling surface 1118 is arranged along an arc. In some embodiments, the inlet body outer mounting shell coupling surface 1112 is arranged along an arc having a first radius, and the inlet body outer transfer shell coupling surface 1118 is arranged along an arc having a first radius. In some embodiments, both the inlet body outer mounting shell coupling surface 1112 and the inlet body outer transfer shell coupling surface 1118 are arranged along the same circle. In various embodiments, the inlet body outer transfer shell coupling surface 1118 is coupled to the inlet body coupler coupling surface 1114.

[0154] The inlet body outer mounting shell 1110 includes an inlet body outer mounting shell mating surface 1120 (e.g., a face, etc.). The inlet body outer mounting shell mating surface 1120 abuts against the inlet body outer mounting shell coupling surface 1112. Similarly, the inlet body outer transfer shell 1116 includes an inlet body outer transfer shell mating surface 1122 (e.g., a face, etc.). The inlet body outer transfer shell mating surface 1122 abuts against the inlet body outer transfer shell coupling surface 1118. In various embodiments, the inlet body outer mounting shell mating surface 1120 is coupled to the inlet body outer mounting shell coupling surface 1112, such that the inlet body outer mounting shell 1110 is coupled to the inlet body outer transfer shell 1116. The inlet body outer mounting shell 1110 and the inlet body outer transfer shell 1116 together define an inlet body cavity 1124 (e.g., a gap, area, space, etc.).

[0155] The inlet body 1104 also includes an inlet body inner shell 1126 (e.g., body, frame, etc.). The inlet body inner shell 1126 is contained within the inlet body cavity 1124. The inlet body inner shell 1126 does not include a flange similar to the first flange 228 or the second flange 232 of the inlet body inner shell. The inlet body inner shell 1126 is separated from the inlet body outer mounting shell inner surface 1128 (e.g., face, etc.) of the inlet body outer mounting shell 1110 and the inlet body outer transfer shell inner surface 1130 (e.g., face, etc.) of the inlet body outer transfer shell 1116. In some embodiments, the inlet body outer mounting shell inner surface 1128 is opposite to the inlet body outer mounting shell coupling surface 1112. In some embodiments, the inlet body outer transfer shell inner surface 1130 is opposite to the inlet body outer transfer shell mating surface 1122.

[0156] The inlet body inner shell 1126 includes an inlet body inner shell wall 1132. The inlet body inner shell 1126 also includes an inlet body inner shell end cap surface 1134. The inlet body inner shell end cap surface 1134 is abutted against the inlet body inner shell wall 1132. The inlet body inner shell end cap surface 1134 is separated from the inlet body outer transfer shell mating surface 1122 and the inlet body outer mounting shell inner surface 1128. As explained in more detail herein, the inlet body inner shell end cap surface 1134 is shaped to match the inlet body outer mounting shell inner surface 1128 and the inlet body outer transfer shell inner surface 1130, such that the gap between the inlet body inner shell end cap surface 1134 and the inlet body outer mounting shell inner surface 1128 is substantially constant along the inlet body outer mounting shell inner surface 1128 and approximately equal to the gap between the inlet body inner shell end cap surface 1134 and the inlet body outer transfer shell inner surface 1130, which is substantially constant along the inlet body outer transfer shell inner surface 1130. In some embodiments, the gap is approximately equal to 8.5 mm.

[0157] The inlet body 1104 also includes a manifold 1136 (e.g., a flange, wall, etc.). The manifold 1136 is at least partially contained within the inner shell wall 1132 of the inlet body. The manifold 1136 includes a manifold coupling surface 1138 (e.g., a surface, etc.). The manifold coupling surface 1138 is coupled to the inner shell wall 1132 of the inlet body. In various embodiments, the manifold coupling surface 1138 is coupled to the inner shell wall 1132 of the inlet body along the length of the manifold coupling surface 1138 (e.g., such that the flow of exhaust gas between the manifold coupling surface 1138 and the inner shell wall 1132 of the inlet body is prohibited, etc.). In other embodiments, the manifold coupling surface 1138 is not coupled to the inlet body inner shell wall 1132 along its length, but rather at one or more locations along the manifold coupling surface 1138 (e.g., to facilitate exhaust flow between the manifold coupling surface 1138 and the inlet body inner shell wall 1132). In various embodiments, the manifold coupling surface 1138 is arranged along an arc. In other embodiments, the manifold coupling surface 1138 is arranged along an elliptical arc.

[0158] The inlet body inlet 1106 is disposed along the inlet body inlet plane 1140. The manifold coupling surface 1138 is separated from the inlet body inlet plane 1140 by a fourth distance D4. In various embodiments, D4 along the manifold coupling surface 1138 is constant (e.g., the manifold coupling surface 1138 is parallel to the inlet body inlet plane 1140, etc.). In some embodiments, D4 is approximately equal to a distance between 5 mm and 29 mm (inclusive). In one embodiment, D4 is approximately equal to 28.6 mm.

[0159] The main inlet 1106 is defined by the main inlet center point 1142 (e.g., centroid, etc.). The manifold 1136 includes a manifold panel 1143 (e.g., face, surface, portion, etc.). The manifold panel 1143 is adjacent to the manifold coupling surface 1138. In various embodiments, the manifold 1143 is parallel to the main inlet plane 1140. In other embodiments, the manifold 1143 is at an angle (e.g., skewed, tilted, etc.) relative to the main inlet plane 1140.

[0160] The manifold panel 1143 includes a manifold opening 1144 (e.g., an aperture, etc.). The manifold opening 1144 is configured to receive exhaust gas from the inlet body inlet 1106. The manifold opening 1144 facilitates the flow of exhaust gas through the manifold panel 1143, rather than around the manifold panel 1143. In various embodiments, the manifold opening 1144 is centered on the inlet body inlet center point 1142. The manifold opening 1144 can be circular, square, triangular, or other similar shapes.

[0161] The inlet body 1104 also includes a distributor tube 1146. The distributor tube 1146 may be cylindrical, triangular prism, square prism, rectangular prism, or other similar shapes. The distributor tube 1146 includes a first end 1148 coupled to a splitter panel 1143 around a splitter opening 1144. The first end 1148 is configured to receive exhaust gas from the splitter opening 1144. The distributor tube 1146 also includes a second end 1150 coupled to an end cap surface 1134 of the inlet body inner shell. The exhaust gas received by the first end 1148 is passed within the distributor tube 1146 toward the second end 1150.

[0162] The distributor tube 1146 also includes more than one distributor tube orifice 1152 (e.g., perforation, opening, hole, etc.). Each distributor tube orifice 1152 is configured to facilitate exhaust flow from the distributor tube 1146 out of the distributor tube 1146. After exiting the distributor tube 1146, the exhaust flows between the splitter plate 1136, the distributor tube 1146, the inlet body inner shell wall 1132, and the inlet body inner shell end cap surface 1134. In various embodiments, at least some of the distributor tube orifices 1152 are located closer to the second end 1150 of the distributor tube than to the first end 1148 of the distributor tube. In some embodiments, at least a majority (e.g., more than half, all, etc.) of the distributor tube orifices 1152 are located closer to the second end 1150 of the distributor tube than to the first end 1148 of the distributor tube. In various embodiments, the diameter of each distributor orifice 1152 is between one-tenth and one-fiftieth of the diameter of the manifold opening 1144, including both one-tenth and one-fiftieth of the diameter of the manifold opening 1144. In some embodiments, the diameter of each distributor orifice 1152 is approximately equal to 6.35 mm. In some embodiments, the diameter of the manifold opening 1144 is approximately equal to 100 mm.

[0163] The manifold panel 1143 also includes a manifold window 1154 (e.g., an opening, orifice, window, etc.). The manifold window 1154 is configured to receive exhaust gas from the inlet body inlet 1106 independently of the manifold opening 1144. The manifold window 1154 facilitates exhaust gas flow through the manifold panel 1143, rather than flowing around the manifold panel 1143. After exiting the manifold window 1154, the exhaust gas flows between the manifold 1136, the distributor tube 1146, the inlet body inner shell wall 1132, and the inlet body inner shell end cap surface 1134.

[0164] In one example embodiment, the manifold window 1154 is shaped similarly to a frustoed sector of a circle centered on the inlet body inlet center point 1142. When measured along the inlet body inlet plane 1140 (e.g., from the inlet body inlet center point 1142, etc.), the manifold window 1154 in this embodiment has a first sector angle S1. In various embodiments, S1 is approximately equal to an angle between 20° and 90° (inclusive) (e.g., 19°, 20°, 25°, 37°, 40°, 45°, 50°, 90°, 91°, etc.). The manifold window 1154 may be adjacent to the manifold opening 1144 and / or the manifold coupling surface 1138. The manifold window 1154 may also not be shaped as a frustoed sector of a circle centered on the inlet body inlet center point 1142, but may be shaped as a frustoed sector of a circle not centered on the inlet body inlet center point 1142. In addition, the manifold window 1154 may not be shaped like a truncated fan, but may be a circle, a square, a triangle or other similar shape.

[0165] The inlet body 1104 also includes a separation panel 1156. The separation panel 1156 is coupled to the manifold panel 1143, the distributor tube 1146, the inlet body inner shell wall 1132, and the inlet body inner shell end cap surface 1134. In various embodiments, the separation panel 1156 is coupled to the manifold panel 1143 along the manifold window 1154. The separation panel 1156 ensures that exhaust gas flowing between the manifold panel 1143, the distributor tube 1146, the inlet body inner shell wall 1132, and the inlet body inner shell end cap surface 1134 must flow through the distributor tube orifice 1152 through the distributor tube 1146, or flow around the distributor tube 1146 via the manifold window 1154.

[0166] The distributor tube 1146 includes a distributor tube panel portion 1158 and a distributor tube delivery portion 1160, each extending between a first end 1148 and a second end 1150 of the distributor tube. None of the distributor tube holes 1152 are located on the distributor tube panel portion 1158 (e.g., the distributor tube holes 1152 are not located on the distributor tube panel portion 1158). Instead, all the distributor tube holes 1152 are located on the distributor tube delivery portion 1160. Therefore, exhaust cannot pass through the distributor tube panel portion 1158. When measured along the inlet body inlet plane 1140 (e.g., from the inlet body inlet center point 1142, etc.), the distributor tube panel portion 1158 is arranged along an arc having a first central angle τ1. Thus, the distributor tube delivery portion 1160 is arranged along an arc with a central angle equal to 360° - τ1. In various embodiments, τ1 is approximately equal to an angle between 20° and 200° (inclusive) (e.g., 19°, 20°, 25°, 37°, 40°, 45°, 50°, 90°, 200°, 201°, etc.). In some embodiments, τ1 is equal to or greater than S1, and the distributor tube panel portion 1158 and / or the splitter window 1154 are positioned such that, when viewed along the inlet body inlet plane 1140, only the distributor tube panel portion 1158 is included within a sector of a circle centered at the inlet body inlet center point 1142 with a diameter equal to the diameter of the distributor tube 1146, wherein the sector angle is equal to S1 (e.g., the distributor tube delivery portion 1160 is not included within this sector).

[0167] The distributor orifice 1152 is separated from the separation panel 1156 by a third separation angle φ3 along a plane parallel to the inlet body inlet plane 1140. In various embodiments, φ3 is less than 10°. When measured along the inlet body inlet plane 1140 (e.g., from the inlet body inlet center point 1142, etc.), the distributor orifice 1152 is distributed within a second sector angle S2. In various embodiments, S2 is approximately equal to an angle between 80° and 180° (inclusive) (e.g., 79°, 80°, 90°, 100°, 140°, 145°, 150°, 180°, 181°, etc.).

[0168] The main entrance 1106 is divided into two by the bisecting plane 1162 of the main body of the reducing agent delivery system. The bisecting plane 1162 of the main body of the reducing agent delivery system divides the main body 1101 of the reducing agent delivery system into two and intersects with the center point 1142 of the main entrance.

[0169] The inlet body inner shell 1126 also includes an inlet body inner shell flow distribution surface 1163 (e.g., a surface, panel, etc.). The inlet body inner shell flow distribution surface 1163 is adjacent to the inlet body inner shell wall 1132. The inlet body inner shell flow distribution surface 1163 is arranged along a plane that is generally parallel to the inlet plane 1140 of the inlet body and is separated from the inlet plane 1140 of the inlet body by a fifth distance D5, approximately as follows. Figure 13 As shown in the figure. In various embodiments, D5 is greater than D4. In some embodiments, D5 is approximately equal to 79 mm, and D4 is approximately equal to 29 mm.

[0170] The inlet body outer mounting shell 1110 also includes an inlet body outer mounting shell flow distribution surface 1164 (e.g., a face, panel, etc.). The inlet body outer mounting shell flow distribution surface 1164 is adjacent to the inner surface 1128 of the inlet body outer mounting shell. The inlet body outer mounting shell flow distribution surface 1164 is disposed along a plane substantially parallel to the inlet plane 1140 of the inlet body, and is separated from the inlet plane 1140 of the inlet body by a sixth distance D6, approximately as follows. Figure 13 As shown in the diagram, D6 is greater than D5, and the inlet body outer shell diversion surface 1164 is spaced apart from the inlet body inner shell diversion surface 1163 (e.g., separated, etc.). In various embodiments, D6 is greater than D4.

[0171] The inlet body inner shell 1126 also includes an inlet body inner shell protruding surface 1165 (e.g., a face, panel, etc.). The inlet body inner shell protruding surface 1165 is adjacent to the inlet body inner shell wall 1132 and the inlet body inner shell diversion surface 1163.

[0172] The inlet body outer mounting shell 1110 also includes an inlet body outer mounting shell protruding surface 1166 (e.g., a face, panel, etc.). The inlet body outer mounting shell protruding surface 1166 is adjacent to the inlet body outer mounting shell inner surface 1128 and the inlet body outer mounting shell diversion surface 1164. The inlet body outer mounting shell protruding surface 1166 is spaced apart from the inlet body inner shell protruding surface 1165.

[0173] The inlet body outer mounting housing 1110 also includes an inlet body outer mounting housing recess 1168 (e.g., a depression). The inlet body outer mounting housing recess 1168 is opposite to the inlet body outer mounting housing flow distribution surface 1164. The inlet body outer mounting housing recess 1168 includes an inlet body outer mounting housing outer mounting surface 1170 (e.g., a face, panel, etc.). The inlet body outer mounting housing outer mounting surface 1170 is opposite to the inlet body outer mounting housing flow distribution surface 1164.

[0174] The inlet body inner shell 1126 also includes an inlet body inner shell recess 1167 (e.g., a depression). The inlet body inner shell recess 1167 is opposite to the inlet body inner shell flow distribution surface 1163. The inlet body inner shell recess 1167 includes an inlet body inner shell outer mounting surface 1171 (e.g., a face, panel, etc.). The inlet body inner shell outer mounting surface 1171 is opposite to the inlet body inner shell flow distribution surface 1163. The inlet body inner shell outer mounting surface 1171 is spaced apart from the inlet body outer mounting shell outer mounting surface 1170.

[0175] The inlet body outer mounting housing 1110 includes an external injection port 1172 (e.g., an opening, hole, window, etc.). The external injection port 1172 extends through the outer mounting surface 1170 and the diversion surface 1164 of the inlet body outer mounting housing. The external injection port 1172 is configured to receive an injection mount 1174 (e.g., a mounting plate, etc.). The injection mount 1174 is configured to couple to the dispensing module 112 and / or the injector 120 such that the dispensing module 112 and / or the injector 120 are positioned to provide reducing agent to the inlet body outer mounting housing 1110 via the external injection port 1172. The outer mounting surface 1170 of the inlet body outer mounting housing is generally planar and facilitates coupling of the injection mount 1174 in various orientations to accommodate various configurations of the dispensing module 112 and / or the injector 120.

[0176] The inlet body inner shell 1126 also includes an inner injection port 1173. The inner injection port 1173 extends through the outer mounting surface 1171 of the inlet body inner shell and the flow distribution surface 1163 of the inlet body inner shell. The inner injection port 1173 is configured to receive an injection mount 1174 (e.g., a mounting plate, etc.). The injection mount 1174 extends between the outer mounting shell 1110 of the inlet body and the inner shell 1126 of the inlet body. The outer mounting surface 1171 of the inlet body inner shell is generally planar and facilitates coupling of the injection mount 1174 in various orientations to accommodate various configurations of the dispensing module 112 and / or the injector 120.

[0177] The inlet body inner shell 1126 also includes more than one inlet body inner shell hole 1175 (e.g., perforation, opening, hole, etc.) disposed on the end cap surface 1134 of the inlet body inner shell surrounding the distributor tube 1146. Each inlet body inner shell hole 1175 is configured to facilitate exhaust from between the inlet body inner shell 1126 and the inlet body outer mounting shell 1110 and / or from between the inlet body inner shell 1126 and the inlet body outer transfer shell 1116 into the inlet body inner shell 1126.

[0178] The inlet body inner shell aperture 1175 is separated from the separation panel 1156 by a fourth separation angle φ4 along a plane parallel to the inlet body inlet plane 1140. In various embodiments, φ4 is greater than 10°. φ4 may be greater than φ3. In some embodiments, φ4 is approximately equal to between 90% and 110% of φ3. When measured along the inlet body inlet plane 1140 (e.g., from the inlet body inlet center point 1142, etc.), the inlet body inner shell aperture 1175 is distributed within a third sector angle S3. In various embodiments, S3 is approximately equal to an angle between 80° and 180° (inclusive) (e.g., 79°, 80°, 90°, 100°, 140°, 145°, 150°, 180°, 181°, etc.).

[0179] At least some of the inlet body inner shell holes 1175 are aligned with at least some of the distributor tube holes 1152. In various embodiments, at least some of the inlet body inner shell holes 1175 are located closer to the second end 1150 of the distributor tube than to the inlet body inner shell wall 1132. In various embodiments, the diameter of each inlet body inner shell hole 1175 is between one-tenth and one-fiftieth of the diameter of the manifold opening 1144, including one-tenth and one-fiftieth of the diameter of the manifold opening 1144. In some embodiments, the diameter of each inlet body inner shell hole 1175 is approximately equal to 6.35 mm.

