CN211666794U

CN211666794U - Baffle for reductant delivery system

Info

Publication number: CN211666794U
Application number: CN201921830110.5U
Authority: CN
Inventors: 普里扬卡·维诺德·切尔; 亚什·帕尔; 吉瑞达拉恩·巴拉库马尔; 达瓦尔·R·谢斯; 乔伊迪普·迪帕克·查克拉巴蒂; 张松
Original assignee: Cummins Emission Solutions Inc
Current assignee: Cummins Emission Solutions Inc
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-10-13
Anticipated expiration: 2029-10-28

Abstract

The present application relates to a baffle for a reductant delivery system. A baffle for a reductant delivery system includes a baffle flange and a perforated plate. The perforated plate is at least partially defined by a baffle flange. The perforated plate includes a first outer portion, a central portion, a second outer portion, a first partition portion, and a second partition portion. The first outer section includes a plurality of first outer section fins and a plurality of first outer section holes. The central portion includes a plurality of central portion fins and a plurality of central portion holes. The second outer portion includes a plurality of second outer portion fins and a plurality of second outer portion holes. The first separating portion extends between the first outer portion and the central portion. The second partition portion extends between the central portion and the second outer portion.

Description

Baffle for reductant delivery system

Technical Field

The present application relates generally to a baffle for a reductant delivery system of an exhaust aftertreatment system of an internal combustion engine.

Background

For internal combustion engines (e.g., diesel engines), Nitrogen Oxides (NO)_x) Compounds may be emitted in the exhaust gas. For example, it may be desirable to reduce NO_xEmissions to comply with environmental regulations. To reduce NO_xEmissions, reductant may be dosed into the exhaust gas by a dosing system within the exhaust aftertreatment system. The reductant helps to convert a portion of the exhaust gas to non-NO_xEffluents, e.g. nitrogen (N)₂) Carbon dioxide (CO)₂) And water (H)₂O) to reduce NO_xAnd (4) discharging.

SUMMERY OF THE UTILITY MODEL

In one embodiment, a baffle for a reductant delivery system includes a baffle flange (flange) and a perforated plate. The perforated plate is at least partially defined by a baffle flange. The perforated plate includes a first outer portion, a central portion, a second outer portion, a first partition portion, and a second partition portion. The first outboard portion includes a plurality of first outboard portion fins (fin) and a plurality of first outboard portion holes. The central portion includes a plurality of central portion fins and a plurality of central portion holes. The second outer portion includes a plurality of second outer portion fins and a plurality of second outer portion holes. The first separating portion extends between the first outer portion and the central portion. The second partition portion extends between the central portion and the second outer portion.

In another embodiment, a baffle for a reductant delivery system includes a baffle flange and a perforated plate. The baffle plate flange includes a first baffle plate flange curved portion, a second baffle plate flange curved portion, a first baffle plate flange connection portion, a first baffle plate flange corner portion, a second baffle plate flange corner portion, and a second baffle plate flange connection portion. The first baffle plate flange connection portion is arranged along a straight line and is adjacent to the first baffle plate flange curved portion and the second baffle plate flange curved portion. The first baffle flange corner portion abuts the first baffle flange curved portion. The second shutter flange corner portion abuts the second shutter flange curved portion. The second baffle flange connection portion is arranged along a line parallel to the first baffle flange connection portion. The second baffle flange connecting portion abuts the first baffle flange corner portion and the second baffle flange corner portion. The second baffle flange connection portion is separated from the first baffle flange curved portion by a first baffle flange corner portion, and is separated from the second baffle flange curved portion by a second baffle flange corner portion. The perforated plate is at least partially defined by a baffle flange. The perforated plate includes a central portion including a plurality of central portion fins and a plurality of central portion holes.

Aspects of the disclosure may be implemented in one or more of the following embodiments:

1) a baffle for a reductant delivery system, the baffle comprising:

a baffle flange; and

a perforated plate at least partially defined by the baffle flange, the perforated plate comprising:

a first outer portion including a plurality of first outer portion fins and a plurality of first outer portion holes;

a central portion including a plurality of central portion fins and a plurality of central portion holes;

a second outer portion including a plurality of second outer portion fins and a plurality of second outer portion holes;

a first divider portion extending between the first outer portion and the central portion; and

a second divider portion extending between the central portion and the second outer portion.

2) The baffle of 1), wherein the first partition portion and the second partition portion are arranged in a V-shape.

3) The baffle of 1), wherein:

each of the first plurality of outer section fins is separated from another of the first plurality of outer section fins by one of the first plurality of outer section holes;

each of the plurality of central portion fins is separated from another of the plurality of central portion fins by one of the plurality of central portion holes; and

each of the plurality of second outer side fins is separated from another of the plurality of second outer side fins by one of the plurality of second outer side holes.

4) The baffle of any of 1) -3), wherein:

the number of the first outer side portion fins is equal to the number of the first outer side portion holes;

the number of the plurality of center portion fins is equal to the number of the plurality of center portion holes; and

the number of the second plurality of outside portion fins is equal to the number of the second plurality of outside portion holes.

5) The baffle of any of claims 1) -3), wherein the baffle flange comprises:

a first baffle flange curved portion extending along the first outer side portion; and

a second baffle flange curved portion extending along the second outer portion.

6) The baffle of 5), wherein the baffle flange further comprises:

a first baffle plate flange connection portion abutting the first baffle plate flange curved portion and the second baffle plate flange curved portion;

a first baffle flange corner portion adjoining the first baffle flange curved portion;

a second shutter flange corner portion that abuts the second shutter flange curved portion; and

a second baffle flange connection portion that abuts the first baffle flange corner portion and the second baffle flange corner portion, the second baffle flange connection portion being separated from the first baffle flange curved portion by the first baffle flange corner portion and separated from the second baffle flange curved portion by the second baffle flange corner portion.

7) The baffle of 6), wherein the perforated plate further comprises:

a perforated plate edge contiguous with the first baffle flange connection portion, the second baffle flange connection portion, the first outboard portion, the first divider portion, the central portion, the second divider portion, and the second outboard portion;

a first perforated plate connector extending between the perforated plate edge and the second baffle flange connection portion; and

a second perforated plate connector extending between the perforated plate edge and the second baffle flange connection portion.

8) The baffle of 6) or 7), wherein the perforated plate further comprises:

a first perforated plate corner portion adjoining the first baffle flange curved portion, the first outer portion, and the first partition portion; and

a second perforated plate corner portion abutting the second baffle flange curved portion, the second outer portion, and the second partition portion.

