Compact exhaust aftertreatment device

Abstract

A compact exhaust aftertreatment device includes an exhaust aftertreatment assembly and a muffler assembly. The exhaust aftertreatment assembly includes a first housing and a catalytic converter carrier. The muffler assembly includes a second housing, a core assembly, and a long tailpipe connected to the core assembly. The exhaust aftertreatment assembly and the muffler assembly are located close to each other. The compact exhaust aftertreatment device is configured to be installed in the engine compartment of a vehicle, where an engine mount is provided, and the long tailpipe spans the engine mount. The vehicle includes a battery pack, and the long tailpipe has an exhaust outlet located between the engine mount and the battery pack along the longitudinal direction of the vehicle. This configuration allows the compact exhaust aftertreatment device of this invention to save space.

Description

Technical Field

[0001] This utility model relates to a compact exhaust aftertreatment device, belonging to the field of engine exhaust aftertreatment technology. 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: a compact exhaust aftertreatment device, comprising an exhaust aftertreatment assembly and a muffler assembly; the exhaust aftertreatment assembly comprises a first housing and a catalyst carrier encapsulated in the first housing; the muffler assembly comprises a second housing, a core assembly at least partially located in the second housing, and a long tailpipe connected to the core assembly, the core assembly being located downstream of the catalyst carrier along the exhaust gas flow direction, the long tailpipe extending out of the second housing, and the exhaust aftertreatment assembly and the muffler assembly being close to each other; The compact exhaust aftertreatment device is configured to be installed in the engine compartment of a vehicle, the engine compartment having an engine mount, and the long tailpipe spanning the engine mount; the vehicle includes a battery pack, and the long tailpipe has an exhaust end located between the engine mount and the battery pack along the longitudinal direction of the vehicle.

[0007] As a further improvement of the present invention, the exhaust aftertreatment assembly includes an end cone connected to the first housing, the end cone including a conical part and a first mounting tube connected to the conical part and protruding from the conical part; The core assembly includes several baffles and an air intake pipe. The air intake pipe is provided with a second mounting pipe, and the first mounting pipe and the second mounting pipe are welded and fixed together.

[0008] As a further improvement of this utility model, the first mounting tube and the second mounting tube extend in the same direction and are aligned.

[0009] As a further improvement of this utility model, the first mounting tube is inserted into the second mounting tube, or the second mounting tube is inserted into the first mounting tube.

[0010] As a further improvement of the present invention, the exhaust aftertreatment assembly includes an intake housing and a U-shaped connecting housing connected to the intake housing, the U-shaped connecting housing being connected to the first housing; the intake housing and the first housing are located on the same side of the U-shaped connecting housing.

[0011] As a further improvement of the present invention, the second housing includes a first half-housing and a second half-housing welded and fixed together with the first half-housing; the second housing is provided with an inner cavity, and the core assembly is at least partially located in the inner cavity.

[0012] As a further improvement of the present invention, the plurality of baffles includes a first baffle, a second baffle, and a third baffle arranged at intervals; the first baffle, the second baffle, and the third baffle divide the inner cavity into a first cavity located between the first baffle and the second baffle, a second cavity located between the second baffle and the third baffle, a third cavity located on the side of the third baffle away from the first baffle, and a fourth cavity located on the side of the first baffle away from the third baffle; the third baffle is located between the second cavity and the third cavity; the first baffle is located between the fourth cavity and the first cavity.

[0013] As a further improvement of the present invention, the air intake pipe further includes a first extension pipe formed by bending the second mounting pipe, a second extension pipe arranged side by side with the first extension pipe, a U-shaped connecting pipe connecting the first extension pipe and the second extension pipe, and a first bent pipe formed by bending the second extension pipe. The second mounting tube and the first bent tube are both located in the third cavity; the first extension tube and the second extension tube both pass through the first baffle, the second baffle and the third baffle, and are both mounted on the first baffle, the second baffle and the third baffle; the U-shaped connecting tube is located in the fourth cavity.

[0014] As a further improvement of the present invention, the first baffle is provided with a plurality of first through holes connecting the first cavity and the fourth cavity, the second baffle is provided with a plurality of second through holes connecting the first cavity and the second cavity, and the third baffle is provided with a plurality of third through holes connecting the second cavity and the third cavity.