[0180] In various embodiments, the inlet body 1104 also includes a shield assembly 1133 (e.g., a cover, etc.). The shield assembly 1133 is similar to the shield assembly 290. The shield assembly 1133 is disposed along the inlet body outer mounting shell diversion surface 1164 and is configured to partially shield the reducing agent supplied through the outer injection port 1172 from the exhaust gas. The shield assembly 1133 includes a shield flange 1135 (e.g., a strip, etc.). The shield flange 1135 is similar to the shield flange 292. The shield flange 1135 is coupled to the inlet body outer mounting shell diversion surface 1164 around the outer injection port 1172 and to the inlet body inner shell outer mounting surface 1171 around the inner injection port 1173. The shield flange 1135 extends around the inner injection port 1173. The shield assembly 1133 also includes a shield guide 1137 (e.g., a fin, wall, barrier, etc.). The shield guide 1137 is similar to the shield guide 295. The shield guide 1137 is coupled to the inlet body inner shell 1126 and the shield flange 1135. A shield inlet 1139 (e.g., a hole, window, aperture, etc.) similar to the shield inlet 296 can be formed between the shield flange 1135, the shield guide 1137, the inlet body inner shell 1126 (e.g., surrounding the inner injection port 1173, etc.), and the inner surface 1128 of the inlet body outer mounting shell. The shield inlet 1139 can receive and supply exhaust gas to the shield assembly 1133, and thus surround the inner injection port 1173. This exhaust gas can help propel the reducing agent away from the separation panel 1156 and around the distributor tube 1146. The shroud guide 1137 guides a portion of the exhaust gas flowing between the inner wall 1132 of the inlet body and the inner surface 1128 of the outer mounting shell of the inlet body, and / or between the inner wall 1132 of the inlet body and the inner surface 1128 of the outer delivery shell of the inlet body, into the shroud inlet 1139. The shroud assembly 1133 also includes a shroud outlet 1141. The shroud outlet 1141 is similar to the shroud outlet 297. The shroud outlet 1141 is an internal injection port 1173. Exhaust gas can exit the shroud assembly 1133 via the shroud outlet 1141 (e.g., after a reducing agent has been provided to the exhaust gas, etc.). The shroud assembly 1133 may also include a shroud plate (e.g., a cover, etc.) similar to shroud plate 294. The shroud plate may be coupled to the shroud flange 1135 and the inner shell 1126 of the inlet body, but not to the outer mounting shell 1110 of the inlet body.

[0181] The inlet body outer transfer housing 1116 includes an inlet body outer transfer housing outlet 1176 (e.g., a hole, opening, etc.). The inlet body outer transfer housing outlet 1176 extends through the inner surface 1130 of the inlet body outer transfer housing and is adjacent to the inner wall 1132 of the inlet body. In various embodiments, the inlet body outer transfer housing outlet 1176 is elliptical. In other embodiments, the inlet body outer transfer housing outlet 1176 is circular, square, rectangular, or other similar shapes.

[0182] The inlet body inner shell 1126 also includes an inlet body inner shell outlet 1178 (e.g., a hole, opening, etc.). The inlet body inner shell outlet 1178 extends through the inlet body inner shell wall 1132 and is adjacent to the inlet body outer transfer shell outlet 1176. In various embodiments, the inlet body inner shell outlet 1178 and the inlet body outer transfer shell outlet 1176 are concentric (e.g., concentric ellipses, concentric circles, etc.). In various embodiments, the inlet body inner shell outlet 1178 is elliptical. In other embodiments, the inlet body inner shell outlet 1178 is circular, square, rectangular, or other similar shapes.

[0183] The reducing agent delivery system body 1101 also includes an inner delivery pipe 1180 (e.g., conduit, tubing, connector, etc.). The inner delivery pipe 1180 is coupled to the outer delivery shell 1116 of the inlet body surrounding the outlet 1176 of the outer delivery shell of the inlet body. The inner delivery pipe 1180 includes a straight portion 1182 and a curved portion 1184. The straight portion 1182 is adjacent to the curved portion 1184 and is separated from the outer delivery shell 1116 of the inlet body by the curved portion 1184. The curved portion 1184 gradually curves from the straight portion 1182 toward the outer delivery shell 1116 of the inlet body to facilitate (e.g., due to the circular shape of the outer delivery shell 1116 of the inlet body) a flush fit between the curved portion 1184 and the outer delivery shell 1116 of the inlet body.

[0184] The straight portion 1182 of the inner transfer tube is centered on the central axis 1186 of the inner transfer tube. The central axis 1186 of the inner transfer tube extends through the outer transfer shell outlet 1176 of the inlet body and the inner shell outlet 1178 of the inlet body, and intersects with the inner shell 1126 of the inlet body. In various embodiments, the straight portion 1182 of the inner transfer tube has an elliptical cross-section along a plane orthogonal to the inlet body inlet plane 1140, intersecting with the central axis 1186 of the inner transfer tube and intersecting with the bisecting plane 1162 of the reducing agent delivery system body. In other embodiments, the straight portion 1182 of the inner transfer tube has a circular, square, rectangular or other similar shaped cross-section along a plane orthogonal to the inlet body inlet plane 1140, intersecting with the central axis 1186 of the inner transfer tube and intersecting with the bisecting plane 1162 of the reducing agent delivery system body.

[0185] The central axis 1186 of the inner delivery tube is separated from the main body of the reducing agent delivery system by a fifth separation angle φ5 along a plane parallel to the inlet plane 1140 of the inlet body. In various embodiments, φ5 is less than or approximately equal to 50°. In various embodiments, φ5 is approximately equal to 33°.

[0186] The straight portion 1182 of the inner delivery tube is coupled to the outlet body shell 1188 (e.g., body, frame, etc.) of the outlet body 1190 (e.g., shell, frame, assembly, etc.) of the reducing agent delivery system body 1101. Specifically, the straight portion 1182 of the inner delivery tube is coupled to the outlet body shell 1188 around the outlet body shell inlet 1192 (e.g., hole, opening, etc.). In various embodiments, the inlet body 1104 is coupled to the outlet body 1190 only through the inner delivery tube 1180. The outlet body shell inlet 1192 extends through the outlet body shell inner surface 1194 (e.g., face, etc.) of the outlet body shell 1188. In various embodiments, the outlet body shell inlet 1192 is elliptical. In other embodiments, the outlet body shell inlet 1192 is circular, square, rectangular, or other similar shapes.

[0187] The relationship between the outlet body shell inlet 1192, the inlet body outer conveying shell outlet 1176, and the inlet body inner shell outlet 1178 makes the reducing agent delivery system 1100 approximately Z-shaped or approximately S-shaped. This shape allows the exhaust gas to travel a longer time within the inner conveying pipe 1180 over the same distance between the inlet body 1104 and the outlet body 1190 (e.g., between the center point of the inlet body 1104 and the center point of the outlet body 1190, etc.).

[0188] The outlet body 1190 does not include an inner shell similar to the inlet body inner shell 1126 or a splitter similar to the splitter 1136. However, the outlet body 1190 includes an outlet body outlet 1196 (e.g., an opening, orifice, etc.). The outlet body outlet 1196 is configured to supply exhaust gas to the exhaust duct system 104. In some embodiments, the reductant delivery system 1100 is positioned upstream of the SCR catalyst member 108 such that the SCR catalyst member 108 receives exhaust gas from the outlet body outlet 1196.

[0189] The outlet body 1190 also includes an outlet body coupler 1198 (e.g., a body, etc.). The outlet body coupler 1198 intersects with the outlet body outlet 1196. The outlet body coupler 1198 is coupled to the exhaust duct system 104 around the outlet body outlet 1196. In various embodiments, the outlet body coupler 1198 is circular.

[0190] The outlet body 1190 also includes a perforated plate 1200 (e.g., a wall, flange, etc.). The perforated plate 1200 extends across the diameter of the outlet body housing 1188. The perforated plate 1200 includes a perforated plate coupling surface 1202 (e.g., a surface, etc.). In various embodiments, the perforated plate coupling surface 1202 is arranged in a circular shape. In other embodiments, the perforated plate coupling surface 1202 is arranged in an elliptical shape.

[0191] The perforated plate 1200 also includes more than one perforated plate perforation 1204 (e.g., hole, opening, aperture, etc.). The perforated plate 1200 is coupled to the outlet body housing 1188 such that exhaust flowing from the outlet body outlet 1196 first passes through the perforated plate 1200 via one of the perforated plate perforations 1204 (e.g., so that no exhaust can bypass the perforated plate 1200, etc.).

[0192] The outlet body 1190 also includes a first guide 1206 and a second guide 1208. The first guide 1206 and the second guide 1208 extend within the outlet body housing 1188 and toward the inner delivery pipe 1180. The first guide 1206 and the second guide 1208 are each coupled to at least one of the inner surface 1194 of the outlet body housing, the perforated plate 1200, or the inner delivery pipe 1180 (e.g., the straight portion 1182 of the inner delivery pipe, etc.).

[0193] The first guide vane 1206 is disposed along a plane substantially parallel to the plane along which the outlet body shell end cap 1207 of the outlet body shell 1188 is disposed. In various embodiments, the first guide vane 1206 is separated from the outlet body shell end cap 1207 along its disposed plane by a seventh distance D7. In some embodiments, D7 is 8.5 mm. In other embodiments, D7 is approximately equal to a distance between 0 mm and 10 mm (inclusive). When D7 is greater than 0 mm, some exhaust flows around the first guide vane 1206 and thereby bypasses the first guide vane 1206. Thus, the back pressure of the reducing agent delivery system 1100 can be reduced, and the distribution of the reducing agent in the exhaust leaving the reducing agent delivery system 1100 can be more satisfactory.

[0194] The second guide vane 1208 is disposed along a plane substantially parallel to the plane along which the outlet body shell end cap 1207 is disposed. In various embodiments, the first guide vane 1206 is separated from the outlet body shell end cap 1207 along its disposed plane by an eighth distance D8. In some embodiments, D8 is 8.5 mm. In other embodiments, D8 is approximately equal to a distance between 0 mm and 10 mm (inclusive). In various embodiments, D8 is approximately equal to D7. When D8 is greater than 0 mm, some exhaust flows around the second guide vane 1208 and thereby bypasses the second guide vane 1208. Thus, the back pressure of the reducing agent delivery system 1100 can be reduced, and the distribution of the reducing agent in the exhaust leaving the reducing agent delivery system 1100 can be more satisfactory.

[0195] The first flow guide 1206 includes a straight portion 1210 and a curved portion 1212. The straight portion 1210 is adjacent to the curved portion 1212. The straight portion 1210 separates the curved portion 1212 from the inner delivery tube 1180. In various embodiments, the straight portion 1210 extends within the inner delivery tube 1180 and the outlet body shell 1188, and the curved portion 1212 extends only within the outlet body shell 1188 (e.g., the curved portion 1212 does not extend into the inner delivery tube 1180, etc.).

[0196] The straight portion 1210 of the first flow guide is centered on the central axis 1214 of the first flow guide. The central axis 1214 of the first flow guide extends through the outlet body shell inlet 1192 and the inner delivery pipe 1180. In various embodiments, the central axis 1214 of the first flow guide further extends through the inlet body outer delivery shell outlet 1176 and the inlet body inner shell outlet 1178, and intersects with the inlet body inner shell 1126.

[0197] The central axis 1214 of the first guide vane is separated from the main body of the reducing agent delivery system by a sixth separation angle φ6 along a plane parallel to the inlet plane 1140 of the inlet body. In various embodiments, φ6 is less than or approximately equal to 50°. In some embodiments, φ6 is equal to φ5, such that the central axis 1186 of the inner delivery tube is parallel to the central axis 1214 of the first guide vane. In various embodiments, φ6 is approximately equal to 33°.

[0198] The first guide vane curved portion 1212 gradually bends from the straight portion 1210 of the first guide vane toward the bisecting plane 1162 of the reducing agent delivery system body, and may extend through and beyond the bisecting plane 1162 of the reducing agent delivery system body. At least a portion of the first guide vane curved portion 1212 bends about the central axis 1216 of the first guide vane curved portion. The central axis 1216 of the first guide vane curved portion extends through the inlet plane 1140 of the inlet body. The first guide vane curved portion 1212 is defined by a third arc length β3 along a plane orthogonal to the central axis 1216 of the first guide vane curved portion and along which the central axis 1214 of the first guide vane extends.

[0199] The first guide vane 1206 receives exhaust gas from the inner delivery pipe 1180 and gradually rotates the exhaust gas within the outlet body 1190 and upstream of the perforated plate 1200. This rotation enhances the mixing of the reducing agent and the exhaust gas within the outlet body 1190. Furthermore, this rotation increases heat transfer to the reducing agent, thereby increasing its decomposition and mitigating impact on the various surfaces of the reducing agent delivery system 1100. Additionally, the rotation reduces the back pressure of the reducing agent delivery system 1100 because the momentum of the exhaust gas leaving the inner delivery pipe 1180 is gradually released during the rotation of the exhaust gas within the outlet body 1190 caused by the first guide vane 1206. By selecting φ6 and β3, the rotation provided by the first guide vane 1206 can be customized for the target application.

[0200] The second guide vane 1208 includes a straight portion 1220 and a curved portion 1222. The straight portion 1220 is adjacent to the curved portion 1222. The straight portion 1220 separates the curved portion 1222 from the inner delivery tube 1180. In various embodiments, the straight portion 1220 extends within the inner delivery tube 1180 and the outlet body shell 1188, and the curved portion 1222 extends only within the outlet body shell 1188 (e.g., the curved portion 1222 does not extend into the inner delivery tube 1180, etc.).

[0201] The straight portion 1220 of the second guide is centered on the central axis 1224 of the second guide. The central axis 1224 of the second guide extends through the outlet body shell inlet 1192 and the inner conveying pipe 1180. In various embodiments, the central axis 1224 of the second guide further extends through the inlet body outer conveying shell outlet 1176 and the inlet body inner shell outlet 1178, and intersects with the inlet body inner shell 1126.

[0202] The central axis 1224 of the second guide vane is separated from the bisecting plane 1162 of the reducing agent delivery system body by a seventh separation angle φ7 along a plane parallel to the inlet body inlet plane 1140. In various embodiments, φ7 is less than or approximately equal to 50°. In some embodiments, φ7 is equal to φ5, such that the central axis 1186 of the inner delivery tube and the central axis 1224 of the second guide vane are parallel. In some embodiments, φ7 is equal to φ6, such that the central axis 1214 of the first guide vane and the central axis 1224 of the second guide vane are parallel. In various embodiments, φ7 is approximately equal to 33°.

[0203] The second guide bend 1222 gradually bends from the straight portion 1220 of the second guide towards the bisecting plane 1162 of the reducing agent delivery system body, and may extend through and beyond the bisecting plane 1162 of the reducing agent delivery system body. At least a portion of the second guide bend 1222 bends about the central axis 1226 of the second guide bend. The central axis 1226 of the second guide bend extends through the inlet plane 1140 of the inlet body. In some embodiments, the central axis 1226 of the second guide bend is parallel to the central axis 1216 of the first guide bend. The second guide bend 1222 is defined by a fourth arc length β4 along a plane orthogonal to the central axis 1226 of the second guide bend and along which the central axis 1224 of the second guide extends. In some embodiments, β4 is approximately equal to β3.

[0204] The second guide vane 1208 receives exhaust gas from the inner delivery pipe 1180 and gradually rotates the exhaust gas within the outlet body 1190 and upstream of the perforated plate 1200. This rotation enhances the mixing of the reducing agent and the exhaust gas within the outlet body 1190. Furthermore, this rotation increases heat transfer to the reducing agent, thereby increasing its decomposition and mitigating impact on the various surfaces of the reducing agent delivery system 1100. Additionally, this rotation reduces the back pressure of the reducing agent delivery system 1100 because the momentum of the exhaust gas leaving the inner delivery pipe 1180 is gradually released during the rotation of the exhaust gas within the outlet body 1190 caused by the second guide vane 1208. By selecting φ7 and β4, the rotation provided by the second guide vane 1208 can be customized for the target application.

[0205] The reducing agent can impact the first deflector 1206 and / or the second deflector 1208. However, since the first deflector 1206 and the second deflector 1208 are immersed in the exhaust gas (e.g., the exhaust gas flows in front of and behind the first deflector 1206, and in front of and behind the second deflector 1208), the first deflector 1206 and the second deflector 1208 can be heated to a relatively high temperature by the exhaust gas. This heating promotes the decomposition of the reducing agent impacting the first deflector 1206 and / or the second deflector 1208.

[0206] In operation, exhaust gas (e.g., from exhaust duct system 104, etc.) flows into inlet body inlet 1106. As described herein, the exhaust gas flowing through reducing agent delivery system 1100 is guided, diverted, and separated in various ways to promote enhanced mixing and decomposition of the reducing agent in the exhaust gas and to mitigate the impact of the reducing agent on the various surfaces of reducing agent delivery system 1100. In these ways, reducing agent delivery system 1100 may be more desirable than other systems that do not include similar mechanisms in enhancing the mixing and decomposition of the reducing agent in the exhaust gas and mitigating the impact of the reducing agent (e.g., due to additional cleaning of reducing agent deposits in these systems, etc.).

[0207] A first portion of the exhaust flows through the manifold window 1154 and between the manifold panel 1143, the split panel 1156, the distributor tube panel portion 1158, the inlet body inner shell end cap surface 1134, the inlet body inner shell split surface 1163, and the inlet body inner shell protruding surface 1165, and subsequently flows along the inlet body inner shell split surface 1163, the inlet body inner shell protruding surface 1165, and / or the inlet body inner shell end cap surface 1134 and around the delivery tube 1146. As the exhaust flows around the delivery tube 1146, it causes the exhaust to form vortices (e.g., about an axis extending through the inlet body inlet center point 1142 and orthogonal to the inlet body inlet plane 1140). Then, the first portion of the exhaust flows into the inner delivery tube bend portion 1184 via the inlet body inner shell outlet 1178.

[0208] Before flowing into the curved section 1184 of the inner delivery pipe, a reducing agent is supplied to the first part of the exhaust gas through the outer injection port 1172 and the inner injection port 1173. The reducing agent mixes with the first part of the exhaust gas, and causes the reducing agent and the first part of the exhaust gas to form a vortex around the delivery pipe 1146.

[0209] The injection auxiliary portion of the exhaust gas in the first section can flow into the shroud assembly via a shroud inlet (e.g., between the shroud plate, shroud flange, and the protruding surface of the inlet body outer mounting shell, etc.). The injection auxiliary portion of the exhaust gas can provide reducing agent via an outer injection port 1172 and an inner injection port 1173 (e.g., from the injector 120 and / or dispensing module 112). The injection auxiliary portion of the exhaust gas in the first section can then exit the shroud assembly via a shroud outlet. The injection auxiliary portion of the exhaust gas can help propel the reducing agent around the delivery pipe 1146. Specifically, the shroud assembly can protect the flow of exhaust gas and reducing agent away from the inlet body inner shell end cap surface 1134 from the influence of exhaust gas flow toward the inlet body inner shell end cap surface 1134, thereby allowing additional reducing agent to be provided to the inner delivery pipe bend 1184 (e.g., instead of being pushed against the inlet body inner shell end cap surface 1134, etc.). In various embodiments, the injection assistance portion may be approximately equal to 5%, 4%, 3%, 2% or other similar values ​​of the total exhaust flow rate entering the inlet body inlet 1106.

[0210] Unlike the exhaust flowing through the manifold window 1154, the second portion of the exhaust flows through the manifold opening 1144 and enters the delivery pipe 1146. The second portion of the exhaust flows from the first end 1148 of the delivery pipe to the second end 1150 of the delivery pipe. Then, the second portion of the exhaust leaves the delivery pipe 1146 through the delivery pipe hole 1152 and merges with the first portion of the exhaust between the manifold panel 1143, the separator plate 1156, the distributor pipe panel portion 1158, the inlet body inner shell end cap surface 1134, the inlet body inner shell diversion surface 1163, and the inlet body inner shell protruding surface 1165.