9) A baffle for a reductant delivery system, the baffle comprising:

a baffle flange, comprising:

a first baffle flange curved portion;

a second shutter flange bent portion;

a first baffle plate flange connection portion that is arranged along a straight line and that is adjacent to the first baffle plate flange curved portion and the second baffle plate flange curved portion;

a second baffle flange connection portion that is arranged along a straight line parallel to the first baffle flange connection portion and is abutted with the first baffle flange corner portion and the second baffle flange corner portion, the second baffle flange connection portion being separated from the first baffle flange curved portion by the first baffle flange corner portion and being separated from the second baffle flange curved portion by the second baffle flange corner portion; and

a perforated plate at least partially defined by the baffle flange, the perforated plate comprising a central portion comprising a plurality of central portion fins and a plurality of central portion holes.

10) The baffle of 9), wherein the perforated plate further comprises:

a perforated plate edge contiguous with the first baffle flange connection section, the second baffle flange connection section, and the central section;

11) The baffle of 9), wherein each of the plurality of central portion fins is separated from another of the plurality of central portion fins by one of the plurality of central portion holes.

12) The baffle of any of claims 9) -11), wherein a first number of the plurality of central portion fins is equal to a second number of the plurality of central portion holes.

13) The baffle of any of claims 9) -11), wherein the plurality of central portion apertures are arranged within a trapezoid defined in part by the first baffle flange connection portion.

14) The baffle of 13), wherein the perforated plate further comprises:

a first outer portion including a plurality of first outer portion fins and a plurality of first outer portion holes; and

a second outer portion including a plurality of second outer portion fins and a plurality of second outer portion holes.

15) The baffle of claim 14), wherein:

a sum of cross-sectional areas of each of the plurality of center portion apertures is greater than a sum of cross-sectional areas of each of the plurality of first outer portion apertures; and

the sum of the cross-sectional areas of each of the plurality of center portion holes is greater than the sum of the cross-sectional areas of each of the plurality of second outside portion holes.

Drawings

The details of one or more implementations are set forth in the accompanying drawings and the description below. Other features, aspects, and advantages of the disclosure will become apparent from the description, the drawings, and the claims, wherein:

FIG. 1 is a block schematic diagram of an example exhaust aftertreatment system;

FIG. 2 is a perspective view of an example reductant delivery system for the exhaust aftertreatment system shown in FIG. 1;

FIG. 3 is a perspective view of a baffle for the reductant delivery system shown in FIG. 2;

FIG. 4 is a front view of the baffle shown in FIG. 3;

FIG. 5 is a rear view of the baffle shown in FIG. 3;

FIG. 6 is a left side view of the baffle shown in FIG. 3;

FIG. 7 is a right side view of the baffle shown in FIG. 3;

FIG. 8 is a top view of the baffle shown in FIG. 3;

FIG. 9 is a bottom view of the baffle shown in FIG. 3;

FIG. 10 is a cross-sectional view of the baffle of FIG. 4 taken along plane A-A; and

fig. 11 is a view of detail a shown in fig. 10.

It will be appreciated that some or all of the figures are schematic representations for purposes of illustration. The drawings are provided to illustrate one or more embodiments and are to be clearly understood as not limiting the scope or meaning of the claims.

Detailed Description

The following follows a more detailed description of embodiments relating to various concepts of and methods, apparatuses for treating exhaust gases of internal combustion engines. The various concepts introduced above and discussed in greater detail below may be implemented in any of numerous ways, as the described concepts are not limited to any particular implementation. Examples of specific embodiments and applications are provided primarily for illustrative purposes.

I. Overview

Providing a reductant to exhaust gas to reduce NO in an exhaust aftertreatment system_xAnd (4) discharging. When the exhaust gas and the reductant are undesirably mixed, deposits (e.g., accumulations, solids, etc.) of the reductant may form along surfaces (e.g., interior surfaces, etc.) within the exhaust aftertreatment system. The deposits restrict the flow of exhaust gas through the exhaust aftertreatment system and cause an increase in backpressure, which may cause the exhaust aftertreatment system to become less than ideal. For example, an increase in backpressure may reduce the performance and/or efficiency of an internal combustion engine associated with the exhaust aftertreatment system.

It may be desirable to flow the exhaust gas in such a manner that: deposits are less likely to form on certain surfaces within the exhaust aftertreatment system. For example, when the exhaust gas is rapidly redirected (e.g., by flowing through a U-shaped deposition chamber), it may be desirable to ensure that backflow of the exhaust gas out of the decomposition chamber (e.g., flow in an upstream direction, etc.) is minimized because deposits may form on components (e.g., particulate filters) upstream of the decomposition chamber of the exhaust aftertreatment system.

Embodiments described herein relate to a baffle for a reductant delivery system that is configured to prevent backflow of exhaust gas and reductant to upstream components, thereby mitigating formation of deposits on these upstream components, and mitigating formation of deposits on the baffle itself.

The baffle includes a baffle flange that facilitates coupling the baffle to an enclosure of the reductant delivery system and cooperates with the enclosure to define various openings for exhaust gas to flow around the baffle.

In addition, the baffle includes a perforated plate having two partitions that divide the perforated plate into a first outer portion having a plurality of openings and a plurality of fins, a central portion having a plurality of openings and a plurality of fins, and a second outer portion having a plurality of openings and a plurality of fins. The plurality of fins are angled such that the reductant drips from the plurality of fins due to gravity and such that backflow of exhaust gas upstream of the baffle is mitigated. Furthermore, the partition portion is arranged in a V-shape, which provides structural rigidity to the baffle plate, thereby increasing desirability of the reductant delivery system due to enhanced robustness.

Example exhaust aftertreatment System

FIG. 1 depicts an exhaust aftertreatment system 100 having an example reductant delivery system 102 for an exhaust gas conduit system 104. The exhaust aftertreatment system 100 also includes a particulate filter (e.g., a Diesel Particulate Filter (DPF))106 and a Selective Catalytic Reduction (SCR) catalyst member 108.

The particulate filter 106 is configured to remove particulate matter (e.g., soot) from the exhaust gas flowing in the exhaust gas conduit system 104. The particulate filter 106 includes an inlet at which the exhaust gas is received and an outlet at which the exhaust gas exits after the particulate matter has substantially been filtered from the exhaust gas and/or converted to carbon dioxide. In some embodiments, the particulate filter 106 may be omitted.

The reductant delivery system 102 includes a decomposition chamber 110 (e.g., a decomposition reactor, a tubular reactor, a decomposition tube, a reactor tube, etc.). Decomposition chamber 110 is configured to convert the reductant to ammonia. The reductant may be, for example, urea, Diesel Exhaust Fluid (DEF),

Aqueous urea solutions (UWS), aqueous urea solutions (e.g., AUS32, etc.), and other similar fluids. Decomposition chamber 110 comprises an inlet fluidly coupled to particulate filter 106 (e.g., configured to be in fluid communication with particulate filter 106, etc.) to receive a gas containing NO and an outlet_xExhaust gas of the emissions, the outlet being for the exhaust gas, NO_xThe emissions, ammonia, and/or reductants flow to the SCR catalyst member 108.