[0015] As a further improvement of the present invention, the long tailpipe includes a first pipe segment and a second pipe segment connected to the first pipe segment; the first pipe segment spans the engine bracket; the first pipe segment includes a first longitudinal portion and a first bent pipe segment formed by bending from the first longitudinal portion; the second pipe segment extends laterally; one end of the second pipe segment is connected to the first bent pipe segment; and the other end of the second pipe segment is the air outlet.

[0016] Compared to existing technologies, the compact exhaust aftertreatment device of this invention includes an exhaust aftertreatment component and a muffler component. The compact exhaust aftertreatment device is configured to be installed in the engine compartment of a vehicle, where an engine mount is located, and the long tailpipe spans the engine mount. The vehicle includes a battery pack, and the long tailpipe has an exhaust outlet located between the engine mount and the battery pack along the longitudinal direction of the vehicle. This configuration allows the compact exhaust aftertreatment device of this invention to save space. Attached Figure Description

[0017] Figure 1 This is a perspective view of one embodiment of the compact exhaust aftertreatment device of this utility model, wherein one side of the housing of the muffler component is removed. Figure 2 This is a perspective view of the compact exhaust aftertreatment device of this utility model from another angle, in which one side of the housing of the muffler component has been removed; Figure 3 This is an exploded perspective view of the compact exhaust aftertreatment device of this utility model; Figure 4 yes Figure 3 Partial exploded 3D diagram; Figure 5 yes Figure 1 A 3D view of some of the exhaust aftertreatment components; Figure 6 yes Figure 4 A 3D view of some of the noise reduction components; Figure 7 This is a perspective view of another embodiment of the compact exhaust aftertreatment device of this utility model; Figure 8 This is a perspective view of another embodiment of the compact exhaust aftertreatment device of this utility model; Figure 9 yes Figure 8 Top view; Figure 10 yes Figure 9 The compact exhaust aftertreatment unit is mounted on the engine mount and is shown in a top view relative to the battery pack. Detailed Implementation

[0018] 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.

[0019] 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.

[0020] Please refer to Figures 1 to 6 As shown, this utility model discloses a compact exhaust aftertreatment device 100, which includes an exhaust aftertreatment assembly 10 and a muffler assembly 20 connected to the exhaust aftertreatment assembly 10.

[0021] The exhaust aftertreatment assembly 10 includes an intake housing 11, a U-shaped connecting housing 12 connected to the intake housing 11, a first housing 13 connected to the U-shaped connecting housing 12, a catalyst carrier 14 encapsulated in the first housing 13, and an end cone 15 connected to the first housing 13.

[0022] In the embodiment illustrated in this utility model, the air intake housing 11 has a double-layer structure, comprising a first air intake housing 111 located in the inner layer and a second air intake housing 112 (e.g., an insulation shell) located in the outer layer. In the embodiment illustrated in this utility model, both the first air intake housing 111 and the second air intake housing 112 are formed by splicing two halves of the housing.

[0023] The intake housing 11 and the first housing 13 are arranged approximately side by side and are both located on the same side (e.g., the lower side) of the U-shaped connecting housing 12.

[0024] The end cone 15 includes a cone portion 151 welded and fixed to the first housing 13 and a first mounting tube 152 connected to and protruding from the cone portion 151.

[0025] In addition, please combine Figure 8As shown, the exhaust aftertreatment assembly 10 may further include an exhaust gas recirculation pipe 16 to recirculate a portion of the exhaust gas treated by the catalyst carrier 14 through the exhaust gas recirculation pipe 16, thereby reducing peak temperature and improving combustion efficiency.

[0026] The noise reduction assembly 20 includes a second housing 21 and a core assembly 22 located within the second housing 21. In the embodiment illustrated in this utility model, the second housing 21 includes a first half-housing 211 and a second half-housing 212 welded and fixed to the first half-housing 211. The second housing 21 has an inner cavity 210, and the core assembly 22 is at least partially located within the inner cavity 210.

[0027] The core assembly 22 includes a plurality of baffles located within the second housing 21 and an air inlet pipe 23 that at least partially passes through the plurality of baffles. In the embodiment illustrated in this utility model, the plurality of baffles includes a first baffle 24, a second baffle 25, and a third baffle 26 spaced apart. The first baffle 24, the second baffle 25, and the third baffle 26 divide the inner cavity 210 into a first cavity 210a located between the first baffle 24 and the second baffle 25, a second cavity 210b located between the second baffle 25 and the third baffle 26, a third cavity 210c located on the side of the third baffle 26 away from the first baffle 24, and a fourth cavity 210d located on the side of the first baffle 24 away from the third baffle 26. The third baffle 26 is located between the second cavity 210b and the third cavity 210c. The first baffle 24 is located between the fourth cavity 210d and the first cavity 210a.

