Exhaust aftertreatment device

Abstract

An exhaust aftertreatment device includes a housing, an exhaust inlet tube, a carrier assembly, and a silencing assembly. The shell comprises an inner cavity and a first baffle located in the inner cavity. The first baffle is provided with a first concave part, and the first concave part forms a first airflow cavity. The exhaust gas inlet pipe is fixed to the shell, and the exhaust gas inlet pipe is configured to be connected with a manifold of an engine. The carrier assembly comprises a second baffle and a post-processing carrier device erected on the second baffle. The second baffle and the first baffle are arranged in a spaced mode, the inner cavity comprises an air inlet cavity located between the first baffle and the second baffle, the exhaust inlet pipe is communicated with the air inlet cavity, and the air inlet cavity is communicated with the first airflow cavity. The silencing assembly is at least partially located in the shell. By means of the arrangement, the exhaust aftertreatment device is of an integrated design which is compact in structure.

Description

Background Art

[0002] The exhaust aftertreatment device in the related art usually includes a hot end and a cold end, wherein the hot end is close to the manifold of the engine and includes a catalyst for treating harmful substances in the exhaust gas; the cold end is located at the rear of the vehicle and usually serves as a muffler.

[0003] Of course, with the continuous development of hybrid vehicles, the exhaust after-treatment device in the related art is usually located at the layout position of the vehicle battery because its cold end is not conducive to the expansion and layout of the battery.

[0004] Therefore, it is necessary to improve the exhaust gas aftertreatment device in the related art. Summary of the invention

[0005] The object of the present invention is to provide an exhaust gas aftertreatment device with a compact structure.

[0006] To achieve the above object, the present invention adopts the following technical solution: an exhaust gas aftertreatment device, comprising:

[0007] A housing, the housing comprising an inner cavity and a first baffle located in the inner cavity, the first baffle being provided with a first recessed portion, the first recessed portion forming a first airflow cavity;

[0008] an exhaust inlet pipe, the exhaust inlet pipe being fixed to the housing, the exhaust inlet pipe being configured to be connected to a manifold of an engine;

[0009] A carrier assembly, the carrier assembly comprising a second baffle and a post-processing carrier device mounted on the second baffle, the post-processing carrier device comprising an inlet end face and an outlet end face, the first airflow cavity is close to the inlet end face of the post-processing carrier device, the first recessed portion is recessed in a direction away from the post-processing carrier device, the second baffle is spaced apart from the first baffle, the inner cavity comprises an intake cavity located between the first baffle and the second baffle, the exhaust inlet pipe is in communication with the intake cavity, and the intake cavity is in communication with the first airflow cavity; and

[0010] A sound attenuation assembly is at least partially located within the housing.

[0011] As a further improved technical solution of the present invention, the first recessed portion is integrally stamped from the first baffle, and the first airflow cavity is located on one side of the inlet end surface of the post-processing carrier device along the axial direction of the post-processing carrier device.

[0012] As a further improved technical solution of the present invention, the axial direction of the exhaust inlet pipe is perpendicular to the axial direction of the post-treatment carrier device.

[0013] As a further improved technical solution of the present invention, the carrier assembly includes a third baffle plate spaced apart from the second baffle plate, and the post-processing carrier device is mounted on the second baffle plate and the third baffle plate;

[0014] The inner cavity comprises a first cavity located between the second baffle plate and the third baffle plate, a second cavity located on a side of the third baffle plate away from the first cavity, and a third cavity located on a side of the first baffle plate away from the second baffle plate;

[0015] The outlet end surface of the post-processing carrier device is communicated with the second cavity.

[0016] As a further improved technical solution of the present invention, the exhaust gas after-treatment device further includes a connecting pipe connecting the second cavity and the third cavity.

[0017] As a further improved technical solution of the present invention, the silencer assembly is at least partially located in the third cavity, and the silencer assembly includes a fourth baffle and a silencer pipe fixed on the fourth baffle, the fourth baffle is located in the third cavity to divide the third cavity into a first air outlet cavity located between the first baffle and the fourth baffle and a second air outlet cavity located on a side of the fourth baffle away from the first baffle, and the fourth baffle is provided with a plurality of connecting holes connecting the first air outlet cavity and the second air outlet cavity.