Reductant delivery system 102 also includes a dosing module 112 (e.g., doser, etc.) that dosing module 112 is configured to dose reductant into decomposition chamber 110. The dosing module 112 may include a spacer disposed between a portion of the dosing module 112 and a portion of the decomposition chamber 110 in which the dosing module 112 is installed.

The dosing module 112 is fluidly coupled to a reductant source 114. The reductant source 114 may include a plurality of reductant sources 114. The reductant source 114 may be, for example, a source containing

The diesel engine exhaust gas treatment liquid tank of (1). A reductant pump 116 (e.g., a supply unit, etc.) is used to pressurize reductant from the reductant source 114 for delivery to the dosing module 112. In some embodiments, reductant pump 116 is pressure controlled (e.g., controlled to achieve a target pressure, etc.). The reductant pump 116 includes a reductant filter 118. The reductant filter 118 filters (e.g., strainers, etc.) the reductant before it is provided to internal components (e.g., pistons, vanes, etc.) of the reductant pump 116. For example, the reductant filter 118 may inhibit or prevent the transport of solids (e.g., solidified reductant, contaminants, etc.) to internal components of the reductant pump 116. In this manner, the reductant filter 118 may facilitate long-term desired operation of the reductant pump 116. In some embodiments, the reductant pump 116 is coupled to (e.g., attached to, secured to, welded to, integrated into, etc.) a vehicle chassis associated with the exhaust aftertreatment system 100.

The dosing module 112 includes at least one injector 120. Each injector 120 is configured to dose a reductant into the exhaust gas (e.g., within decomposition chamber 110, etc.). In some embodiments, reductant delivery system 102 also includes an air pump 122. In these embodiments, the air pump 122 draws air from an air source 124 (e.g., air inlet, etc.) and through an air filter 126 disposed upstream of the air pump 122. In addition, the air pump 122 provides air to the dosing module 112 via a conduit. In these embodiments, the dosing module 112 is configured to mix air and reductant into an air-reductant mixture and provide the air-reductant mixture into the decomposition chamber 110. In other embodiments, the reductant delivery system 102 does not include the air pump 122 or the air source 124. In such embodiments, the dosing module 112 is not configured to mix the reductant with air.

The dosing module 112 and the reductant pump 116 are also electrically or communicatively coupled to a reductant delivery system controller 128. Reductant delivery system controller 128 is configured to control dosing module 112 to dose reductant into decomposition chamber 110. The reductant delivery system controller 128 may also be configured to control the reductant pump 116.

The reductant delivery system controller 128 includes a processing circuit 130. Processing circuitry 130 includes a processor 132 and a memory 134. The processor 132 may include a microprocessor, an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), the like, or combinations thereof. The memory 134 may include, but is not limited to, an electronic, optical, magnetic, or any other storage or transmission device capable of providing program instructions to a processor, ASIC, FPGA, or the like. The memory 134 may include a memory chip, an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), flash memory, or any other suitable memory from which the reductant delivery system controller 128 may read instructions. The instructions may include code from any suitable programming language. Memory 134 may include various modules including instructions configured to be implemented by processor 132.

In various embodiments, the reductant delivery system controller 128 is configured to communicate with a central controller 136 (e.g., an Engine Control Unit (ECU), an Engine Control Module (ECM), etc.) of an internal combustion engine having the exhaust aftertreatment system 100. In some embodiments, the central controller 136 and the reductant delivery system controller 128 are integrated into a single controller.

In some embodiments, the central controller 136 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 state in response to receiving information from the central controller 136. For example, the display device may be configured to change between static (e.g., display a green light, display a "SYSTEM OK" message, etc.) and alarm states (e.g., display a flashing red light, display a "repair needed (SERVICE NEEDED)" message, etc.) based on communications from the central controller 136. By changing the state, the display device may provide an indication to a user (e.g., an operator, etc.) of the state of the reductant delivery system 102 (e.g., in operation, in need of maintenance, etc.).

Decomposition chamber 110 is located upstream of SCR catalyst member 108. As a result, the reductant is injected by the injector 120 upstream of the SCR catalyst component 108 such that the SCR catalyst component 108 receives a mixture of the reductant and the exhaust gas. The reductant droplets undergo evaporation, pyrolysis, and hydrolysis processes in decomposition chamber 110, SCR catalyst member 108, and/or exhaust gas conduit system 104 to form non-NO_xEmissions (e.g., gaseous ammonia, etc.).

The SCR catalyst member 108 is configured to accelerate NO of the reductant and exhaust gas_xNO between_xReduction into diatomic nitrogen, water and/or carbon dioxide to help reduce NO_xAnd (4) discharging. SCR catalyst component 108 includes an inlet fluidly coupled to decomposition chamber 110 and an outlet fluidly coupled to an end of exhaust gas conduit system 104 from which the exhaust gas and reductant are received.

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

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

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

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

In some embodiments, particulate filter 106 may be positioned downstream of decomposition chamber 110. For example, the particulate filter 106 and the SCR catalyst component 108 may be combined into a single unit. In some embodiments, the dosing module 112 may alternatively be positioned downstream of a turbocharger (turboharger) or upstream of a turbocharger.

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 (e.g., gasoline, hybrid, propane, and other similar internal combustion engines).

Example reductant delivery System

FIG. 2 illustrates a reductant delivery system 200, according to an example embodiment. In various embodiments, reductant delivery system 200 is reductant delivery system 102. The reductant delivery system 200 includes a reductant delivery system body 202 (e.g., a housing, frame, assembly, etc.). The reductant delivery system body 202 includes an inlet body 204 (e.g., a shell, a frame, an assembly, etc.). The inlet body 204 includes an inlet body inlet 206 (e.g., an opening, a bore, etc.). The inlet body inlet 206 is configured to receive exhaust gas from the exhaust gas conduit system 104. In some embodiments, the reductant delivery system 200 is located downstream of the particulate filter 106 such that the inlet body inlet 206 receives exhaust gas from the particulate filter 106.

The inlet body 204 includes an inlet body coupler 208 (e.g., body, etc.). The inlet body coupler 208 defines (e.g., circumscribes, etc.) an inlet body inlet 206. The inlet body coupler 208 is coupled (e.g., attached to, secured to, welded to, integrated into, etc.) the exhaust gas conduit system 104 about (e.g., around, etc. the inlet body inlet 206. In various embodiments, the inlet body coupler 208 is circular.