[0211] Because it is separated from the manifold window 1154, the second part of the exhaust merges with the first part of the exhaust after the first part of the exhaust has begun to rotate. Thus, the rotation of the first part of the exhaust is not significantly reduced due to the introduction of the second part of the exhaust into the first part of the exhaust. Furthermore, at least some of the transfer pipe holes 1152 can be aligned with the inlet body inner shell outlet 1178. Thus, the second part of the exhaust leaving these transfer pipe holes 1152 can push the exhaust toward the inlet body inner shell outlet 1178. The positions of the transfer pipe holes 1152 are selected such that the exhaust leaving each transfer pipe hole 1152 does not substantially change the exhaust vortex with respect to the transfer pipe 1146. Furthermore, the exhaust flowing within the transfer pipe 1146 (e.g., compared to exhaust that has already been mixed with a reducing agent) is relatively hot. Thus, the impact of the reducing agent on the transfer pipe 1146 is mitigated.

[0212] Unlike the exhaust flowing through the manifold window 1154 or the exhaust flowing through the manifold opening 1144, the third portion of the exhaust flows between the inner surface 1128 of the outer mounting shell of the inlet body and the inner shell wall 1132 of the inlet body (e.g., between the outer mounting shell 1110 and the inner shell 1126 of the inlet body, etc.) and between the inner surface 1130 of the outer conveying shell of the inlet body and the inner shell wall 1132 of the inlet body (e.g., between the outer conveying shell 1116 and the inner shell 1126 of the inlet body, etc.). The exhaust produces flow along the inner shell wall 1132 of the inlet body, which reduces the impact of the reducing agent on the inner shell wall 1132 of the inlet body (e.g., heating of the inner shell wall 1132 of the inlet body due to the relatively hot exhaust).

[0213] Some of the third portion of the exhaust flows through the inlet body inner shell bore 1175 and enters the inlet body inner shell 1126. Furthermore, the exhaust flowing between the inner surface 1128 of the outer mounting shell of the inlet body and the inner shell wall 1132 of the inlet body (e.g., compared to exhaust already mixed with the reducing agent, etc.) is relatively hot. This reduces the impact of the reducing agent on the inner shell wall 1132 of the inlet body. In various embodiments, at least some of the inlet body inner shell bores 1175 are aligned with at least some of the transfer pipe bores 1152 (e.g., when viewed along the plane in which the transfer pipe bore 1152 is disposed, the central axis of the inlet body inner shell bore 1175 extends across the transfer pipe bore 1152, etc.). Thus, the exhaust gas flowing out from the aligned inlet body inner shell hole 1175 and the exhaust gas flowing out from the delivery pipe hole 1152 mix and can be guided cooperatively toward the inlet body inner shell outlet 1178. Consequently, the back pressure of the reducing agent delivery system 1100 can be reduced.

[0214] Some exhaust gas flowing between the inner surface 1128 of the outer casing of the inlet body and the inner casing wall 1132 of the inlet body can be guided into the inlet of the casing by the casing guide.

[0215] The exhaust gas flowing within the curved portion 1184 of the inner transfer pipe flows towards the straight portion 1182 of the inner transfer pipe. The exhaust gas flowing within the straight portion 1182 of the inner transfer pipe flows into the outlet body shell 1188. The exhaust gas flowing within the outlet body shell 1188 can flow along the inner surface 1194 of the outlet body shell, thereby creating a vortex in the exhaust gas. This vortex can be enhanced by φ5, which effectively causes the exhaust gas to flow into the outlet body shell 1188 semi-tangentially (e.g., relative to the axial direction, relative to the radial direction, etc.).

[0216] A first portion of the exhaust gas flowing from the straight section 1182 of the inner delivery pipe flows between the straight section 1210 of the first guide tube and the inner surface 1194 of the straight section 1182 of the inner delivery pipe and / or the outlet body shell. This portion of the exhaust gas enters the outlet body shell 1188 semi-tangentially due to φ6 and is guided along the straight section 1210 of the first guide tube to the curved section 1212 of the first guide tube. The curved section 1212 of the first guide tube causes this portion of the exhaust gas to subsequently form a vortex within the outlet body shell 1188.

[0217] A second portion of the exhaust gas flowing out from the straight section 1182 of the inner delivery pipe flows between the straight section 1210 and the straight section 1220 of the first guide vane. This portion of the exhaust gas enters the outlet body shell 1188 semi-tangentially due to φ7 and is guided along the straight section 1220 of the second guide vane to the curved section 1222 of the second guide vane. The curved section 1222 of the second guide vane causes this portion of the exhaust gas to subsequently form a vortex within the outlet body shell 1188.

[0218] Then, the exhaust gas flowing within the outlet body housing 1188 flows through the perforated plate 1200 and exits the outlet body 1190 via the outlet body outlet 1196. By flowing through the perforated plate 1200, the exhaust gas flow can be straightened, thereby enhancing the uniformity of the exhaust gas flowing to components downstream of the reducing agent delivery system 1100 (e.g., SCR catalyst component 108, etc.) of the exhaust aftertreatment system 100.

[0219] The inlet body outer mounting housing 1110 may further include an inlet body outer mounting housing first sensor coupling mount (e.g., a protrusion, etc.). The inlet body outer mounting housing first sensor coupling mount can extend from the outer surface of the inlet body outer mounting housing 1110 (e.g., a protrusion, a projection, etc.). The inlet body outer mounting housing first sensor coupling mount can be located upstream of the outer injection port 1172. Thus, the sensor coupled to the inlet body outer mounting housing first sensor coupling mount can withstand relatively high exhaust flow rates and can be substantially isolated from the reducing agent, thereby enabling accurate measurement results to be obtained from the sensor (e.g., because the sensor is not covered by reducing agent deposits, etc.). In other embodiments, the inlet body outer mounting housing first sensor coupling mount can be located at other locations.

[0220] The reducing agent delivery system 1100 may further include an inlet body outer housing temperature sensor coupler. The inlet body outer housing temperature sensor coupler may be coupled to an inlet body outer housing first sensor coupler and is configured to be coupled to an upstream temperature sensor 138. The inlet body outer housing first sensor coupler may be configured to supply exhaust gas to and / or receive the upstream temperature sensor 138, such that the upstream temperature sensor 138 extends into the inlet body outer housing 1110. The upstream temperature sensor 138 may determine the temperature of the exhaust gas before it flows into the inner delivery pipe bend 1184.

[0221] The inlet body outer mounting housing 1110 may further include an inlet body outer mounting housing second sensor coupling mount (e.g., a protrusion, etc.). The inlet body outer mounting housing second sensor coupling mount may extend from the outer surface of the inlet body outer mounting housing 1110 (e.g., a protrusion, a projection, etc.). The inlet body outer mounting housing second sensor coupling mount may be centered on an axis extending through the inlet body inlet 1106 (e.g., orthogonal to the inlet body inlet plane 1140, etc.). The reducing agent delivery system 1100 may further include an inlet body outer mounting housing pressure sensor coupling. The inlet body outer mounting housing pressure sensor coupling may be coupled to the inlet body outer mounting housing second sensor coupling mount and is configured to be coupled to pressure sensor 140. The inlet body outer mounting housing second sensor coupling mount may be configured to provide exhaust to and / or receive pressure sensor 140, such that pressure sensor 140 extends into the inlet body outer mounting housing 1110. Pressure sensor 140 may determine the pressure of the exhaust before the exhaust flows into the inner delivery pipe bend 1184.

[0222] The outlet housing 1188 may also include an outlet housing sensor coupling mount (e.g., a protrusion, etc.). The outlet housing sensor coupling mount may extend from the outer surface of the outlet housing 1188. The outlet housing sensor coupling mount may be centered on an axis extending across the outlet housing 1188. The outlet housing sensor coupling mount may be positioned such that it is opposite to a target position on the inner surface 1194 of the outlet housing (e.g., depending on the application of the reducing agent delivery system 1100, depending on the space requirements of the reducing agent delivery system 1100, etc.).

[0223] The reducing agent delivery system 1100 may further include an outlet body housing temperature sensor coupler. The outlet body housing temperature sensor coupler is coupled to an outlet body housing sensor coupling mount and configured to couple to a downstream temperature sensor 142. The outlet body housing temperature sensor coupler may be configured to provide exhaust gas to and / or receive the downstream temperature sensor 142, such that the downstream temperature sensor 142 extends into the outlet body housing 1188. The downstream temperature sensor 142 can determine the temperature of the exhaust gas after it (e.g., via the straight section 1182 of the inner delivery pipe, etc.) flows into the outlet body housing.

[0224] It should be understood that, unlike the separate components that are coupled together, the outer mounting shell 1110 and the outer transfer shell 1116 of the inlet body can also be structurally integrated (e.g., formed by an integral construction).

[0225] V. Third example of a reducing agent delivery system

[0226] Figures 20-28 A reducing agent delivery system 1900 according to an example embodiment is shown. In various embodiments, the reducing agent delivery system 1900 is a reducing agent delivery system 102. The reducing agent delivery system 1900 is similar to the reducing agent delivery system 200. The reducing agent delivery system 1900 includes a reducing agent delivery system body 1901 (e.g., a shell, frame, component, etc.). The reducing agent delivery system body 1901 includes an inlet body 1904 (e.g., a shell, frame, component, etc.). The inlet body 1904 includes an inlet body inlet 1906 (e.g., an opening, orifice, etc.). The inlet body inlet 1906 is configured to receive exhaust gas from an exhaust duct system 104. In some embodiments, the reducing agent delivery system 1900 is positioned downstream of a particulate filter 106 such that the inlet body inlet 1906 receives exhaust gas from the particulate filter 106.

[0227] The inlet body 1904 includes an inlet body coupler 1908 (e.g., a body, etc.). The inlet body coupler 1908 intersects with the inlet body inlet 1906. The inlet body coupler 1908 is coupled to the exhaust duct system 104 around the inlet body inlet 1906. In various embodiments, the inlet body coupler 1908 is circular.

[0228] The inlet body 1904 also includes an inlet body outer mounting shell 1910 (e.g., a body, frame, etc.). The inlet body outer mounting shell 1910 includes an inlet body outer mounting shell coupling surface 1912 (e.g., a face, etc.). In various embodiments, the inlet body outer mounting shell coupling surface 1912 is arranged along an arc. The inlet body outer mounting shell coupling surface 1912 contacts the inlet body coupler coupling surface 1914 (e.g., a face, etc.) of the inlet body coupler 1908. In various embodiments, the inlet body coupler coupling surface 1914 is arranged along an arc. In various embodiments, the inlet body outer mounting shell coupling surface 1912 is coupled to the inlet body coupler coupling surface 1914.

[0229] The inlet body 1904 also includes an inlet body outer transfer shell 1916 (e.g., a body, frame, etc.). The inlet body outer transfer shell 1916 includes an inlet body outer transfer shell coupling surface 1918 (e.g., a surface, etc.) that contacts the inlet body coupler coupling surface 1914. In various embodiments, the inlet body outer transfer shell coupling surface 1918 is arranged along an arc. In some embodiments, the inlet body outer mounting shell coupling surface 1912 is arranged along an arc having a first radius, and the inlet body outer transfer shell coupling surface 1918 is arranged along an arc having a first radius. In some embodiments, both the inlet body outer mounting shell coupling surface 1912 and the inlet body outer transfer shell coupling surface 1918 are arranged along the same circle. In various embodiments, the inlet body outer transfer shell coupling surface 1918 is coupled to the inlet body coupler coupling surface 1914.

[0230] The inlet body outer mounting shell 1910 includes an inlet body outer mounting shell mating surface 1920 (e.g., a face, etc.). The inlet body outer mounting shell mating surface 1920 abuts against the inlet body outer mounting shell coupling surface 1912. Similarly, the inlet body outer transfer shell 1916 includes an inlet body outer transfer shell mating surface 1922 (e.g., a face, etc.). The inlet body outer transfer shell mating surface 1922 abuts against the inlet body outer transfer shell coupling surface 1918. In various embodiments, the inlet body outer mounting shell mating surface 1920 is coupled to the inlet body outer transfer shell mating surface 1922, such that the inlet body outer mounting shell 1910 is coupled to the inlet body outer transfer shell 1916. The inlet body outer mounting shell 1910 and the inlet body outer transfer shell 1916 together define an inlet body cavity 1924 (e.g., a gap, region, space, etc.).

[0231] The inlet body 1904 also includes an inlet body inner shell 1926 (e.g., a body, frame, etc.). The inlet body inner shell 1926 is contained within the inlet body cavity 1924. The inlet body inner shell 1926 does not include a flange similar to the first flange 228 or the second flange 232 of the inlet body inner shell. The inlet body inner shell 1926 is separated from the inlet body outer mounting shell inner surface 1928 (e.g., a face, etc.) of the inlet body outer mounting shell 1910 and the inlet body outer transfer shell inner surface 1930 (e.g., a face, etc.) of the inlet body outer transfer shell 1916. In some embodiments, the inlet body outer mounting shell inner surface 1928 is opposite to the inlet body outer mounting shell coupling surface 1912. In some embodiments, the inlet body outer transfer shell inner surface 1930 is opposite to the inlet body outer transfer shell mating surface 1922.

[0232] The inlet body inner shell 1926 includes an inlet body inner shell wall 1932. The inlet body inner shell 1926 also includes an inlet body inner shell end cap surface 1934. The inlet body inner shell end cap surface 1934 is abutted against the inlet body inner shell wall 1932. The inlet body inner shell end cap surface 1934 is separated from the inlet body outer transfer shell mating surface 1922 and the inlet body outer mounting shell inner surface 1928. As explained in more detail herein, the inlet body inner shell end cap surface 1934 is shaped to match the inlet body outer mounting shell inner surface 1928 and the inlet body outer transfer shell inner surface 1930, such that the gap between the inlet body inner shell end cap surface 1934 and the inlet body outer mounting shell inner surface 1928 is substantially constant along the inlet body outer mounting shell inner surface 1928 and approximately equal to the gap between the inlet body inner shell end cap surface 1934 and the inlet body outer transfer shell inner surface 1930, which is substantially constant along the inlet body outer transfer shell inner surface 1930. In some embodiments, the gap is approximately equal to 8.5 mm.

[0233] The inlet body 1904 also includes a manifold 1936 (e.g., a flange, wall, etc.). The manifold 1936 is at least partially contained within the inner shell wall 1932 of the inlet body. The manifold 1936 includes a manifold coupling surface 1938 (e.g., a surface, etc.). The manifold coupling surface 1938 is coupled to the inner shell wall 1932 of the inlet body. In various embodiments, the manifold coupling surface 1938 is coupled to the inner shell wall 1932 of the inlet body along the length of the manifold coupling surface 1938 (e.g., such that the flow of exhaust gas between the manifold coupling surface 1938 and the inner shell wall 1932 of the inlet body is prohibited, etc.). In other embodiments, the manifold coupling surface 1938 is not coupled to the inlet body inner shell wall 1932 along its length, but rather at one or more locations along the manifold coupling surface 1938 (e.g., to facilitate exhaust flow between the manifold coupling surface 1938 and the inlet body inner shell wall 1932). In various embodiments, the manifold coupling surface 1938 is arranged along an arc. In other embodiments, the manifold coupling surface 1938 is arranged along an elliptical arc.

[0234] The inlet body inlet 1906 is disposed along the inlet body inlet plane 1940. The manifold coupling surface 1938 is separated from the inlet body inlet plane 1940 by a ninth distance D9. In various embodiments, D9 is constant along the manifold coupling surface 1938 (e.g., the manifold coupling surface 1938 is parallel to the inlet body inlet plane 1940, etc.). In some embodiments, D9 is approximately equal to 30.6 mm.

[0235] The main inlet 1906 is defined by the main inlet center point 1942 (e.g., centroid, etc.). The manifold 1936 includes a manifold panel 1943 (e.g., face, surface, portion, etc.). The manifold panel 1943 is adjacent to the manifold coupling surface 1938. In various embodiments, the manifold panel 1943 is parallel to the main inlet plane 1940. In other embodiments, the manifold panel 1943 is at an angle (e.g., skewed, tilted, etc.) relative to the main inlet plane 1940.

[0236] The manifold panel 1943 includes a manifold opening 1944 (e.g., an aperture, etc.). The manifold opening 1944 is configured to receive exhaust gas from the inlet body inlet 1906. The manifold opening 1944 facilitates exhaust gas flow through the manifold panel 1943, rather than flowing around the manifold panel 1943. In various embodiments, the manifold opening 1944 is centered on the inlet body inlet center point 1942. The manifold opening 1944 can be circular, square, triangular, or other similar shapes.

[0237] The inlet body 1904 also includes a distributor tube 1946. The distributor tube 1946 may be cylindrical, triangular prism, square prism, rectangular prism, or other similar shapes. The distributor tube 1946 includes a first end 1948 that is coupled to a splitter panel 1943 around a splitter opening 1944. The first end 1948 is configured to receive exhaust gas from the splitter opening 1944. The distributor tube 1946 also includes a second end 1950 that is coupled to an end cap surface 1934 of the inlet body inner shell. The exhaust gas received by the first end 1948 is passed within the distributor tube 1946 toward the second end 1950.

[0238] The distributor tube 1946 also includes more than one distributor tube orifice 1952 (e.g., perforation, opening, hole, etc.). Each distributor tube orifice 1952 is configured to facilitate exhaust flow from the distributor tube 1946 out of the distributor tube 1946. After leaving the distributor tube 1946, the exhaust flows between the splitter plate 1936, the distributor tube 1946, the inlet body inner shell wall 1932, and the inlet body inner shell end cap surface 1934. In various embodiments, at least some of the distributor tube orifices 1952 are located closer to the second end 1950 of the distributor tube than to the first end 1948 of the distributor tube. In some embodiments, at least a majority of the distributor tube orifices 1952 are located closer to the second end 1950 of the distributor tube than to the first end 1948 of the distributor tube. In various embodiments, the diameter of each distributor orifice 1952 is between one-tenth and one-fiftieth of the diameter of the manifold opening 1944, including both one-tenth and one-fiftieth of the diameter of the manifold opening 1944. In some embodiments, the diameter of each distributor orifice 1952 is approximately equal to 6.35 mm, and the diameter of the manifold opening 1944 is approximately equal to 100 mm.

[0239] The manifold panel 1943 also includes a manifold window 1954 (e.g., an opening, orifice, window, etc.). The manifold window 1954 is configured to receive exhaust gas from the inlet body inlet 1906 independently of the manifold opening 1944. The manifold window 1954 facilitates the flow of exhaust gas through the manifold panel 1943, rather than around the manifold panel 1943. After exiting the manifold window 1954, the exhaust gas flows between the manifold 1936, the distributor tube 1946, the inlet body inner shell wall 1932, and the inlet body inner shell end cap surface 1934.

[0240] In an example embodiment, the splitter window 1954 is shaped similarly to a frustoed sector of a circle centered on the inlet body inlet center point 1942. When measured along the inlet body inlet plane 1940 (e.g., from the inlet body inlet center point 1942, etc.), the splitter window 1954 in this embodiment has a fourth sector angle S4. In various embodiments, S4 is approximately equal to an angle between 20° and 90° (inclusive) (e.g., 19°, 20°, 25°, 37°, 40°, 45°, 50°, 90°, 91°, etc.). The splitter window 1954 may be adjacent to the splitter opening 1944 and / or the splitter coupling surface 1938. The splitter window 1954 may also be formed not as a frustoed sector of a circle centered on the inlet body inlet center point 1942, but as a frustoed sector of a circle not centered on the inlet body inlet center point 1942. In addition, the splitter window 1954 may not be a truncated fan shape like a circle, but may be a circle, square, triangle or other similar shape.