[0018] As a further improved technical solution of the present invention, the silencer pipe includes a first tube body portion passing through the fourth baffle, a second tube body portion bent from the first tube body portion, and a third tube body portion bent from the second tube body portion, the first tube body portion, the second tube body portion and the third tube body portion are U-shaped as a whole, the first tube body portion protrudes into the first air outlet cavity, the second tube body portion is located in the second air outlet cavity, and the third tube body portion is at least partially located in the first air outlet cavity.

[0019] As a further improved technical solution of the present invention, the first tube body portion, the second tube body portion and the third tube body portion are all provided with a plurality of through holes penetrating the tube wall.

[0020] As a further improved technical solution of the present invention, the silencer pipe also includes a fourth tube body portion bent from the third tube body portion, the fourth tube body portion penetrates the shell, and the third tube body portion is mounted on the first baffle plate and the fourth baffle plate.

[0021] As a further improved technical solution of the present invention, the exhaust inlet pipe is directly connected to the manifold of the engine, and the exhaust inlet pipe is close to the manifold of the engine.

[0022] As a further improved technical solution of the present invention, the exhaust after-treatment device also includes an annular shell fixed between the first baffle and the second baffle, the annular shell at least partially surrounds the outer periphery of the after-treatment carrier device, and the intake cavity is an annular space located between the annular shell and the after-treatment carrier device.

[0023] As a further improved technical solution of the present invention, the exhaust inlet pipe is fixed to the annular shell, one end of the annular shell is welded and fixed to the first baffle and covers the outer edge of the first airflow cavity, and the other end of the annular shell is welded and fixed to the second baffle.

[0024] Compared with the prior art, the exhaust aftertreatment device of the present invention comprises a housing, an exhaust inlet pipe, a carrier assembly and a muffler assembly, wherein the exhaust inlet pipe is configured to be connected to the manifold of the engine, and the carrier assembly and the muffler assembly are both arranged in the housing. With such an arrangement, the exhaust aftertreatment device is a compact integrated design, which can not only purify harmful substances in the exhaust gas through the carrier assembly, but also perform acoustic treatment and reduce noise through the muffler assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional schematic diagram of an exhaust gas after-treatment device of the present invention in one embodiment.

[0026] Figure 2 yes Figure 1 A partial enlarged view of the middle part of the structure.

[0027] Figure 3 yes Figure 1 Partial three-dimensional perspective view of the exhaust aftertreatment device.

[0028] Figure 4 yes Figure 3 Partial exploded view of the .

[0029] Figure 5 yes Figure 3 A three-dimensional schematic diagram of some components in the middle.

[0030] Figure 6 yes Figure 3 A three-dimensional schematic diagram of another part of the components. DETAILED DESCRIPTION

[0031] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, where if there are several specific embodiments, the features of these embodiments can be combined with each other without conflict. When the description refers to the drawings, unless otherwise specified, the same numbers or symbols in different drawings represent the same or similar elements. The contents described in the following exemplary specific embodiments do not represent all embodiments of the present invention. On the contrary, they are only examples of products consistent with the present invention as recorded in the claims of the present invention.

[0032] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention. It should be understood that the words "first", "second" and the like used in the specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish the names of features.

[0033] Please refer to Figures 1 to 6 As shown, the present invention discloses an exhaust gas after-treatment device 100 , which includes a housing 1 , an exhaust gas inlet pipe 2 , a carrier component 3 , a muffler component 4 and an exhaust pipe 5 .

[0034] In the illustrated embodiment of the present invention, the housing 1 includes a first housing 11 and a second housing 12 fixed to the first housing 11. The housing 1 includes an inner cavity 10, and the inner cavity 10 is located between the first housing 11 and the second housing 12. In one embodiment of the present invention, the first housing 11 and the second housing 12 are both made of metal materials, and the first housing 11 and the second housing 12 are welded and fixed together.

[0035] The exhaust inlet pipe 2 is fixed to the housing 1, and the exhaust inlet pipe 2 is configured to be connected to the manifold 6 of the engine. In the illustrated embodiment of the present invention, the exhaust inlet pipe 2 is welded and fixed between the first housing 11 and the second housing 12. In the illustrated embodiment of the present invention, the exhaust inlet pipe 2 is directly connected to the manifold 6 of the engine, and the exhaust inlet pipe 2 is close to the manifold 6 of the engine. In this way, the housing 1 can be installed at a position close to the manifold 6 of the engine. The exhaust gas flowing out of the manifold 6 of the engine flows to the inner cavity 10 of the housing 1 through the exhaust inlet pipe 2.