The inlet body 204 also includes an inlet body housing 210 (e.g., body, frame, etc.). The inlet body housing 210 includes an inlet body housing coupling surface 212 (e.g., face, etc.). In various embodiments, the inlet body housing coupling surface 212 is arranged along an arc of a circle. The inlet body housing coupling surface 212 is in contact with an inlet body coupler coupling surface (e.g., face, etc.) of the inlet body coupler 208. In various embodiments, the inlet body housing coupling surface 212 is coupled to an inlet body coupler coupling surface of the inlet body coupler 208.

The reductant delivery system body 202 also includes a transport shell 214 (e.g., shell, frame, assembly, etc.). The transport shell 214 includes a transport shell inlet coupling surface 216 (e.g., face, etc.). The transport shell inlet coupling surface 216 is coupled to an inlet body coupler coupling surface of the inlet body coupler 208. The transport shell 214 also includes a transport shell mounting surface 218 (e.g., face, etc.). The transport shell mounting surface 218 is coupled to an inlet body housing mounting surface 220 (e.g., face, etc.) of the inlet body housing 210. The inlet body housing 210 and the transfer housing 214 are configured to contain the exhaust gas received by the inlet body inlet 206.

The inlet body 204 also includes an inlet body inner shell 222 (e.g., body, frame, etc.). The inlet body inner housing 222 extends from within the inlet body outer housing 210 to within the transfer housing 214 and is contained within the inlet body outer housing 210 and the transfer housing 214. The inlet body inner housing 222 is configured such that exhaust gas may flow within the inlet body inner housing 222 (e.g., between the inlet body inner housing 222 and the transfer housing 214, etc.) and around the inlet body inner housing 222 (e.g., between the inlet body inner housing 222 and the inlet body outer housing 210, between the inlet body inner housing 222 and the transfer housing 214, etc.).

The inlet body 204 also includes a dosing mount 223 (e.g., dosing module mount, dosing mount 223, etc.). A dosing mount 223 is coupled to the inlet body housing 210 and is configured to couple to the dosing module 112 and/or the injector 120. The dosing mount 223 is configured to facilitate passage of reductant through the inlet body outer shell 210 (e.g., into the inlet body outer shell 210, into the inlet body inner shell 222, into the transfer shell 214, etc.). In some embodiments, the dosing mount 223 extends through the inlet body outer shell 210 and the inlet body inner shell 222 (e.g., such that reductant is provided to the inlet body inner shell 222, etc.). In other embodiments, the dosing mount 223 extends only through the inlet body outer housing 210 and not through the inlet body inner housing 222 (e.g., such that reductant is provided into the inlet body outer housing 210, not the inlet body inner housing 222, etc.). In other embodiments, the dosing mount 223 extends into the transfer housing 214 (e.g., such that reductant is provided into the transfer housing 214, etc.).

After the reducing agent has been provided through the dosing mount 223, the reducing agent is mixed with the exhaust gas. For example, the inlet body outer shell 210, the inlet body inner shell 222, and/or the transport shell 214 may include internal features (e.g., vanes, and mixers) configured to promote swirling of the exhaust gas, which results in mixing of the exhaust gas and the reductant.

The inlet body 204 also includes a baffle 224 (e.g., a baffle plate, etc.). The baffle 224 is shown in detail in fig. 3-10. A baffle 224 is located near the inlet body inlet 206. As explained in greater detail herein, baffle 224 is configured to mitigate backflow of exhaust gas and reductant upstream of inlet body inlet 206 (e.g., back toward particulate filter 106, etc.), while mitigating formation of deposits on baffle 224, and is structurally robust so as to maintain functionality throughout loading (e.g., mechanical loading, thermal loading, etc.) of reductant delivery system 200. Further, by mitigating backflow of the exhaust gas, the baffle 224 is configured to mitigate formation of deposits on components of the exhaust aftertreatment system (e.g., particulate filters) upstream of the baffle 224.

As exhaust gas flows through the inlet body inlet 206 (e.g., in a downstream direction), a portion of the exhaust gas flows through the baffle 224 and a portion of the exhaust gas flows around the baffle 224 without flowing through the baffle 224. For example, some of the exhaust gas flowing through the inlet body inlet 206 may flow between the inlet body housing 210 and the baffle 224 (e.g., above the baffle 224, etc.), and some of the exhaust gas flowing through the inlet body inlet 206 may flow between the transfer case 214 and the baffle 224 (e.g., below the baffle 224, etc.).

The baffle 224 includes a baffle flange 226 (e.g., a coupling surface, a rib (rib), etc.). Various portions of baffle flange 226 are coupled to at least one of inlet body coupler 208, inlet body outer shell 210, transfer shell 214, or inlet body inner shell 222 such that baffle 224 is secured within inlet body outer shell 210 and transfer shell 214 proximate inlet body inlet 206. For example, the baffle 224 may be secured within the inlet body inner shell 222.

The baffle flange 226 includes a first baffle flange curved portion 228. First baffle flange bend 228 is disposed proximate inlet body inlet 206 along a curve that approximately matches a curve along which inlet body housing 210 and transfer case 214 are disposed. For example, first baffle flange curved portion 228 may be disposed along an arc having a radius approximately equal to a radius of inlet body inlet 206 (e.g., within 5% of the radius of inlet body inlet 206, etc.). In various embodiments, the first baffle flange bend portion 228 is coupled to at least one of the inlet body housing 210 or the transfer case 214.

The baffle flange 226 includes a second baffle flange curved portion 230. Second baffle flange curved portion 230 is disposed proximate inlet body inlet 206 along a curve that approximately matches the curve along which inlet body housing 210 and transfer case 214 are disposed. For example, second baffle flange curved portion 230 may be disposed along an arc having a radius approximately equal to the radius of inlet body inlet 206 (e.g., within 5% of the radius of inlet body inlet 206, etc.). In various embodiments, the second baffle flange bend portion 230 is coupled to at least one of the inlet body casing 210 or the transfer case 214. In various embodiments, the second baffle flange curved portion 230 is identical to the first baffle flange curved portion 228. For example, the first baffle flange curved portion 228 may be disposed along an arc of a circle having a first radius, and the second baffle flange curved portion 230 may be disposed along an arc of a circle also having a first radius.

The baffle flange 226 includes a first baffle flange connection portion 232. The first baffle flange connection portion 232 abuts the first baffle flange curved portion 228 and the second baffle flange curved portion 230. In some embodiments, the first baffle flange connection portion 232 is arranged along a straight line.