[0241] The inlet body 1904 also includes a separation panel 1956. The separation panel 1956 is coupled to a manifold panel 1943, a distributor tube 1946, an inlet body inner shell wall 1932, and an inlet body inner shell end cap surface 1934. In various embodiments, the separation panel 1956 is coupled to the manifold panel 1943 along a manifold window 1954. The separation panel 1956 ensures that exhaust gas flowing between the manifold panel 1943, the distributor tube 1946, the inlet body inner shell wall 1932, and the inlet body inner shell end cap surface 1934 must flow through the distributor tube 1946 via the distributor tube orifice 1952 or around the distributor tube 1946 via the manifold window 1954.

[0242] The distributor tube 1946 includes a distributor tube panel portion 1958 and a distributor tube delivery portion 1960, each of which extends between a first end 1948 and a second end 1950 of the distributor tube. None of the distributor tube holes 1952 are located on the distributor tube panel portion 1958 (e.g., the distributor tube holes 1952 are not located on the distributor tube panel portion 1958). Instead, all the distributor tube holes 1952 are located on the distributor tube delivery portion 1960. Therefore, exhaust cannot pass through the distributor tube panel portion 1958. When measured along the inlet body inlet plane 1940 (e.g., from the inlet body inlet center point 1942, etc.), the distributor tube panel portion 1958 is arranged along an arc having a second central angle τ2. Thus, the distributor tube delivery portion 1960 is arranged along an arc with a central angle equal to 360° - τ2. In various embodiments, τ2 is approximately equal to an angle between 20° and 180° (inclusive) (e.g., 19°, 20°, 25°, 37°, 40°, 45°, 50°, 90°, 180°, 181°, etc.).

[0243] The distributor orifice 1952 is separated from the separation panel 1956 by an eighth separation angle φ8 along a plane parallel to the inlet body inlet plane 1940. In various embodiments, φ8 is greater than 50°. When measured along the inlet body inlet plane 1940 (e.g., from the inlet body inlet center point 1942, etc.), the distributor orifice 1952 is distributed within a fifth sector angle S5. In various embodiments, S5 is approximately equal to an angle between 80° and 220° (inclusive) (e.g., 79°, 80°, 90°, 100°, 140°, 145°, 150°, 220°, 221°, etc.).

[0244] In some embodiments, τ2 is equal to or greater than S5, and the distributor tube panel portion 1958 and / or the splitter window 1954 are positioned such that, when viewed along the inlet body inlet plane 1940, only the distributor tube panel portion 1958 is included in a sector of a circle centered at the inlet body inlet center point 1942 with a diameter equal to the diameter of the distributor tube 1946, wherein the sector angle is equal to S5 (e.g., the distributor tube delivery portion 1960 is not included in the sector).

[0245] The main entrance 1906 is bisected by the bisecting plane 1962 of the main body of the reducing agent delivery system. The bisecting plane 1962 of the main body of the reducing agent delivery system also bisects the main body 1901 of the reducing agent delivery system and intersects with the center point 1942 of the main entrance.

[0246] The inlet body inner shell 1926 also includes an inlet body inner shell flow distribution surface 1963 (e.g., a face, panel, etc.). The inlet body inner shell flow distribution surface 1963 is adjacent to the inlet body inner shell wall 1932. The inlet body inner shell flow distribution surface 1963 is disposed along a plane substantially parallel to the inlet plane 1940 of the inlet body and is separated from the inlet plane 1940 of the inlet body by a distance D. 10 The general situation is as follows Figure 22 As shown in the image.

[0247] The inlet body outer mounting shell 1910 also includes an inlet body outer mounting shell flow distribution surface 1964 (e.g., a face, panel, etc.). The inlet body outer mounting shell flow distribution surface 1964 is adjacent to the inner surface 1928 of the inlet body outer mounting shell. The inlet body outer mounting shell flow distribution surface 1964 is disposed along a plane substantially parallel to the inlet plane 1940 of the inlet body and is separated from the inlet plane 1940 of the inlet body by an eleventh distance D. 11 The general situation is as follows Figure 22 As shown in the diagram. D 11 Greater than D 10 Furthermore, the outer casing diversion surface 1964 of the inlet body is separated from the inner casing diversion surface 1963 of the inlet body (e.g., they are separate).

[0248] The inlet body inner shell 1926 also includes an inlet body inner shell protruding surface 1965 (e.g., a face, panel, etc.). The inlet body inner shell protruding surface 1965 is adjacent to the inlet body inner shell wall 1932 and the inlet body inner shell diversion surface 1963.

[0249] The inlet body outer mounting housing 1910 also includes an inlet body outer mounting housing protruding surface 1966 (e.g., a face, panel, etc.). The inlet body outer mounting housing protruding surface 1966 is adjacent to the inlet body outer mounting housing inner surface 1928 and the inlet body outer mounting housing diversion surface 1964. The inlet body outer mounting housing protruding surface 1966 is spaced apart from the inlet body inner housing protruding surface 1965.

[0250] The inlet body outer mounting housing 1910 also includes an inlet body outer mounting housing recess 1968 (e.g., a recess, etc.). The inlet body outer mounting housing recess 1968 is opposite to the inlet body outer mounting housing diversion surface 1964. The inlet body outer mounting housing recess 1968 includes an inlet body outer mounting housing outer mounting surface 1970 (e.g., a face, panel, etc.). The inlet body outer mounting housing outer mounting surface 1970 is opposite to the inlet body outer mounting housing diversion surface 1964.

[0251] The inlet body inner shell 1926 also includes an inlet body inner shell recess 1967 (e.g., a depression). The inlet body inner shell recess 1967 is opposite to the inlet body inner shell flow distribution surface 1963. The inlet body inner shell recess 1967 includes an inlet body inner shell outer mounting surface 1971 (e.g., a face, panel, etc.). The inlet body inner shell outer mounting surface 1971 is opposite to the inlet body inner shell flow distribution surface 1963. The inlet body inner shell outer mounting surface 1971 is spaced apart from the inlet body outer mounting shell outer mounting surface 1970.

[0252] The inlet body outer mounting housing 1910 includes an external injection port 1972 (e.g., an opening, hole, window latch, etc.). The external injection port 1972 extends through the outer mounting surface 1970 and the diversion surface 1964 of the inlet body outer mounting housing. The external injection port 1972 is configured to receive an injection mount 1974 (e.g., a mounting plate, etc.). The injection mount 1974 is configured to couple to the dispensing module 192 and / or the injector 120 such that the dispensing module 192 and / or the injector 120 are positioned to provide reducing agent to the inlet body outer mounting housing 1910 via the external injection port 1972. The outer mounting surface 1970 of the inlet body outer mounting housing is generally planar and facilitates coupling of the injection mount 1974 in various different orientations to accommodate various configurations of the dispensing module 192 and / or the injector 120.

[0253] The inlet body inner shell 1926 also includes an internal injection port 1973. The internal injection port 1973 extends through the outer mounting surface 1971 and the flow distribution surface 1963 of the inlet body inner shell. The internal injection port 1973 is configured to receive an injection mount 1974 (e.g., a mounting plate, etc.). The injection mount 1974 extends between the outer mounting shell 1910 and the inner shell 1926. The outer mounting surface 1971 of the inlet body inner shell is generally planar and facilitates coupling of the injection mount 1974 in various orientations to accommodate different configurations of the dispensing module 192 and / or the injector 120.

[0254] The inlet body inner shell 1926 also includes more than one inlet body inner shell aperture 1975 (e.g., perforation, opening, hole, etc.) disposed on the inlet body inner shell end cap surface 1934. Each inlet body inner shell aperture 1975 is disposed on the inlet body inner shell end cap surface 1934 within or around the distributor tube 1946. In various embodiments, at least one of the inlet body inner shell apertures 1975 is disposed on the inlet body inner shell end cap surface 1934 within the distributor tube 1946, and at least one of the inlet body inner shell apertures 1975 is disposed on the inlet body inner shell end cap surface 1934 around the distributor tube 1946. Each inlet body inner shell aperture 1975 is configured to facilitate exhaust from between the inlet body inner shell 1926 and the inlet body outer mounting shell 1910 and / or from between the inlet body inner shell 1926 and the inlet body outer delivery shell 1916 through into the inlet body inner shell 1926.

[0255] The inner shell aperture 1975 of the inlet body is separated from the separation panel 1956 by a ninth separation angle φ9 along a plane parallel to the inlet plane 1940 of the inlet body. In various embodiments, φ9 is greater than 5°. When measured along the inlet plane 1940 of the inlet body (e.g., from the inlet center point 1942 of the inlet body, etc.), the inner shell aperture 1975 of the inlet body is distributed within a sixth sector angle S6. In various embodiments, S6 is approximately equal to an angle between 80° and 180° (inclusive) (e.g., 79°, 80°, 90°, 100°, 140°, 145°, 150°, 180°, 181°, etc.).

[0256] At least some of the inlet body inner shell holes 1975 are aligned with at least some of the distributor tube holes 1952. In various embodiments, at least some of the inlet body inner shell holes 1975 are located closer to the second end 1950 of the distributor tube than to the inlet body inner shell wall 1932. In various embodiments, the diameter of each inlet body inner shell hole 1975 is between one-tenth and one-fiftieth of the diameter of the manifold opening 1944, including one-tenth and one-fiftieth of the diameter of the manifold opening 1944. In some embodiments, the diameter of each inlet body inner shell hole 1975 is approximately equal to 6.35 mm.

[0257] In various embodiments, the inlet body 1904 also includes a shield assembly 1976 (e.g., a cover, etc.). The shield assembly 1976 is similar to the shield assembly 290. The shield assembly 1976 is disposed along the inlet body outer mounting housing diversion surface 1964 and is configured to partially shield the reducing agent supplied through the outer injection port 1972 from the exhaust gas.

[0258] The shield assembly 1976 includes a shield flange 1977 (e.g., a band, etc.). The shield flange 1977 is similar to the shield flange 292. The shield flange 1977 is coupled to the inlet body outer mounting housing split surface 1964 around the outer injection port 1972. The shield flange 1977 extends around the inner injection port 1973 and may be coupled to the inlet body inner housing end cap surface 1934.

[0259] The shield assembly also includes a shield plate 1978 (e.g., a cover, etc.). The shield plate 1978 may be similar to the shield plate 294. The shield plate 1978 may be coupled to the shield flange 1977 and the inlet body inner shell 1926, but not to the inlet body outer mounting shell 1910.

[0260] The shroud assembly 1976 also includes a shroud guide 1979 (e.g., fins, walls, barriers, etc.). The shroud guide 1979 is similar to the shroud guide 295. The shroud guide 1979 is coupled to the inlet body inner shell 1926. The shroud guide 1979 is also coupled to the shroud flange 1977 and / or the shroud plate 1978.

[0261] A shroud inlet 1980 (e.g., hole, window, orifice, etc.) is formed between the shroud plate 1978, the shroud flange 1977, the shroud guide 1979, the inlet body inner shell 1926 (e.g., surrounding the inner injection port 1973, etc.), and the inner surface 1928 of the inlet body outer mounting shell. The shroud inlet 1980 may resemble the shroud inlet 296. The shroud inlet 1980 receives exhaust gas and supplies it to the shroud assembly 1976, and thus surrounds the outer injection port 1972. This exhaust gas may help propel the reducing agent around the distributor tube 1946. The shroud guide 1979 guides a portion of the exhaust gas flowing between the inlet body inner shell wall 1932 and the inner surface 1928 of the inlet body outer mounting shell and / or between the inlet body inner shell wall 1932 and the inner surface 1928 of the inlet body outer delivery shell into the shroud inlet 1980.

[0262] A shield outlet 1981 (e.g., a hole, window, aperture, etc.) is formed between the shield flange 1977 and the shield plate 1978. The shield outlet 1981 may be similar to the shield outlet 297. Exhaust gas exits the shield assembly 1976 via the shield outlet 1981 (e.g., after a reducing agent has been provided to the exhaust gas, etc.).

[0263] The inlet body outer transfer housing 1916 includes an inlet body outer transfer housing outlet 1982 (e.g., a hole, opening, etc.). The inlet body outer transfer housing outlet 1982 extends through the inner surface 1930 of the inlet body outer transfer housing and is adjacent to the inner wall 1932 of the inlet body. In various embodiments, the inlet body outer transfer housing outlet 1982 is elliptical. In other embodiments, the inlet body outer transfer housing outlet 1982 is circular, square, rectangular, or other similar shapes.

[0264] The inlet body inner shell 1926 also includes an inlet body inner shell outlet 1983 (e.g., a hole, opening, etc.). The inlet body inner shell outlet 1983 extends through the inlet body inner shell wall 1932 and is adjacent to the inlet body outer transfer shell outlet 1982. In various embodiments, the inlet body inner shell outlet 1983 and the inlet body outer transfer shell outlet 1982 are concentric (e.g., concentric ellipses, concentric circles, etc.). In various embodiments, the inlet body inner shell outlet 1983 is elliptical. In other embodiments, the inlet body inner shell outlet 1983 is circular, square, rectangular, or other similar shapes.

[0265] The reducing agent delivery system body 1901 also includes an inner delivery tube 1984 (e.g., conduit, tubing, connector, etc.). The inner delivery tube 1984 is coupled to the outer delivery shell 1916 of the inlet body surrounding the outlet 1982 of the outer delivery shell of the inlet body. The inner delivery tube 1984 includes a straight portion 1985 and a curved portion 1986. The straight portion 1985 is adjacent to the curved portion 1986 and is separated from the outer delivery shell 1916 of the inlet body by the curved portion 1986. The curved portion 1986 gradually curves from the straight portion 1985 toward the outer delivery shell 1916 of the inlet body to facilitate (e.g., due to the rounded shape of the outer delivery shell 1916 of the inlet body) a flush fit between the curved portion 1986 and the outer delivery shell 1916 of the inlet body.

[0266] The straight portion 1985 of the inner transfer tube is centered on the central axis 1987 of the inner transfer tube. The central axis 1987 of the inner transfer tube extends through the outer transfer shell outlet 1982 of the inlet body and the inner shell outlet 1983 of the inlet body, and intersects with the inner shell 1926 of the inlet body. In various embodiments, the straight portion 1985 of the inner transfer tube has an elliptical cross-section along a plane orthogonal to the inlet body inlet plane 1940, intersecting with the central axis 1987 of the inner transfer tube and intersecting with the bisecting plane 1962 of the reducing agent delivery system body. In other embodiments, the straight portion 1985 of the inner transfer tube has a circular, square, rectangular or other similar shaped cross-section along a plane orthogonal to the inlet body inlet plane 1940, intersecting with the central axis 1987 of the inner transfer tube and intersecting with the bisecting plane 1962 of the reducing agent delivery system body.

[0267] The central axis of the inner transfer tube, 1987, separates from the bisecting plane of the reducing agent delivery system, 1962, along a plane parallel to the inlet body's inlet plane, 1940, at a tenth separation angle φ. 10 In various embodiments, φ 10 Less than or approximately equal to 50°. In some embodiments, φ 10 It is approximately equal to 14°.

[0268] The straight portion 1985 of the inner delivery tube is coupled to the outlet body shell 1988 (e.g., body, frame, etc.) of the outlet body 1990 (e.g., shell, frame, assembly, etc.) of the reducing agent delivery system body 1901. Specifically, the straight portion 1985 of the inner delivery tube is coupled to the outlet body shell 1988 around the outlet body shell inlet 1992 (e.g., hole, opening, etc.). In various embodiments, the inlet body 1904 is coupled to the outlet body 1990 only through the inner delivery tube 1984. The outlet body shell inlet 1992 extends through the outlet body shell inner surface 1994 (e.g., face, etc.) of the outlet body shell 1988. In various embodiments, the outlet body shell inlet 1992 is elliptical. In other embodiments, the outlet body shell inlet 1992 is circular, square, rectangular, or other similar shapes.

[0269] The relationship between the outlet body shell inlet 1992, the inlet body outer conveying shell outlet 1982, and the inlet body inner shell outlet 1983 makes the reducing agent delivery system 1900 approximately Z-shaped or approximately S-shaped. This shape allows the exhaust gas to travel a longer time within the inner conveying pipe 1984 over the same distance between the inlet body 1904 and the outlet body 1990 (e.g., between the center point of the inlet body 1904 and the center point of the outlet body 1990, etc.) compared to when the outlet body shell inlet 1992, the inlet body outer conveying shell outlet 1982, and the inlet body inner shell outlet 1983 are arranged in an approximately B-shaped or approximately I-shaped reducing agent delivery system.

[0270] The outlet body 1990 does not include an inner shell similar to the inlet body inner shell 1926 or a splitter similar to the splitter 1936. However, the outlet body 1990 includes an outlet body outlet 1996 (e.g., an opening, orifice, etc.). The outlet body outlet 1996 is configured to supply exhaust gas to the exhaust duct system 104. In some embodiments, the reductant delivery system 1900 is positioned upstream of the SCR catalyst member 108 such that the SCR catalyst member 108 receives exhaust gas from the outlet body outlet 1996.

[0271] The outlet body 1990 also includes an outlet body coupler 1998 (e.g., a body, etc.). The outlet body coupler 1998 intersects with the outlet body outlet 1996. The outlet body coupler 1998 is coupled to the exhaust duct system 104 around the outlet body outlet 1996. In various embodiments, the outlet body coupler 1998 is circular.

[0272] The outlet body 1990 also includes a perforated plate 2000 (e.g., a wall, flange, etc.). The perforated plate 2000 extends across the diameter of the outlet body shell 1988. The perforated plate 2000 includes a perforated plate coupling surface 2002 (e.g., a surface, etc.). In various embodiments, the perforated plate coupling surface 2002 is arranged in a circular shape. In other embodiments, the perforated plate coupling surface 2002 is arranged in an elliptical shape.

[0273] The perforated plate 2000 also includes more than one perforated plate perforation 2004 (e.g., hole, opening, aperture, etc.). The perforated plate 2000 is coupled to the outlet body housing 1988 such that exhaust gas flowing out of the outlet body outlet 1996 first passes through the perforated plate 2000 via one of the perforated plate perforations 2004 (e.g., so that no exhaust gas can bypass the perforated plate 2000, etc.).

[0274] The outlet body 1990 also includes a first guide vane 2006 and a second guide vane 2008. The first guide vane 2006 and the second guide vane 2008 extend within the outlet body housing 1988. The first guide vane 2006 and the second guide vane 2008 are each coupled to the inner surface 1994 of the outlet body housing and / or the perforated plate 2000. The first guide vane 2006 deflects a portion of the exhaust gas to a first portion of the outlet body outlet 1996, which may correspond to the upper section of the substrate located downstream of the outlet body 1900. However, as explained herein, the first guide vane 2006 allows a portion of the exhaust gas to flow through the first guide vane 2006 to the second guide vane 2008. The second guide vane 2008 deflects a portion of the exhaust gas to a second portion of the outlet body outlet 1996, which may correspond to the middle section of the substrate located downstream of the outlet body 1900. Furthermore, a portion of the exhaust gas flows through the second guide 2008 and is diverted to a third portion of the outlet body outlet 1996, which corresponds to the lower section of the substrate downstream of the outlet body 1900. Thus, the first guide 2006 and the second guide 2008 can uniformly distribute the exhaust gas across the entire surface of the substrate positioned downstream of the outlet body 1900.