[0028] In the embodiment illustrated in this utility model, the intake pipe 23 includes a second mounting pipe 231, which protrudes from the second housing 21. The first mounting pipe 152 is welded to the second mounting pipe 231. In one embodiment of this utility model, the first mounting pipe 152 and the second mounting pipe 231 extend in the same direction and are aligned. The first mounting pipe 152 is inserted into the second mounting pipe 231. Of course, those skilled in the art will understand that in other embodiments of this utility model, the second mounting pipe 231 can also be inserted into the first mounting pipe 152. After assembly, the exhaust aftertreatment assembly 10 is positioned close to the second housing 21 to save space.

[0029] Specifically, in the embodiment illustrated in this utility model, the air intake pipe 23 further includes a first extension pipe 232 formed by bending the second mounting pipe 231, a second extension pipe 233 arranged side by side with the first extension pipe 232, a U-shaped connecting pipe 234 connecting the first extension pipe 232 and the second extension pipe 233, and a first bent pipe 235 formed by bending the second extension pipe 233.

[0030] In the embodiment illustrated in this utility model, both the second mounting tube 231 and the first bent tube 235 are located in the third cavity 210c. The first extension tube 232 and the second extension tube 233 both pass through the first baffle 24, the second baffle 25, and the third baffle 26, and are both mounted on the first baffle 24, the second baffle 25, and the third baffle 26. The U-shaped connecting tube 234 is located in the fourth cavity 210d.

[0031] In the embodiment illustrated in this utility model, the first baffle 24, the second baffle 25, and the third baffle 26 are all perforated baffles. Specifically, the first baffle 24 is provided with a plurality of first through holes 241 connecting the first cavity 210a and the fourth cavity 210d, the second baffle 25 is provided with a plurality of second through holes 251 connecting the first cavity 210a and the second cavity 210b, and the third baffle 26 is provided with a plurality of third through holes 261 connecting the second cavity 210b and the third cavity 210c.

[0032] Furthermore, the core assembly 22 also includes a connecting pipe 27 mounted on the first baffle 24 and the second baffle 25, connecting the fourth cavity 210d and the second cavity 210b. The connecting pipe 27 also has several through holes 271 penetrating its wall and located in the first cavity 210a. The core assembly 22 also includes an air outlet pipe 28 mounted on the first baffle 24, one end of which is connected to the fourth cavity 210d. The other end of the air outlet pipe 28 extends out of the second housing 21. In addition, to further improve the noise reduction effect, the noise reduction assembly 20 also includes noise-absorbing cotton 29 filled in the first cavity 210a.

[0033] The working principle of the compact exhaust aftertreatment device 100 of this utility model is as follows: Engine exhaust gas flows into the exhaust aftertreatment assembly 10 from the intake pipe 23. The exhaust gas is purified as it flows through the catalyst carrier 14. The purified exhaust gas flows into the muffler assembly 20 from the first mounting pipe 152 and the second mounting pipe 231. The exhaust gas first enters the third chamber 210c along the second mounting pipe 231, the first extension pipe 232, the U-shaped connecting pipe 234, the second extension pipe 233, and the first bent pipe 235. Then, the exhaust gas passes through the third perforation 261 into the second chamber 210b. Then, a portion of the exhaust gas passes through the second perforation 251 into the first chamber 210a, and another portion flows from the connecting pipe into the fourth chamber 210d and the first chamber 210a. At least a portion of the exhaust gas in the first chamber 210a then passes through the first perforation 241 into the fourth chamber 210d. The exhaust gas located in the fourth cavity 210d exits from the exhaust pipe 28.

[0034] The compact exhaust aftertreatment device 100 of this invention is used for installation in the engine compartment of a vehicle. The compact exhaust aftertreatment device 100 of this invention arranges the hot end and cold end in a compact manner, bringing them close to each other, resulting in a compact structure, low heat loss, and the ability to meet both emission requirements and the overall vehicle acoustic performance.