The baffle flange 226 also includes a second baffle flange attachment portion 234. The second baffle flange connection portion 234 is positioned opposite the first baffle flange connection portion 232. In some embodiments, the second baffle flange connection portion 234 is arranged along a straight line. In various embodiments, the first baffle flange connection portion 232 is disposed along a first line and the second baffle flange connection portion 234 is disposed along a second line parallel to the first line.

The baffle flange 226 also includes a first baffle flange corner portion 236. The first baffle flange corner portion 236 abuts the first baffle flange curved portion 228 and the second baffle flange connecting portion 234. In some embodiments, the first baffle flange corner portions 236 are arranged along a curved arc. In other embodiments, the first baffle flange corner portions 236 are arranged along a plurality of lines that are angled with respect to each other. The first baffle flange corner portion 236 forms a corner opening (e.g., a hole, a window, etc.) with the inlet body housing 210. Exhaust gas may flow around the baffle 224 via the corner openings.

The baffle flange 226 also includes a second baffle flange corner portion 238. The second shutter flange corner portion 238 abuts the second shutter flange curved portion 230 and the second shutter flange connection portion 234. In some embodiments, the second baffle flange corner portions 238 are arranged along a curved arc. In other embodiments, the second baffle flange corner portions 238 are arranged along a plurality of lines that are angled with respect to each other. In various embodiments, the second baffle flange corner portion 238 is identical to the first baffle flange corner portion 236. The second baffle flange corner portion 238 forms a corner opening (e.g., a hole, a window, etc.) with the inlet body housing 210. Exhaust gas may flow around the baffle 224 via the corner openings.

The baffle 224 also includes a perforated plate 240. As explained in more detail herein, the perforated plate 240 facilitates the flow of exhaust gas through the baffle 224 rather than around the baffle 224. By flowing through the baffle 224, the exhaust gas is desirably directed into the inlet body housing 210 and the transfer housing 214. The perforated plate 240 may be configured in various ways to desirably direct gas into the inlet body outer shell 210, the transfer shell 214, and/or the inlet body inner shell 222. In addition, perforated plate 240 is configured to mitigate backflow of exhaust gas from inlet body 204 (e.g., toward upstream components of the exhaust aftertreatment system, etc.), mitigate formation of deposits on perforated plate 240, and is structurally robust so as to remain functional throughout the load of reductant delivery system 200.

Perforated plate 240 includes a perforated plate edge 242. Perforated plate edge 242 abuts first baffle flange bend 228 and second baffle flange bend 230. The perforated plate edge 242 is spaced apart from the second baffle flange connection portion 234, the first baffle flange corner portion 236, and the second baffle flange corner portion 238. In some embodiments, perforated plate edge 242 is parallel to second baffle flange connection portion 234.

The perforated plate 240 also includes a first perforated plate connector 244 and a second perforated plate connector 246. The first and second

perforated plate connectors

244 and 246 each extend from the perforated plate edge 242 to the second baffle flange connection portion 234. Thus, the first and

second bulkhead connectors

244, 246 separate the bulkhead edge from the second baffle flange connection portion 234. In some embodiments, the first bulkhead connector 244 is disposed along a line orthogonal to a line along which the second baffle flange connection portion 234 is disposed and/or a line along which the perforated panel edge 242 is disposed. In some embodiments, the second bulkhead connector 246 is disposed along a line orthogonal to a line along which the second baffle flange connection portion 234 is disposed and/or a line along which the perforated panel edge 242 is disposed. In some embodiments, the first bulkhead connectors 244 are arranged along a line parallel to a line along which the second bulkhead connectors 246 are arranged.

The baffle 224 also includes a first baffle aperture 248. A first baffle hole 248 is defined between the first baffle flange curved portion 228, the first baffle flange corner portion 236, the second baffle flange connection portion 234, and the first perforated plate connector 244. The first baffle apertures 248 facilitate the flow of exhaust gas through the baffle 224.

The baffle 224 also includes a second baffle aperture 250. The second baffle aperture 250 is defined between the first bulkhead connector 244, the second baffle flange connection portion 234, and the second bulkhead connector 246. The first baffle aperture 248 is separated from the second baffle aperture 250 by the first bulkhead connector 244. The second baffle apertures 250 facilitate the flow of exhaust gas through the baffle 224. In various embodiments, the cross-sectional area of the second baffle apertures 250 is less than the cross-sectional area of the first baffle apertures 248. For example, the cross-sectional area of the second baffle holes 250 may be approximately equal to 0.2 Δ to 0.5 Δ, including 0.2 Δ and 0.5 Δ, where Δ is the cross-sectional area of the first baffle holes 248.

The baffle 224 also includes a third baffle aperture 252. The third baffle hole 252 is defined between the second baffle flange curved portion 230, the second baffle flange corner portion 238, the second baffle flange connection portion 234, and the second perforated plate connector 246. The second baffle aperture 250 is separated from the third baffle aperture 252 by the second bulkhead connector 246. The third baffle apertures 252 facilitate the flow of exhaust gas through the baffle 224. In various embodiments, the cross-sectional area of the third baffle holes 252 is greater than the cross-sectional area of the second baffle holes 250. For example, the cross-sectional area of the third baffle holes 252 may be approximately equal to 2 σ to 5 σ, inclusive of 2 σ and 5 σ, where σ is the cross-sectional area of the second baffle holes 250. In some embodiments, the cross-sectional area of the third baffle holes 252 is approximately equal to the cross-sectional area of the first baffle holes 248.

The perforated plate 240 also includes a first perforated plate corner portion 254. The first perforated plate corner portion 254 extends toward the first baffle flange curved portion 228 and toward the first baffle flange connection portion 232. As a result, the first perforated plate corner portion 254 separates a portion of the perforated plate 240 from the first baffle flange curved portion 228 and the first baffle flange connection portion 232.

The perforated plate 240 also includes a second perforated plate corner portion 256. The second perforated plate corner portion 256 extends toward the second baffle flange curved portion 230 and toward the first baffle flange connection portion 232. As a result, the second perforated plate corner portion 256 separates a portion of the perforated plate 240 from the second baffle flange curved portion 230 and the first baffle flange connection portion 232.

The baffle 224 also includes a first baffle corner aperture (bag corner aperture) 258. A first baffle angular aperture 258 is defined between the first baffle flange bend 228, the first baffle flange connection 232 and the first perforated plate corner 254. The first baffle angle holes 258 facilitate the flow of exhaust gas through the baffle 224. In various embodiments, the cross-sectional area of the first baffle angle holes 258 is less than the cross-sectional area of the second baffle holes 250. For example, the cross-sectional area of first baffle angular aperture 258 may be approximately equal to 0.4 σ to 0.8 σ, inclusive of 0.4 σ and 0.8 σ, where σ is the cross-sectional area of second baffle aperture 250.

