Reducing agent introduction arrangement

Abstract

Reducing agent introduction arrangement (200) comprising: a housing (210) comprising: a first segment (212), a second segment (214) comprising an outer shell (234) and defining a channel (228) through it, wherein the outer shell (234) comprises a first arrangement of reducing agent introduction ports (230) fluidically connected to the channel (228) and a second arrangement of reducing agent introduction ports (232) fluidically connected to the channel (228), wherein each of the first arrangement of reducing agent introduction ports (230) is configured to alternate between a first open position and a first closed position and wherein each of the second arrangement of reducing agent introduction ports (232) alternates between a second open position and a second closed position, a reducing agent inlet (226), a reducing agent outlet (224),which is fluidically coupled to the reducing agent inlet (226) via the channel (228), and an actuator arranged within the first segment (212) of the housing (210); a first spray path defined by a plane encompassing a longitudinal axis of the housing (210), wherein the first spray path fluidically connects a first reducing agent inlet opening in the first arrangement of reducing agent inlet openings (230) and the channel (228); and a second spray path defined by the plane encompassing the longitudinal axis of the housing (210), wherein the second spray path fluidically connects a second reducing agent inlet opening in the second arrangement of reducing agent inlet openings (232) and the channel (228); wherein a first angle formed by the first spray path and the longitudinal axis differs from a second angle formed by the second spray path and the longitudinal axis; a reducing agent metering control (300),comprising: an interface circuit (330) that accesses a NOx conversion ratio; and a metering circuit (340) that performs the following operations: calculating, based at least on the NOx conversion ratio, a dose of reducing agent (414); determining a reduction agent supply range in a diesel engine exhaust gas flow range of an aftertreatment system (416); determining an actuation duration (418); and, based at least on the reduction agent supply range and the actuation duration, instructing the housing (210) to open one of the first arrangement of reduction agent inlet openings (230) and the second arrangement of reduction agent inlet openings (232) (420).

Description

[0001] This application claims priority over U.S. Patent Application No. 15 / 473,106, filed on March 29, 2017, which is incorporated herein by reference in its entirety and for all purposes. TECHNICAL AREA

[0002] The present application relates generally to the field of aftertreatment systems for internal combustion engines. BACKGROUND

[0003] In combustion engines, such as diesel engines, nitrogen oxide compounds (NOx) can be produced. x -compounds) are released in the exhaust gas. To reduce NO x -Emissions can be reduced by a selective catalytic reduction (SCR) process to reduce NO xSCR converts oxidizing compounds into more neutral compounds, such as diatomic nitrogen and water, using a catalyst and a reducing agent. The catalyst may be enclosed in a catalyst chamber of an exhaust system, such as that of a vehicle or power generation unit. A reducing agent, such as ammonia anhydride, aqueous ammonia solution, or urea, is typically introduced into the exhaust stream upstream of the catalyst chamber. To introduce the reducing agent for the SCR process, it is injected by a metering module (metering device) that sprays the reducing agent into an exhaust pipe of the exhaust system upstream of the catalyst chamber. The SCR system may include one or more sensors to monitor conditions within the exhaust system. SUMMARY

[0004] The implementations described herein relate to a grouping and method for introducing a reagent (DEF, reducing agent), in particular a nozzle with a variable spray angle, wherein the spray angle and the reagent dosing rate are varied by controlling the reducing agent so that it exits from specified reducing agent introduction ports at specified times.

[0005] One embodiment relates to a variable-angle spray nozzle with a reducing agent inlet grouping in an exhaust aftertreatment system. The nozzle encloses an outer casing that defines a channel through it. The outer casing encloses a first grouping of reducing agent inlet openings, which are fluidically connected to the channel, and a second grouping of reducing agent inlet openings, which are fluidically connected to the channel. Each of the first grouping of reducing agent inlet openings ejects reducing agent from the nozzle at a first angle that differs from a second angle at which each of the second grouping of reducing agent inlet openings ejects the reducing agent from the nozzle. The nozzle shape can be conical. In some implementations, the nozzle shape is stepped conical.The shape can contain multiple levels, and if the shape is stepped conical, each step in the stepped conical shape can define a level. A first level includes the first grouping of reducing agent inlet ports, and a second level includes the second grouping of reducing agent inlet ports. At least one first port of the first grouping of reducing agent inlet ports has a first diameter that differs from a second diameter of at least one second port of the second grouping of reducing agent inlet ports. In some implementations, the nozzle includes a first segment, a second segment including the outer jacket, a reducing agent inlet, and a reducing agent outlet that is fluidically coupled to the reducing agent inlet via the channel. The first and second segments may have the same inner diameter.The second segment of the cylindrical housing includes a first conical rim and a second rim, and the second segment of the cylindrical housing is tightly coupled to the first segment along the second rim.

[0006] Another embodiment relates to a reducing agent introduction grouping that includes a housing. The housing includes a first segment and a second segment. The second segment includes an outer shell and defines a channel through it. The outer shell includes a first grouping of reducing agent introduction ports that are fluidically connected to the channel, and a second grouping of reducing agent introduction ports that are fluidically connected to the channel. Each of the first grouping of reducing agent introduction ports alternates between a first open position and a first closed position, and each of the second grouping of reducing agent introduction ports alternates between a second open position and a second closed position.The housing includes a reducing agent inlet, a reducing agent outlet fluidically coupled to the reducing agent inlet via the channel, and an actuator located within the first segment of the housing. In some implementations, the reducing agent inlet assembly includes a stationary perforated plate positioned within the housing, a rotor positioned on the stationary perforated plate, and a stator positioned within the housing.