[0036] Please combine Figure 3 as well as Figure 4As shown, in the illustrated embodiment of the present invention, the housing 1 further comprises a first baffle 13 located in the inner cavity 10. The first baffle 13 is provided with a first recessed portion 131, and the first recessed portion 131 forms a first airflow cavity 1310. In the illustrated embodiment of the present invention, the first recessed portion 131 is integrally stamped from the first baffle 13.

[0037] In the illustrated embodiment of the present invention, the carrier assembly 3 includes a second baffle 32 , a third baffle 33 spaced apart from the second baffle 32 , and a post-processing carrier device 31 mounted on the second baffle 32 and the third baffle 33 .

[0038] The post-processing carrier device 31 includes an inlet end face 311 and an outlet end face 312. Structurally, the post-processing carrier device 31 includes a metal shell 313 and a post-processing carrier 314 encapsulated in the metal shell 313. The inlet end face 311 and the outlet end face 312 are respectively located at two ends of the post-processing carrier 314. The first airflow cavity 1310 is close to the inlet end face 311 of the post-processing carrier device 31, and the first recessed portion 131 is recessed in a direction away from the post-processing carrier device 31. Specifically, the first airflow cavity 1310 is located on one side of the inlet end face 311 of the post-processing carrier device 31 along the axial direction of the post-processing carrier device 31.

[0039] In the illustrated embodiment of the present invention, the axial direction of the exhaust gas inlet pipe 2 is perpendicular to the axial direction of the aftertreatment carrier device 31 .

[0040] In the illustrated embodiment of the present invention, the third baffle 33, the second baffle 32 and the first baffle 13 are sequentially arranged at intervals along the axial direction of the post-processing carrier device 31. The inner cavity 10 includes an air intake cavity 104 located between the first baffle 13 and the second baffle 32, a first cavity 101 located between the second baffle 32 and the third baffle 33, a second cavity 102 located on the side of the third baffle 33 away from the first cavity 101, and a third cavity 103 located on the side of the first baffle 13 away from the second baffle 32. The exhaust inlet pipe 2 is connected to the air intake cavity 104, and the air intake cavity 104 is connected to the first airflow cavity 1310. By setting the first airflow cavity 1310, the space is cleverly expanded without increasing the overall external dimensions. The outlet end face 312 of the post-processing carrier device 31 is connected to the second cavity 102.

[0041] In the illustrated embodiment of the present invention, the exhaust aftertreatment device 100 further includes a connecting pipe 7 connecting the second cavity 102 and the third cavity 103. The connecting pipe 7 is mounted on the third baffle 33, the second baffle 32 and the first baffle 13.

[0042] The muffler assembly 4 is at least partially located in the housing 1. In the illustrated embodiment of the present invention, the muffler assembly 4 is at least partially located in the third cavity 103. The muffler assembly 4 includes a fourth baffle 41 and a muffler pipe 42 fixed to the fourth baffle 41. The fourth baffle 41 is located in the third cavity 103 to divide the third cavity 103 into a first air outlet cavity 1031 located between the first baffle 13 and the fourth baffle 41 and a second air outlet cavity 1032 located on a side of the fourth baffle 41 away from the first baffle 13, and the fourth baffle 41 is provided with a plurality of connecting holes 410 connecting the first air outlet cavity 1031 and the second air outlet cavity 1032.

[0043] The muffler 42 includes a first tube body portion 421 penetrating the fourth baffle 41, a second tube body portion 422 bent from the first tube body portion 421, a third tube body portion 423 bent from the second tube body portion 422, and a fourth tube body portion 424 bent from the third tube body portion 423. The first tube body portion 421, the second tube body portion 422, and the third tube body portion 423 are U-shaped as a whole. The first tube body portion 421 protrudes into the first air outlet cavity 1031, the second tube body portion 422 is located in the second air outlet cavity 1032, and the third tube body portion 423 is at least partially located in the first air outlet cavity 1031. The first tube body portion 421, the second tube body portion 422, and the third tube body portion 423 are all provided with a plurality of through holes 420 penetrating the tube wall.

[0044] In the illustrated embodiment of the present invention, the third tube body portion 423 is mounted on the first baffle plate 13 and the fourth baffle plate 41. The fourth tube body portion 424 penetrates the housing 1 to be connected to the air outlet pipe 5.

[0045] Please combine Figure 3As shown, when the exhaust gas flows into the first cavity 101 from the exhaust gas inlet pipe 2, the exhaust gas flows from the first airflow cavity 1310 to the inlet end face 311 of the post-processing carrier device 31 under the obstruction of the second baffle 32. In the illustrated embodiment of the present invention, the space between the first baffle 13 and the second baffle 32 and / or the third baffle 33 is a sealed space, so that heat can be effectively kept warm to prevent heat loss. In the illustrated embodiment of the present invention, the first recessed portion 131 is arc-shaped so that the airflow can be distributed to the inlet end face 311 of the post-processing carrier device 31 as evenly as possible. Then, the exhaust gas flows through the post-processing carrier 314 of the post-processing carrier device 31 to purify the exhaust gas. Subsequently, the exhaust gas flows into the second cavity 102 and enters the third cavity 103 through the connecting pipe 7. Then, the exhaust gas flows into the outlet pipe 5 through the muffler 42. Preferably, in order to improve the silencing performance, the exhaust after-treatment device 100 further includes silencing cotton 8 filled in the second air outlet cavity 1032 .

[0046] In the illustrated embodiment of the present invention, as a further improved technical solution, the exhaust aftertreatment device 100 further includes an annular housing 14 fixed between the first baffle 13 and the second baffle 32. The annular housing 14 at least partially surrounds the outer periphery of the aftertreatment carrier device 31. The air intake cavity 104 is an annular space 141 located between the annular housing 14 and the aftertreatment carrier device 31. The exhaust inlet pipe 2 is fixed to the annular housing 14, one end of the annular housing 14 is welded and fixed to the first baffle 13 and covers the outer edge of the first airflow cavity 1310, and the other end of the annular housing 14 is welded and fixed to the second baffle 32.

[0047] Those skilled in the art will appreciate that, by providing the annular housing 14, the exhaust gas flowing in from the exhaust inlet pipe 2 can be better guided from the first airflow cavity 1310 to the inlet end surface 311 of the post-processing carrier device 31. In the illustrated embodiment of the present invention, the annular housing 14 is not in direct contact with the first housing 11 and the second housing 12, so that heat can be effectively kept in good condition to prevent heat loss.

[0048] Those skilled in the art will appreciate that the hot end and the cold end in the related art are integrated in the exhaust aftertreatment device 100 of the present invention. The outlet pipe 5 is a pipe for the airflow to be led out, so the pipe diameter, length and extension direction of the outlet pipe 5 can be flexibly adjusted as needed. The outlet pipe 5 is mounted on the chassis of the vehicle through a rubber hanging ear 51.

[0049] Compared with the prior art, the exhaust aftertreatment device 100 of the present invention includes a housing 1, an exhaust inlet pipe 2, a carrier assembly 3 and a muffler assembly 4, wherein the exhaust inlet pipe 2 is configured to be connected to the manifold 6 of the engine, and the carrier assembly 3 and the muffler assembly 4 are both arranged in the housing 1. In this way, the exhaust aftertreatment device 100 is a compact integrated design, which can not only purify harmful substances in the exhaust through the carrier assembly 3, but also perform acoustic treatment through the muffler assembly 4 to reduce noise. In addition, the housing 1 of the present invention can be arranged at a position close to the engine, which can reduce the loss in the heat transfer process, so that the aftertreatment carrier 314 can quickly heat up to the operating temperature, reduce the pollutant emission of the engine cold start, and play a muffler role. The exhaust aftertreatment device 100 of the present invention has a compact structure and occupies a small space. It can effectively utilize the space in the engine compartment. There is no need to arrange a muffler on the chassis. The saved space can be used to arrange more batteries, thereby increasing the vehicle's cruising range.

[0050] The above embodiments are only used to illustrate the present invention but not to limit the technical solutions described in the present invention. The understanding of this specification should be based on the technicians in the relevant technical field. Although this specification has described the present invention in detail with reference to the above embodiments, ordinary technicians in the field should understand that technicians in the relevant technical field can still modify or replace the present invention with equivalents, and all technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. An exhaust gas aftertreatment device, characterized in that: include: A housing, the housing comprising an inner cavity and a first baffle located in the inner cavity, the first baffle being provided with a first recessed portion, the first recessed portion forming a first airflow cavity; an exhaust inlet pipe, the exhaust inlet pipe being fixed to the housing, the exhaust inlet pipe being configured to be connected to a manifold of an engine; A carrier assembly, the carrier assembly comprising a second baffle and a post-processing carrier device mounted on the second baffle, the post-processing carrier device comprising an inlet end face and an outlet end face, the first airflow cavity is close to the inlet end face of the post-processing carrier device, the first recessed portion is recessed in a direction away from the post-processing carrier device, the second baffle is spaced apart from the first baffle, the inner cavity comprises an intake cavity located between the first baffle and the second baffle, the exhaust inlet pipe is in communication with the intake cavity, and the intake cavity is in communication with the first airflow cavity; and A sound attenuation assembly is at least partially located within the housing.

2. The exhaust gas aftertreatment device according to claim 1, characterized in that: The first recessed portion is integrally stamped from the first baffle, and the first airflow cavity is located at one side of the inlet end surface of the post-processing carrier device along the axial direction of the post-processing carrier device.

3. The exhaust gas aftertreatment device according to claim 1, characterized in that: The axial direction of the exhaust gas inlet pipe is perpendicular to the axial direction of the aftertreatment carrier device.

4. The exhaust gas aftertreatment device according to claim 1, characterized in that: The carrier assembly comprises a third baffle plate spaced apart from the second baffle plate, and the post-processing carrier device is mounted on the second baffle plate and the third baffle plate; The inner cavity comprises a first cavity located between the second baffle plate and the third baffle plate, a second cavity located on a side of the third baffle plate away from the first cavity, and a third cavity located on a side of the first baffle plate away from the second baffle plate; The outlet end surface of the post-processing carrier device is communicated with the second cavity.

5. The exhaust gas aftertreatment device according to claim 4, characterized in that: The exhaust gas after-treatment device further includes a connecting pipe connecting the second cavity and the third cavity.

6. The exhaust gas aftertreatment device according to claim 5, characterized in that: The silencer assembly is at least partially located in the third cavity, and includes a fourth baffle and a silencer pipe fixed on the fourth baffle. The fourth baffle is located in the third cavity to divide the third cavity into a first air outlet cavity located between the first baffle and the fourth baffle and a second air outlet cavity located on a side of the fourth baffle away from the first baffle. The fourth baffle is provided with a plurality of connecting holes connecting the first air outlet cavity and the second air outlet cavity.

7. The exhaust gas aftertreatment device according to claim 6, characterized in that: The silencer pipe includes a first tube body portion passing through the fourth baffle, a second tube body portion bent from the first tube body portion, and a third tube body portion bent from the second tube body portion, the first tube body portion, the second tube body portion and the third tube body portion are U-shaped as a whole, the first tube body portion protrudes into the first air outlet cavity, the second tube body portion is located in the second air outlet cavity, and the third tube body portion is at least partially located in the first air outlet cavity.

8. The exhaust gas aftertreatment device according to claim 7, characterized in that: The first tube body portion, the second tube body portion and the third tube body portion are all provided with a plurality of through holes penetrating through the tube wall.

9. The exhaust gas aftertreatment device according to claim 7, characterized in that: The silencer pipe further includes a fourth tube body portion bent from the third tube body portion, the fourth tube body portion penetrates the shell, and the third tube body portion is mounted on the first baffle plate and the fourth baffle plate.

10. The exhaust gas aftertreatment device according to any one of claims 1 to 9, characterized in that: The exhaust gas inlet pipe is directly connected to the manifold of the engine, and the exhaust gas inlet pipe is close to the manifold of the engine.

11. The exhaust gas aftertreatment device according to any one of claims 1 to 9, characterized in that: The exhaust aftertreatment device further comprises an annular shell fixed between the first baffle and the second baffle, the annular shell at least partially surrounds the outer circumference of the aftertreatment carrier device, and the intake cavity is an annular space located between the annular shell and the aftertreatment carrier device.

12. The exhaust gas aftertreatment device according to claim 11, characterized in that: The exhaust inlet pipe is fixed to the annular shell, one end of the annular shell is welded and fixed to the first baffle and covers the outer edge of the first airflow cavity, and the other end of the annular shell is welded and fixed to the second baffle.

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