The baffle 224 also includes a second baffle angle aperture 260. A second baffle corner hole 260 is defined between the second baffle flange curved portion 230, the first baffle flange connection portion 232, and the second perforated plate corner portion 256. The second baffle corner holes 260 facilitate the flow of exhaust gas through the baffle 224. In various embodiments, the cross-sectional area of the second baffle corner holes 260 is less than the cross-sectional area of the second baffle holes 250. For example, the cross-sectional area of the second baffle angular aperture 260 may be approximately equal to 0.4 σ to 0.8 σ, inclusive of 0.4 σ and 0.8 σ, where σ is the cross-sectional area of the second baffle aperture 250. In some embodiments, the cross-sectional area of second baffle corner holes 260 is approximately equal to the cross-sectional area of first baffle corner holes 258.

The perforated plate 240 also includes a first divider portion 262. the first divider portion 262 abuts and extends between the first perforated plate corner portion 254 and the first perforated plate connector 244. the first divider portion 262 is disposed along a straight line and is offset from the baffle plane 264 by a first divider angle α₁The baffle plane 264 is perpendicular to the line along which the first baffle flange connection 232 is disposed, the line along which the second baffle flange connection 234 is disposed, and/or the line along which the perforated plate edge 242 is disposed α in various applications₁Approximately equal to an angle between 20 ° and 40 °, inclusive of 20 ° and 40 ° (e.g., 18 °, 20 °, 22 °, 25 °, 30 °, 35 °, 38 °, 40 °, 42 °, etc.).

Perforated plate 240 also includes second divider portions 266, second divider portions 266 abut and extend between second perforated plate corner portions 256 and second perforated plate connector 246, second divider portions 266 are arranged in a straight line and are offset from baffle plane 264 by second divider angle α₂In various applications, α₂Approximately equal to an angle between 20 ° and 40 °, inclusive of 20 ° and 40 ° (e.g., 18 °, 20 °, 22 °, 25 °, 30 °, 35 °, 38 °, 40 °, 42 °, etc.)₂Approximately equal to α₁。

The perforated plate 240 also includes a first outer portion 268. The first outer portion 268 is bounded by a first baffle flange bend 228 (e.g., the first baffle flange bend 228 extends along the first outer portion 268, etc.), a perforated plate edge 242 (e.g., the perforated plate edge 242 extends along the first outer portion 268, etc.), a perforated plate corner portion 254 (e.g., the perforated plate corner portion 254 extends along the first outer portion 268, etc.), and a first divider portion 262 (e.g., the first divider portion 262 extends along the first outer portion 268, etc.). The first outer portion 268 is generally trapezoidal in shape. The first outer section 268 includes a plurality of first outer section fins 270 and a plurality of first outer section holes 272. Each of the first outboard fins 270 is contiguous with and extends above one of the first outboard holes 272. The number of first outboard fins 270 is equal to the number of first outboard holes 272. Further, each of the plurality of first outer side fins 270 is separated from another of the plurality of first outer side fins 270 by one of the plurality of first outer side holes 272.

As the exhaust gas flows toward the first outer portion 268, the exhaust gas is directed along the first outer portion fins 270 into the first outer portion apertures 272 and through the first outer portion 268. As the exhaust gas flows along the first outer portion fins 270, the exhaust gas may be according to the fin angle β of each of the first outer portion fins 270₁Is guided β₁Measured with respect to baffle plane 264 select β for each of first outside section fins 270₁Such that the exhaust gases are desirably directed by the first outboard side fins 270 into the inlet body outer casing 210, the transfer casing 214, and/or the inlet body inner casing 222. Specifically, the first outer section fins 270 mitigate backflow of exhaust gas from the inlet body 204 (e.g., toward a particulate filter, etc.), while the first outer section fins are also angled to facilitate the flow of reductant by gravity down the first outer section fins 270 to mitigate the formation of deposits on the first outer section fins 270.

Each of the first outer portion apertures 272 is defined by a length measured along a line along which the first baffle flange connection 232 is disposed, along which the second baffle flange connection 234 is disposed, and/or along which the perforated plate edge 242 is disposed. The length of the first outside portion hole 272 increases from the minimum length of the first outside portion hole 272 located near the first perforated plate corner portion 254 to the maximum length of the first outside portion hole 272 located near the perforated plate edge 242. This arrangement and configuration of the first outer portion apertures 272 helps to mitigate backflow of exhaust gases through the baffle 224 and mitigates the formation of deposits on the baffle 224.

Each of the first outside section fins 270 is defined by a length measured along a line along which the first baffle flange connection 232 is disposed, along which the second baffle flange connection 234 is disposed, and/or along which the perforated plate edge 242 is disposed. The length of the first outer section fin 270 is less than the length of the first outer section hole 272 adjacent to the first outer section fin 270. The length of the first outside portion fin 270 increases from the minimum length of the first outside portion fin 270 located near the first perforated plate corner portion 254 to the maximum length of the first outside portion fin 270 located near the perforated plate edge 242. This arrangement and configuration of the first outboard section fins 270 helps to mitigate backflow of exhaust gases past the baffle 224 and mitigates the formation of deposits on the baffle 224.

The perforated plate 240 also includes a central portion 274. Central portion 274 is bounded by perforated plate edge 242 (e.g., perforated plate edge 242 extends along central portion 274, etc.), first divider portion 262 (e.g., first divider portion 262 extends along central portion 274, etc.), and second divider portion 266 (e.g., second divider portion 266 extends along central portion 274, etc.). The central portion 274 is generally trapezoidal in shape. The central portion 274 includes a plurality of central portion fins 276 and a plurality of central portion holes 278. Each of the center section fins 276 abuts one of the center section holes 278 and extends thereabove. In various embodiments, the first baffle flange connection portion 232 includes a central portion fin 276. In these embodiments, the number of center portion fins 276 is equal to the sum of the number of center portion holes 278 and one. In other embodiments, the first baffle flange connection portion 232 does not include the central portion fin 276. In these embodiments, the number of center portion fins 276 is equal to the number of center portion holes 278. Additionally, each of the plurality of center section fins 276 is separated from another of the plurality of center section fins 276 by one of the plurality of center section holes 278.