[0007] In some implementations, the reducing agent inlet grouping includes a first spray path defined by a plane encompassing a longitudinal axis of the housing. The first spray path fluidically connects a first reducing agent inlet opening in the first grouping of inlet openings to the channel. The reducing agent inlet grouping may further include a second spray path defined by the plane encompassing the longitudinal axis of the housing, the second spray path fluidically connecting a second reducing agent inlet opening in the second grouping of inlet openings to the channel. A first angle formed by the first spray path and the longitudinal axis differs from a second angle formed by the second spray path and the longitudinal axis. The reducing agent inlet grouping includes a reducing agent metering control.The reducing agent dosing control includes an interface circuit for accessing a NO. x -conversion ratio and a NO x -Dosing circuit activated. The NO x The circuit performs the calculation processes, based at least on the NO x -Conversion ratio, a reducing agent dose; defining a reducing agent supply range in a diesel engine exhaust gas flow range of an aftertreatment system; defining an actuation duration; and, based at least on the reducing agent supply range and the actuation duration, instructing the housing to open one of the first grouping of reducing agent inlet ports and the second grouping of reducing agent inlet ports. The NO xThe dosing circuit performs the operations of determining the reducing agent feed range based on an electronic signal value encoding a power parameter. The interface circuit performs the operations of receiving the power parameter, including a value representing the reducing agent flow pressure, and receiving a pressure sensor input value from a pressure sensor located within a housing of the reducing agent dosing system. The NO x -The dosing circuit calculates the reducing agent supply range based on at least the reducing agent flow pressure and the pressure sensor input value.

[0008] The NO xThe metering circuit can, based at least on the reducing agent supply area and the actuation duration, calculate a first path along the first spray path, including selecting the first spray path from a multitude of first grouping paths that fluidically connect a first reducing agent inlet opening in the first grouping of reducing agent inlet openings and the channel. The NO x The metering circuit can, based at least on the reducing agent supply area and the actuation duration, calculate a second path along the second spray path, comprising selecting the second spray path from a plurality of secondary arrangement paths that fluidically connect a second reducing agent inlet port in the second grouping of reducing agent inlet ports and the channel. The reducing agent supply area can include a first supply area and a second supply area, and the NO xThe metering circuit can perform the following operations: determining a first grouping including the first spray path such that the first supply area is defined at least by the first spray path; determining a second grouping including the second spray path such that the second supply area is defined at least by the second spray path; and instructing a diesel exhaust aftertreatment system to activate the second grouping following the activation of the first grouping such that each opening in the second spray path is opened after each opening in the first spray path has been opened. In some implementations, the NO x -The dosing circuit performs the operations of evaluating a width of one of the first grouping of reducing agent inlet openings and selecting one of the first grouping of reducing agent inlet openings to open based at least on the width and on the specified penetration depth.

[0009] Another embodiment relates to a method which enables the reception, through an interface circuit of a reducing agent dosing control, of an NO x -conversion ratio included. Based at least on the NO x -Conversion ratio calculates a NO x The dosing circuit of the reducing agent dosing control determines a dose of reducing agent, defines a reducing agent supply range within a diesel engine exhaust stream range of an aftertreatment system, and sets an actuation duration. Based at least on the reducing agent supply range and the actuation duration, the NO x-Dosing circuit: a reducing agent dosing system with a first grouping of reducing agent inlet ports and a second grouping of reducing agent inlet ports, to open one of the ports from the first grouping of reducing agent inlet ports and the other from the second grouping of reducing agent inlet ports. In some implementations, the NO x The dosing circuit of the reducing agent dosing control system involves rotary actuation of the reducing agent dosing system by engaging a rotor positioned on a stationary perforated plate. The stationary perforated plate is located within a housing of the reducing agent dosing system.

[0010] In some implementations, a first path along a first spray path is calculated based on at least the reducing agent supply area and the actuation duration. The first spray path is selected from a variety of first grouping paths that fluidically connect a first reducing agent inlet opening in the first grouping of reducing agent inlet openings and a channel defined by a housing. Based on at least the reducing agent supply area and the actuation duration, a second path along a second spray path is calculated. The second spray path is selected from a variety of second grouping paths that fluidically connect a second reducing agent inlet opening in the second grouping of reducing agent inlet openings and the channel.The first path and the second path are determined such that the first path and the second path are each positioned on a plane encompassing a longitudinal axis of the housing such that a first angle formed by the first path and the longitudinal axis differs from a second angle formed by the second path and the longitudinal axis. List of characters

[0011] The details of one or more implementations are set forth in the accompanying drawings and the description below. Further features, aspects, and advantages of the disclosure will become apparent from the description, the drawings, and the claims, for which the following applies: Fig. Figure 1 is a block diagram of an exemplary aftertreatment system, which includes an exemplary reducing agent supply system for an exhaust system; Fig.Figure 2A is a schematic cross-sectional view of an exemplary grouping for reducing agent introduction, comprising a nozzle with a variable spray angle in an exemplary embodiment; Fig. 2B presents various operating modes of a device for introducing reducing agents, such as with reference to Fig. 2A, Fig. 5 and Fig. 6 discussed; Fig. Figure 3 is a block diagram of a reducing agent dosing control in an exemplary embodiment, wherein the exemplary reducing agent dosing control comprises at least one processor, one memory, one interface circuit and one NO. x -Dosing circuit includes; Fig. Section 4 presents an exemplary procedure for supplying NO. x -Reducing agent in a reducing agent introduction grouping according to a specific embodiment; Fig.Figure 5 represents an exemplary device for the introduction of a reducing agent with rotary actuation according to an exemplary embodiment; Fig. Figure 6 represents another exemplary device for the introduction of reducing agents with rotary actuation according to an exemplary embodiment.