[0275] The first guide vane 2006 is centered on its central axis 2010. When observed through the inner delivery pipe 1984, the central axis 2010 of the first guide vane extends across the outlet body shell inlet 1992. The central axis 2010 of the first guide vane is separated from the reducing agent delivery system body's bisecting plane 1962 by an eleventh separation angle φ along a plane parallel to the inlet body inlet plane 1940. 11 In various embodiments, φ 11 Greater than approximately equal to 50°. In some embodiments, φ 11 equal to φ 10 The sum of φ and 90° makes the central axis 1987 of the inner delivery tube perpendicular to the central axis 2010 of the first guide tube. In some embodiments, φ 11 It is approximately equal to 76°.

[0276] The first guide vane 2006 receives the exhaust gas from the inner delivery pipe 1984 and redirects the exhaust gas within the outlet body 1990 to aid in its rotation within the outlet body 1990. This rotation enhances the mixing of the reducing agent and the exhaust gas within the outlet body 1990. Furthermore, this rotation increases heat transfer to the reducing agent, thereby increasing its decomposition and mitigating impact on the various surfaces of the reducing agent delivery system 1900. Additionally, this rotation reduces the back pressure of the reducing agent delivery system 1900 because the momentum of the exhaust gas leaving the inner delivery pipe 1984 is gradually released during the rotation of the exhaust gas within the outlet body 1990 caused by the first guide vane 2006. By selecting φ... 11 The rotation provided by the first flow guide 2006 can be customized for the target application.

[0277] The second guide vane 2008 is centered on its central axis 2012. When viewed through the inner delivery pipe 1984, the central axis 2012 of the second guide vane extends across the outlet body shell inlet 1992. In various embodiments, the central axis 2012 of the second guide vane intersects with the central axis 2010 of the first guide vane. The central axis 2012 of the second guide vane is separated from the reducing agent delivery system body bisecting plane 1962 by a twelfth separation angle φ along a plane parallel to the inlet body inlet plane 1940. 12 In various embodiments, φ 12 Greater than approximately equal to 50°. In some embodiments, φ 12 equal to φ 10 The sum of φ and 90° makes the central axis 1987 of the inner delivery tube perpendicular to the central axis 2010 of the first guide tube. In some embodiments, φ 12 equal to φ 11 This makes the central axis 2010 of the first guide vane and the central axis 2012 of the second guide vane parallel. In some embodiments, φ12 It is approximately equal to 76°.

[0278] The second deflector 2008 receives the exhaust gas from the inner delivery pipe 1984 and redirects the exhaust gas within the outlet body 1990 to aid in its rotation. This rotation enhances the mixing of the reducing agent and the exhaust gas within the outlet body 1990. Furthermore, this rotation increases heat transfer to the reducing agent, thereby increasing its decomposition and mitigating impact on the various surfaces of the reducing agent delivery system 1900. Additionally, this rotation reduces the back pressure of the reducing agent delivery system 1900 because the momentum of the exhaust gas leaving the inner delivery pipe 1984 is gradually released during the rotation of the exhaust gas within the outlet body 1990 caused by the first deflector 2006. By selecting φ... 12 The first flow guide 2006 offers a rotation that can be customized for the target application.

[0279] The reducing agent can impact the first deflector 2006 and / or the second deflector 2008. However, since the first deflector 2006 and the second deflector 2008 are immersed in the exhaust gas (e.g., the exhaust gas flows in front of and behind the first deflector 2006, and in front of and behind the second deflector 2008), the first deflector 2006 and the second deflector 2008 can be heated to a relatively high temperature by the exhaust gas. This heating promotes the decomposition of the reducing agent impacting the first deflector 2006 and / or the second deflector 2008.

[0280] In operation, exhaust gas (e.g., from exhaust duct system 104, etc.) flows into inlet body inlet 1906. As described herein, the exhaust gas flowing through reducing agent delivery system 1900 is guided, diverted, and separated in various ways to promote enhanced mixing and decomposition of the reducing agent in the exhaust gas and to mitigate the impact of the reducing agent on the various surfaces of reducing agent delivery system 1900. In these ways, reducing agent delivery system 1900 may be more desirable than other systems that do not include similar mechanisms in terms of enhancing the mixing and decomposition of the reducing agent in the exhaust gas and mitigating the impact of the reducing agent (e.g., due to additional cleaning of reducing agent deposits in these systems, etc.).

[0281] A first portion of the exhaust flows through the manifold window 1954 and between the manifold panel 1943, the split panel 1956, the distributor tube panel portion 1958, the inlet body inner shell end cap surface 1934, the inlet body inner shell split surface 1963, and the inlet body inner shell protruding surface 1965, and subsequently flows along the inlet body inner shell split surface 1963, the inlet body inner shell protruding surface 1965, and / or the inlet body inner shell end cap surface 1934, and around the delivery tube 1946. As the exhaust flows around the delivery tube 1946, it causes the exhaust to form vortices (e.g., about an axis extending through the inlet body inlet center point 1942 and orthogonal to the inlet body inlet plane 1940). Then, the first portion of the exhaust flows into the inner delivery tube bend portion 1986 via the inlet body inner shell outlet 1983.

[0282] Before flowing into the curved section 1986 of the inner delivery pipe, the first portion of the exhaust gas is supplied with a reducing agent through the outer injection port 1972 and the inner injection port 1973. The reducing agent mixes with the first portion of the exhaust gas, causing the reducing agent and the first portion of the exhaust gas to form a vortex around the delivery pipe 1946.

[0283] The injection auxiliary portion of the exhaust gas in the first section flows into the shroud assembly 1976 via the shroud inlet 1980 (e.g., between the shroud plate 1978, the shroud flange 1977, and the inlet body outer mounting shell diversion surface 1964, etc.). The injection auxiliary portion of the exhaust gas provides reducing agent via the outer injection port 1972 and the inner injection port 1973 (e.g., from the injector 120 and / or the dispensing module 192). The injection auxiliary portion of the exhaust gas then exits the shroud assembly 1976 via the shroud outlet 1981. The injection auxiliary portion of the exhaust gas helps to propel the reducing agent around the delivery pipe 1946. Specifically, the shroud assembly 1976 protects the flow of exhaust gas and reducing agent away from the inlet body inner shell end cap surface 1934 from the flow of exhaust gas toward the inlet body inner shell end cap surface 1934, thereby allowing additional reducing agent to be supplied to the inner delivery pipe bend 1986 (e.g., instead of being pushed against the inlet body inner shell end cap surface 1934, etc.). In various embodiments, the injection assistance portion may be approximately equal to 5%, 4%, 3%, 2% or other similar values ​​of the total exhaust flow rate entering the inlet body inlet 1906.

[0284] Unlike the exhaust flowing through the manifold window 1954, the second portion of the exhaust flows through the manifold opening 1944 and enters the delivery pipe 1946. The second portion of the exhaust flows from the first end 1948 of the delivery pipe to the second end 1950 of the delivery pipe. Then, the second portion of the exhaust leaves the delivery pipe 1946 through the delivery pipe hole 1952 and merges with the first portion of the exhaust between the manifold panel 1943, the separation panel 1956, the distributor pipe panel portion 1958, the inlet body inner shell end cap surface 1934, the inlet body inner shell diversion surface 1963, and the inlet body inner shell protruding surface 1965.

[0285] Because it is separated from the manifold window 1954, the second part of the exhaust merges with the first part of the exhaust after the first part of the exhaust has begun to rotate. Therefore, introducing the second part of the exhaust into the first part of the exhaust does not significantly reduce the rotation of the first part of the exhaust. Furthermore, at least some of the transfer pipe holes 1952 can be aligned with the inlet body inner shell outlet 1983. Thus, the second part of the exhaust leaving these transfer pipe holes 1952 can push the exhaust toward the inlet body inner shell outlet 1983. The positions of the transfer pipe holes 1952 are chosen such that the exhaust leaving each transfer pipe hole 1952 does not substantially change the exhaust vortex with respect to the transfer pipe 1946. Furthermore, the exhaust flowing within the transfer pipe 1946 (e.g., compared to exhaust that has already been mixed with a reducing agent) is relatively hot. Therefore, the impact of the reducing agent on the transfer pipe 1946 is mitigated.

[0286] Unlike the exhaust flowing through the manifold window 1954 or the exhaust flowing through the manifold opening 1944, the third portion of the exhaust flows between the inner surface 1928 of the outer mounting shell of the inlet body and the inner shell wall 1932 of the inlet body (e.g., between the outer mounting shell 1910 and the inner shell 1926 of the inlet body, etc.) and between the inner surface 1930 of the outer conveyor shell of the inlet body and the inner shell wall 1932 of the inlet body (e.g., between the outer conveyor shell 1916 and the inner shell 1926 of the inlet body, etc.). The exhaust produces flow along the inner shell wall 1932 of the inlet body, which reduces the impact of the reducing agent on the inner shell wall 1932 of the inlet body (e.g., heating of the inner shell wall 1932 of the inlet body due to the relatively hot exhaust).

[0287] Some of the exhaust gas flows through the inlet body inner shell orifice 1975 and into the inlet body inner shell 1926, or passes through the inlet body inner shell orifice 1975 and into the transfer pipe 1946. Specifically, some of the inlet body inner shell orifices 1975 are bounded by the transfer pipe 1946 (e.g., external, closed, etc.), while other inlet body inner shell orifices 1975 are partially bounded by the transfer pipe 1946 (e.g., external, intersecting, etc.). In various embodiments, at least some of the inlet body inner shell orifices 1975 are aligned with at least some of the transfer pipe orifices 1952 (e.g., when viewed along the plane in which the transfer pipe orifice 1952 is disposed, the central axis of the inlet body inner shell orifice 1975 extends across the transfer pipe orifice 1952, and when viewed along the plane in which the inlet body inner shell orifice 1975 is disposed, the central axis of the transfer pipe orifice 1952 extends across the inlet body inner shell orifice 1975, etc.). Therefore, the exhaust gas flowing from the aligned inlet body inner shell bore 1975 and the exhaust gas flowing from the transfer pipe bore 1952 mix and can be guided together toward the inlet body inner shell outlet 1983. Thus, the back pressure of the reducing agent delivery system 1900 can be reduced. The exhaust gas flowing through the inlet body inner shell bore 1975 and into the transfer pipe 1946 helps the transfer pipe 1946 guide the exhaust gas into the transfer pipe bore 1952. Thus, the back pressure of the reducing agent delivery system 1900 can be reduced. Furthermore, the exhaust gas flowing through all the inlet body inner shell bores 1975 (e.g., compared to exhaust gas already mixed with the reducing agent) is relatively hot. Therefore, the impact of the reducing agent on the inlet body inner shell wall 1932 and / or the inlet body inner shell end cap surface 1934 is reduced.

[0288] Some of the exhaust flowing between the inner surface 1928 of the outer casing of the inlet body and the inner casing wall 1932 of the inlet body is guided into the inlet 1980 of the casing through the casing guide 1979.

[0289] The exhaust gas flowing within the curved section 1986 of the inner conveying pipe flows towards the straight section 1985 of the inner conveying pipe. The exhaust gas flowing within the straight section 1985 of the inner conveying pipe flows into the outlet main body shell 1988. The exhaust gas flowing within the outlet main body shell 1988 can flow along the inner surface 1994 of the outlet main body shell to create vortices in the exhaust gas. These vortices can be generated by φ... 10 Enhancement, φ 10 The exhaust gas is effectively directed to flow semi-tangentially (e.g., relative to the axial direction, relative to the radial direction, etc.) into the outlet body housing 1988. Furthermore, this vortex can be enhanced by the first guide vane 2006 and / or the second guide vane 2008.

[0290] Then, the exhaust gas flowing within the outlet body housing 1988 flows through the perforated plate 2000 and exits the outlet body 1990 via the outlet body outlet 1996. By flowing through the perforated plate 2000, the exhaust gas flow can be straightened, thereby enhancing the uniformity of the exhaust gas flowing to components downstream of the reducing agent delivery system 1900 (e.g., SCR catalyst component 108, etc.) of the exhaust aftertreatment system 100.

[0291] The inlet body outer mounting housing 1910 may further include a first sensor coupling mount (e.g., a protrusion, etc.). The first sensor coupling mount can extend from the outer surface of the inlet body outer mounting housing 1910 (e.g., a protrusion, a projection, etc.). The first sensor coupling mount can be located upstream of the outer injection port 1972. Thus, the sensor coupled to the first coupling mount can withstand relatively high exhaust flow rates and can be substantially isolated from the reducing agent, thereby enabling accurate measurement results to be obtained from the sensor (e.g., because the sensor is not covered by reducing agent deposits, etc.). In other embodiments, the first sensor coupling mount can be located at other locations.

[0292] The reducing agent delivery system 1900 may further include an inlet body outer mounting housing temperature sensor coupler. The inlet body outer mounting housing temperature sensor coupler may be coupled to an inlet body outer mounting housing first sensor coupler and is configured to be coupled to an upstream temperature sensor 138. The inlet body outer mounting housing first sensor coupler may be configured to supply exhaust gas to and / or receive the upstream temperature sensor 138, such that the upstream temperature sensor 138 extends into the inlet body outer mounting housing 1910. The upstream temperature sensor 138 may determine the temperature of the exhaust gas before it flows into the inner delivery pipe bend 1986.

[0293] The inlet body outer mounting housing 1910 may further include a second sensor coupling mount (e.g., a protrusion, etc.). The second sensor coupling mount may extend from the outer surface of the inlet body outer mounting housing 1910 (e.g., a protrusion, a projection, etc.). The second sensor coupling mount may be centered on an axis extending through the inlet body inlet 1906 (e.g., orthogonal to the inlet body inlet plane 1940, etc.). The reducing agent delivery system 1900 may further include a pressure sensor coupling. The pressure sensor coupling may be coupled to the second sensor coupling mount and configured to be coupled to the pressure sensor 140. The second sensor coupling mount may be configured to provide exhaust to and / or receive the pressure sensor 140 such that the pressure sensor 140 extends into the inlet body outer mounting housing 1910. The pressure sensor 140 may determine the pressure of the exhaust before the exhaust flows into the inner delivery pipe bend 1986.

[0294] The outlet housing 1988 may also include an outlet housing sensor coupling mount (e.g., a protrusion, etc.). The outlet housing sensor coupling mount may extend from the outer surface of the outlet housing 1988. The outlet housing sensor coupling mount may be centered on an axis extending across the outlet housing 1988. The outlet housing sensor coupling mount may be positioned such that it is opposite to a target position on the inner surface 1994 of the outlet housing (e.g., depending on the application of the reducing agent delivery system 1900, depending on the space requirements of the reducing agent delivery system 1900, etc.).

[0295] The reducing agent delivery system 1900 may further include an outlet body housing temperature sensor coupler. The outlet body housing temperature sensor coupler is coupled to an outlet body housing sensor coupling mount and configured to couple to a downstream temperature sensor 142. The outlet body housing temperature sensor coupler may be configured to provide exhaust gas to and / or receive the downstream temperature sensor 142, such that the downstream temperature sensor 142 extends into the outlet body housing 1988. The downstream temperature sensor 142 can determine the temperature of the exhaust gas after it (e.g., via the straight section 1985 of the inner delivery pipe, etc.) flows into the outlet body housing.

[0296] It should be understood that, unlike the separate components that are coupled together, the outer mounting shell 1910 and the outer transfer shell 1916 of the inlet body can also be structurally integrated (e.g., formed by an integral construction).

[0297] VI. Fourth Example: Reducing Agent Delivery System

[0298] Figures 29-37 A reducing agent delivery system 2900 according to an example embodiment is shown. In various embodiments, the reducing agent delivery system 2900 is a reducing agent delivery system 102. The reducing agent delivery system 2900 is similar to the reducing agent delivery system 200. The reducing agent delivery system 2900 includes a reducing agent delivery system body 2901 (e.g., a shell, frame, component, etc.). The reducing agent delivery system body 2901 includes an inlet body 2904 (e.g., a shell, frame, component, etc.). The inlet body 2904 includes an inlet body inlet 2906 (e.g., an opening, orifice, etc.). The inlet body inlet 2906 is configured to receive exhaust gas from the exhaust duct system 104. In some embodiments, the reducing agent delivery system 2900 is positioned downstream of a particulate filter 106 such that the inlet body inlet 2906 receives exhaust gas from the particulate filter 106.

[0299] The inlet body 2904 includes an inlet body coupler 2908 (e.g., a body, etc.). The inlet body coupler 2908 intersects with the inlet body inlet 2906. The inlet body coupler 2908 is coupled to the exhaust duct system 104 around the inlet body inlet 2906. In various embodiments, the inlet body coupler 2908 is circular.

[0300] The inlet body 2904 also includes an inlet body outer mounting shell 2910 (e.g., a body, frame, etc.). The inlet body outer mounting shell 2910 includes an inlet body outer mounting shell coupling surface 2912 (e.g., a face, etc.). In various embodiments, the inlet body outer mounting shell coupling surface 2912 is arranged along an arc. The inlet body outer mounting shell coupling surface 2912 contacts the inlet body coupler coupling surface 2914 (e.g., a face, etc.) of the inlet body coupler 2908. In various embodiments, the inlet body coupler coupling surface 2914 is arranged along an arc. In various embodiments, the inlet body outer mounting shell coupling surface 2912 is coupled to the inlet body coupler coupling surface 2914.

[0301] The inlet body 2904 also includes an inlet body outer transfer shell 2916 (e.g., a body, frame, etc.). The inlet body outer transfer shell 2916 includes an inlet body outer transfer shell coupling surface 2918 (e.g., a surface, etc.) that contacts the inlet body coupler coupling surface 2914. In various embodiments, the inlet body outer transfer shell coupling surface 2918 is arranged along an arc. In some embodiments, the inlet body outer mounting shell coupling surface 2912 is arranged along an arc having a first radius, and the inlet body outer transfer shell coupling surface 2918 is arranged along an arc having a first radius. In some embodiments, both the inlet body outer mounting shell coupling surface 2912 and the inlet body outer transfer shell coupling surface 2918 are arranged along the same circle. In various embodiments, the inlet body outer transfer shell coupling surface 2918 is coupled to the inlet body coupler coupling surface 2914.

[0302] The inlet body outer mounting shell 2910 includes an inlet body outer mounting shell mating surface 2920 (e.g., a face, etc.). The inlet body outer mounting shell mating surface 2920 abuts against the inlet body outer mounting shell coupling surface 2912. Similarly, the inlet body outer transfer shell 2916 includes an inlet body outer transfer shell mating surface 2922 (e.g., a face, etc.). The inlet body outer transfer shell mating surface 2922 abuts against the inlet body outer transfer shell coupling surface 2918. In various embodiments, the inlet body outer mounting shell mating surface 2920 is coupled to the inlet body outer transfer shell mating surface 2922, such that the inlet body outer mounting shell 2910 is coupled to the inlet body outer transfer shell 2916. The inlet body outer mounting shell 2910 and the inlet body outer transfer shell 2916 together define an inlet body cavity 2924 (e.g., a gap, area, space, etc.).

[0303] The inlet body 2904 also includes an inlet body inner shell 2926 (e.g., a body, frame, etc.). The inlet body inner shell 2926 is contained within the inlet body cavity 2924. The inlet body inner shell 2926 does not include a flange similar to the first flange 228 or the second flange 232 of the inlet body inner shell. The inlet body inner shell 2926 is separate from the inlet body outer mounting shell inner surface 2928 (e.g., a face, etc.) of the inlet body outer mounting shell 2910 and the inlet body outer transfer shell inner surface 2930 (e.g., a face, etc.) of the inlet body outer transfer shell 2916. In some embodiments, the inlet body outer mounting shell inner surface 2928 is opposite to the inlet body outer mounting shell coupling surface 2912. In some embodiments, the inlet body outer transfer shell inner surface 2930 is opposite to the inlet body outer transfer shell mating surface 2922.

[0304] The inlet body inner shell 2926 includes an inlet body inner shell wall 2932. The inlet body inner shell 2926 also includes an inlet body inner shell end cap surface 2934. The inlet body inner shell end cap surface 2934 is abutted against the inlet body inner shell wall 2932. The inlet body inner shell end cap surface 2934 is separated from the inlet body outer transfer shell mating surface 2922 and the inlet body outer mounting shell inner surface 2928. As explained in more detail herein, the inlet body inner shell end cap surface 2934 is shaped to match the inlet body outer mounting shell inner surface 2928 and the inlet body outer transfer shell inner surface 2930, such that the gap between the inlet body inner shell end cap surface 2934 and the inlet body outer mounting shell inner surface 2928 is substantially constant along the inlet body outer mounting shell inner surface 2928 and approximately equal to the gap between the inlet body inner shell end cap surface 2934 and the inlet body outer transfer shell inner surface 2930, which is substantially constant along the inlet body outer transfer shell inner surface 2930. In some embodiments, the gap is approximately equal to 8.5 mm.

[0305] The inlet body 2904 also includes a manifold 2936 (e.g., a flange, wall, etc.). The manifold 2936 is at least partially contained within the inner shell wall 2932 of the inlet body. The manifold 2936 includes a manifold coupling surface 2938 (e.g., a surface, etc.). The manifold coupling surface 2938 is coupled to the inner shell wall 2932 of the inlet body. In various embodiments, the manifold coupling surface 2938 is coupled to the inner shell wall 2932 of the inlet body along its length (e.g., such that exhaust flow between the manifold coupling surface 2938 and the inner shell wall 2932 is prohibited, etc.). In other embodiments, the manifold coupling surface 2938 is not coupled to the inlet body inner shell wall 2932 along its length, but rather at one or more locations along the manifold coupling surface 2938 (e.g., to facilitate exhaust flow between the manifold coupling surface 2938 and the inlet body inner shell wall 2932). In various embodiments, the manifold coupling surface 2938 is arranged along an arc. In other embodiments, the manifold coupling surface 2938 is arranged along an elliptical arc.

[0306] The main inlet 2906 is positioned along the main inlet plane 2940. The splitter coupling surface 2938 is separated from the main inlet plane 2940 by a twelfth distance D. 12 In various embodiments, D 12 The coupling surface 2938 along the manifold is constant (e.g., the manifold coupling surface 2938 is parallel to the inlet body inlet plane 2940, etc.). In some embodiments, D 12 It is approximately equal to 28.6 mm.

[0307] The main inlet 2906 is defined by the main inlet center point 2942 (e.g., centroid, etc.). The manifold 2936 includes a manifold panel 2943 (e.g., face, surface, portion, etc.). The manifold panel 2943 is adjacent to the manifold coupling surface 2938. In various embodiments, the manifold panel 2943 is parallel to the main inlet plane 2940. In other embodiments, the manifold panel 2943 is at an angle (e.g., skewed, tilted, etc.) relative to the main inlet plane 2940.

[0308] The manifold panel 2943 includes a manifold opening 2944 (e.g., an aperture, etc.). The manifold opening 2944 is configured to receive exhaust gas from the inlet body inlet 2906. The manifold opening 2944 facilitates exhaust gas flow through the manifold panel 2943, rather than flowing around the manifold panel 2943. In various embodiments, the manifold opening 2944 is centered on the inlet body inlet center point 2942. The manifold opening 2944 can be circular, square, triangular, or other similar shapes.

[0309] The inlet body 2904 also includes a distributor tube 2946. The distributor tube 2946 can be cylindrical, triangular prism, square prism, rectangular prism, or other similar shapes. The distributor tube 2946 includes a first end 2948, which couples to the distributor plate panel 2943 around the distributor plate opening 2944. Figure 34 As shown, the diameter of the first end 2948 of the distributor tube can be larger than the diameter of the manifold opening 2944. The first end 2948 of the distributor tube is configured to receive exhaust gas from the manifold opening 2944. The distributor tube 2946 also includes a second end 2950 of the distributor tube, which is coupled to the end cap surface 2934 of the inlet body inner shell. The exhaust gas received by the first end 2948 of the distributor tube is passed within the distributor tube 2946 to the second end 2950 of the distributor tube.

[0310] The distributor tube 2946 also includes more than one distributor tube orifice 2952 (e.g., perforation, opening, hole, etc.). Each distributor tube orifice 2952 is configured to facilitate exhaust flow from the distributor tube 2946. After exiting the distributor tube 2946, the exhaust flows between the splitter plate 2936, the distributor tube 2946, the inlet body inner shell wall 2932, and the inlet body inner shell end cap surface 2934. In various embodiments, at least some of the distributor tube orifices 2952 are located closer to the second end 2950 of the distributor tube than to the first end 2948 of the distributor tube. In some embodiments, at least a majority (e.g., more than half, all, etc.) of the distributor tube orifices 2952 are located closer to the second end 2950 of the distributor tube than to the first end 2948 of the distributor tube. In various embodiments, the diameter of each distributor orifice 2952 is between one-quarter and one-fiftieth of the diameter of the manifold opening 2944, including one-tenth and one-fiftieth of the diameter of the manifold opening 2944. In some embodiments, the diameter of each distributor orifice 2952 is approximately equal to 6.35 mm, and the diameter of the manifold opening 2944 is approximately equal to 100 mm.

[0311] The manifold panel 2943 also includes a manifold window 2954 (e.g., an opening, orifice, window, etc.). The manifold window 2954 is configured to receive exhaust gas from the inlet body inlet 2906 independently of the manifold opening 2944. The manifold window 2954 facilitates the flow of exhaust gas through the manifold panel 2943, rather than around the manifold panel 2943. After exiting the manifold window 2954, the exhaust gas flows between the manifold 2936, the distributor tube 2946, the inlet body inner shell wall 2932, and the inlet body inner shell end cap surface 2934.

[0312] In an example embodiment, the shape of the manifold window 2954 is similar to a frustoed sector of a circle centered on the inlet body inlet center point 2942. When measured along the inlet body inlet plane 2940 (e.g., from the inlet body inlet center point 2942, etc.), the manifold window 2954 in this embodiment has a seventh sector angle S7. In various embodiments, S7 is approximately equal to an angle between 20° and 90° (inclusive) (e.g., 19°, 20°, 25°, 37°, 40°, 45°, 50°, 90°, 91°, etc.). The manifold window 2954 may be adjacent to the manifold opening 2944 and / or the manifold coupling surface 2938. The manifold window 2954 may also be formed not as a frustoed sector of a circle centered on the inlet body inlet center point 2942, but as a frustoed sector of a circle not centered on the inlet body inlet center point 2942. In addition, the splitter window 2954 may not be a truncated sector shape like a circle, but may be a circle, a square, a triangle or other similar shape.

[0313] The inlet body 2904 also includes a separation panel 2956. The separation panel 2956 is coupled to the manifold panel 2943, the distributor tube 2946, the inlet body inner shell wall 2932, and the inlet body inner shell end cap surface 2934. In various embodiments, the separation panel 2956 is coupled to the manifold panel 2943 along the manifold window 2954. The separation panel 2956 ensures that exhaust gas flowing between the manifold panel 2943, the distributor tube 2946, the inlet body inner shell wall 2932, and the inlet body inner shell end cap surface 2934 must flow through the distributor tube 2946 via the distributor tube orifice 2952 or around the distributor tube 2946 via the manifold window 2954.

[0314] The distributor tube 2946 includes a distributor tube panel portion 2958 and a distributor tube delivery portion 2960, each extending between a first end 2948 and a second end 2950 of the distributor tube. None of the distributor tube holes 2952 are located on the distributor tube panel portion 2958 (e.g., the distributor tube holes 2952 are not located on the distributor tube panel portion 2958). Instead, all the distributor tube holes 2952 are located on the distributor tube delivery portion 2960. Therefore, exhaust cannot pass through the distributor tube panel portion 2958. When measured along the inlet body inlet plane 2940 (e.g., from the inlet body inlet center point 2942, etc.), the distributor tube panel portion 2958 is arranged along an arc having a third central angle τ3. Thus, the distributor tube delivery portion 2960 is arranged along an arc with a central angle equal to 360° - τ3. In various embodiments, τ3 is approximately equal to an angle between 180° and 300° (inclusive) (including 180°, 190°, 200°, 210°, 250°, 270°, 280°, 290°, 300°, 301°, etc.). In some embodiments, τ3 is equal to or greater than S7, and the distributor tube panel portion 2958 and / or the splitter window 2954 are positioned such that, when viewed along the inlet body inlet plane 2940, only the distributor tube panel portion 2958 is included within a sector of a circle centered at the inlet body inlet center point 2942 with a diameter equal to the diameter of the distributor tube 2946, wherein the sector has a sector angle equal to S7 (e.g., the distributor tube delivery portion 2960 is not included within this sector).

[0315] Distributor orifice 2952 is separated from the separator panel 2956 by a thirteenth separation angle φ along a plane parallel to the inlet body inlet plane 2940. 13 In various embodiments, φ 13 Greater than 5°. When measured along the inlet plane 2940 of the inlet body (e.g., from the inlet center point 2942 of the inlet body, etc.), the distributor orifices 2952 are distributed within the eighth sector angle S8. In various embodiments, S8 is approximately equal to an angle in the range of 40° to 100° and including 40° and 100° (e.g., 39°, 40°, 45°, 50°, 90°, 95°, 100°, 101°, etc.).

[0316] The main entrance 2906 is bisected by the bisecting plane 2962 of the main body of the reducing agent delivery system. The bisecting plane 2962 of the main body of the reducing agent delivery system also bisects the main body 2901 of the reducing agent delivery system and intersects with the center point 2942 of the main entrance.

[0317] The inlet body inner shell 2926 also includes an inlet body inner shell flow distribution surface 2963 (e.g., a surface, panel, etc.). The inlet body inner shell flow distribution surface 2963 is adjacent to the inlet body inner shell wall 2932. The inlet body inner shell flow distribution surface 2963 is disposed along a plane substantially parallel to the inlet plane 2940 of the inlet body and is separated from the inlet plane 2940 of the inlet body by a thirteenth distance D. 13 In various embodiments, D 13 Greater than D 12 .

[0318] The inlet body outer mounting shell 2910 also includes an inlet body outer mounting shell flow distribution surface 2964 (e.g., a face, panel, etc.). The inlet body outer mounting shell flow distribution surface 2964 is adjacent to the inner surface 2928 of the inlet body outer mounting shell. The inlet body outer mounting shell flow distribution surface 2964 is disposed along a plane substantially parallel to the inlet plane 2940 of the inlet body and is separated from the inlet plane 2940 of the inlet body by a fourteenth distance D. 14 D 14 Greater than D 13 Furthermore, the outer casing diversion surface 2964 of the inlet body is spaced apart from the inner casing diversion surface 2963 of the inlet body (e.g., separated, etc.). In various embodiments, D 14 Greater than D 12 .

[0319] The inlet body inner shell 2926 also includes an inlet body inner shell protruding surface 2965 (e.g., a face, panel, etc.). The inlet body inner shell protruding surface 2965 is adjacent to the inlet body inner shell wall 2932 and the inlet body inner shell diversion surface 2963.

[0320] The inlet body outer mounting shell 2910 also includes an inlet body outer mounting shell protruding surface 2966 (e.g., a face, panel, etc.). The inlet body outer mounting shell protruding surface 2966 is adjacent to the inlet body outer mounting shell inner surface 2928 and the inlet body outer mounting shell diversion surface 2964. The inlet body outer mounting shell protruding surface 2966 is spaced apart from the inlet body inner shell protruding surface 2965.

[0321] The inlet body outer mounting housing 2910 also includes an inlet body outer mounting housing recess 2968 (e.g., a depression). The inlet body outer mounting housing recess 2968 is opposite to the inlet body outer mounting housing flow distribution surface 2964. The inlet body outer mounting housing recess 2968 includes an inlet body outer mounting housing outer mounting surface 2970 (e.g., a face, panel, etc.). The inlet body outer mounting housing outer mounting surface 2970 is opposite to the inlet body outer mounting housing flow distribution surface 2964.

[0322] The inlet body inner shell 2926 also includes an inlet body inner shell recess (e.g., a depression). The inlet body inner shell recess is opposite to the inlet body inner shell flow distribution surface 2963. The inlet body inner shell recess includes an inlet body inner shell outer mounting surface 2971 (e.g., a face, panel, etc.). The inlet body inner shell outer mounting surface 2971 is opposite to the inlet body inner shell flow distribution surface 2963. The inlet body inner shell outer mounting surface 2971 is spaced apart from the inlet body outer mounting shell outer mounting surface 2970.

[0323] The inlet body outer mounting housing 2910 includes an external injection port 2972 ​​(e.g., an opening, hole, window, etc.). The external injection port 2972 ​​extends through the outer mounting surface 2970 and the diversion surface 2964 of the inlet body outer mounting housing. The external injection port 2972 ​​is configured to receive an injection mount 2974 (e.g., a mounting plate, etc.). The injection mount 2974 is configured to couple to the dispensing module 112 and / or the injector 120, such that the dispensing module 112 and / or the injector 120 are positioned to provide reducing agent to the inlet body outer mounting housing 2910 via the external injection port 2972. The outer mounting surface 2970 of the inlet body outer mounting housing is generally planar and facilitates coupling of the injection mount 2974 in various different orientations to accommodate various configurations of the dispensing module 112 and / or the injector 120.

[0324] The inlet body inner shell 2926 also includes an inner injection port 2973. The inner injection port 2973 extends through the outer mounting surface 2971 and the flow distribution surface 2963 of the inlet body inner shell. The inner injection port 2973 is configured to receive an injection mount 2974 (e.g., a mounting plate, etc.). The injection mount 2974 extends between the outer mounting shell 2910 and the inner shell 2926. The outer mounting surface 2971 of the inlet body inner shell is generally planar and facilitates coupling of the injection mount 2974 in various different orientations to accommodate various configurations of the dispensing module 112 and / or the injector 120.

[0325] The inlet body inner shell 2926 also includes more than one inlet body inner shell hole 2975 (e.g., perforation, opening, hole, etc.) disposed on the end cap surface 2934 of the inlet body inner shell surrounding the distributor tube 2946. Each inlet body inner shell hole 2975 is configured to facilitate exhaust from between the inlet body inner shell 2926 and the inlet body outer mounting shell 2910 and / or from between the inlet body inner shell 2926 and the inlet body outer delivery shell 2916 through into the inlet body inner shell 2926.

[0326] The inlet body inner shell hole 2975 separates from the separation panel 2956 at the fourteenth separation angle φ along a plane parallel to the inlet body inlet plane 2940. 14 In various embodiments, φ14 Greater than 160°. When measured along the entrance plane 2940 of the entrance body (e.g., from the entrance center point 2942 of the entrance body, etc.), the inner shell aperture 2975 of the entrance body is distributed within the ninth sector angle S9. In various embodiments, S9 is approximately equal to an angle between 80° and 180° (inclusive) (e.g., 79°, 80°, 90°, 100°, 140°, 145°, 150°, 180°, 181°, etc.).

[0327] At least some of the inlet body inner shell holes 2975 are aligned with at least some of the distributor tube holes 2952. In various embodiments, at least some of the inlet body inner shell holes 2975 are located closer to the second end 2950 of the distributor tube than to the inlet body inner shell wall 2932. In various embodiments, the diameter of each inlet body inner shell hole 2975 is between one-tenth and one-fifth of the diameter of the manifold opening 2944, including one-tenth and one-fiftieth of the diameter of the manifold opening 2944. In some embodiments, the diameter of each inlet body inner shell hole 2975 is approximately equal to 6.35 mm.

[0328] In various embodiments, the inlet body 2904 also includes a shield assembly 2933 (e.g., a cover, etc.). The shield assembly 2933 is similar to the shield assembly 290. The shield assembly 2933 is disposed along the inlet body outer mounting housing split surface 2964 and is configured to partially shield the reducing agent supplied through the outer injection port 2972 ​​from exhaust gases. The shield assembly 2933 includes a shield flange 2935 (e.g., a strip, etc.). The shield flange 2935 is similar to the shield flange 292. The shield flange 2935 is coupled to the inlet body outer mounting housing split surface 2964 around the outer injection port 2972. The shield flange 2935 extends around the inner injection port 2973. The shield assembly 2933 also includes a shield guide 2937 (e.g., a fin, wall, barrier, etc.). The shield guide 2937 is similar to the shield guide 295. The shield guide 2937 can be coupled to the inlet body inner shell 2926 and the shield flange 2935. A shield inlet 2939 (e.g., a hole, window, aperture, etc.) similar to the shield inlet 296 can be formed between the shield flange 2935, the shield guide 2937, the inlet body inner shell 2926 (e.g., surrounding the inner injection port 2973, etc.), and the inner surface 2928 of the inlet body outer mounting shell. The shield inlet 2939 can receive exhaust gas and supply it to the shield assembly 2933, and thus around the outer injection port 2972. This exhaust gas can help propel the reducing agent away from the separation panel 2956 and around the distributor tube 2946. The shield guide can guide a portion of the exhaust gas flowing between the inlet body inner shell wall 2932 and the inner surface 2928 of the inlet body outer mounting shell and / or between the inlet body inner shell wall 2932 and the inner surface 2928 of the inlet body outer delivery shell into the shield inlet 2939. The shield assembly may also include a shield outlet 2941. Shield outlet 2941 is similar to shield outlet 297. Exhaust can (e.g., after a reducing agent has been provided to the exhaust, etc.) exit the shield assembly 2933 via shield outlet 2941. Shield assembly 2933 may also include a shield plate (e.g., a cover, etc.) similar to shield plate 294. The shield plate may be coupled to shield flange 2935 and inlet body inner shell 2926, but not coupled to inlet body outer mounting shell 2910.

[0329] The inlet body outer transfer housing 2916 includes an inlet body outer transfer housing outlet 2976 (e.g., a hole, opening, etc.). The inlet body outer transfer housing outlet 2976 extends through the inner surface 2930 of the inlet body outer transfer housing and is adjacent to the inner wall 2932 of the inlet body. In various embodiments, the inlet body outer transfer housing outlet 2976 is elliptical. In other embodiments, the inlet body outer transfer housing outlet 2976 is circular, square, rectangular, or other similar shapes.

[0330] The inlet body inner shell 2926 also includes an inlet body inner shell outlet 2978 (e.g., a hole, opening, etc.). The inlet body inner shell outlet 2978 extends through the inlet body inner shell wall 2932 and is adjacent to the inlet body outer transfer shell outlet 2976. In various embodiments, the inlet body inner shell outlet 2978 and the inlet body outer transfer shell outlet 2976 are concentric (e.g., concentric ellipses, concentric circles, etc.). In various embodiments, the inlet body inner shell outlet 2978 is elliptical. In other embodiments, the inlet body inner shell outlet 2978 is circular, square, rectangular, or other similar shapes.

[0331] The reducing agent delivery system body 2901 also includes an inner delivery pipe 2980 (e.g., conduit, tubing, connector, etc.). The inner delivery pipe 2980 is coupled to the outer delivery shell 2916 of the inlet body around the outlet 2976 of the outer delivery shell. The inner delivery pipe 2980 is centered on its central axis 2986. The central axis 2986 extends through the outlet 2976 of the outer delivery shell and the outlet 2978 of the inner shell, intersecting with the inner shell 2926 of the inlet body.

[0332] The central axis 2986 of the inner transfer tube separates from the bisecting plane 2962 of the reducing agent delivery system along a plane parallel to the inlet body inlet plane 2940, at a fifteenth separation angle φ. 15 In various embodiments, φ 15 The angle is 0°, so that the central axis 2986 of the inner conveying tube is parallel to the bipartite plane 2962 of the main body of the reducing agent conveying system.

[0333] The inner delivery pipe 2980 is coupled to the outlet body shell 2988 (e.g., body, frame, etc.) of the outlet body 2990 (e.g., shell, frame, assembly, etc.) of the reducing agent delivery system body 2901. Specifically, the inner delivery pipe 2980 is coupled to the outlet body shell 2988 around the outlet body shell inlet 2992 (e.g., hole, opening, etc.). In various embodiments, the inlet body 2904 is coupled to the outlet body 2990 only through the inner delivery pipe 2980. The outlet body shell inlet 2992 extends through the outlet body shell inner surface 2994 (e.g., face, etc.) of the outlet body shell 2988. In various embodiments, the outlet body shell inlet 2992 is elliptical. In other embodiments, the outlet body shell inlet 2992 is circular, square, rectangular, or other similar shapes.

[0334] The relationship between the outlet main shell inlet 2992, the inlet main body outer conveying shell outlet 2976, and the inlet main body inner shell outlet 2978 makes the reducing agent delivery system 2900 roughly B-shaped.

[0335] The outlet body 2990 does not include an inner shell similar to the inlet body inner shell 2926 or a splitter similar to the splitter 2936. However, the outlet body 2990 includes an outlet body outlet 2996 (e.g., an opening, orifice, etc.). The outlet body outlet 2996 is configured to supply exhaust gas to the exhaust duct system 104. In some embodiments, the reductant delivery system 2900 is positioned upstream of the SCR catalyst member 108 such that the SCR catalyst member 108 receives exhaust gas from the outlet body outlet 2996.

[0336] The outlet body 2990 also includes an outlet body coupler 2998 (e.g., a body, etc.). The outlet body coupler 2998 intersects with the outlet body outlet 2996. The outlet body coupler 2998 is coupled to the exhaust duct system 104 around the outlet body outlet 2996. In various embodiments, the outlet body coupler 2998 is circular.

[0337] The outlet body 2990 also includes a perforated plate 3000 (e.g., a wall, flange, etc.). The perforated plate 3000 extends across the diameter of the outlet body housing 2988. The perforated plate 3000 includes a perforated plate coupling surface 3002 (e.g., a surface, etc.). In various embodiments, the perforated plate coupling surface 3002 is arranged in a circular shape. In other embodiments, the perforated plate coupling surface 3002 is arranged in an elliptical shape.

[0338] The perforated plate 3000 also includes more than one perforated plate perforation 3004 (e.g., hole, opening, aperture, etc.). The perforated plate 3000 is coupled to the outlet body housing 2988 such that exhaust gas flowing out of the outlet body outlet 2996 first passes through the perforated plate 3000 via one of the perforated plate perforations 3004 (e.g., so that no exhaust gas can bypass the perforated plate 3000, etc.).

[0339] The outlet body 2990 also includes a first guide vane 3006 and a second guide vane 3008. The first guide vane 3006 and the second guide vane 3008 extend within the outlet body housing 2988 and toward the inner delivery pipe 2980. The first guide vane 3006 and the second guide vane 3008 are each coupled to at least one of the inner surface 2994 of the outlet body housing, the perforated plate 3000, or the inner delivery pipe 2980.

[0340] The first flow guide 3006 includes a straight portion 3010 and a curved portion 3012. The straight portion 3010 is adjacent to the curved portion 3012. The straight portion 3010 separates the curved portion 3012 from the inner delivery tube 2980. In various embodiments, the straight portion 3010 extends within the inner delivery tube 2980 and the outlet body shell 2988, and the curved portion 3012 extends only within the outlet body shell 2988 (e.g., the curved portion 3012 does not extend into the inner delivery tube 2980, etc.).

[0341] The straight portion 3010 of the first flow guide is centered on the central axis 3014 of the first flow guide. The central axis 3014 of the first flow guide extends through the inlet 2992 of the outlet body shell and the inner conveying pipe 2980. In various embodiments, the central axis 3014 of the first flow guide further extends through the outlet 2976 of the outer conveying shell of the inlet body and the outlet 2978 of the inner shell of the inlet body, and intersects with the inner shell 2926 of the inlet body.

[0342] The central axis 3014 of the first guide vane separates from the bisecting plane 2962 of the reducing agent delivery system along a plane parallel to the inlet body inlet plane 2940, at a separation angle φ. 16 In various embodiments, φ 16 The angle is 0°, such that the central axis 3014 of the first guide is parallel to the bisecting plane 2962 of the main body of the reducing agent delivery system. In some embodiments, φ 16 equal to φ 15 This makes the central axis 2986 of the inner conveying tube parallel to the central axis 3014 of the first guide tube.

[0343] The first guide vane curved portion 3012 gradually bends from the straight portion 3010 of the first guide vane toward the bisecting plane 2962 of the reducing agent delivery system body, and may extend through and beyond the bisecting plane 2962 of the reducing agent delivery system body. At least a portion of the first guide vane curved portion 3012 bends about the central axis 3016 of the first guide vane curved portion. The central axis 3016 of the first guide vane curved portion extends through the inlet plane 2940 of the inlet body. The first guide vane curved portion 3012 is defined by a fifth arc length β5 along a plane orthogonal to the central axis 3016 of the first guide vane curved portion and along which the central axis 3014 of the first guide vane extends.

[0344] The first guide vane 3006 receives exhaust gas from the internal transmission pipe 2980 and gradually rotates the exhaust gas within the outlet body 2990 and upstream of the perforated plate 3000. This rotation enhances the mixing of the reducing agent and the exhaust gas within the outlet body 2990. Furthermore, this rotation increases heat transfer to the reducing agent, thereby increasing its decomposition and reducing the impact of the reducing agent on the various surfaces of the reducing agent delivery system 2900. Additionally, this rotation reduces the back pressure of the reducing agent delivery system 2900 because the momentum of the exhaust gas leaving the internal transmission pipe 2980 is gradually released during the rotation of the exhaust gas within the outlet body 2990 caused by the first guide vane 3006. By selecting φ... 16 And β5, the rotation provided by the first flow guide 3006 can be customized for the target application.

[0345] The second guide vane 3008 includes a straight portion 3020 and a curved portion 3022. The straight portion 3020 is adjacent to the curved portion 3022. The straight portion 3020 separates the curved portion 3022 from the inner delivery tube 2980. In various embodiments, the straight portion 3020 extends within the inner delivery tube 2980 and the outlet body shell 2988, and the curved portion 3022 extends only within the outlet body shell 2988 (e.g., the curved portion 3022 does not extend into the inner delivery tube 2980, etc.).

[0346] The straight portion 3020 of the second guide is centered on the central axis 3024 of the second guide. The central axis 3024 of the second guide extends through the outlet body shell inlet 2992 and the inner conveying pipe 2980. In various embodiments, the central axis 3024 of the second guide further extends through the inlet body outer conveying shell outlet 2976 and the inlet body inner shell outlet 2978, and intersects with the inlet body inner shell 2926.

[0347] The central axis 3024 of the second guide vane separates from the bisecting plane 2962 of the reducing agent delivery system along a plane parallel to the inlet body inlet plane 2940, at a separation angle of seventeenth angle φ. 17 In various embodiments, φ 17 The angle is 0°, so that the central axis 3024 of the second guide is parallel to the bisecting plane 2962 of the main body of the reducing agent delivery system. In some embodiments, φ 17 equal to φ 15 This ensures that the central axis 2986 of the inner delivery tube and the central axis 3024 of the second guide tube are parallel. In some embodiments, φ 17 equal to φ 16 This makes the central axis 3014 of the first flow guide and the central axis 3024 of the second flow guide parallel.

[0348] The second guide bend 3022 gradually bends from the straight portion 3020 of the second guide towards the bisecting plane 2962 of the reducing agent delivery system body, and may extend through and beyond the bisecting plane 2962 of the reducing agent delivery system body. At least a portion of the second guide bend 3022 bends around the central axis 3026 of the second guide bend. The central axis 3026 of the second guide bend extends through the inlet plane 2940 of the inlet body. In some embodiments, the central axis 3026 of the second guide bend is parallel to the central axis 3016 of the first guide bend. The second guide bend 3022 is defined by a sixth arc length β6 along a plane orthogonal to the central axis 3026 of the second guide bend and along which the central axis 3024 of the second guide extends. In some embodiments, β6 is approximately equal to β5.

[0349] The second guide vane 3008 receives exhaust gas from the internal delivery pipe 2980 and gradually rotates the exhaust gas within the outlet body 2990 and upstream of the perforated plate 3000. This rotation enhances the mixing of the reducing agent and the exhaust gas within the outlet body 2990. Furthermore, this rotation increases heat transfer to the reducing agent, thereby increasing its decomposition and reducing impact on the various surfaces of the reducing agent delivery system 2900. Additionally, this rotation reduces the back pressure of the reducing agent delivery system 2900 because the momentum of the exhaust gas leaving the internal delivery pipe 2980 is gradually released during the rotation of the exhaust gas within the outlet body 2990 caused by the second guide vane 3008. By selecting φ... 17 And β6, the rotation provided by the second guide 3008 can be customized for the target application.

[0350] The reducing agent can impact the first deflector 3006 and / or the second deflector 3008. However, since the first deflector 3006 and the second deflector 3008 are immersed in the exhaust gas (e.g., the exhaust gas flows in front of and behind the first deflector 3006, and in front of and behind the second deflector 3008), the first deflector 3006 and the second deflector 3008 can be heated to relatively high temperatures by the exhaust gas. This heating promotes the decomposition of the reducing agent impacting the first deflector 3006 and / or the second deflector 3008.

[0351] In operation, exhaust gas (e.g., from exhaust duct system 104, etc.) flows into inlet body inlet 2906. As described herein, the exhaust gas flowing through reducing agent delivery system 2900 is guided, diverted, and separated in various ways to facilitate enhanced mixing and decomposition of the reducing agent in the exhaust gas and to mitigate the impact of the reducing agent on the various surfaces of reducing agent delivery system 2900. In these ways, reducing agent delivery system 2900 may be more desirable than other systems that do not include similar mechanisms in terms of enhancing the mixing and decomposition of the reducing agent in the exhaust gas and mitigating the impact of the reducing agent (e.g., due to additional cleaning of reducing agent deposits in these systems, etc.).

[0352] A first portion of the exhaust flows through the manifold window 2954 and between the manifold panel 2943, the split panel 2956, the distributor tube panel portion 2958, the inlet body inner shell end cap surface 2934, the inlet body inner shell split surface 2963, and the inlet body inner shell protruding surface 2965, and subsequently flows along the inlet body inner shell split surface 2963, the inlet body inner shell protruding surface 2965, and / or the inlet body inner shell end cap surface 2934, and around the delivery pipe 2946. As the exhaust flows around the delivery pipe 2946, it causes the exhaust to form vortices (e.g., about an axis extending through the inlet body inlet center point 2942 and orthogonal to the inlet body inlet plane 2940). Then, the first portion of the exhaust flows into the inner delivery pipe 2980 via the inlet body inner shell outlet 2978.

[0353] Before flowing into the inner delivery pipe 2980, the first portion of the exhaust gas is supplied with a reducing agent through the outer injection port 2972 ​​and the inner injection port 2973. The reducing agent mixes with the first portion of the exhaust gas, causing the reducing agent and the first portion of the exhaust gas to form a vortex around the delivery pipe 2946.

[0354] The injection assistance portion of the first section of the exhaust can flow into the shroud assembly via a shroud inlet (e.g., between the shroud plate, shroud flange, and protruding surface of the inlet body outer mounting shell, etc.). The injection assistance portion of the exhaust can provide reducing agent via an outer injection port 2972 ​​and an inner injection port 2973 (e.g., from injector 120 and / or dispensing module 112). The injection assistance portion of the first section of the exhaust can then exit the shroud assembly via a shroud outlet. The injection assistance portion of the exhaust can assist in propelling the reducing agent around the delivery pipe 2946. Specifically, the shroud assembly can protect the flow of exhaust and reducing agent exiting the inlet body inner shell end cap surface 2934 from the flow of exhaust toward the inlet body inner shell end cap surface 2934, thereby allowing additional reducing agent to be supplied to the inner delivery pipe 2980 (e.g., instead of being propelled against the inlet body inner shell end cap surface 2934, etc.). In various embodiments, the injection assistance portion may be approximately equal to 5%, 4%, 3%, 2% or other similar values ​​of the total exhaust flow rate entering the inlet body inlet 2906.

[0355] Unlike the exhaust flowing through the manifold window 2954, the second portion of the exhaust flows through the manifold opening 2944 and enters the delivery pipe 2946. The second portion of the exhaust flows from the first end 2948 of the delivery pipe to the second end 2950 of the delivery pipe. Then, the second portion of the exhaust leaves the delivery pipe 2946 through the delivery pipe hole 2952 and merges with the first portion of the exhaust between the manifold panel 2943, the separation panel 2956, the distributor pipe panel portion 2958, the inlet body inner shell end cap surface 2934, the inlet body inner shell flow distribution surface 2963, and the inlet body inner shell protruding surface 2965.

[0356] By separating from the manifold window 2954, the second part of the exhaust merges with the first part of the exhaust after the first part of the exhaust has begun to rotate. Thus, by introducing the second part of the exhaust into the first part of the exhaust, the rotation of the first part of the exhaust is not significantly reduced. Furthermore, at least some of the transfer pipe holes 2952 can be aligned with the inlet body inner shell outlet 2978. Thus, the second part of the exhaust leaving these transfer pipe holes 2952 can push the exhaust toward the inlet body inner shell outlet 2978. The positions of the transfer pipe holes 2952 are chosen such that the exhaust leaving each transfer pipe hole 2952 does not substantially alter the vortex of the exhaust around the transfer pipe 2946. Furthermore, the exhaust flowing within the transfer pipe 2946 (e.g., compared to exhaust that has already been mixed with a reducing agent, etc.) is relatively hot. Thus, the impact of the reducing agent on the transfer pipe 2946 is mitigated.

[0357] Unlike the exhaust flowing through the manifold window 2954 or the exhaust flowing through the manifold opening 2944, the third portion of the exhaust flows between the inner surface 2928 of the outer mounting shell of the inlet body and the inner shell wall 2932 of the inlet body (e.g., between the outer mounting shell 2910 and the inner shell 2926 of the inlet body, etc.) and between the inner surface 2930 of the outer conveying shell of the inlet body and the inner shell wall 2932 of the inlet body (e.g., between the outer conveying shell 2916 and the inner shell 2926 of the inlet body, etc.). The exhaust produces flow along the inner shell wall 2932 of the inlet body, which reduces the impact of the reducing agent on the inner shell wall 2932 of the inlet body (e.g., heating of the inner shell wall 2932 of the inlet body due to the relatively hot exhaust, etc.).

[0358] Some of the exhaust gas flows through the inlet body inner shell orifice 2975 and into the inlet body inner shell 2926, or flows through the inlet body inner shell orifice 2975 and into the transfer pipe 2946. Specifically, some of the inlet body inner shell orifices 2975 are bounded by the transfer pipe 2946 (e.g., external, closed, etc.), while other inlet body inner shell orifices 2975 partially intersect with the transfer pipe 2946 (e.g., external, boundary, etc.). In various embodiments, at least some of the inlet body inner shell orifices 2975 are aligned with at least some of the transfer pipe orifices 2952 (e.g., when viewed along the plane in which the transfer pipe orifice 2952 is disposed, the central axis of the inlet body inner shell orifice 2975 extends across the transfer pipe orifice 2952, and when viewed along the plane in which the inlet body inner shell orifice 2975 is disposed, the central axis of the transfer pipe orifice 2952 extends across the inlet body inner shell orifice 2975, etc.). Therefore, the exhaust gas flowing from the aligned inlet body inner shell bore 2975 and the exhaust gas flowing from the transfer pipe bore 2952 mix and can be guided together toward the inlet body inner shell outlet 2983. Thus, the back pressure of the reducing agent delivery system 2900 can be reduced. The exhaust gas auxiliary transfer pipe 2946, which flows through the inlet body inner shell bore 2975 and into the transfer pipe 2946, guides the exhaust gas into the transfer pipe bore 2952. Therefore, the back pressure of the reducing agent delivery system 2900 can be reduced. Furthermore, the exhaust gas flowing through all the inlet body inner shell bores 2975 (e.g., compared to exhaust gas already mixed with the reducing agent) is relatively hot. Therefore, the impact of the reducing agent on the inlet body inner shell wall 2932 and / or the inlet body inner shell end cap surface 2934 is reduced.

[0359] Some exhaust gas flowing between the inner surface 2928 of the outer casing of the inlet body and the inner casing wall 2932 of the inlet body can be guided into the inlet of the casing by the casing guide.

[0360] The exhaust gas flowing within the inner delivery pipe 2980 flows into the outlet main body shell 2988. The exhaust gas flowing within the outlet main body shell 2988 can flow along the inner surface 2994 of the outlet main body shell to create a vortex. This vortex can be formed by φ 15 Enhancement, φ 15 Effectively allow exhaust gas to flow semi-tangentially (e.g., relative to the axial direction, relative to the radial direction, etc.) into the outlet body housing 2988.

[0361] The first portion of the exhaust gas flowing out of the inner delivery pipe 2980 flows between the straight section 3010 of the first guide vane and the inner surface 2994 of the inner delivery pipe 2980 and / or the outlet body housing. This portion of the exhaust gas flows due to φ 16The exhaust gas enters the outlet body shell 2988 semi-tangentially and is guided along the straight portion 3010 of the first guide to the curved portion 3012 of the first guide. The curved portion 3012 of the first guide causes this portion of the exhaust gas to subsequently form a vortex within the outlet body shell 2988.

[0362] The second portion of the exhaust gas flowing out of the inner conveying pipe 2980 flows between the first guide straight section 3010 and the second guide straight section 3020. This portion of the exhaust gas flows due to φ 17 The exhaust gas enters the outlet main body shell 2988 semi-tangentially and is guided along the straight portion 3020 of the second guide to the curved portion 3022 of the second guide. The curved portion 3022 of the second guide causes this portion of the exhaust gas to subsequently form a vortex within the outlet main body shell 2988.

[0363] Then, the exhaust gas flowing within the outlet body housing 2988 flows through the perforated plate 3000 and exits the outlet body 2990 via the outlet body outlet 2996. By flowing through the perforated plate 3000, the exhaust gas flow can be straightened, thereby enhancing the uniformity of the exhaust gas flowing to components downstream of the reducing agent delivery system 2900 (e.g., SCR catalyst component 108, etc.) of the exhaust aftertreatment system 100.

[0364] The inlet body outer mounting housing 2910 may further include an inlet body outer mounting housing first sensor coupling mount (e.g., a protrusion, etc.). The inlet body outer mounting housing first sensor coupling mount can extend from the outer surface of the inlet body outer mounting housing 2910 (e.g., a protrusion, a projection, etc.). The inlet body outer mounting housing first sensor coupling mount can be located upstream of the outer injection port 2972. Thus, the sensor coupled to the inlet body outer mounting housing first sensor coupling mount can withstand relatively high exhaust flow rates and can be substantially isolated from the reducing agent, thereby enabling accurate measurement results to be obtained from the sensor (e.g., because the sensor is not covered by reducing agent deposits, etc.). In other embodiments, the inlet body outer mounting housing first sensor coupling mount can be located at other locations.

[0365] The reducing agent delivery system 2900 may further include an inlet body outer casing temperature sensor coupler. The inlet body outer casing temperature sensor coupler may be coupled to an inlet body outer casing first sensor coupler and is configured to be coupled to an upstream temperature sensor 138. The inlet body outer casing first sensor coupler may be configured to provide exhaust gas to and / or receive the upstream temperature sensor 138, such that the upstream temperature sensor 138 extends into the inlet body outer casing 2910. The upstream temperature sensor 138 may determine the temperature of the exhaust gas before the exhaust gas flows into the inner delivery pipe 2980.

[0366] The inlet body outer mounting housing 2910 may further include an inlet body outer mounting housing second sensor coupling mount (e.g., a protrusion, etc.). The inlet body outer mounting housing second sensor coupling mount may extend from the outer surface of the inlet body outer mounting housing 2910 (e.g., a protrusion, a projection, etc.). The inlet body outer mounting housing second sensor coupling mount may be centered on an axis extending through the inlet body inlet 2906 (e.g., orthogonal to the inlet body inlet plane 2940, etc.). The reducing agent delivery system 2900 may further include an inlet body outer mounting housing pressure sensor coupling. The inlet body outer mounting housing pressure sensor coupling may be coupled to the inlet body outer mounting housing second sensor coupling mount and is configured to be coupled to pressure sensor 140. The inlet body outer mounting housing second sensor coupling mount may be configured to provide exhaust to and / or receive pressure sensor 140, such that pressure sensor 140 extends into the inlet body outer mounting housing 2910. Pressure sensor 140 may determine the pressure of the exhaust before the exhaust flows into the inner delivery pipe 2980.

[0367] The outlet housing 2988 may also include an outlet housing sensor coupling mount (e.g., a protrusion, etc.). The outlet housing sensor coupling mount may extend from the outer surface of the outlet housing 2988. The outlet housing sensor coupling mount may be centered on an axis extending across the outlet housing 2988. The outlet housing sensor coupling mount may be positioned such that it is opposite to a target position on the inner surface 2994 of the outlet housing (e.g., depending on the application of the reducing agent delivery system 2900, depending on the space requirements of the reducing agent delivery system 2900, etc.).

[0368] The reducing agent delivery system 2900 may also include an outlet body housing temperature sensor coupler. The outlet body housing temperature sensor coupler is coupled to an outlet body housing sensor coupling mount and is configured to couple to a downstream temperature sensor 142. The outlet body housing temperature sensor coupler may be configured to provide exhaust gas to and / or receive the downstream temperature sensor 142, such that the downstream temperature sensor 142 extends into the outlet body housing 2988. The downstream temperature sensor 142 can determine the temperature of the exhaust gas after it (e.g., via the inner delivery pipe 2980, etc.) flows into the outlet body housing.

[0369] It should be understood that, unlike the separate components that are coupled together, the outer mounting shell 2910 and the outer transfer shell 2916 of the inlet body can also be structurally integrated (e.g., formed by an integral construction).

[0370] VII. Explanation of Example Implementations

[0371] While this specification contains many specific implementation details, these should not be construed as limiting the scope of the claims, but rather as descriptions of features specific to particular implementations. Certain features described in the context of individual implementations may also be implemented in combination within a single implementation. Conversely, various features described in the context of a single implementation may also be implemented individually or in any suitable sub-combination in more than one implementation. Furthermore, although features may be described as functioning in certain combinations, and even initially claimed in this way, in some cases one or more features may be removed from the claimed combination, and the claimed combination may involve sub-combinations or variations thereof.

[0372] As used herein, the terms “substantially,” “approximately,” “about,” and similar terms are intended to have a broad meaning consistent with common acceptance by one of ordinary skill in the art to which the subject matter of this disclosure pertains. Those skilled in the art upon reviewing this disclosure will understand that these terms are intended to allow for the description of certain features described and claimed, without limiting the scope of these features to the precise numerical ranges provided. Therefore, these terms should be interpreted as indicating that non-substantial or irrelevant modifications or alterations to the described and claimed subject matter are considered to be within the scope of the invention set forth in the appended claims.

[0373] As used herein, the term "coupling" refers to the direct or indirect connection between two components. Such connection can be fixed (e.g., permanent) or movable (e.g., removable or releasable). Such connection can be achieved by integrating two components or two components and any additional intermediate components into a single unit, or by attaching two components or two components and any additional intermediate components to each other.

[0374] As used herein, the term "fluid coupling" refers to two components or objects having a path formed between them, in which fluids such as air, exhaust gas, liquid reducing agents, gaseous reducing agents, aqueous reducing agents, and gaseous ammonia can flow, with or without intermediate components or objects. Examples of fluid couplers or constructions used to achieve fluid communication may include pipes, channels, or any other suitable components used to allow fluid to flow from one component or object to another.

[0375] It is important to note that the constructions and arrangements of the various systems shown in the various example implementations are illustrative only and not restrictive. All changes and modifications within the spirit and / or scope of the described implementations are intended to be protected. It should be understood that some features may not be required, and implementations lacking multiple features may be contemplated within the scope of this disclosure, defined by the appended claims. When the language "part" is used, the item may include a part and / or the entire item, unless specifically stated to the contrary.

[0376] Furthermore, in a list of elements, the term "or" is used in an inclusive sense (rather than an exclusive sense). Therefore, when the term "or" is used to connect elements, it means one, some, or all of the elements in the list. Connective terms such as "at least one of X, Y, and Z," unless otherwise specifically stated, can be understood from the context of general use to indicate that an item, term, etc., can be X; Y; Z; X and Y; X and Z; Y and Z; or X, Y, and Z (i.e., any combination of X, Y, and Z). Therefore, such connective language generally does not imply that certain embodiments require the presence of each of at least one of X, at least one of Y, and at least one of Z, unless otherwise indicated.

[0377] Furthermore, this document uses value ranges (e.g., W1 to W2, etc.) to include their maximum and minimum values ​​(e.g., W1 to W2 includes W1 and includes W2, etc.) unless otherwise indicated. Additionally, value ranges (e.g., W1 to W2, etc.) do not necessarily require that intermediate values ​​be included within the range (e.g., W1 to W2 may include only W1 and W2, etc.) unless otherwise indicated.

Claims

1. A reducing agent delivery system, comprising: The entrance body includes: - An inlet body coupler surrounding an inlet body inlet, the inlet body inlet being configured to receive exhaust gas. - An outer conveying shell for the inlet body, the outer conveying shell for the inlet body being coupled to the inlet body coupler, the outer conveying shell for the inlet body comprising: -- The inner surface of the outer casing of the main entrance body, and -- The outlet of the outer conveyor shell of the inlet body extends through the inner surface of the outer conveyor shell of the inlet body; - An inlet body outer mounting housing coupled to the inlet body coupler and the inlet body outer transfer housing, the inlet body outer mounting housing and the inlet body outer transfer housing defining an inlet body cavity, the inlet body outer mounting housing including an inner surface; and - Inlet body inner shell, which is contained within the inlet body cavity and is separate from the inner surface of the inlet body outer mounting shell; Exporting entities, including: - An outlet body coupler surrounding an outlet body outlet, the outlet body outlet being configured to provide exhaust gas, and - An outlet body shell, the outlet body shell being coupled to the outlet body coupler, the outlet body shell including an outlet body shell inlet, and An external transfer tube is coupled to the outer transfer shell of the inlet body around the outlet of the outer transfer shell and to the outer transfer shell of the outlet body around the inlet of the outlet body.

2. The reducing agent delivery system according to claim 1, further comprising: An inner conveying tube, which is positioned inside the outer conveying tube and separated from the outer conveying tube; The inner shell of the inlet body includes the inner shell wall of the inlet body; The inlet body inner shell includes an inlet body inner shell outlet extending through the wall of the inlet body inner shell; and The inner delivery pipe is coupled to the inner shell wall of the inlet body around the outlet of the inlet body.

3. The reducing agent delivery system according to claim 1, wherein: The inner shell of the inlet body includes an inner shell wall; and The inlet body also includes a diversion plate, which is at least partially contained within the inner shell wall of the inlet body.

4. The reducing agent delivery system according to claim 3, wherein: The manifold includes a manifold opening configured to receive exhaust gas from the inlet body inlet; The inner shell of the inlet body also includes an end cap surface of the inner shell of the inlet body, which is adjacent to the inner shell wall of the inlet body and separate from the inner surface of the outer mounting shell of the inlet body; The inlet body also includes a distributor tube, which comprises: - A first end of the distributor tube, the first end of which is coupled to the splitter plate around the splitter plate opening, and - The second end of the distributor tube is coupled to the surface of the inner shell end cap of the inlet body.

5. The reducing agent delivery system according to claim 4, wherein, The distributor tube also includes more than one distributor tube orifice, each of the distributor tube orifices being configured to facilitate exhaust flow from the distributor tube out of the distributor tube and to the area between the splitter plate, the distributor tube, the inner wall of the inlet body and the surface of the inner end cap of the inlet body.

6. The reducing agent delivery system according to any one of claims 1-5, wherein, The outer casing of the inlet body also includes: The inlet body has an outer mounting shell with a diversion surface that is adjacent to and extends from the inner surface of the outer mounting shell toward the inner shell of the inlet body. The protruding surface of the outer mounting shell of the inlet body is adjacent to the diversion surface and the inner surface of the outer mounting shell of the inlet body. The injection hole extends through the diversion surface of the outer mounting shell of the inlet body.

7. The reducing agent delivery system according to claim 6, wherein: The inlet body also includes a protective shield assembly, which includes: A protective flange, which partially couples around the injection hole to the protruding surface of the inlet body outer mounting shell, and Protective cover plate, the protective cover plate being coupled to the protective cover flange; The shield inlet is defined between at least one of the inner surface of the outer mounting shell of the inlet body and the protruding surface of the outer mounting shell of the inlet body, the shield flange, and the shield plate; and The shield outlet is defined between the shield flange and the shield plate, and the shield outlet is located above the injection hole.

8. The reducing agent delivery system according to claim 6, further comprising: A dispensing module configured to receive reducing agent; and A spray mounting component, which is coupled to the dispensing module; The outer mounting shell of the entrance body also includes an outer mounting surface of the entrance body outer mounting shell opposite to the protruding surface of the entrance body outer mounting shell; The injection hole is disposed in the outer mounting surface of the outer mounting shell of the inlet body and extends through the outer mounting surface of the outer mounting shell of the inlet body; and The injection mounting component is coupled to the outer mounting surface of the inlet body outer mounting shell around the injection hole.

9. The reducing agent delivery system according to claim 2, wherein: The main entrance is located along the main entrance plane; The inlet body, the outlet body, and the outer conveying pipe are divided into two by the bisecting plane of the reducing agent delivery system body. The bisecting plane of the reducing agent delivery system body is orthogonal to the inlet plane of the inlet body and intersects with the center point of the inlet body that defines the inlet of the inlet body. The inner conveying tube includes: - The curved section of the inner conveyor tube, and - The straight section of the inner conveying tube is adjacent to the curved section of the inner conveying tube; The straight section of the inner conveying tube is centered on the central axis of the inner conveying tube; and When measured along a plane parallel to the inlet plane of the main inlet body, the central axis of the inner delivery pipe is separated from the biplane of the main body of the reducing agent delivery system by less than 50 degrees.

10. The reducing agent delivery system according to claim 9, wherein, The inlet body is coupled to the outlet body only through the external transmission pipe.

11. A reducing agent delivery system, comprising: The entrance body includes: - An inlet body coupler surrounding an inlet body inlet, the inlet body inlet being configured to receive exhaust gas; - An outer conveying shell for the inlet body, the outer conveying shell for the inlet body being coupled to the inlet body coupler, the outer conveying shell for the inlet body comprising: -- The inner surface of the outer casing of the main entrance body, and -- The outlet of the outer conveyor shell of the inlet body extends through the inner surface of the outer conveyor shell of the inlet body; - An inlet body outer mounting shell, the inlet body outer mounting shell being coupled to the inlet body coupler and the inlet body outer transfer shell, the inlet body outer mounting shell and the inlet body outer transfer shell defining an inlet body cavity, the inlet body outer mounting shell including an inner surface of the inlet body outer mounting shell; - An inlet body inner shell, which is contained within the inlet body cavity and is separated from the inner surface of the outer mounting shell of the inlet body. The inlet body inner shell includes: -- The inner shell wall of the main entrance, and -- The surface of the inner shell end cap of the inlet body, which is adjacent to the inner shell wall of the inlet body and separate from the inner surface of the outer mounting shell of the inlet body; and - Distributor tube, the distributor tube comprising: -- First end of the distributor tube, -- The second end of the distributor tube is coupled to the surface of the inner shell end cap of the inlet body, and -- More than one distributor port, each of the distributor ports being configured to facilitate exhaust flow from the distributor pipe out of the distributor pipe and into the area; An outlet body, the outlet body including an outlet body coupler surrounding an outlet body outlet, the outlet body outlet being configured to provide exhaust gas, and A manifold, at least partially contained within the inner shell wall of the inlet body, the manifold including a manifold opening configured to receive exhaust gas from the inlet of the inlet body; Wherein, the first end of the distributor tube is coupled to the splitter plate around the opening of the splitter plate; and The region is located between the diverter plate, the distributor tube, the inner wall of the inlet body, and the surface of the end cap of the inner shell of the inlet body.

12. The reducing agent delivery system according to claim 11, wherein, The outlet body also includes an outlet body shell, which is coupled to the outlet body coupler, and the outlet body shell includes an outlet body shell inlet.

13. The reducing agent delivery system according to claim 12, further comprising: An inner conveying tube is coupled to the outer conveying shell of the inlet body around the outlet of the outer conveying shell of the inlet body, and is coupled to the outlet body shell around the inlet of the outlet body shell; The inlet body inner shell includes an inlet body inner shell outlet extending through the wall of the inlet body inner shell; and The inner delivery pipe is coupled to the inner shell wall of the inlet body around the outlet of the inlet body.

14. The reducing agent delivery system according to claim 13, wherein, The outlet body also includes a flow guide that extends within the outlet body housing toward the inner delivery pipe and is coupled to at least one of the outlet body housing and the inner delivery pipe.

15. The reducing agent delivery system according to any one of claims 11-14, wherein, The outer casing of the inlet body also includes: The inlet body has an outer mounting shell with a diversion surface that is adjacent to and extends from the inner surface of the outer mounting shell toward the inner shell of the inlet body. The protruding surface of the outer mounting shell of the inlet body is adjacent to the diversion surface and the inner surface of the outer mounting shell of the inlet body. The injection hole extends through the diversion surface of the outer mounting shell of the inlet body.

16. The reducing agent delivery system according to claim 15, wherein: The inlet body also includes a protective shield assembly, which includes: - A protective flange, which partially couples around the injection hole to the protruding surface of the inlet body outer mounting shell, and - A protective cover plate, which is coupled to the protective cover flange; The shield inlet is defined between at least one of the inner surface of the outer mounting shell of the inlet body and the protruding surface of the outer mounting shell of the inlet body, the shield flange, and the shield plate; and The shield outlet is defined between the shield flange and the shield plate, and the shield outlet is located above the injection hole.

17. The reducing agent delivery system according to claim 15, further comprising: A dispensing module configured to receive reducing agent; and A spray mounting component, which is coupled to the dispensing module; The outer mounting shell of the entrance body also includes an outer mounting surface of the entrance body outer mounting shell opposite to the protruding surface of the entrance body outer mounting shell; The injection hole is disposed in the outer mounting surface of the outer mounting shell of the inlet body and extends through the outer mounting surface of the outer mounting shell of the inlet body; and The injection mounting component is coupled to the outer mounting surface of the inlet body outer mounting shell around the injection hole.

18. The reducing agent delivery system according to claim 13, wherein: The main entrance is located along the main entrance plane; The inlet body, the outlet body, and the outer conveying pipe are divided into two by the bisecting plane of the reducing agent delivery system body. The bisecting plane of the reducing agent delivery system body is orthogonal to the inlet plane of the inlet body and intersects with the center point of the inlet body that defines the inlet of the inlet body. The inner conveying tube includes: - The curved section of the inner conveyor tube, and - The straight section of the inner conveying tube is adjacent to the curved section of the inner conveying tube; The straight section of the inner conveying tube is centered on the central axis of the inner conveying tube; and When measured along a plane parallel to the inlet plane of the main inlet body, the central axis of the inner delivery pipe is separated from the biplane of the main body of the reducing agent delivery system by less than 50 degrees.

19. The reducing agent delivery system according to claim 18, wherein, The inlet body is coupled to the outlet body only through the external transmission pipe.

20. The reducing agent delivery system according to any one of claims 11-14, 16-19, wherein, The inlet body inner shell also includes more than one inlet body inner shell aperture, which is disposed around the distributor tube on the surface of the inlet body inner shell end cap, each of the inlet body inner shell apertures being configured to facilitate exhaust from at least one of the following: It passes between the inner shell of the inlet body and the outer mounting shell of the inlet body, and enters the inner shell of the inlet body; and It passes between the inner shell of the inlet body and the outer conveying shell of the inlet body, and enters the inner shell of the inlet body.

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