As the exhaust gas flows toward the central portion 274, the exhaust gas is directed along the central portion fins 276 into the central portion holes 278 and through the central portion 274. As the exhaust flows along the center portion fins 276, the exhaust may follow the center portion fins276 fin angle β of each of₂Is guided β₂Measured with respect to the baffle plane 264. β for each of the central portion fins 276 is selected₂Such that the exhaust gases are desirably channeled into inlet body outer shell 210, transfer shell 214, and/or inlet body inner shell 222 by center portion fins 276. specifically, center portion fins 276 mitigate backflow of exhaust gases from inlet body 204 (e.g., toward a particulate filter, etc.) while center portion fins are also angled to facilitate the flow of reductant by gravity down center portion fins 276 to mitigate the formation of deposits on center portion fins 276. in various embodiments, β₂Approximately equal to β₁。

Each of the central portion apertures 278 is defined by a length measured along a line along which the first baffle flange connection 232 is disposed, along which the second baffle flange connection 234 is disposed, and/or along which the perforated plate edge 242 is disposed. The length of the center portion aperture 278 decreases from a maximum length of the center portion aperture 278 located near the first baffle flange connection portion 232 to a minimum length of the center portion aperture 278 located near the perforated plate edge 242. This arrangement and configuration of the center portion aperture 278 helps to mitigate backflow of exhaust gases through the baffle 224 and mitigates the formation of deposits on the baffle 224.

Each of the center portion fins 276 is defined by a length measured along a line along which the first baffle flange connection portion 232 is arranged, a line along which the second baffle flange connection portion 234 is arranged, and/or a line along which the perforated plate edge 242 is arranged. The length of the center portion fin 276 is less than the length of the center portion hole 278 adjacent to the center portion fin 276. The length of the center portion fins 276 is reduced from the maximum length of the center portion fins 276 located near the first baffle flange connection 232 to the minimum length of the center portion fins 276 located near the perforated plate edge 242. This arrangement and configuration of the center section fins 276 helps to mitigate backflow of exhaust gases through the baffle 224 and mitigates the formation of deposits on the baffle 224.

In various embodiments, the number of center portion fins 276 is greater than the number of first outer portion fins 270, and the number of center portion holes 278 is greater than the number of first outer portion holes 272. In some embodiments, a first spacing between at least one adjacent pair of the central portion apertures 278 is equal to a second spacing between at least one adjacent pair of the first outer portion apertures 272. In various embodiments, the sum of the cross-sectional areas of the central portion apertures 278 is greater than the sum of the cross-sectional areas of the first outer portion apertures 272. For example, the sum of the cross-sectional areas of the central portion apertures 278 may be approximately equal to 2 γ to 4.5 γ, inclusive, where γ is the sum of the cross-sectional areas of the first outer portion apertures 272.

The perforated plate 240 also includes a second outer portion 280. The second outer portion 280 is bounded by the second baffle flange curved portion 230 (e.g., the second baffle flange curved portion 230 extends along the second outer portion 280, etc.), the perforated plate edge 242 (e.g., the perforated plate edge 242 extends along the second outer portion 280, etc.), the second perforated plate corner portion 256 (e.g., the second perforated plate corner portion 256 extends along the second outer portion 280, etc.), and the second divider portion 266 (e.g., the second divider portion 266 extends along the second outer portion 280, etc.). The second outer portion 280 is generally trapezoidal in shape. The second outer portion 280 includes a plurality of second outer portion fins 282 and a plurality of second outer portion holes 284. Each of the second outboard portion fins 282 abuts one of the second outboard portion holes 284 and extends thereabove. The number of second outboard portion fins 282 is equal to the number of second outboard portion holes 284. In addition, each of the plurality of second outside portion fins 282 is separated from another of the plurality of second outside portion fins 282 by one of the plurality of second outside portion holes 284.

As the exhaust flows toward the second outer portion 280, the exhaust is directed into the second outer portion holes 284 along the second outer portion fins 282 and through the second outer portion 280, the exhaust may be according to the third angle β of each of the second outer portion fins 282 as the exhaust flows along the second outer portion fins 282₃Is guided β₃Measured relative to the baffle plane 264. β for each of the second outboard portion fins 282 is selected₃Specifically, the second outer side fins 282 mitigate backflow of exhaust gas from the inlet body 204 (e.g., toward a particulate filter, etc.) while the second outer side fins are also angled to facilitate the flow of reductant due to gravity down the second outer side fins 282 to mitigate the formation of deposits on the second outer side fins 282. in various embodiments, β₃Approximately equal to β₁In some embodiments, β₃Approximately equal to β₂And is approximately equal to β₁。

Each of the second outer portion apertures 284 is defined by a length measured along a line along which the first baffle flange connection 232 is disposed, along which the second baffle flange connection 234 is disposed, and/or along which the perforated plate edge 242 is disposed. The length of the second outer portion holes 284 increases from a minimum length of the second outer portion holes 284 located near the second perforated plate corner portion 256 to a maximum length of the second outer portion holes 284 located near the perforated plate edge 242. This arrangement and configuration of the second outer portion apertures 284 helps to mitigate backflow of exhaust gases through the baffle 224 and mitigates the formation of deposits on the baffle 224.

Each of the second outside portion fins 282 is defined by a length measured along a line along which the first baffle flange connection 232 is disposed, along which the second baffle flange connection 234 is disposed, and/or along which the perforated plate edge 242 is disposed. The length of the second outside portion fin 282 is less than the length of the second outside portion hole 284 adjacent to the second outside portion fin 282. The length of the second outside portion fins 282 increases from a minimum length of the second outside portion fins 282 located near the second perforated plate corner portion 256 to a maximum length of the second outside portion fins 282 located near the perforated plate edge 242. This arrangement and configuration of the second outside portion fins 282 helps to mitigate backflow of exhaust gases past the baffle 224 and mitigates the formation of deposits on the baffle 224.

In some embodiments, a first spacing between at least one adjacent pair of second outboard portion holes 284 is equal to a second spacing between at least one adjacent pair of center portion holes 278. In various embodiments, the sum of the cross-sectional areas of the second outboard portion apertures 284 is less than the sum of the cross-sectional areas of the center portion apertures 278. For example, the sum of the cross-sectional areas of the second outboard portion holes 284 may be approximately equal to 0.2 μ to 0.5 μ, inclusive, where μ is the sum of the cross-sectional areas of the center portion holes 278. In some embodiments, the sum of the cross-sectional areas of the second outboard portion apertures 284 is approximately equal to the sum of the cross-sectional areas of the first outboard portion apertures 272.