[0012] It should be noted that some or all of the figures are schematic representations for illustrative purposes. The figures are provided to illustrate one or more implementations with the explicit understanding that they are not to be used to limit the scope or meaning of the claims. DETAILED DESCRIPTION

[0013] More detailed descriptions of various concepts and implementations of a grouping and method for introducing a reducing agent, in particular a variable-angle nozzle, follow below. The spray angle and the reducing agent dosage rate are varied by controlling the release of the reducing agent from defined reduction agent introduction ports. The various concepts presented above and described in detail below can be implemented in numerous ways, as the described concepts are not limited to a specific implementation method. Examples of specific implementations and applications are provided primarily for illustrative purposes. Overview

[0014] Methods, devices, assemblies, and / or systems are provided to improve certain performance characteristics of an aftertreatment system, including, for example, reagent dosing and spray angle in exhaust aftertreatment systems that use a reducing agent. In particular, a nozzle assembly is electronically configured to supply reducing agent at a variable spray angle, and a group of spray nozzles can be used individually where a higher degree of precision is required to control reducing agent deposits. A reducing agent supply assembly may include a single-injection actuator comprising a single armature, a single needle, a single plate, and other components to streamline the process of manufacturing the assembly. Overview of the post-treatment system

[0015] Fig. 1 represents a post-treatment system 100with an exemplary reducing agent supply system 110 for an exhaust system 190 The post-treatment system 100 includes a particulate filter 102 (such as a diesel particulate filter (DPF)), as well as the reducing agent supply system 110 , a decomposition chamber or a reactor 104 , an SCR catalyst 106 and a sensor 150 .

[0016] The particulate filter 102 It is configured in such a way that fine dust, for example soot, is removed from the exhaust system. 190 is removed from the flowing exhaust gas. The particulate filter 102 includes an inlet where the exhaust gas is taken in and an outlet through which the exhaust gas escapes after particulate matter has been substantially filtered out of the exhaust gas and / or particulate matter has been converted into carbon dioxide.

[0017] The decomposition chamber 104It is configured to convert a reducing agent such as urea or diesel exhaust fluid (AdBlue) into ammonia. The decomposition chamber 104 closes the reducing agent supply system 110 with a dosing module 112 one that is configured to introduce the reducing agent into the decomposition chamber 104 to dose. In some implementations, the reducing agent is added to the SCR catalyst. 106 The reducing agent droplets are introduced upstream. They then undergo the processes of evaporation, thermolysis, and hydrolysis to produce gaseous ammonia within the exhaust system. 190 to form. The decomposition chamber 104 closes an inlet in fluid connection with the particle filter 102 one, to absorb the exhaust gas, the NO x -emissions, as well as an outlet for the exhaust gas, NO x -Emissions, ammonia and / or remaining reducing agent for flow to the SCR catalyst 106.

[0018] The decomposition chamber 104 This connects to the decomposition chamber 104 attached dosing module 112 one, so that the dosing module 112 the reducing agent can be dosed into the exhaust gases, which are in the exhaust system 190 flow. The dosing module 112 can be an insulator 114 include, which is between a section of the dosing module 112 and the section of the decomposition chamber 104 is arranged on which the dosing module 112 is mounted. The dosing module 112 is fluidic with one or more reducing agent sources 116 coupled. In some implementations, a pump is used. 118 used to remove the reducing agent from the reducing agent source 116 for the supply to the dosing module 112 to put them under pressure.

[0019] The dosing module 112 and the pump 118are also electrically or communicatively connected to a control system 120 coupled. The control 120 is configured to use the dosing module 112 to control reducing agents in the decomposition chamber 104 to dose. The control 120 can also be used to control the pump 118 be configured. The control 120 It can include a microprocessor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), etc., or combinations thereof. The controller 120The memory may include, among other things, an electronic, optical, magnetic, or other data storage or transmission device capable of providing program instructions to a processor, ASIC, FPGA, etc. The memory may include a memory chip, electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), flash memory, or other suitable memory from which the controller can retrieve program instructions. 120 It can read instructions. The instructions can include code from any suitable programming language.

[0020] The SCR catalyst 106 is configured to reduce NO x -to contribute to emissions by reducing NO x -Reduction process between ammonia and NOx The conversion of the exhaust gas into diatomic nitrogen, water and / or carbon dioxide is accelerated. The SCR catalyst 106 closes an inlet in fluid communication with the decomposition chamber 104 , from which exhaust gas and reducing agent are received, and an outlet in fluid connection with one end of the exhaust system 190 a.

[0021] The exhaust system 190 It may also include an oxidation catalyst (e.g. a diesel oxidation catalyst (DOC)) in fluid connection with the exhaust system. 190 (e.g. the SCR catalyst) 106 downstream or the particle filter 102 upstream) to oxidize hydrocarbons and carbon monoxide in the exhaust gas.

[0022] In some implementations, the particle filter 102 the decomposition chamber or the reactor tube 104 positioned downstream. For example, the particle filter 102 and the SCR catalyst106 be combined in a single unit. In some implementations, the dosing module can be 112 instead, it may be positioned downstream of or upstream of a turbocharger.

[0023] The sensor 150 is connected to the exhaust system 190 coupled to a state of the exhaust gas that passes through the exhaust system 190 to detect the flow. In some implementations, the sensor can 150 one within the exhaust system 190 arranged part, e.g., a tip of the sensor 150 into a part of the exhaust system 190 The process can occur. In other implementations, the sensor can... 150 Exhaust gas is received through another pipe, such as a sampling tube that is connected to the exhaust system. 190 progresses. While the sensor 150 is presented in such a way that it is connected to the SCR catalyst 106 Since it is downstream, it goes without saying that the sensor 150at other positions in the exhaust system 190 , including the particulate filter 102 upstream, in the particle filter 102 , between the particulate filter 102 and the decomposition chamber 104 , within the decomposition chamber 104 , between the decomposition chamber 104 and the SCR catalyst 106 , in the SCR catalyst 106 or the SCR catalyst 106 It can be arranged downstream. Additionally, two or more sensors can be used. 150 They can be used to detect a condition of the exhaust gas, such as two, three, four, five or six sensors. 150 , where each sensor 150 at one of the aforementioned positions in the exhaust system 190 is arranged. Implementations of grouping and procedures for NO x -Reducing agent dosing with variable spray angle nozzle

[0024] Fig.Figure 2A shows a schematic cross-sectional view of an exemplary grouping. 200 for the introduction of a reducing agent, comprising a nozzle with a variable spray angle, in an exemplary embodiment. The in Fig. Grouping shown in 2A 200 includes a housing 210 , which is a first segment 212 and a second segment 214 includes. In certain implementations, the first segment includes 212 an actuator casing 216 such that an actuator is located inside the housing 210 is arranged. The second segment 214 includes an outer shell 234 , which in some implementations is monolithic with the case 210 is.

[0025] The actuator is any suitable mechanism for moving the grouping. 200implemented in a reducing agent supply state as described herein. For example, in some embodiments the actuator is linear and can be a solenoid. 218 , an anchor 220 and a pestle 222 include those in Fig. 2A. In other embodiments, the actuator may include a motor, as shown, for example, in Fig. 5 to Fig. Figure 6 shows. In other embodiments, the actuator is rotatable and comprises a rotor and a stator located inside the housing. 210 are positioned, for example in Fig. 5 to Fig. 6 shown.

[0026] The group 200 also includes a reducing agent outlet 224 and a reducing agent inlet 226 The reducing agent outlet 224 is fluidic with the reducing agent inlet 226 coupled. In some implementations, the reducing agent outlet is 224via a through the outer shell 234 specific channel 228 through the case 210 fluidically through the reducing agent inlet 226 coupled. In some implementations, the channel 228 through the first segment 212 of the case 210 determined. In other implementations, the channel 228 through the second segment 214 of the case 210 definitely. In other implementations, the channel 228 through both the first segment 212 as well as the second segment 214 of the case 210 certainly.

[0027] The second segment 214 includes a first grouping of reducing agent introduction ports 230 and a second grouping of reducing agent introduction ports 232 The first grouping of reducing agent introduction ports 230 and the second grouping of reducing agent inlet openings232 They can be arranged regularly in separate levels. Thus, in some implementations, a first level encloses the first grouping of reducing agent inlet ports. 230 One and a second level enclose the second grouping of reducing agent inlet openings. 232 one. In some implementations, the nozzle shape is stepped conical, with each step representing a distinct level. In certain embodiments, each opening in the first grouping is a reducing agent introduction opening. 230 configured to introduce reducing agent at an angle different from the angle at which each opening in the second grouping of reducing agent introduction openings 232 the reducing agent is supplied. In some embodiments, the second segment comprises a third grouping of reducing agent introduction openings. 236, which is regularly arranged in yet another separate plane and configured to supply reducing agent at an angle that differs from one or both of the respective angles at which the first grouping of reducing agent introduction ports 230 and the second grouping of reducing agent inlet openings 232 supply the reducing agent. In some embodiments, each opening in the first grouping is a reducing agent introduction opening. 230 , the second grouping of reducing agent introduction ports 232 and the third grouping of reducing agent introduction ports 236 configured to be in a closed position by default when the grouping 200is in an inactive state, and to move into an open position for reducing agent supply to a reducing agent supply area in an exhaust gas flow area of ​​an aftertreatment system when the grouping 200 is in an active state. In some implementations, the first grouping of reducing agent introduction ports 230 , the second grouping of reducing agent introduction ports 232 and the third grouping of reducing agent introduction ports 236 through the outer shell 234 certainly.

[0028] In the Fig. The housing is shown in group 2A. 210 the group 200 cylindrical such that the first segment 212 and the second segment 214 , here including the outer shell 234Considered, the inner diameters are approximately the same. In particular, in some embodiments, the radius of a circular cross-section of the first segment is 212 , taken at any point of the first segment 212 , equal to the radius of a circular cross-section, taken at any point of the second segment 214 In other embodiments, the length of each linear segment in a non-circular cross-section of the first segment is 212 , taken at any point of the first segment 212 , equal to the length of each corresponding linear segment in a non-circular cross-section, taken at any point of the second segment 214 .

[0029] In some implementations, the case 210 the group 200 conical in such a way that the second segment 214 of the case 210includes a first conical rim and a second rim, and the second segment 214 The casing is rigidly coupled (monolithically) to the first segment along the second edge. 212 In particular, in some embodiments the radius of a circular cross-section of the first segment 212 , taken at any point of the first segment 212 , greater than the radius of a circular cross-section, taken at any point of the second segment 214 In other embodiments, the length of at least one linear segment in a non-circular cross-section of the first segment is 212 , taken at any point of the first segment 212 , greater than the length of the corresponding linear segment in a non-circular cross-section, taken at any point of the second segment 214 In other embodiments, the second segment 214of the case 210 stepped conical.

[0030] Fig. 2B presents certain exemplary operating modes of a device for introducing reducing agents, such as one which, with respect to Fig. 2A, Fig. 5 and Fig. Section 6 is discussed. As shown, the top view represents 250 the device 200 from Fig. 2, the device 500 from Fig. 5 or the device 600 from Fig. 6. The elements 252a , 252b , 254a , 254b , 256a and 256b This represents three pairs of reducing agent inlet ports in, for example, an upper plate, with each pair of reducing agent inlet ports being activated according to different configurations. The bottom view 290 appoint the holes 258a and 258b The configuration 260 shows the first pair of reducing agent inlet ports. 252aand 252b for example in a base plate, wherein the reducing agent introduction openings 252a and 252b together as a grouping of reducing agent inlet openings 275 be activated. The configuration 270 shows the second pair of reducing agent inlet ports. 254a and 254b , which together form a grouping of reducing agent introduction ports 285 is activated. The configuration 280 The third pair of reducing agent inlet ports is shown. 256a and 256b , which together form a grouping of reducing agent introduction ports 295 is activated. In some embodiments, a first channel is provided between any of the reducing agent introduction ports. 252a , 254a and 256a and the hole 285b formed, and a second channel is located between any of the reducing agent introduction ports. 252b , 254b and 256band the hole 285a The design allows the reducing agent to pass through. In some embodiments, when a reducing agent inlet opening is actuated, it introduces the reducing agent at an angle that differs from the angles of the other reducing agent inlet openings. This angle is relative to the central axis. 258 .

[0031] In some embodiments, each set of pairs of reducing agent introduction ports is located in different layers, which are in Fig. The reducing agent inlet ports shown in Figure 2A are positioned such that when one pair of ports is open, the remaining pairs of ports are closed. In certain embodiments, the first pair of ports comprises 252a and 252b an inner grouping of reducing agent introduction ports in relation to the center 258the configuration, as shown in the top view, such that the inner grouping of reducing agent inlet ports is closest to the center compared to other reducing agent inlet ports 258 The second pair of reducing agent introduction ports is located. 254a and 254b includes a medium grouping of reducing agent inlet openings in relation to the center 258 the configuration as shown in the top view. The third pair of reducing agent inlet ports. 256a and 256b includes an outer grouping of reducing agent introduction ports in relation to the center 258 the configuration, as shown in the top view, such that the outer grouping of reducing agent inlet ports is furthest from the center compared to other reducing agent inlet ports 258 is removed. In such embodiments, the reducing agent introduction openings are 252a , 252b ,254a , 254b , 256a and 256b radially aligned (arranged in pairs) so that they are approximately equidistant from the center point 258 are removed. In certain embodiments, the reducing agent introduction openings are 252a , 252b , 254a , 254b , 256a and 256b axially aligned in such a way that an approximately straight line passes through both of the reducing agent introduction openings and the center point 258 The process is as follows. In some embodiments, if one grouping is open, other groupings of reducing agent introduction ports remain closed, so that only one grouping of reducing agent introduction ports is active at any given time. When the grouping 200 If not activated, all groups of reducing agent inlet openings are closed.

[0032] Fig. 3 shows a block diagram of a reducing agent dosing control system300 in an exemplary embodiment, wherein the exemplary reducing agent dosing control 300 at least one processor 310 , a storage 320 , an interface circuit 330 and a NO x -Dosing circuit 340 includes the reducing agent dosing control. 300 is configured as described in reference to Fig. 4 described.

[0033] Fig. Section 4 presents an exemplary procedure for supplying NO. x -Reducing agent in a reducing agent introduction grouping according to a specific embodiment. 401 A pump will be provided. 402 A housing (e.g. the housing) 210 from Fig. 1) provided. At 404 An actuator is provided and positioned inside the housing. 406 A reducing agent dosing control (e.g., the reducing agent dosing control) is used. 300) provided.

[0034] At 412 A fixed NO will be x -Conversion ratio through the interface circuit 330 received by the reducing agent dosing control. In some embodiments, the NO x -Dosing circuit 340 the reducing agent dosing control 300 configured to be based at least on the NO x -Conversion ratio to calculate a reducing agent dose (at 414 ), to define a reducing agent supply range in a diesel engine exhaust gas flow range of an aftertreatment system (at 416 ), to determine an operating duration (at 418 ) and based at least on the reducing agent supply range and the duration of operation, the grouping 200 to instruct one of the first grouping of reducing agent introduction ports 230 and the second grouping of reducing agent inlet openings 232to open (at 420). In some embodiments, the control unit (shown at 300) controls the pump. 116 for a constant flow of reducing agent during the operating and non-operating periods.

[0035] In some embodiments, the NO x -Dosing circuit 340 furthermore configured to provide a rotary actuation of the grouping 200 to achieve this by grouping 200 is instructed to intervene in a rotor that is mounted on a stationary perforated plate inside the housing. 210 the group 200 is positioned.

[0036] In some embodiments, the NO x -Dosing circuit 340furthermore configured to calculate a first path along a first spray path based at least on the reducing agent supply area and the actuation duration, comprising selecting the first spray path from a plurality of first grouping paths that include a first reducing agent inlet opening in the first grouping of reducing agent inlet openings 230 and the canal 228 Connect fluidically. The NO x -Dosing circuit 340 is further configured to calculate a second path along a second spray path based at least on the reducing agent supply area and the actuation duration, comprising selecting the second spray path from a plurality of second grouping paths that fluidically connect a second reducing agent inlet opening in the second grouping of reducing agent inlet openings and the channel.

[0037] In some embodiments, the first path and the second path are through the NO x The metering circuit is configured such that the first and second paths are each positioned on a plane encompassing a longitudinal axis of the housing, such that the first angle formed by the first path and the longitudinal axis differs from the second angle formed by the second path and the longitudinal axis. This allows for the setting of different spray angles to precisely target a defined coverage area.

[0038] In some embodiments, the NO x -Dosing circuit 340 Furthermore, it is configured to define multiple feed areas and multiple corresponding groupings, and to activate the groupings at different times. Such a grouping can include at least one path and one performance parameter. The path is defined by the NO x -Dosing circuit340 designed to: (1) calculate the path, (2) open injection / inlet ports located along the path, and (3) supply reducing agent. The performance parameter determined by the NO x -Dosing circuit 340 The parameter used to determine a grouping can include, in any suitable combination, the following: a value representing a specified spray cone angle, reducing agent flow velocity, or reducing agent flow pressure. A non-exhaustive list of configurable grouping features is also available. 200is listed below. Under the condition of a low exhaust gas flow rate in one exemplary implementation, a large, low-flow reductant spray angle, a short penetration depth, and a low velocity contribute to better mixing with low-flow, low-density exhaust gas. Under the condition of a high exhaust gas flow rate in another exemplary implementation, a small, high-flow reductant spray angle, a long penetration depth, and a high velocity contribute to better mixing with high-flow, high-density exhaust gas. Performance parameters Condition of low exhaust gas flow rate (low speed, low density) Condition of a high exhaust gas flow rate (high velocity, high density) Configurable features Spray cone angle Large Small Angle of the insertion openings Penetration depth Short Long Diameter of the insertion openings throughput Low High Number of insertion openings, opening time Flow velocity Low High Diameter of the insertion openings Pressure Low High P-sensor, pump control Spray density Low High Combination of the above

[0039] Fig. 5 to Fig. Figure 6 presents additional exemplary embodiments with different rotary actuation modes. Fig. Figure 5 represents an exemplary device 500The device is for the introduction of a reducing agent with rotary actuation according to an exemplary embodiment. 500 includes a reducing agent housing 503 , which has a reducing agent inlet 504 and a reducing agent outlet 505 features. In some embodiments, the opening allows 506 Maintaining the pressure required for the introduction of reducing agent. In certain embodiments, the rotor 502 through a gear mechanism 507 actuated. In some embodiments, a rotary actuator is part of a grouping that actuates a stationary perforated plate, such as one referred to in Fig. 6 described, includes those within the housing of the device 500 is positioned such that the rotor 502 is positioned on the stationary perforated plate. In some embodiments, the actuator is guided by the Fig.3 shown reducing agent dosing control 300 activated in such a way that the reducing agent dosing control 300 a rotary actuation of the grouping 500 by interfering with the rotor 502 caused by the device 500 can also include a stator 501 include, which has holes that correspond to the counter holes of the rotor 502 correspond. The structure can also accommodate an engine. 508 include, which is in the case 509 is positioned. The case 509 It may also contain a gear mechanism.

[0040] Fig. 6 presents another exemplary device 600 The device is for the introduction of a reducing agent with rotary actuation according to an exemplary embodiment. 600 includes a steel casing 601 , which has a reducing agent inlet 602 and a reducing agent outlet 603 features the opening 610It enables the maintenance of the pressure required for the introduction of reducing agent. In some embodiments, the housing further encloses a set of plates, including a top plate. 604 , a rotor plate 605 and a nozzle plate 606 , one. In some embodiments, the upper plate 604 adjacent to and on the rotor plate 605 positioned to support a rotary actuation mechanism, such as one based on Fig. 5 described, provides. The top plate 604 supports the rotor plate 605 , by containing the bearing. Furthermore, the upper plate directs 604 the flow of reducing agent through holes to the rotor plate 605 The rotor plate can be fixed or removable to the housing. 601 be coupled. The nozzle plate 606 is a three-dimensional structure that has holes 620a and 620bdetermined. The device 600 is via a drive gear 611 activated by a motor 609 is activated. The engine 609 is in the engine housing 607 positioned and can be an electric motor.

[0041] Although this patent specification contains many specific implementation details, these should not be interpreted as limitations on the scope of what can be claimed, but rather as descriptions of features specific to certain implementations. Certain features described in this patent specification in the context of separate 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 separately in multiple implementations or in any suitable subcombination.Furthermore, although the foregoing features may be described in such a way as to function in certain combinations and may initially be claimed as such, in some cases one or more features from a claimed combination may be excluded from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination.

[0042] Similarly, while operations are depicted in the drawings in a particular order, this should not be interpreted as requiring these operations to be performed in that specific order or sequentially, or as requiring all illustrated operations to be performed to achieve desirable results. Under certain circumstances, the separation of different system components in the implementations described above cannot be understood as requiring such separation in all implementations, and it should be clear that the described components and systems may generally be integrated into a single product or embodied and packaged in multiple products on tangible media.

[0043] The term "controller" includes all types of equipment, devices, and machines for processing data, including, for example, a programmable processor, a computer, a system-on-a-chip (SoC), or several of these, a section of a programmable processor, or combinations thereof. The device may include a purpose-built logic circuit, such as an FPGA or an ASIC.

[0044] In addition to hardware, the device may also include code that creates an execution environment for the computer program in question, such as code representing processor firmware, a protocol stack, a database management system, an operating system, a cross-platform runtime environment, a virtual machine, or a combination of one or more of these. The device and the execution environment can implement various different computing infrastructures, such as distributed computing and grid computing infrastructures.

[0045] The terms “essentially” and similar terms used herein are intended to have a broad meaning consistent with their usual and accepted usage by those skilled in the art in the field to which this disclosure relates. It is obvious to those skilled in the art reading this disclosure that these terms are intended to permit a description of certain described and claimed features without limiting the scope of those features to the precise numerical ranges provided. Accordingly, these terms are to be interpreted as indicating that inessential or minor modifications or alterations to the described and claimed subject matter are to be considered to fall within the scope of the invention as set forth in the accompanying claims.Additionally, it is noted that limitations of the claims in the event that the term "means" is not used therein are not to be interpreted as "means plus function" limitations under US patent law.

[0046] The term "coupled" and the like, as used herein, means the direct or indirect connection of two components. This connection can be stationary (e.g., permanent) or movable (e.g., removable or detachable). This connection can be achieved by the two components, or the two components and any further intermediate components, being integrally formed as a single, unified body, or by the two components, or the two components and any further intermediate components, being attached to one another.

[0047] The terms “fluid-coupled” or “fluid-connected” and the like, as used herein, mean that the two components or objects have a path formed between them in which a fluid, such as water, air, gaseous reducing agent, gaseous ammonia, etc., can flow, either with or without intervening components or objects. Examples of fluid couplings or configurations for enabling fluid connection may include pipes, channels, or any other suitable components for allowing a fluid to flow from one component to the other.

[0048] It is important to note that the construction and grouping of the system shown in the various exemplary implementations are merely illustrative and not limiting. It is desired that all changes and modifications falling within the spirit and / or scope of the described implementations be protected. It is understood that some features are not necessary, and implementations lacking these features are considered to fall within the scope of the application, which is defined by the following claims. When reading the claims, it is intended that the use of words such as "a," "an," "at least a," or "at least a section" / "at least a part / section," and their declensions, does not intend to limit the claim to only one subject matter unless expressly stated otherwise in the claim.Where the terms “at least one section” / “at least one share / part” and / or “one section” / “one share / part” are used, the subject matter may include one section / one share / part and / or the entire subject matter, unless expressly stated otherwise. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] US 15473106

[0001]

Claims

[1] Nozzle of a reducing agent introduction group in an exhaust aftertreatment system, the nozzle comprising: an outer sheath defining a channel through it, wherein the outer sheath comprises a first grouping of reducing agent introduction ports fluidically connected to the channel and a second grouping of reducing agent introduction ports fluidically connected to the channel; wherein each of the first grouping of reducing agent inlet openings ejects reducing agent from the nozzle at a first angle which differs from a second angle at which each of the second grouping of reducing agent inlet openings ejects the reducing agent from the nozzle. [2] Nozzle according to claim 1, wherein the shape of the nozzle is conical. [3] Nozzle according to claim 1, wherein the shape of the nozzle is stepped conical. [4] Nozzle according to claim 1, wherein the shape of the nozzle determines a plurality of levels and wherein a first level in the plurality of levels comprises the first grouping of reducing agent introduction openings and a second level in the plurality of levels comprises the second grouping of reducing agent introduction openings. [5] Nozzle according to claim 1, wherein at least one first opening of the first grouping of reducing agent inlet openings has a first diameter which differs from a second diameter of at least one second opening of the second grouping of reducing agent inlet openings. [6] Nozzle according to claim 1, wherein the nozzle comprises a cylindrical housing, the cylindrical housing comprising the following: a first segment, a second segment, comprising the outer shell, a reducing agent inlet and a reducing agent outlet which is fluidically coupled to the reducing agent inlet via the channel; where the first segment and the second segment have the same inner diameter. [7] Nozzle according to claim 6, wherein the second segment of the cylindrical housing comprises a first conical rim and a second rim and wherein the second segment of the cylindrical housing is rigidly coupled to the first segment along the second rim. [8] Reducing agent introduction grouping, comprising: a housing, comprising: a first segment, a second segment comprising an outer shell and defining a channel through it, the outer shell comprising a first grouping of reducing agent introduction ports fluidically connected to the channel, and a second grouping of reducing agent introduction ports, which are fluidically connected to the channel, wherein each of the first grouping of reducing agent introduction ports is configured to to switch between a first open position and a first closed position, wherein each of the second grouping of reducing agent introduction ports switches between a second open position and a second closed position, a reducing agent inlet a reducing agent outlet which is fluidically coupled to the reducing agent inlet via the channel, and an actuator located within the first segment of the housing. [9] Reducing agent introduction grouping according to claim 8, further comprising: a stationary perforated plate that is positioned inside the housing; a rotor positioned on the stationary perforated plate; and a stator that is positioned inside the housing; where the actuator is a rotary actuator. [10] Reducing agent introduction grouping according to claim 8, further comprising: a first spray path defined by a plane encompassing a longitudinal axis of the housing, wherein the first spray path is a first The reducing agent inlet in the first group of reducing agent inlets and the channel fluidically connects; and a second spray path defined by the plane encompassing the longitudinal axis of the housing, wherein the second spray path fluidically connects a second reducing agent inlet opening in the second grouping of reducing agent inlet openings and the channel; wherein a first angle formed by the first spray path and the longitudinal axis differs from a second angle formed by the second spray path and the longitudinal axis. [11] Reducing agent introduction grouping according to claim 8, further comprising a reducing agent dosing control, wherein the reducing agent dosing control comprises: an interface circuit that responds to a NO x -conversion ratio accesses; and a NO x -Dosing circuit, which performs the following operations: Calculate, based at least on the NO x -Conversion ratio, of a reducing agent dose; Defining a reducing agent supply range in a diesel engine exhaust gas flow range of an aftertreatment system; Setting a duration of activity; and based at least on the reducing agent supply area and the duration of operation, instructing the housing to open one of the first grouping of reducing agent supply ports and the second grouping of reducing agent supply ports. [12] Reducing agent introduction grouping according to claim 11, wherein the NO x -The dosing circuit performs the processes of determining the reducing agent supply range based on an electronic signal value that encodes a performance parameter. [13] Reducing agent introduction grouping according to claim 12, wherein the interface circuit performs the following operations: Receiving the performance parameter, which includes a value representing a reducing agent flow pressure; and Receiving a pressure sensor input value from a pressure sensor located inside a housing of the reducing agent dosing system; and where the NO x -The dosing circuit calculates the reducing agent supply range based on at least the reducing agent flow pressure and the pressure sensor input value. [14] Reducing agent introduction grouping according to claim 11, wherein the NO x-The dosing circuit performs the following operations: Based at least on the reducing agent supply area and the operating time, calculate a first path along the first spray path, comprehensively selecting the first spray path from a multitude of first grouping paths that fluidically connect a first reducing agent introduction port in the first grouping of reducing agent introduction ports and the channel; and Based at least on the reducing agent supply area and the actuation duration, calculate a second path along the second spray path. comprehensive the selection of the second spray path from a multitude of second grouping paths, which fluidically connect a second reducing agent inlet opening in the second grouping of reducing agent inlet openings and the channel. [15] Reducing agent introduction grouping according to claim 14, wherein the reducing agent supply area comprises a first supply area and a second supply area and wherein the NO x -The dosing circuit performs the following operations: Determining a first grouping, encompassing the first spray path, such that the first supply area is defined at least by the first spray path; Determining a second grouping, comprising the second spray path, such that the second supply area is defined at least by the second spray path; and Instructing a diesel exhaust aftertreatment system to activate the second grouping following the activation of the first grouping such that each opening in the second spray path is opened after each opening in the first spray path has been opened. [16] Reducing agent introduction grouping according to claim 8, wherein the NO x-The dosing circuit performs the following operations: Evaluating a width of one of the first groupings of reducing agent introduction ports; and Selecting one of the first grouping of reducing agent inlet openings to open based at least on the width and on the specified penetration depth. [17] Procedures, including: Received, through an interface circuit of a reducing agent dosing control, an NO x -conversion ratio; based at least on the NO x -Conversion ratio, calculate, by a NO x -Dosing circuit of the reducing agent dosing control, one reducing agent dose; Determine by the NO x -Dosing circuit of the reducing agent dosing control, of a reducing agent supply area in a diesel engine exhaust gas flow area of ​​an aftertreatment system; Determine by the NO x-Dosing circuit of the reducing agent dosing control, one actuation duration; and based at least on the reducing agent supply range and the duration of operation, instructions to be given by the NO x -Dosing circuit of the reducing agent dosing control, of a reducing agent dosing system, wherein the system has a first grouping of reducing agent introduction openings and a second grouping of reducing agent inlet ports includes one opening from the first grouping of reducing agent inlet ports and the second grouping of reducing agent inlet ports. [18] The method of claim 17, further comprising causing by the NO x-Dosing circuit of the reducing agent dosing control, a rotary actuation of the reducing agent dosing system by engaging a rotor that is positioned on a stationary perforated plate, wherein the stationary perforated plate is positioned within a housing of the reducing agent dosing system. [19] The method of claim 17, further comprising: based at least on the reducing agent supply area and the actuation duration, calculating a first path along a first spray path, wherein the first spray path is selected from a plurality of first grouping paths that fluidically connect a first reducing agent supply port in the first grouping of reducing agent supply ports and a channel defined by a housing; and based at least on the reducing agent supply area and the actuation duration, calculating a second path along a second spray path, wherein the second spray path is selected from a plurality of second grouping paths that fluidically connect a second reducing agent inlet opening in the second grouping of reducing agent inlet openings and the channel; wherein the first path and the second path are determined such that the first path and the second path are each positioned on a plane encompassing a longitudinal axis of the housing such that a first angle formed by the first path and the longitudinal axis differs from a second angle formed by the second path and the longitudinal axis.