Exhaust aftertreatment device
By designing a compact exhaust aftertreatment device that integrates the hot and cold ends, the problem of limited battery placement is solved, achieving purification and noise reduction effects and improving the vehicle's range.
Patent Information
- Application Number
- CN202423154037.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-19
AI Technical Summary
The cold end of existing exhaust aftertreatment devices is usually located where the vehicle battery is placed, which limits battery capacity expansion and placement.
A compact exhaust aftertreatment device is designed, including a housing, an exhaust inlet pipe, a carrier assembly, and a muffler assembly. The hot and cold ends are integrated together through integrated design. A first baffle and a second baffle are set inside the housing to form an airflow cavity. The muffler assembly is located inside the housing to achieve purification and noise reduction functions.
It achieves the purification of harmful substances in exhaust and the reduction of noise, reduces heat loss, increases battery placement space, and increases the vehicle's driving range.
Smart Images
Figure CN223647903U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an exhaust aftertreatment device, belonging to the technical field of engine exhaust system. Background Technology
[0002] Exhaust aftertreatment devices in related technologies typically include a hot end and a cold end, wherein the hot end is close to the engine manifold and includes a catalytic converter for treating harmful substances in the exhaust; the cold end is located at the rear of the vehicle and typically serves to muffle noise.
[0003] Of course, with the continuous development of hybrid vehicles, the exhaust aftertreatment device in related technologies is often located at the vehicle battery location because its cold end is usually located there, which is not conducive to the expansion and arrangement of the battery.
[0004] Therefore, it is necessary to improve the exhaust aftertreatment devices in the relevant technologies. Utility Model Content
[0005] The purpose of this invention is to provide a compact exhaust aftertreatment device.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: an exhaust aftertreatment device, comprising:
[0007] A housing, the housing including an inner cavity and a first baffle located in the inner 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 the engine manifold;
[0009] A carrier assembly, comprising a second baffle and a post-treatment carrier device mounted on the second baffle, the post-treatment carrier device including an inlet end face and an outlet end face, the second baffle being spaced apart from the first baffle, the inner cavity including an air intake cavity located between the first baffle and the second baffle, the exhaust inlet pipe being connected to the air intake cavity, and the air intake cavity being in fluid communication with the inlet end face of the post-treatment carrier device; and
[0010] A noise reduction assembly, which is at least partially located within the housing.
[0011] As a further improvement of the present invention, the first baffle is provided with a first recessed portion, the first recessed portion forming a first airflow cavity, the first airflow cavity being close to the inlet end face of the post-processing carrier device, the first recessed portion being recessed in a direction away from the post-processing carrier device, and the air inlet cavity being in fluid communication with the inlet end face of the post-processing carrier device through the first recessed portion.
[0012] As a further improvement of the present invention, the first recess is integrally stamped from the first baffle, and the first airflow cavity is located on one side of the inlet end face of the post-processing carrier device along the axial direction of the post-processing carrier device.
[0013] As a further improvement of this utility model, the axial direction of the exhaust inlet pipe is perpendicular to the axial direction of the post-treatment carrier device.
[0014] As a further improvement of the present invention, the carrier assembly includes a third baffle that is spaced apart from the second baffle, and the post-processing carrier device is mounted on the second baffle and the third baffle.
[0015] The inner cavity includes a first cavity located between the second baffle and the third baffle, a second cavity located on the side of the third baffle away from the first cavity, and a third cavity located on the side of the first baffle away from the second baffle.
[0016] The outlet end face of the post-processing carrier device is connected to the second cavity.
[0017] As a further improvement of the present invention, the exhaust aftertreatment device further includes a connecting pipe that connects the second cavity and the third cavity.
[0018] As a further improvement of the present invention, the silencing component is at least partially located in the third cavity. The silencing component includes a fourth baffle and a silencing 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 the side of the fourth baffle away from the first baffle. The fourth baffle is provided with a plurality of connecting holes that connect the first air outlet cavity and the second air outlet cavity.
[0019] As a further improvement of the present invention, the silencer includes a first tube portion passing through the fourth baffle, a second tube portion bent from the first tube portion, and a third tube portion bent from the second tube portion. The first tube portion, the second tube portion, and the third tube portion are U-shaped as a whole. The first tube portion protrudes into the first air outlet cavity, the second tube portion is located in the second air outlet cavity, and the third tube portion is at least partially located in the first air outlet cavity.
[0020] As a further improvement of the present invention, the first tube body, the second tube body, and the third tube body are all provided with several through holes penetrating the tube wall.
[0021] As a further improvement of the present invention, the silencer pipe further includes a fourth pipe section bent from the third pipe section, the fourth pipe section penetrating the housing, and the third pipe section mounted on the first baffle and the fourth baffle.
[0022] As a further improvement of this utility model, 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.
[0023] As a further improvement of the present invention, the exhaust aftertreatment device further includes an annular housing fixed between the first baffle and the second baffle. The annular housing at least partially surrounds the outer periphery of the aftertreatment carrier device, and the intake cavity is an annular space located between the annular housing and the aftertreatment carrier device.
[0024] As a further improvement 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.
[0025] Compared to existing technologies, the exhaust aftertreatment device of this utility model includes a housing, an exhaust inlet pipe, a carrier assembly, and a muffler assembly. The exhaust inlet pipe is configured to connect to the engine manifold, and both the carrier assembly and the muffler assembly are housed within the housing. This configuration results in a compact and integrated exhaust aftertreatment device that can both purify harmful substances in the exhaust through the carrier assembly and reduce noise through the muffler assembly. Attached Figure Description
[0026] Figure 1 This is a three-dimensional schematic diagram of one embodiment of the exhaust aftertreatment device of this utility model.
[0027] Figure 2 yes Figure 1 A magnified view of a portion of the central structure.
[0028] Figure 3 yes Figure 1 Partial perspective view of the exhaust aftertreatment device.
[0029] Figure 4 yes Figure 3 Partial exploded 3D diagram.
[0030] Figure 5 yes Figure 3 A three-dimensional schematic diagram of the middle component.
[0031] Figure 6 yes Figure 3 A three-dimensional schematic diagram of another component. Detailed Implementation
[0032] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Where several specific embodiments exist, features in these embodiments can be combined with each other without conflict. When the description relates to the drawings, unless otherwise stated, the same numbers or symbols in different drawings represent the same or similar elements. The content described in the following exemplary embodiments does not represent all embodiments of this utility model; rather, they are merely examples of products consistent with this utility model and as described in the claims.
[0033] The terminology used in this invention is for the purpose of describing specific embodiments only and is not intended to limit the scope of protection of this invention. It should be understood that terms such as "first," "second," and similar words used in the specification and claims of this invention do not indicate any order, quantity, or importance, but are merely used to distinguish the features.
[0034] Please refer to Figures 1 to 6 As shown, this utility model discloses an exhaust aftertreatment device 100, which includes a housing 1, an exhaust inlet pipe 2, a carrier assembly 3, a silencer assembly 4, and an exhaust pipe 5.
[0035] In the embodiment illustrated in this utility model, 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, which is located between the first housing 11 and the second housing 12. In one embodiment of this utility model, both the first housing 11 and the second housing 12 are made of metal material, and the first housing 11 and the second housing 12 are welded together.
[0036] The exhaust inlet pipe 2 is fixed to the housing 1 and is configured to connect to the engine manifold 6. In the embodiment illustrated in the present invention, the exhaust inlet pipe 2 is welded and fixed between the first housing 11 and the second housing 12. In the embodiment illustrated in the present invention, the exhaust inlet pipe 2 is directly connected to the engine manifold 6, and the exhaust inlet pipe 2 is close to the engine manifold 6. With this configuration, the housing 1 can be installed close to the engine manifold 6. The exhaust gas flowing from the engine manifold 6 flows through the exhaust inlet pipe 2 to the inner cavity 10 of the housing 1.
[0037] Please combine Figure 3 as well as Figure 4As shown in the illustrated embodiment of this utility model, the housing 1 further includes a first baffle 13 located in the inner cavity 10. The first baffle 13 has a first recess 131, which forms a first airflow cavity 1310. In the illustrated embodiment of this utility model, the first recess 131 is integrally stamped from the first baffle 13.
[0038] In the embodiment illustrated in this utility model, 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.
[0039] 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 housing 313 and a post-processing carrier 314 encapsulated within the metal housing 313. The inlet end face 311 and the outlet end face 312 are located at opposite ends of the post-processing carrier 314. The first airflow cavity 1310 is located near the inlet end face 311 of the post-processing carrier device 31, and the first recess 131 is recessed 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.
[0040] In the embodiment illustrated in this utility model, the axial direction of the exhaust inlet pipe 2 is perpendicular to the axial direction of the post-treatment carrier device 31.
[0041] In the embodiment illustrated in this utility model, the third baffle 33, the second baffle 32, and the first baffle 13 are arranged sequentially 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.
[0042] In the embodiment illustrated in this utility model, the exhaust aftertreatment device 100 further includes a connecting pipe 7 that connects 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.
[0043] The silencing component 4 is at least partially located within the housing 1. In the embodiment illustrated in this utility model, the silencing component 4 is at least partially located within the third cavity 103. The silencing component 4 includes a fourth baffle 41 and a silencing pipe 42 fixed to the fourth baffle 41. The fourth baffle 41 is located within 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 the side of the fourth baffle 41 away from the first baffle 13. The fourth baffle 41 is provided with a plurality of communicating holes 410 connecting the first air outlet cavity 1031 and the second air outlet cavity 1032.
[0044] The silencer pipe 42 includes a first pipe section 421 passing through the fourth baffle 41, a second pipe section 422 bent from the first pipe section 421, a third pipe section 423 bent from the second pipe section 422, and a fourth pipe section 424 bent from the third pipe section 423. The first pipe section 421, the second pipe section 422, and the third pipe section 423 are generally U-shaped. The first pipe section 421 protrudes into the first air outlet chamber 1031, the second pipe section 422 is located in the second air outlet chamber 1032, and the third pipe section 423 is at least partially located in the first air outlet chamber 1031. The first pipe section 421, the second pipe section 422, and the third pipe section 423 are each provided with a plurality of through holes 420 penetrating the pipe wall.
[0045] In the embodiment illustrated in this utility model, the third tube portion 423 is mounted on the first baffle 13 and the fourth baffle 41. The fourth tube portion 424 penetrates the housing 1 to connect with the air outlet pipe 5.
[0046] Please combine Figure 3As shown, after exhaust gas flows into the first cavity 101 from the exhaust inlet pipe 2, the exhaust gas, blocked by the second baffle 32, flows from the first airflow cavity 1310 to the inlet end face 311 of the post-treatment carrier device 31. In the embodiment illustrated in this utility model, the space between the first baffle 13 and the second baffle 32 and / or the third baffle 33 is a sealed space, thereby effectively keeping the temperature warm and preventing heat loss. In the embodiment illustrated in this utility model, the first recess 131 is arc-shaped to distribute the airflow as evenly as possible to the inlet end face 311 of the post-treatment carrier device 31. Then, the exhaust gas flows through the post-treatment carrier 314 of the post-treatment carrier device 31 to purify the exhaust gas. Subsequently, the exhaust gas flows into the second cavity 102 and passes through the connecting pipe 7 into the third cavity 103. Then, the exhaust gas flows into the exhaust pipe 5 through the silencer pipe 42. Preferably, in order to improve noise reduction performance, the exhaust aftertreatment device 100 further includes noise reduction cotton 8 filled in the second exhaust cavity 1032.
[0047] In the embodiment illustrated in this utility model, 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 chamber 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 chamber 1310, and the other end of the annular housing 14 is welded and fixed to the second baffle 32.
[0048] Those skilled in the art will understand 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 face 311 of the post-treatment carrier device 31. In the embodiment illustrated in this utility model, the annular housing 14 does not directly contact the first housing 11 and the second housing 12, thereby effectively keeping the temperature and preventing heat loss.
[0049] Those skilled in the art will understand that the hot and cold ends in related technologies are integrated in the exhaust aftertreatment device 100 of this utility model. The exhaust pipe 5 is a pipe for airflow discharge, therefore the diameter, length, and extension direction of the exhaust pipe 5 can be flexibly adjusted as needed. The exhaust pipe 5 is mounted on the chassis of the vehicle via rubber hangers 51.
[0050] Compared to existing technologies, the exhaust aftertreatment device 100 of this invention includes a housing 1, an exhaust inlet pipe 2, a carrier assembly 3, and a muffler assembly 4. The exhaust inlet pipe 2 is configured to connect to the engine manifold 6, and both the carrier assembly 3 and the muffler assembly 4 are housed within the housing 1. This configuration results in a compact and integrated exhaust aftertreatment device 100 that effectively purifies harmful substances in the exhaust through the carrier assembly 3 and reduces noise through the muffler assembly 4. Furthermore, the housing 1 can be positioned close to the engine, minimizing heat loss during transfer and allowing the aftertreatment carrier 314 to heat up quickly to its operating temperature, reducing pollutant emissions during engine cold starts and simultaneously providing noise reduction. The exhaust aftertreatment device 100 of this invention has a compact structure, occupies little space, effectively utilizes engine compartment space, eliminates the need for a muffler on the chassis, and allows for the placement of more batteries, thereby increasing the vehicle's driving range.
[0051] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. The understanding of this specification should be based on those skilled in the art. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present utility model. All technical solutions and improvements that do not depart from the spirit and scope of the present utility model should be covered within the scope of the claims of the present utility model.
Claims
1. An exhaust aftertreatment device, characterized in that, include: A housing, the housing including an inner cavity and a first baffle located in the inner cavity; An exhaust inlet pipe, the exhaust inlet pipe being fixed to the housing, the exhaust inlet pipe being configured to be connected to the engine manifold; A carrier assembly, comprising a second baffle and a post-treatment carrier device mounted on the second baffle, the post-treatment carrier device including an inlet end face and an outlet end face, the second baffle being spaced apart from the first baffle, the inner cavity including an air intake cavity located between the first baffle and the second baffle, the exhaust inlet pipe being connected to the air intake cavity, and the air intake cavity being in fluid communication with the inlet end face of the post-treatment carrier device; and A noise reduction assembly, which is at least partially located within the housing.
2. The exhaust aftertreatment device as described in claim 1, characterized in that: The first baffle is provided with a first recessed portion, which forms a first airflow cavity. 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 air inlet cavity is in fluid communication with the inlet end face of the post-processing carrier device through the first recessed portion.
3. The exhaust aftertreatment device as described in claim 2, characterized in that: The first recess is integrally stamped from the first baffle, and the first airflow cavity is located on one side of the inlet end face of the post-processing carrier device along the axial direction of the post-processing carrier device.
4. The exhaust aftertreatment device as described in claim 1, characterized in that: The axial direction of the exhaust inlet pipe is perpendicular to the axial direction of the aftertreatment carrier device.
5. The exhaust aftertreatment device as described in claim 2, characterized in that: The carrier assembly includes a third baffle that is spaced apart from the second baffle, and the post-processing carrier device is mounted on the second baffle and the third baffle; The inner cavity includes a first cavity located between the second baffle and the third baffle, a second cavity located on the side of the third baffle away from the first cavity, and a third cavity located on the side of the first baffle away from the second baffle. The outlet end face of the post-processing carrier device is connected to the second cavity.
6. The exhaust aftertreatment device as described in claim 5, characterized in that: The exhaust aftertreatment device also includes a connecting pipe that connects the second chamber and the third chamber.
7. The exhaust aftertreatment device as described in claim 6, characterized in that: The silencing assembly is at least partially located in the third cavity. The silencing assembly includes a fourth baffle and a silencing 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 the side of the fourth baffle away from the first baffle. The fourth baffle is provided with a plurality of connecting holes that connect the first air outlet cavity and the second air outlet cavity.
8. The exhaust aftertreatment device as described in claim 7, characterized in that: The silencer pipe includes a first pipe section passing through the fourth baffle, a second pipe section bent from the first pipe section, and a third pipe section bent from the second pipe section. The first pipe section, the second pipe section, and the third pipe section are generally U-shaped. The first pipe section protrudes into the first air outlet cavity, the second pipe section is located in the second air outlet cavity, and the third pipe section is at least partially located in the first air outlet cavity.
9. The exhaust aftertreatment device as described in claim 8, characterized in that: The first tube section, the second tube section, and the third tube section are each provided with several through holes penetrating the tube wall.
10. The exhaust aftertreatment device as described in claim 8, characterized in that: The silencer pipe also includes a fourth pipe section that is bent from the third pipe section. The fourth pipe section penetrates the housing, and the third pipe section is mounted on the first baffle and the fourth baffle.
11. The exhaust aftertreatment device according to any one of claims 1 to 10, characterized in that: The exhaust inlet pipe is directly connected to the engine manifold, and the exhaust inlet pipe is close to the engine manifold.
12. The exhaust aftertreatment device according to any one of claims 1 to 10, characterized in that: The exhaust aftertreatment device further includes an annular housing fixed between the first baffle and the second baffle, the annular housing at least partially surrounding the outer periphery of the aftertreatment carrier device, and the intake cavity being an annular space located between the annular housing and the aftertreatment carrier device.
13. The exhaust aftertreatment device as described in claim 12, characterized in that: The exhaust inlet pipe is fixed to the annular housing, one end of the annular housing is welded and fixed to the first baffle, and the other end of the annular housing is welded and fixed to the second baffle.