FIG. 11 shows a detailed view of center portion fin 276 and center portion hole 278, however, it should be understood that similar detailed views of first outboard portion fin 270, first outboard portion hole 272, second outboard portion fin 282, and second outboard portion hole 284 may be similarly shown β₂Shown as approximately equal to 60. Each of the center portion fins 276 has a length L₂And has a rear edge distance R spaced from the rear edge of the baffle 224₂And has a front edge distance F spaced from the rear edge of the baffle 224₂The front edge of (a). In some embodiments, L₂Approximately equal to between 9 millimeters (mm) and 13mm, inclusive. In some embodiments, R₂Approximately equal to between 8mm and 11mm, including 8mm and 11 mm. In some embodiments, F₂Approximately equal to between 18.5mm and 21.5mm, inclusive of 18.5mm and 21.5 mm. For all center section fins 276, L₂、R₂And F₂May be the same. It is understood that the first outer side portion fin 270 and the second outer side portion fin 282 may be similar in size and shape to the central portion fin 276.

In general, the first and

second separating portions

262 and 266 form a V-shape. This shape provides structural strength to the first outboard portion 268 (e.g., first outboard portion fins 270, etc.), the central portion 274 (e.g., central portion fins 276, etc.), and the second outboard portion 280 (e.g., second outboard portion fins 282, etc.).

In some embodiments, the baffle 224 is symmetric about a plane (e.g., the baffle plane 264, etc.) that bisects the baffle 224. In some embodiments, the baffle 224 is formed from one piece of material. For example, the baffle 224 may be formed by a stamping process. In these embodiments, each component of the baffle 224 is integrally formed with the other components of the baffle 224. For example, the first outer side portion fin 270 is integrally formed with the center portion fin 276 and the second outer side portion fin 282.

The reductant delivery system body 202 includes an outlet body 286 (e.g., a shell, a frame, an assembly, etc.). The outlet body 286 is coupled to the transfer housing 214 and is separated from the inlet body 204 by the transfer housing 214. The outlet body 286 includes an outlet body outlet 288 (e.g., an opening, a hole, etc.). The outlet body outlet 288 is configured to provide exhaust gas from the reductant delivery system 200 back to the exhaust gas conduit system 104. In some embodiments, the reductant delivery system 200 is located upstream of the SCR catalyst component 108 such that the SCR catalyst component 108 receives exhaust gas from the outlet body outlet.

The outlet body 286 includes an outlet body coupler 290 (e.g., a body, etc.). The outlet body coupler 290 defines (e.g., is looped, etc.) an outlet body outlet 288. The outlet body coupler 290 is coupled (e.g., attached to, secured to, welded to, integrated into, etc.) the exhaust gas conduit system 104 about (e.g., around, etc. the outlet body outlet 288. In various embodiments, the outlet body coupler 290 is circular.

Construction of the example embodiment

While this specification contains many specific implementation details, these should not be construed as limitations on the scope of what may be claimed, but rather as descriptions of features specific to particular implementations. Certain features that are described in this specification in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination. Furthermore, although features may be described as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a subcombination or variation of a subcombination.

As utilized herein, the terms "substantially," "about," and similar terms are intended to have a broad meaning consistent with the common and accepted usage by those of ordinary skill in the art to which the subject matter of this disclosure pertains. Those skilled in the art who review this disclosure will appreciate that these terms are intended to allow description of certain features described and claimed without limiting the scope of these features to the precise numerical ranges provided. Accordingly, these terms should be interpreted as indicating that insubstantial or inconsequential modifications or changes in the subject matter described and claimed are considered to be within the scope of the utility model as recited in the appended claims.

The term "coupled" and similar terms as used herein mean that two components are joined to each other either directly or indirectly. Such joining may be fixed (e.g., permanent) or movable (e.g., removable or releasable). Such a coupling can be achieved in the following cases: two components or the two components and any additional intermediate components are integrally formed as a single unitary body with one another or the two components and any additional intermediate components are attached to one another.

The term "fluidly coupled to" and similar terms as used herein mean that two components or objects have a passageway formed therebetween through which a fluid (e.g., air, exhaust gas, liquid reductant, gaseous reductant, aqueous reductant, gaseous ammonia, etc.) may flow with or without an intervening component or object. Examples of fluid couplings or configurations for achieving fluid communication may include pipes, channels, or any other suitable components for achieving a flow of fluid from one component or object to another component or object.

It is important to note that the construction and arrangement of the various systems shown in the various exemplary embodiments are illustrative only and not limiting in nature. All changes and modifications that come within the spirit and/or scope of the described embodiments are desired to be protected. It should be understood that some features may not be necessary and embodiments lacking the same may be contemplated as within the scope of the disclosure, the scope being defined by the claims that follow. When the language "a portion" is used, the item can include a portion and/or the entire item unless specifically stated to the contrary.

Furthermore, the term "or" is used in the context of a list of elements in its inclusive sense (and not in its exclusive sense) such that when used in conjunction with a list of elements, the term "or" means one, some, or all of the elements in the list. Unless expressly stated otherwise, conjunctive language such as the phrase "X, Y and at least one of Z" is understood in the context of use as being commonly used to express items, terms, etc. that 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). Thus, such conjunctive language is not generally intended to imply that certain embodiments require at least one of X, at least one of Y, and at least one of Z to each be present, unless otherwise indicated.

In addition, unless otherwise indicated, the use of value ranges herein (e.g., W1-W2, etc.) include their maximum and minimum values (e.g., W1-W2 include W1 and include W2, etc.). Further, unless otherwise indicated, a range of values (e.g., W1-W2, etc.) does not necessarily require the inclusion of intermediate values within the range of values (e.g., W1-W2 may include only W1 and W2, etc.).

Claims

1. A baffle for a reductant delivery system, the baffle comprising:

a baffle flange; and

2. The baffle of claim 1, wherein the first partition portion and the second partition portion are arranged in a V-shape.

3. The baffle plate of claim 1, wherein:

4. The baffle of any of claims 1-3, wherein:

5. The baffle of any of claims 1-3, wherein the baffle flange comprises:

a second baffle flange curved portion extending along the second outer portion.

6. The baffle of claim 5, wherein the baffle flange further comprises:

7. The baffle of claim 6, wherein the perforated plate further comprises:

8. The baffle of claim 6 or 7, wherein the perforated plate further comprises:

9. A baffle for a reductant delivery system, the baffle comprising:

a baffle flange, comprising:

a first baffle flange curved portion;

a second shutter flange bent portion;

10. The baffle of claim 9, wherein the perforated plate further comprises:

11. The baffle plate of claim 9, wherein each of the plurality of central portion fins is separated from another of the plurality of central portion fins by one of the plurality of central portion holes.

12. The baffle of any of claims 9-11, wherein a first number of the plurality of central portion fins is equal to a second number of the plurality of central portion holes.

13. The baffle of any of claims 9-11, wherein the plurality of central portion apertures are arranged within a trapezoid defined in part by the first baffle flange connection portion.

14. The baffle of claim 13, wherein the perforated plate further comprises:

15. The baffle plate of claim 14, wherein: