Dispenser mount for exhaust aftertreatment system

Abstract

A dispenser mount includes an annular body portion, a plurality of legs, and a plurality of protrusions. The annular body portion defines a central space. A plurality of legs protrude from a lower surface of the annular body portion and are configured to be coupled to an outer surface of an exhaust conduit. The plurality of protrusions extend from the upper surface of the annular body at a plurality of circumferential locations on the upper surface of the annular body.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of and priority to U.S. Provisional Application No. 63 / 356,128, filed on June 28, 2022, which is incorporated herein by reference in its entirety. Technical Field

[0002] The present disclosure generally relates to a doser mount for an exhaust aftertreatment system of an internal combustion engine. background

[0003] For internal combustion engine systems, it may be desirable to reduce the emission of certain components in the exhaust gas produced by the combustion of fuel. One method that may be implemented to reduce emissions is to treat the exhaust gas using an aftertreatment system. It is often desirable to mix the exhaust gas with a reductant for treating the exhaust gas. However, heat from the exhaust system may be transferred to the dosing module, which may damage the dosing module. SUMMARY OF THE INVENTION

[0004] In one embodiment, the dispenser mount includes an annular body portion defining a central space. The dispenser mount includes a plurality of legs protruding from a lower surface of the annular body portion. The plurality of legs are configured to be coupled to an outer surface of the exhaust conduit. The dispenser mount includes a plurality of protrusions extending from an upper surface of the annular body at a plurality of circumferential positions of the upper surface of the annular body.

[0005] In one embodiment, an exhaust aftertreatment system includes a distributor including an injector. The exhaust aftertreatment system includes a distributor mounting member. The distributor mounting member includes an annular body portion defining a central space. The distributor mounting member includes a plurality of legs protruding from a lower surface of the annular body portion. The plurality of legs are configured to be coupled to an outer surface of an exhaust conduit. The distributor mounting member includes a plurality of protrusions extending from an upper surface of the annular body at a plurality of circumferential positions on an upper surface of the annular body. The distributor is coupled to the distributor mounting member so that the injector is received within the central space.

[0006] In one embodiment, an exhaust aftertreatment system includes an exhaust duct body. The exhaust aftertreatment system includes a distributor mount. The distributor mount includes an annular body portion defining a central space. The distributor mount includes a plurality of legs protruding from a lower surface of the annular body portion. The plurality of legs are configured to be coupled to an outer surface of the exhaust duct. The distributor mount includes a plurality of protrusions extending from an upper surface of the annular body at a plurality of circumferential positions of an upper surface of the annular body. The plurality of legs cooperate with the exhaust duct body to define a plurality of lower channels between the lower surface and the exhaust duct body. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The present disclosure will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, in which like reference numerals refer to like elements unless otherwise indicated, and in which: Figure 1 is a schematic diagram of an exemplary exhaust aftertreatment system including a doser mount; Figure 2 is a schematic diagram of another exemplary exhaust aftertreatment system including a doser mount; Figure 3 is a perspective view of an exemplary exhaust conduit assembly for an exhaust aftertreatment system; Figure 4 is along Figure 3 The plane AA interception in Figure 3 A cross-sectional view of the exhaust duct assembly shown in ; Figure 5 is along Figure 4 The plane BB in the Figure 4 a cross-sectional view of an exhaust duct assembly shown in ; Figure 6 is a perspective view of an exemplary doser mount for an exhaust aftertreatment system; Figure 7 yes Figure 6 A detailed view of detail A shown in; Fig. 8A is a top perspective view of another exemplary doser mount for an exhaust aftertreatment system; Figure 8B is a top perspective view of another exemplary doser mount for an exhaust aftertreatment system; Fig. 9 is a perspective view of another exemplary exhaust conduit assembly for an exhaust aftertreatment system; Fig.10 is a perspective view of another exemplary exhaust conduit assembly for an exhaust aftertreatment system; Fig.11 is along Fig.10 The plane CC in the Fig.10 a cross-sectional view of an exhaust duct assembly shown in ; Fig.12 is a side view of another exhaust duct assembly for an exhaust aftertreatment system; Fig.13A yes Fig.12 a cross-sectional view of a portion of an exhaust duct assembly in FIG. Fig. 13B yes Fig.12 a cross-sectional view of a portion of an exhaust duct assembly in FIG. Fig.14 yes Fig.13A A detailed view of detail B shown in; Fig.15 is a side view of another exhaust duct assembly for an exhaust aftertreatment system; Fig.16 is a cross-sectional view of another exhaust duct assembly for an exhaust aftertreatment system; Fig.17A is a cross-sectional view of a portion of an exhaust aftertreatment system; and Fig. 17B is a cross-sectional view of another exhaust duct assembly for an exhaust aftertreatment system.

[0008] It should be appreciated that for purposes of illustration, the drawings are schematic representations. The drawings are provided for the purpose of illustrating one or more embodiments, with the express understanding that they will not be used to limit the scope or meaning of the claims. Detailed Description

[0009] The following is a more detailed description of various concepts and embodiments related to methods, apparatuses, and embodiments of providing a distributor mounting for an exhaust aftertreatment system for an internal combustion engine. The various concepts introduced above and discussed in more detail below can be implemented in any of a variety of ways, as the concepts described are not limited to any particular embodiment. Examples of specific embodiments and applications are provided primarily for illustrative purposes.

[0010] I. Overview In order to reduce emissions and optimize the performance of an internal combustion engine, it may be desirable to reduce the temperature of a dosing module (e.g., a dosing device) of an exhaust aftertreatment system. For example, it may be desirable to reduce the amount of heat transferred from an internal combustion engine system, such as via a turbocharger, an exhaust conduit, and exhaust gas flowing therethrough, to the dosing module.

[0011] Embodiments herein relate to an exhaust aftertreatment system that implements cooling of a dosing module so that the dosing module can operate well in a high temperature environment. For example, the dosing mount described herein is configured to reduce the heat transferred to the dosing module and to keep the DEF return temperature within an acceptable range. The dosing mount can reduce the heat transferred from the exhaust duct to the dosing module by reducing the contact area between the exhaust duct, the dosing mount, and the dosing module. The dosing mount can provide an open structure to allow more air to move around the dosing module and the dosing mount to transfer heat to the air without transferring heat to the dosing mount and the dosing module. The dosing mount can also increase the distance of the heat transfer path so that the heat must travel a longer distance before reaching the dosing module. The dosing mount can also include additional heat-resistant seals to reduce the heat transferred to the dosing module and eliminate direct contact between the exhaust duct and the dosing module. The embodiments disclosed herein cool the exhaust duct assembly via air and a reduced conductive path to reduce the heat transferred to the dosing module. Cooling can be achieved without the use of additional components (eg, coolant lines).

[0012] Reducing the heat transferred to the dosing module allows the dosing module to be arranged in the system closer to the heat source than would be possible without such cooling. For example, due to the reduced heat transfer path and the ability of air to flow around the dosing mount, the dosing module can be arranged near the internal combustion engine, turbocharger, or other components of the internal combustion engine system that generate heat. These cooling features reduce the heat transferred to the dosing module and protect the dosing module from damage that may occur due to high temperatures. The reduction in heat transferred to the dosing module also helps to keep heat in the exhaust system to heat the catalyst and avoid creating cold spots on the conduit walls that can cause DEF crystallization. The ability to position the dosing module close to the internal combustion engine and / or turbocharger of the system allows the system to combine more dosing modules, which can improve the efficiency and effectiveness of the exhaust aftertreatment system. For example, being able to position the dosing module closer to the heat source allows the system to combine more dosing modules, so that more reductant can be introduced into the exhaust gas to more fully treat the exhaust gas. The embodiments disclosed herein can enhance the operation of a system that uses one of the air-cooled dosing mounts described herein in good conditions.

[0013] The embodiments disclosed herein can be used with either a DEF-cooled or a coolant-cooled dosing module, which enables the use of less expensive dosing technology. Air cooling provides the advantage of locating the dosing module in a hot exhaust temperature area to utilize the heat to decompose the DEF. Additionally, air cooling allows for the addition of a pressure sensor in the dosing module, which can improve dosing accuracy and performance.

[0014] II. Overview of exhaust aftertreatment system Figure 1 and Figure 2 An exhaust aftertreatment system 100 (e.g., treatment system, etc.) for treating exhaust generated by an internal combustion engine 102 (e.g., a diesel internal combustion engine, a gasoline internal combustion engine, a hybrid internal combustion engine, a propane internal combustion engine, a dual-fuel internal combustion engine, etc.) is depicted in accordance with various embodiments. The exhaust aftertreatment system 100 includes an exhaust conduit system 104. The exhaust conduit system 104 is configured (e.g., constructed to, capable of, etc.) to receive exhaust gas from the internal combustion engine 102 and provide the exhaust gas to the atmosphere.

[0015] The exhaust conduit system 104 includes an upstream exhaust conduit 106 (e.g., a line, a pipe, etc.). The upstream exhaust conduit 106 is configured to receive exhaust gas from an upstream component (e.g., a header, an exhaust manifold, a turbocharger, a diesel oxidation catalyst, an internal combustion engine 102, etc.). In some embodiments, the upstream exhaust conduit 106 is coupled to (e.g., attached to, fixed to, welded to, fastened to, riveted to, etc.) the internal combustion engine 102 (e.g., the upstream exhaust conduit 106 is coupled to an outlet of the internal combustion engine 102, etc.). In other embodiments, the upstream exhaust conduit 106 is integrally formed with the internal combustion engine 102. As used herein, two or more elements are "integrally formed" when they are formed and joined together as part of a single manufacturing step to produce a single piece or unitary structure that cannot be disassembled without at least partially destroying the single piece or unitary structure.

[0016] The exhaust aftertreatment system 100 also includes a turbocharger 108. The turbocharger 108 is configured to receive exhaust gas from the internal combustion engine 102. Although not shown, the turbocharger 108 also receives air and provides air to the internal combustion engine 102. The turbocharger 108 uses energy from the exhaust gas generated by the internal combustion engine 102 to provide energy to the air provided to the internal combustion engine 102. Specifically, the turbocharger 108 can pressurize the air provided to the internal combustion engine 102. In some embodiments, the turbocharger 108 includes a compressor impeller coupled to a turbine wheel via a connector shaft, wherein the exhaust gas generated by the internal combustion engine 102 rotates the turbine impeller, and the turbine impeller rotates the shaft and the compressor impeller to compress the air provided to the internal combustion engine 102. By compressing the air, the turbocharger 108 can enable the internal combustion engine 102 to operate with increased power and / or efficiency.

[0017] The exhaust duct system 104 includes an exhaust duct assembly 110. The exhaust duct assembly 110 defines an exhaust gas flow path. Figure 1 and Figure 2As shown, the exhaust duct assembly 110 is coupled to the turbocharger 108. In other embodiments, the exhaust duct assembly 110 is integrally formed with the housing of the turbocharger 108. In some embodiments, the exhaust duct assembly 110 is disposed upstream of the turbocharger 108 (e.g., the exhaust duct assembly 110 provides exhaust gas to the turbocharger 108, etc.). For example, the exhaust duct assembly can be disposed between the internal combustion engine 102 and the turbocharger 108. In some embodiments, the exhaust duct assembly 110 is disposed downstream of the turbocharger 108. For example, exhaust gas can be provided from the turbocharger 108 to the exhaust duct assembly 110, and then provided to other downstream components of the exhaust aftertreatment system 100. As explained in more detail herein, the exhaust conduit assembly 110 is configured to enable introduction of a reductant (e.g., diesel exhaust fluid (DEF), Adblue®, urea-water solution (UWS), aqueous urea solution (e.g., AUS32, etc.) into the exhaust gas to enable subsequent downstream components of the exhaust aftertreatment system 100 to treat the exhaust gas. The exhaust conduit assembly 110 is also configured to enable cooling of a device configured to inject the reductant into the exhaust gas (e.g., the upstream dosing module 116, the downstream dosing module 150 described in more detail herein).

[0018] The exhaust aftertreatment system 100 also includes a reductant delivery system 114. As explained in more detail herein, the reductant delivery system 114 is configured to enable introduction of a reductant (e.g., a reductant, a reductant-air mixture, etc.) into the exhaust. The reductant delivery system 114 includes an upstream dosing module 116 (e.g., a dosing device, a dosing assembly, etc.). The upstream dosing module 116 is configured to enable entry of the reductant into the exhaust duct assembly 110. As explained in more detail herein, the upstream dosing module 116 is configured to receive the reductant, and in some embodiments, is configured to receive air and the reductant, and provide the reductant and / or the air-reductant mixture into the exhaust duct assembly 110 to enable treatment of the exhaust. The upstream dosing module 116 can be coupled to the exhaust duct assembly 110.

[0019] The upstream dosing module 116 includes an injector 118 (eg, introduction device, etc.). The injector 118 is configured to dispense (eg, inject, introduce, etc.) the reductant received by the upstream dosing module 116 into the exhaust gas within the exhaust conduit assembly 110.

[0020] The turbocharger 108 is heated by the exhaust gas during operation of the exhaust aftertreatment system 100. In order to maximize the energy that can be collected from the exhaust gas, it is generally desirable to position the turbocharger 108 as close to the internal combustion engine 102 as possible. Therefore, the exhaust gas received by the turbocharger 108 is relatively hot. Heat from the turbocharger 108 may be transferred to the exhaust duct assembly 110 and thus to the upstream distribution module 116, which causes the temperature of the upstream distribution module 116 to increase. Therefore, the exhaust duct assembly 110 is configured to cool the upstream distribution module 116. Cooling the upstream distribution module 116 enables the upstream distribution module 116 to be placed in a higher temperature environment without being damaged by the higher temperature.

[0021] The reductant delivery system 114 also includes a reductant source 120 (e.g., a reductant tank, etc.). The reductant source 120 is configured to contain a reductant. The reductant delivery system 114 also includes a reductant supply line 122. The reductant source 120 is configured to provide the reductant to the upstream dosing module 116 via the reductant supply line 122. The reductant source 120 may include a plurality of reductant sources 120 (e.g., a plurality of tanks connected in series or in parallel, etc.). The reductant source 120 may be, for example, a reductant containing Adblue. ® The reductant supplied to the upstream dosing module 116 and not injected into the exhaust conduit assembly 110 may be returned to the reductant source 120 via the reductant return line 124. The reductant from the reductant source 120 may be continuously circulated through the reductant supply line 122 and the return line 124 to keep the reductant cool and / or prevent the reductant from freezing.

[0022] The reductant delivery system 114 also includes a reductant pump 126 (e.g., a supply unit, etc.). The reductant pump 126 is configured to receive the reductant from the reductant source 120 and provide the reductant to the upstream dosing module 116. For example, the reductant pump 126 is configured to provide the reductant to the injector 118. The reductant pump 126 is used to pressurize the reductant from the reductant source 120 for delivery to the upstream dosing module 116. In some embodiments, the reductant pump 126 is pressure controlled. In some embodiments, the reductant pump 126 is coupled to a chassis of a vehicle associated with the exhaust aftertreatment system 100.

[0023] In some embodiments, the reductant delivery system 114 further includes a reductant filter 128. The reductant filter 128 is configured to receive the reductant from the reductant source 120 and provide the reductant to the reductant pump 126. The reductant filter 128 filters the reductant before the reductant is provided to the internal components of the reductant pump 126. For example, the reductant filter 128 can inhibit or prevent solids from being transferred to the internal components of the reductant pump 126. In this way, the reductant filter 128 can enable the reductant pump 126 to operate in good condition for a long time.

[0024] In various embodiments, the reductant delivery system 114 further includes an air source 130 (e.g., an air intake, etc.) and an air pump 132. The air pump 132 is configured to receive air from the air source 130. The air pump 132 is configured to provide air to the upstream dosing module 116 via an air supply line 134. The upstream dosing module 116 is configured to mix air and reductant into an air-reductant mixture and provide the air-reductant mixture to an injector 118 (e.g., for dosing into the exhaust gas within the exhaust duct assembly 110, etc.). The injector 118 is configured to receive air from the air pump 132. The injector 118 is configured to dosing the air-reductant mixture into the exhaust gas within the exhaust duct assembly 110. In some of these embodiments, the reductant delivery system 114 further includes an air filter 136. The air filter 136 is configured to receive air from the air source 130 and provide the air to the air pump 132. The air filter 136 is configured to filter the air before the air is provided to the air pump 132. In other embodiments, the reductant delivery system 114 does not include the air pump 132, and / or the reductant delivery system 114 does not include the air source 130. In such embodiments, the upstream dosing module 116 is not configured to mix the reductant with air.

[0025] The exhaust aftertreatment system 100 also includes a controller 138 (e.g., control circuitry, a driver, etc.). The controller 138 is configured to control components of the reductant delivery system 114. For example, the upstream dosing module 116, the reductant pump 126, and the air pump 132 are electrically or communicatively coupled to the controller 138. The controller 138 is configured to control the upstream dosing module 116 to dosing the reductant and / or the air-reductant mixture into the exhaust duct assembly 110. The controller 138 may also be configured to control the reductant pump 126 and / or the air pump 132 to control the reductant and / or the air-reductant mixture dosing into the exhaust duct assembly 110.

[0026] The controller 138 includes a processing circuit 140. The processing circuit 140 includes a processor 142. The processor 142 may include a microprocessor, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), etc. or a combination thereof. The processing circuit 140 also includes a memory 144. The memory 144 may include, but is not limited to, an electronic, optical, magnetic or any other storage device or transmission device capable of providing program instructions to the processor, ASIC, FPGA, etc. The memory 144 may include a memory chip, an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a flash memory, or any other suitable memory from which the controller 138 can read instructions. The instructions may include code from any suitable programming language. The memory 144 may include various modules that include instructions configured to be implemented by the processor 142.

[0027] In various embodiments, controller 138 is configured to communicate with a central controller 146 (eg, engine control unit (ECU), engine control module (ECM), etc.) of an internal combustion engine having exhaust aftertreatment system 100. In some embodiments, central controller 146 and controller 138 are integrated into a single controller.

[0028] In some embodiments, the central controller 146 may communicate with a display device (e.g., a screen, a monitor, a touch screen, a heads up display (HUD), an indicator light, etc.). The display device may be configured to change states in response to receiving information from the central controller 146. For example, the display device may be configured to change between a static state and an alarm state based on communications from the central controller 146. By changing states, the display device may provide an indication of the state of the reductant delivery system 114 to the user.

[0029] In some embodiments, the exhaust aftertreatment system 100 further includes a particulate filter 148 (e.g., a diesel particulate filter (DPF)). The particulate filter 148 is configured to receive exhaust gas from an upstream exhaust conduit (e.g., the exhaust conduit assembly 110). The particulate filter 148 is configured to remove particulate matter, such as soot, from the exhaust gas flowing in the exhaust conduit system 104. The particulate filter 148 includes an inlet, where the exhaust gas is received, and an outlet, where the exhaust gas exits after substantially filtering particulate matter from the exhaust gas and / or converting the particulate matter into carbon dioxide. In some embodiments, the particulate filter 148 may be omitted. In various embodiments, the particulate filter 148 is coupled to the exhaust conduit assembly 110. In other embodiments, the particulate filter 148 is integrally formed with the exhaust conduit assembly 110 (e.g., integrally formed with the exhaust conduit assembly 110, formed as a one-piece structure with the exhaust conduit assembly 110, inseparable from the exhaust conduit assembly 110, etc.).

[0030] In some embodiments, the exhaust duct assembly 110 extends from or is coupled to an outlet of the particulate filter 148. For example, the exhaust duct assembly 110 may be disposed downstream of the particulate filter 148. In some embodiments, the exhaust duct system 104 includes more than one exhaust duct assembly 110. For example, a first exhaust duct assembly 110 may be disposed upstream of the particulate filter 148, and a second exhaust duct assembly 110 may be disposed downstream of the particulate filter 148.

[0031] In the case where the exhaust duct assembly 110 is disposed downstream of the particulate filter 148, the reductant delivery system 114 of the exhaust aftertreatment system 100 may include a downstream dosing module 150. The downstream dosing module 150 may be similar to the upstream dosing module 116. For example, the downstream dosing module 150 receives the reductant from the reductant source 120 (or a different reductant source) and may receive air from the air source 130 (or a different air source) to provide the reductant or reductant mixture to the exhaust. Figure 1 As shown, both the downstream dosing module 150 and the upstream dosing module 116 have a separate reductant supply line 122 extending from the reductant source 120 (or after the reductant pump 126 ) and a separate air supply line 134 extending from the air source 130 (or after the air pump 132 ).

[0032] The downstream dosing module 150 is also electrically or communicatively coupled to the controller 138. The controller 138 is configured to control the downstream dosing module 150 to dosing the reductant and / or the air-reductant mixture into the second exhaust duct assembly 110. The controller 138 may also be configured to control the reductant pump 126 and / or the air pump 132 to control the reductant and / or the air-reductant mixture dosing into the second exhaust duct assembly 110.

[0033] In various embodiments, the exhaust duct system 104 of the exhaust aftertreatment system 100 further includes a decomposition chamber 152 (e.g., a decomposition reactor, a decomposition chamber, a reactor tube, a decomposition conduit, a reactor conduit, etc.). The decomposition chamber 152 is configured to receive the exhaust gas (e.g., after the reductant has been provided to the exhaust gas) and the reductant from the exhaust duct assembly 110 and / or another exhaust duct of the exhaust duct system 104. For example, the decomposition chamber 152 can be coupled to the exhaust duct assembly 110. In other embodiments, the decomposition chamber 152 is integrally formed with the exhaust duct assembly 110.

[0034] The decomposition chamber 152 is configured to convert a reductant into ammonia. The reductant may be, for example, urea, diesel exhaust fluid (DEF), Adblue®, urea water solution (UWS), aqueous urea solution (e.g., AUS32, etc.), and / or other similar fluids. The decomposition chamber 152 includes an inlet and an outlet, the inlet being fluidly connected to the exhaust conduit assembly 110 to receive exhaust gas containing NOx emissions, and the outlet being used for exhaust gas, NOx emissions, ammonia, and / or reductant to flow to downstream components.

[0035] In various embodiments, the exhaust duct system 104 includes a midstream exhaust duct 154. The midstream exhaust duct 154 is disposed downstream of the upstream exhaust duct 106. The exhaust duct system 104 may include more than one midstream exhaust duct 154. The midstream exhaust duct 154 may be configured to couple the decomposition chamber 152 to another component of the exhaust duct system 104 downstream of the decomposition chamber. The midstream exhaust duct 154 defines an exhaust flow path so that exhaust gas can flow from the decomposition chamber 152 to a downstream component. The midstream exhaust duct 154 may be used to couple any components of the exhaust duct system 104 together to provide a path for exhaust gas to flow between components and through the exhaust duct system. For example, if the exhaust aftertreatment system 100 does not include a downstream dosing module 150, the midstream exhaust duct 154 may couple the particulate filter 148 to the decomposition chamber 152 instead of the exhaust duct assembly 110.

[0036] In some embodiments, instead of coupling the decomposition chamber 152 to the downstream component by the midstream exhaust conduit 154, the exhaust conduit system 104 includes another exhaust conduit assembly 110 that couples the decomposition chamber 152 to the downstream component. For example, the exhaust aftertreatment system 100 may include another downstream distribution module 150 disposed between the decomposition chamber 152 and the downstream component. In such an embodiment, the exhaust conduit assembly 110 may couple the decomposition chamber 152 to the downstream component, and the downstream distribution module 150 may be coupled to the exhaust conduit assembly 110.

[0037] In various embodiments, the exhaust gas conduit system 104 of the exhaust gas aftertreatment system 100 includes an SCR catalyst component 156. The SCR catalyst component 156 is located downstream of the decomposition chamber 152 and is configured to receive a mixture of a reductant and exhaust gas. The reductant droplets undergo evaporation, pyrolysis, and hydrolysis processes to form non-NOx emissions (e.g., gaseous ammonia, etc.) within the exhaust gas conduit system 104.

[0038] The SCR catalyst component 156 includes an inlet and an outlet, the inlet is in fluid communication with the decomposition chamber 152, receiving exhaust gas and reductant from the inlet, and the outlet is in fluid communication with a downstream component or an end of the exhaust duct system 104. In various embodiments, the SCR catalyst component 156 is coupled to the decomposition chamber 152. In other embodiments, the SCR catalyst component 156 is integrally formed with the decomposition chamber 152. The SCR catalyst component 156 is located downstream of the decomposition chamber 152 and receives exhaust gas from the decomposition chamber 152. In some embodiments, the SCR catalyst component 156 is fluidly coupled to the decomposition chamber 152 via the exhaust duct assembly 110 or some other exhaust duct of the exhaust duct system 104 (e.g., the midstream exhaust duct 154 described in more detail herein).

[0039] The SCR catalyst component 156 is configured to receive, process, and output exhaust gas output. For example, the SCR catalyst component 156 is configured to cause decomposition of components of the exhaust gas using a reductant (e.g., via a catalytic reaction, etc.). Specifically, the reductant in the exhaust gas that has been provided to the exhaust conduit assembly 110 undergoes a process of evaporation, pyrolysis, and hydrolysis to form non-NOx emissions within the decomposition chamber 152 and the SCR catalyst component 156. The SCR catalyst component 156 is configured to help reduce NOx emissions by accelerating the NOx reduction process between the reductant and NOx in the exhaust gas to convert into diatomic nitrogen, water, and / or carbon dioxide.

[0040] The exhaust aftertreatment system 100 also includes a downstream exhaust conduit 158 ​​(e.g., a line, a tube, etc.). The downstream exhaust conduit 158 ​​is downstream of the midstream exhaust conduit 154. The downstream exhaust conduit 158 ​​is downstream of the SCR catalyst component 156 and is configured to receive exhaust gas from the SCR catalyst component 156. In some embodiments, the downstream exhaust conduit 158 ​​is coupled to the SCR catalyst component 156. In other embodiments, the downstream exhaust conduit 158 ​​is integrally formed with the SCR catalyst component 156.

[0041] Figure 2 Another embodiment of the exhaust aftertreatment system 100 is shown. In such an embodiment, both the upstream dosing module 116 and the downstream dosing module 150 receive reductant from the reductant source 120. The reductant pump 126 first provides the reductant to the upstream dosing module 116 via the reductant supply line 122, and then the reductant supply line 122 extends from the upstream dosing module 116 to the downstream dosing module 150, so that the reductant travels from the upstream dosing module 116 to the downstream dosing module 150. The reductant return line 124 receives the reductant from the downstream dosing module 150 and returns the reductant to the reductant source 120.

[0042] Both the upstream dosing module 116 and the downstream dosing module 150 receive air from the air source 130. The air pump 132 first provides air to the upstream dosing module 116 via the air supply line 134, and then the air supply line 134 extends from the upstream dosing module 116 to the downstream dosing module 150, so that the air travels from the upstream dosing module 116 to the downstream dosing module 150. The air may be released from the downstream dosing module 150, or the reductant delivery system 114 may include an air return line to return the air to the air source 130.

[0043] 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 may be used with other internal combustion engines, such as gasoline internal combustion engines, hybrid internal combustion engines, propane internal combustion engines, dual fuel internal combustion engines, and other similar internal combustion engines.

[0044] Although the reductant delivery system 114 has been shown and described in the context of use with a reductant, it should be understood that the reductant delivery system 114 may alternatively be used with a hydrocarbon fluid (e.g., fuel, lubricant, oil, etc.). In these embodiments, an igniter (e.g., a spark plug, etc.) may be positioned downstream of the upstream dosing module 116 and used to ignite the hydrocarbon fluid. The ignition results in an increase in the temperature of the exhaust gas downstream of the upstream dosing module 116, which may be used to regenerate the SCR catalyst member 156.

[0045] III. Exemplary Exhaust Duct Assemblies Figures 3 to 5 An exhaust duct assembly 110 according to an exemplary embodiment is shown. The exhaust duct assembly 110 includes an exhaust duct body 302. The exhaust duct body 302 defines an exhaust flow path. For example, the exhaust duct body 302 includes an inlet 304. The inlet 304 can be configured to receive exhaust gas from an upstream component (e.g., the turbocharger 108). The exhaust duct body 302 also includes an outlet 306. The downstream component (e.g., the particulate filter 148) can be configured to receive exhaust gas from the outlet 306 so that the exhaust gas flows from the inlet 304 through the exhaust duct body 302 to the outlet 306. In some embodiments, the area of ​​the inlet 304 is the same as the area of ​​the outlet 306 (e.g., the exhaust duct body 302 has a constant cross-sectional area from the inlet 304 to the outlet 306). In some embodiments, the area of ​​the inlet 304 is different from the area of ​​the outlet 306. For example, the area of ​​the inlet 304 can be less than the area of ​​the outlet 306. The area of ​​the inlet 304 can also be greater than the area of ​​the outlet 306. The exhaust duct body 302 can be a straight duct, an offset duct, or a duct of any other shape. For example, the exhaust duct body 302 may be made of 316L or 439L stainless steel. For example, the exhaust duct body 302 may be deep drawn sheet metal or turned.

[0046] In some embodiments, the exhaust duct assembly 110 includes a dispenser mount 308. The dispenser mount 308 can be coupled to the exhaust duct body 302. For example, the exhaust duct assembly 110 can be a two-piece assembly or a three-piece assembly, wherein the dispenser mount 308 is fastened, welded, riveted, or otherwise attached to the exhaust duct body 302. In some embodiments, the dispenser mount 308 is integrally formed with the exhaust duct body 302. For example, the dispenser mount 308 and the exhaust duct body 302 form a single component. The dispenser mount 308 and the exhaust duct body 302 can be directly cast or 3D printed as one piece. When integral with the exhaust duct body 302, the dispenser mount 308 can be made of stainless steel (e.g., 316L or 439L). If not integral with the exhaust duct body 302, the dispenser mount 308 can include other materials (e.g., more insulating materials).

[0047] The dispenser mount 308 enables injection of a reductant into the exhaust duct body 302 to treat the exhaust. For example, the exhaust duct assembly 110 includes an injection hole 310. The injection hole 310 extends through the exhaust duct body 302. The injection hole 310 provides a path for the reductant to enter the exhaust duct body 302. The injection hole 310 can have a conical shape. For example, the inlet of the injection hole 310 can have a smaller area than the outlet of the injection hole 310. The dispenser mount 308 is configured to receive at least a portion of the dosing module 116, 150 so that the injector 118 of the dosing module 116, 150 is aligned with the injection hole 310 and can inject the reductant into the exhaust gas within the exhaust duct body 302.

[0048] The dispenser mount 308 includes an annular body portion 320. The annular body portion 320 may have a circular or arc-shaped shape configured to surround a component. For example, the annular body portion 320 defines a central space 312. The central space 312 extends around the injection hole 310. The central space 312 is configured to receive at least a portion of the dispensing module 116, 150. The shape of the annular body may be at least partially configured to have a shape corresponding to the dispensing module 116, 150. For example, the dispensing module 116, 150 may have a generally circular shape. The annular body portion 320 may have a similar circular shape surrounding the dispensing module 116, 150. The annular body portion 320 may be configured such that the dispensing module 116, 150 may be disposed in the central space 312 without contacting the inner wall of the annular body portion 320 (e.g., disposed away from the inner wall of the annular body portion 320). The annular body portion 320 can provide support for the dispenser mount 308 and provide protection or support for the dispenser modules 116, 150 while reducing the overall size of the dispenser mount 308. Limiting the contact points between the annular body portion 320 and the dispenser modules 116, 150 can reduce the path for heat to be transferred from the dispenser mount 308 to the dispenser modules 116, 150.

[0049] The annular body portion 320 has a lower surface 322 and an upper surface 324. The lower surface 322 is disposed closer to the exhaust duct body 302 than the upper surface 324. The lower surface 322 extends radially outward from the annular body portion 320. The lower surface 322 may extend around the entire circumference of the annular body portion 320. The lower surface 322 has an outer diameter, shown as a lower surface diameter 326. For example, the lower surface diameter 326 may be in the range of 50 mm to 60 mm. The size of the lower surface diameter 326 may be derived according to different applications, force loads, vibrations, thermal analysis or manufacturing requirements, etc.

[0050] The upper surface 324 extends radially outward from the annular body portion 320 (e.g., in a direction away from the central space 312). The upper surface 324 can extend around the entire circumference of the annular body portion 320. The upper surface 324 has an outer diameter, shown as an upper surface diameter 328. For example, the upper surface diameter 328 can be in the range of 43 mm to 53 mm. The size of the upper surface diameter 328 can be derived according to different applications, forces, loads, vibrations, thermal analysis or manufacturing requirements, etc.

[0051] The dispenser mount 308 includes a plurality of legs 330. Each leg 330 protrudes from the lower surface 322. The legs 330 may be configured to be coupled to the outer surface of the exhaust duct body 302. In some embodiments, the legs 330 are integral with the exhaust duct body 302. For example, the annular body portion 320, the legs 330, and the exhaust duct body 302 may be formed as a single unitary structure. The legs 330 may cooperate with the exhaust duct body 302 to define a plurality of lower channels. For example, the legs 330 may extend away from the lower surface 322 toward the exhaust duct body 302 and define a gap between the lower surface 322 and the exhaust duct body 302. The gap may be a lower channel 332. The lower channel 332 is between the lower surface 322 and the exhaust duct body 302. The legs 330 extend from the lower surface 322 at a plurality of circumferential positions of the lower surface 322. Legs 330 extend radially between central space 312 and an exterior (eg, outer edge or perimeter) of lower surface 322 of annular body portion 320. For example, legs 330 may extend from central space 312 to a distance equal to or less than lower surface diameter 326.

[0052] The legs 330 can provide different paths for heat to travel as heat is transferred from the exhaust duct body 302 to other components of the dispenser mount 308. For example, instead of the entire circumference of the annular body portion 320 directly contacting the exhaust duct body 302, only discrete portions (e.g., each of the legs 330) contact the exhaust duct body 302, which reduces the surface area through which heat is transferred. This can reduce the amount of heat transferred to the dispenser mount 308 and ultimately to the upstream dispenser module 116. The lower passage 332, at least partially defined by the legs 330, defines a path for air to contact more surface area of ​​the dispenser mount 308 and enter the central space 312 of the dispenser mount 308 to contact the upstream dispenser module 116. Increasing the air movement around the upstream dispenser module 116 and the dispenser mount 308 can increase the amount of heat that can be removed from the dispenser mount 308 and the upstream dispenser module 116. Instead, the heat can be released into the air.

[0053] The dispenser mount 308 includes a plurality of protrusions 334. The protrusions 334 extend from the upper surface 324 at a plurality of circumferential positions of the upper surface 324. The protrusions 334 extend radially between the central space 312 and the outer portion (e.g., outer edge or periphery) of the upper surface 324 of the annular body portion 320. For example, the protrusions 334 extend radially from the central space 312 to a distance equal to or less than the upper surface diameter 328. In some embodiments, the annular body portion 320, the legs 330, and the protrusions 334 are formed as a single integral structure. The protrusions 334 can be configured to dock (e.g., contact, rest, etc.) with the dispensing modules 116, 150. For example, the upstream dispensing module 116 can include a flange 336. The flange 336 can extend radially around the upstream dispensing module 116. The flange 336 can be configured to dock with the protrusions 334 when a portion of the upstream dispensing module 116 is disposed in the central space 312. The protrusion 334 may enable proper placement of the upstream distribution module 116. For example, the interface between the flange 336 and the protrusion 334 may force the upstream distribution module 116 to be centered within the central space 312 of the dispenser mount 308. The interface between the flange 336 and the protrusion 334 may also be configured to resist external forces (e.g., resist vibration loads).

[0054] The protrusions 334 define a plurality of upper channels 338. For example, the protrusions 334 may cooperate with the upstream dispensing module 116 to define upper channels 338 between the upper surface 324 of the dispenser mount 308 and the flange 336 of the upstream dispensing module 116. There is a gap between each protrusion. The flange 336 may have a planar contact surface that is configured to abut against the top of the protrusion 334. The flange 336 or any portion thereof may not be disposed in the gaps between the protrusions 334. The gaps between the protrusions may be upper channels 338. The upper channels 338 may extend from the periphery of the upper surface 324 (e.g., outside the dispenser mount 308) to the central space 312 of the dispenser mount 308. The upper surface 324 may have any number of protrusions 334. The protrusions 334 may be disposed around the central space 312 of the dispenser mount 308. The protrusions 334 may be evenly spaced so that the upper channels 338 have the same size. In some embodiments, the protrusions are not evenly spaced and the upper channels 338 have different sizes. The upper channels 338 provide a path for air to enter the central space 312. The increased airflow within the central space 312 may cause more heat to be dissipated from the upstream dosing module 116 and the dosing mount 308 into the air.

[0055] The protrusions 334 are configured to reduce the amount of heat transferred to the upstream distribution module 116 and remove heat from the upstream distribution module 116. For example, the protrusions 334 reduce the total contact area between the distributor mount 308 and the upstream distribution module 116. For example, instead of the flange 336 contacting the entire upper surface 324 of the distributor mount 308, the flange 336 contacts only the protrusions 334. The surface area of ​​the protrusions 334 is less than the surface area of ​​the upper surface 324. The protrusions 334 also provide a different path for heat to propagate when it is transferred between components. For example, instead of heat being transferred conductively from anywhere on the upper surface 324, the heat can be transferred conductively only through the protrusions 334. The heat propagates within the upper surface 324 to the protrusions 334 before being transferred to the upstream distribution module 116, which increases the propagation length of the heat, which can delay the transfer of heat to the upstream distribution module 116 and provide more time for the heat to dissipate into the surrounding air.

[0056] The legs 330 and the protrusions 334 are both configured to reduce the amount of heat transferred from the exhaust duct body 302 to the upstream distribution module 116. The legs 330 define a first path for heat to propagate via conduction. The first path is between the exhaust duct body 302 and the distributor mount 308. The protrusions 334 define a second path for heat to propagate via conduction. The second path is between the distributor mount 308 and the upstream distribution module 116. The legs 330 define a lower channel 332 that enables the introduction of external air into the central space 312 at the bottom of the central space 312. The protrusions 334 define an upper channel 338 that enables the introduction of external air into the central space 312 at the top of the central space 312. The lower channel 332 and the upper channel 338 define openings for external air to enter the central space 312. The number of protrusions 334 may be the same as or different from the number of legs 330. The legs 330 are structural components of the dispenser mount 308, and are configured to support the annular body portion 320, the upper surface 324, and the protrusions 334. The protrusions 334 are also structural components of the dispenser mount 308, but are configured to support the upstream dispenser module 116 by contacting the flange 336 and to enable proper placement of the upstream dispenser module 116.

[0057] Figure 6 to Figure 7A dispenser mount 308 or a portion thereof is shown according to an exemplary embodiment. The protrusion 334 of the dispenser mount 308 may have an inner portion 340 and an outer portion 342. The inner portion 340 is closer to the central space 312 than the outer portion 342. The inner portion 340 may define a portion of the central space 312. The inner portion 340 may extend further from the upper surface 324 than the outer portion 342. For example, the protrusion 334 may have a stepped configuration in which the outer portion 342 extends radially along the upper surface 324 for a first distance, and then the protrusion 334 steps up to the inner portion 340, and the inner portion 340 extends radially along the upper surface 324 for a second distance. The first distance may be less than the second distance. The inner portion 340 may extend further from the upper surface 324 than the outer portion 342.

[0058] The flange 336 of the upstream dosing module 116 can be configured to interface with both the inner portion 340 and the outer portion 342 of the protrusion 334. In some embodiments, the flange 336 interfaces with only a portion of the protrusion 334. For example, the flange 336 can include a tip 344 extending axially (e.g., downward, toward the dispenser mount 308) from the flange 336. The tip 344 can extend around the circumference of the flange 336. The tip 344 can be configured to interface with the outer portion 342 of the protrusion 334. The outer portion 342 can support the tip 344 so that a portion of the flange 336 is disposed above the inner portion 340 of the protrusion 334, but does not contact the inner portion 340. For example, a gap is maintained between the inner portion 340 and the flange 336. This reduces direct contact between the components, which can reduce heat transfer. This also provides more paths for air to enter the upstream dosing module 116 and dosing mount 308 and remove heat from the upstream dosing module 116 and dosing mount 308 .

[0059] FIG. 8A to FIG. 8B A dispenser mount 308 is shown according to various exemplary embodiments. In place of the protrusion 334, the dispenser mount 308 may include an inner rim 346. The inner rim 346 may define a portion of the central space 312. The inner rim 346 may extend away from the upper surface 324 such that the inner rim 346 and the upper surface 324 have a stepped configuration. For example, the inner rim 346 may extend radially from the central space 312 toward the outer edge of the upper surface 324, but only extend a portion of the distance of the upper surface 324 such that an outer portion 348 of the upper surface 324 remains exposed. The exposed outer portion 348 of the upper surface 324 may be lower than the top surface of the inner rim 346. The outer portion 348 of the upper surface 324 may provide a continuous contact surface that abuts against the end 344 of the flange 336.

[0060] In some embodiments, the dispenser mount 308 includes a plurality of ribs 350. The ribs 350 extend from an outer portion 348 of the upper surface 324. The ribs 350 may also extend from a side of the inner edge 346. The top surface of the ribs 350 may be disposed below the top surface of the inner edge 346. The ribs 350 may provide a non-continuous contact surface to abut against the end 344 of the flange 336. For example, while the upper surface 324 provides a surface that extends continuously around the inner edge 346, the ribs 350 provide different, separate surfaces that are disposed around the inner edge 346 and are separated from each other. The ribs 350 reduce the contact area between the flange 336 and the dispenser mount 308. For example, the flange 336 contacts only a separate surface of the ribs 350, and does not contact the entire outer portion 348 of the upper surface 324. The outer portion 348 may provide a contact area of ​​more than 180 mm. 2 The sum of the surfaces of the ribs 350 can provide a contact surface of less than 60 mm 2 The reduced contact area can reduce the amount of heat transferred via conduction between the dispenser mount 308 and the upstream dispenser module 116. The ribs 350 can also define pockets 351. The pockets 351 are defined by the gaps between two adjacent ribs 350 and between the upper surface 324 and the end 344 of the flange 336. The pockets 351 allow air to contact more surface area of ​​the dispenser mount 308 to convectively absorb more heat from the dispenser mount 308, thereby preventing heat transfer to the upstream dispenser module 116.

[0061] The upstream distribution module 116 can be coupled to the distributor mount 308. For example, the upstream distribution module 116 can be coupled to the distributor mount 308 so that the injector 118 of the upstream distribution module 116 can be received in the central space 312 of the distributor mount 308. The upstream distribution module 116 can be coupled to the distributor mount 308 via a clamp 352 (e.g., a v-band clamp, a collar, etc.). For example, the upper surface 324 and the flange 336 of the upstream distribution module 116 can be clamped together via the clamp 352. When the upstream distribution module 116 is coupled to the distributor mount 308, the face 354 of the upstream distribution module 116 can directly or indirectly dock with the base 356 of the distributor mount 308. The base 356 can be defined by the outer surface of the exhaust duct body 302. For example, a spacer 358 can be disposed between the face 354 of the upstream distribution module 116 and the base 356. The isolation body 358 may be configured to surround at least a portion of the upstream distribution module 116 (eg, injector 118 , nozzle).

[0062] The insulator 358 achieves a further reduction in heat transfer from the exhaust gas to the upstream distribution module 116. For example, the insulator 358 can prevent the upstream distribution module 116 from directly contacting the hot exhaust duct body 302. The thickness of the insulator 358 can vary to provide more or less isolation (for example, a thicker insulator 358 can provide more isolation). The insulator 358 can also provide a seal between the exhaust duct body 302 and the central space 312 of the distributor mount 308. The seal can prevent exhaust gas from within the exhaust duct body 302 from flowing into the central space 312 and directly contacting the upstream distribution module 116. The insulator 358 can have a thickness 360. The thickness 360 can vary. For example, a larger thickness 360 can reduce heat transfer from the exhaust duct body 302 to the upstream distribution module 116. The thickness 360 can be, for example, in the range of 3 mm to 4 mm. The insulator 358 can also have a seal diameter 362. The seal diameter 362 can be, for example, in the range of 17 mm to 27 mm.

[0063] The mount height 364 may define the distance between the base 356 and the contact surface between the flange 336 and the protrusion 334 (e.g., the outer portion 342 of the protrusion 334). The mount height 364 may be, for example, in the range of 17.5 mm to 18.5 mm. The mount height 364 may be derived based on different applications, force loads, vibrations, thermal analysis or manufacturing requirements, etc.

[0064] Fig. 9 An exhaust duct assembly 110 according to an exemplary embodiment is shown. The annular body portion 320 of the distributor mount 308 may include a plurality of body ribs 366. For example, instead of a solid annular body portion 320, the body ribs 366 extend between the lower surface 322 and the upper surface 324 and define a plurality of central channels 368 that are paths for air to enter the central space 312. The body ribs 366 and central channels 368 may reduce the amount of heat transferred to the upstream distribution module 116 by limiting the paths that heat may travel (e.g., only via the body ribs 366) and allowing additional cooling of the distributor mount 308 and the upstream distribution module 116 via increased air flow.

[0065] Figures 10 to 15 An exhaust duct assembly 110 is shown according to various embodiments. In some embodiments, the distributor mount 308 includes a first member 1002 and a second member 1004. For example, the first member 1002 can be a deep drawn sheet metal part with reinforcing ribs, and the second member 1004 can be a turned part. The first member 1002 can be attached to the second member 1004. For example, the first member 1002 can be welded to the second member 1004.

[0066] The first member 1002 includes a lower portion 1006 of the annular body portion 320 and a plurality of legs 330. The lower portion 1006 can define at least a portion of the central space 312 of the dispenser mount 308. In some embodiments, the lower portion 1006 can have a lower surface 322, and the legs 330 can extend from the lower surface 322 of the lower portion 1006. In some embodiments, the lower portion 1006 can form a continuous member with the legs 330. The legs 330 can extend from the lower portion 1006 in any direction. For example, the legs 330 can have a non-linear shape or orientation to create an indirect path (e.g., not a straight, non-linear path) between the lower portion 1006 and the exhaust duct body 302, thereby creating a longer path for heat to propagate from the exhaust duct body 302 to the lower portion 1006 of the annular body portion 320. For example, the leg 330 may start at the bottom (e.g., the lower surface 322) of the lower portion 1006 and extend upward (e.g., away from the exhaust duct body 302) to a point above the starting position of the leg 330. The leg may then extend back toward the exhaust duct body 302 to couple with the exhaust duct body 302. The longer leg may allow more heat to dissipate into the surrounding air before reaching the second member 1004 and the upstream distribution module 116, which may reduce the amount of heat transferred from the exhaust duct body 302 to the distributor mount 308 and ultimately to the upstream distribution module 116.

[0067] The legs 330 may also provide support for the lower portion 1006 so that the lower portion 1006 is disposed away from and not in contact with the exhaust duct body 302. For example, the only portion of the first member 1002 (and the entire distributor mount 308) that contacts the exhaust duct body 302 is the end of the legs 330. Longer legs 330 may also create more room for air to move around the legs 330 and into the central space 312. More air flow may also increase the amount of heat removed from the distributor mount 308 and the upstream distribution module 116. The legs 330 may have a thin profile to reduce the contact area between the legs 330 and the exhaust duct body 302. The thinner profile may also reduce the amount of heat transferred from the exhaust duct body 302 to the distributor mount 308 and the upstream distribution module 116. The legs 330 may define a restricted heat flux path.

[0068] The second member 1004 includes an upper portion 1008 of an annular body portion 320 and a plurality of protrusions 334. The upper portion 1008 can define at least a portion of the central space 312 of the dispenser mount 308. The upper portion 1008 can have an upper surface 324, and the protrusions 334 can extend from the upper surface 324. The upper portion 1008 can be configured to contact and support the upstream dispensing module 116. For example, the protrusions 334 can dock with the flange 336 of the upstream dispensing module 116. In some embodiments, the protrusion has an inner portion 340 and an outer portion 342. The flange 336 can have a tip 344 that is configured to contact the top surface of the outer portion 342 instead of the top surface of the inner portion 340.

[0069] The upper portion 1008 and the lower portion 1006 of the annular body portion 320 may have the same size. For example, the annular body portion 320 is divided into two equal parts. In some embodiments, the annular body portion 320 is not evenly divided, and the upper portion 1008 and the lower portion 1006 have different sizes.

[0070] The dispenser mount 308 having the first member 1002 and the second member 1004 may have a lower portion diameter 1010. The lower portion diameter 1010 may be, for example, in the range of 67 mm to 77 mm. The dispenser mount 308 may have an upper portion diameter 1012. The upper portion diameter 1012 may be, for example, in the range of 40 mm to 50 mm. The dispenser mount 308 may have a center portion diameter 1014. The center portion diameter 1014 may be, for example, in the range of 35 mm to 45 mm. The dispenser mount 308 may have a sealing diameter 1016. The sealing diameter 1016 may be, for example, in the range of 17 mm to 27 mm. The dispenser mount 308 may have a base diameter 1018. The base diameter 1018 may be, for example, in the range of 15 mm to 25 mm. In some embodiments, the base diameter 1018 is larger than the sealing diameter 1016, such as Figure 4 In some embodiments, the base diameter 1018 is smaller than the sealing diameter 1016. Fig.14 shown.

[0071] In some embodiments, the legs 330 may extend straight from the lower portion 1006, such as Fig.12 The leg 330 may also extend straight from the lower portion 1006, but the leg 330 also has a curved portion 1020, such as Fig.15 The bend 1020 can provide a certain spring effect within the dispenser mount 308 .

[0072] In some embodiments, the dispenser mount 308 is disposed at an angle 1202, such as Figures 12 to 15As shown. For example, the legs 330 of the distributor mount 308 can have different lengths to achieve a desired angle of the distributor mount 308 relative to the exhaust duct body 302. Positioning the distributor mount 308 at an angle 1022 can improve the introduction of the reductant into the exhaust gas in the exhaust duct body 302. For example, the angle 1022 can be determined with the purpose of reducing reductant wall contact and achieving uniform distribution within the exhaust duct body 302. The angle 1022 can be, for example, between 45 degrees and 90 degrees. The angle 1022 can be derived based on exhaust gas velocity, tube size, reductant dosing rate, and reductant spray value, etc.

[0073] Some embodiments include an offset configuration of the exhaust duct body 302 to further achieve improved introduction of the reductant into the exhaust. For example, the offset configuration may include an exhaust duct body 302 having an inlet central axis 1204 disposed at a first position and having an outlet central axis 1206 disposed at a second position. The exhaust duct body 302 includes an offset 1208 between the first position and the second position. The offset 1208 may be derived at least in part from the tube size (e.g., diameter) of the exhaust duct body 302 at the inlet 304 and the outlet 306. For example, the inlet 304 may have an inlet diameter 1210, and the outlet 306 may have an outlet diameter 1212. The inlet diameter 1210 may be different from the outlet diameter 1212. The offset 1208 may also be derived at least in part from the angle 1202, the spray angle, the droplet size of the reductant or reductant mixture, the droplet velocity, and the exhaust gas velocity, etc. The offset 1208 may be determined with the goal of improving chemical reactions between the reductant and other substances within the exhaust aftertreatment system 100 and reducing the amount of deposits formed on the sidewalls of the exhaust conduit body 302 .

[0074] Fig.16 An exhaust duct body 302 having a raised portion 1602 is shown. The raised portion 1602 may define a first injection hole 310. The second injection hole 310 may be separated from the first injection hole 310 and defined by a base 356 of the distributor mount 308. The base 356 may be spaced apart from the outer surface of the exhaust duct body 302. The distributor mount 308 may be disposed above the raised portion 1602 so that the upstream distribution module 116 may be aligned with both the first injection hole and the second injection hole 310. The leg 330 may extend from the exhaust duct body 302 to the annular body portion 320. The leg 330 may define a lower space 1604 disposed between the leg 330 and the outer surface of the exhaust duct body 302. An insulator 358 may be disposed in the lower space 1604 for additional thermal isolation between the distributor mount 308 and the exhaust duct body 302.

[0075] FIG. 17A to FIG. 17B A top member 1702 is shown for use with the exhaust duct assembly 110. The top member 1702 can have a partial double wall defining a recess 1704 configured to receive at least one of the dispenser mount 308 or the upstream dispenser module 116. The top member 1702 can be configured to support the dispenser mount 308. The top member 1702 can replace the legs 330 of the dispenser mount 308. For example, the top member 1702 can provide a path for heat to propagate from the exhaust duct body 302 to the annular body portion 320 of the dispenser mount 308. The top member 1702 can extend around the dispenser mount 308.

[0076] IV. Configuration of Exemplary Embodiments As used herein, unless otherwise indicated, area is measured along a plane (e.g., a two-dimensional plane, etc.). Unless otherwise indicated, the area may vary in a direction not disposed along the plane (e.g., along a direction orthogonal to the plane, etc.).

[0077] Although this specification contains many specific implementation details, these should not be interpreted as limitations on the scope of the content that can be claimed, but should be interpreted as descriptions of features that are unique to a specific implementation. Certain features described in the context of a separate implementation in this specification may also be implemented in combination in a single implementation. On the contrary, the various features described in the context of a single implementation may also be implemented individually or in any suitable sub-combination in multiple implementations. Moreover, although features may be described as working in certain combinations and even initially claimed as such, one or more features from the claimed combination may be deleted from the combination in some cases, and the claimed combination may involve a sub-combination or a deformation of a sub-combination.

[0078] As utilized herein, the terms "substantially," "approximately," "about," and similar terms are intended to have a broad meaning consistent with common and accepted usage by those of ordinary skill in the art to which the subject matter of the present disclosure belongs. Those skilled in the art who review the present disclosure should understand that these terms are intended to allow for a 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 insubstantial or inconsequential modifications or variations of the subject matter described and claimed and are considered to be within the scope of the appended claims.

[0079] As used herein, the term "coupled" and similar terms mean the joining of two components directly or indirectly to one another. Such joining may be fixed (e.g., permanent) or movable (e.g., removable or releasable). Such joining may be achieved by the two components, or the two components and any additional intermediate components, being integrally formed as a single unitary body with one another, or by the two components, or the two components and any additional intermediate components, being attached to one another.

[0080] As used herein, the terms "configured to receive exhaust gas from", "configured to receive air from", "configured to receive reductant from", etc., mean that two components or objects have a path formed between the two components or objects, and a fluid (such as air, reductant, air-reductant mixture, etc.) can flow with or without an intermediate component or object. Examples of fluid couplings or configurations for achieving fluid communication may include pipes, channels, or any other suitable components for achieving the flow of a fluid from one component or object to another component or object.

[0081] It is important to note that the construction and arrangement of the various systems shown in the various example embodiments are merely illustrative and non-restrictive in nature. All changes and modifications within the spirit and / or scope of the described embodiments need to be protected. It should be understood that some features may not be necessary, and embodiments lacking various features may be considered to be within the scope of the present disclosure, which is defined by the appended claims. When the language "a portion" is used, the item may include a portion and / or the entire item unless explicitly stated to the contrary.

[0082] Additionally, in the context of a list of elements, the term "or" is used in its inclusive sense (rather than its exclusive meaning) such that when used in relation to a list of elements, the term "or" means one, some, or all of the elements in the list. Unless explicitly stated otherwise, conjunction language such as the phrase "at least one of X, Y, and Z" is understood in the context to generally convey that an item, term, etc. may 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, unless otherwise indicated, such conjunction language is generally not intended and implies that certain embodiments require that at least one X, at least one Y, and at least one Z each be present.

[0083] In addition, unless otherwise indicated, the range of values ​​used herein (e.g., W1 to W2, etc.) includes the maximum and minimum values ​​of the range (e.g., W1 to W2 includes W1 and includes W2, etc.). In addition, unless otherwise indicated, the range of values ​​(e.g., W1 to W2, etc.) is not necessarily required to include intermediate values ​​within the range of values ​​(e.g., W1 to W2 may only include W1 and W2, etc.).

Claims

1. A dispenser mounting member, comprising: an annular main body portion defining a central space; a plurality of legs projecting from a lower surface of the annular body portion and configured to couple to an outer surface of an exhaust duct body; and A plurality of protrusions extend from the upper surface of the annular body portion at a plurality of circumferential locations of the upper surface of the annular body portion.

2. The dispenser mount of claim 1, further comprising: a first member including the plurality of legs and a lower portion of the annular body portion; and A second member is attached to the first member and includes the plurality of protrusions and an upper portion of the annular body portion.

3. The dispenser mount of claim 1, wherein: The annular body portion, the plurality of legs, and the plurality of protrusions are formed as a single unitary structure.

4. The dispenser mount of claim 1, wherein: The plurality of legs include: The first leg, and a second leg adjacent to the first leg, the second leg cooperating with the first leg, the lower surface, and the outer surface to define a first passage configured to provide passage of air into the central space; and The plurality of protrusions include: The first protrusion, and A second protrusion is adjacent to the first protrusion, the second protrusion cooperates with the first protrusion, the upper surface and the distributor to define a second channel, the second channel is configured to enable passage of air into the central space.

5. The dispenser mount of claim 1, wherein: the plurality of legs including a leg defining a first path for heat to travel from the exhaust duct body to the annular body portion; and The plurality of protrusions include protrusions defining a second path for heat to travel from the annular body portion to a dosing module.

6. The dispenser mount of claim 1, wherein: The lower surface extends radially outward from the annular body portion, each of the plurality of legs extending radially between the central space and an outer edge of the lower surface; and The upper surface extends radially outward from the annular body portion, and each of the plurality of protrusions extends radially between the central space and an outer edge of the upper surface.

7. The dispenser mount of claim 1, wherein: At least one protrusion of the plurality of protrusions includes a stepped configuration, wherein an inner portion of the at least one protrusion extends further from the upper surface than an outer portion of the at least one protrusion.

8. The dispenser mount of claim 1, wherein: The annular body portion includes a plurality of ribs, each rib extending between the lower surface and the upper surface, the plurality of ribs comprising: first rib, and A second rib is adjacent to the first rib, the second rib cooperates with the first rib, the upper surface and the lower surface to define a central channel, the central channel being configured to enable passage of air into the central space.

9. The dispenser mount of claim 1, wherein: The plurality of legs have a non-linear shape.

10. An exhaust aftertreatment system, comprising: a dispenser, the dispenser comprising an injector; and The dispenser mount according to claim 1; wherein: The dispenser is coupled to the dispenser mount such that the injector is received within the central space.

11. The exhaust aftertreatment system according to claim 10, further comprising: The exhaust duct body; wherein: The annular body portion, the plurality of legs, and the exhaust duct body are formed as a single unitary structure.

12. The exhaust aftertreatment system according to claim 11, further comprising: a first member including the plurality of legs and a lower portion of the annular body portion; and A second member is attached to the first member and includes the plurality of protrusions and an upper portion of the annular body portion.

13. The exhaust aftertreatment system according to claim 11, wherein: The dispenser includes a flange configured to interface with the plurality of protrusions of the dispenser mount while a portion of the dispenser is disposed in the central space, the flange and the plurality of protrusions configured to position the dispenser away from an inner wall of the annular body portion.

14. The exhaust aftertreatment system according to claim 13, wherein: at least one protrusion of the plurality of protrusions comprises a stepped configuration having a raised inner portion and a lower outer portion; The flange includes a distal end extending axially from the flange toward the dispenser mount; and The tip abuts the lower outer portion of the at least one protrusion and maintains a gap between the flange and the inner portion of the protrusion.

15. The exhaust aftertreatment system according to claim 14, wherein: The plurality of legs include: The first leg, and A second leg is adjacent to the first leg, the second leg cooperating with the first leg, the exhaust duct body and the lower surface to define a lower passage.

16. The exhaust aftertreatment system according to claim 15, wherein: The plurality of protrusions include: The first protrusion, and A second protrusion is adjacent to the first protrusion, the second protrusion cooperates with the first protrusion, the flange and the upper surface of the dispenser to define an upper channel.

17. The exhaust aftertreatment system of claim 11, wherein: The dispenser mount includes a base defining a first injection aperture; and The exhaust duct body includes a raised portion defining a second injection hole aligned with and spaced apart from the first injection hole.

18. The dispenser mount of claim 11, wherein: The doser mount is positioned at an angle relative to the exhaust conduit body to introduce reductant into the exhaust gas within the exhaust conduit body at a desired angle.

19. An exhaust aftertreatment system comprising: Exhaust duct body; and The dispenser mount according to claim 1; wherein: The plurality of legs cooperate with the exhaust duct body to define a plurality of lower channels between the lower surface and the exhaust duct body.

20. The exhaust aftertreatment system according to claim 6, further comprising: A dispenser, the dispenser comprising an injector; wherein: The plurality of protrusions cooperate with the dispenser to define a plurality of upper channels between the upper surface and the dispenser.

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