[0035] Please combine Figures 7 to 10 As shown, in other embodiments of the compact exhaust aftertreatment device of this utility model, the muffler assembly 20 further includes a long tailpipe 281 connected to the exhaust pipe 28. Those skilled in the art will understand that the design of the long tailpipe 281 has a positive effect on the acoustics of the exhaust system, effectively reducing exhaust noise.

[0036] Specifically, in one embodiment illustrated in this utility model, the long tail pipe 281 includes a first pipe section 2811 and a second pipe section 2812 connected to the first pipe section 2811. The first pipe section 2811 includes a first longitudinal portion 2811a and a first bent pipe section 2811b formed by bending the first longitudinal portion 2811a. The second pipe section 2812 extends generally laterally, one end of the second pipe section 2812 is connected to the first bent pipe section 2811b, and the other end of the second pipe section 2812 is an outlet end 2812a.

[0037] Please combine Figure 10As shown, when the compact exhaust aftertreatment device 100 is mounted on the engine mount 200, the first pipe section 2811 spans the engine mount 200. The exhaust outlet 2812a is located between the battery pack 300 and the engine mount 200 in the longitudinal direction of the vehicle.

[0038] 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. A compact exhaust aftertreatment device, characterized in that, The device includes an exhaust aftertreatment assembly and a muffler assembly. The exhaust aftertreatment assembly includes a first housing and a catalyst carrier encapsulated in the first housing. The muffler assembly includes a second housing, a core assembly located at least partially in the second housing, and a long tailpipe connected to the core assembly. The core assembly is located downstream of the catalyst carrier along the exhaust gas flow direction, and the long tailpipe extends out of the second housing. The exhaust aftertreatment assembly and the muffler assembly are close to each other. The compact exhaust aftertreatment device is configured to be installed in the engine compartment of a vehicle, the engine compartment having an engine mount, and the long tailpipe spanning the engine mount; the vehicle includes a battery pack, and the long tailpipe has an exhaust end located between the engine mount and the battery pack along the longitudinal direction of the vehicle.

2. The compact exhaust aftertreatment device as described in claim 1, characterized in that: The exhaust aftertreatment assembly includes an end cone connected to the first housing, the end cone including a conical portion and a first mounting tube connected to and protruding from the conical portion; The core assembly includes several baffles and an air intake pipe. The air intake pipe is provided with a second mounting pipe, and the first mounting pipe and the second mounting pipe are welded and fixed together.

3. The compact exhaust aftertreatment device as described in claim 2, characterized in that: The first mounting tube and the second mounting tube extend in the same direction and are aligned.

4. The compact exhaust aftertreatment device as described in claim 3, characterized in that: The first mounting tube is inserted into the second mounting tube, or the second mounting tube is inserted into the first mounting tube.

5. The compact exhaust aftertreatment device as described in claim 1, characterized in that: The exhaust aftertreatment assembly includes an intake housing and a U-shaped connecting housing connected to the intake housing, the U-shaped connecting housing being connected to the first housing; the intake housing and the first housing are located on the same side of the U-shaped connecting housing.

6. The compact exhaust aftertreatment device as described in claim 2, characterized in that: The second housing includes a first half-housing and a second half-housing welded and fixed together with the first half-housing; the second housing has an inner cavity, and the core assembly is at least partially located in the inner cavity.

7. The compact exhaust aftertreatment device as described in claim 6, characterized in that: The plurality of baffles includes a first baffle, a second baffle, and a third baffle arranged at intervals; the first baffle, the second baffle, and the third baffle divide the inner cavity into a first cavity located between the first baffle and the second baffle, a second cavity located between the second baffle and the third baffle, a third cavity located on the side of the third baffle away from the first baffle, and a fourth cavity located on the side of the first baffle away from the third baffle; the third baffle is located between the second cavity and the third cavity; the first baffle is located between the fourth cavity and the first cavity.

8. The compact exhaust aftertreatment device as described in claim 7, characterized in that: The intake pipe also includes a first extension pipe formed by bending the second mounting pipe, a second extension pipe arranged side by side with the first extension pipe, a U-shaped connecting pipe connecting the first extension pipe and the second extension pipe, and a first bent pipe formed by bending the second extension pipe. The second mounting tube and the first bent tube are both located in the third cavity; the first extension tube and the second extension tube both pass through the first baffle, the second baffle and the third baffle, and are both mounted on the first baffle, the second baffle and the third baffle; the U-shaped connecting tube is located in the fourth cavity.

9. The compact exhaust aftertreatment device as described in claim 8, characterized in that: The first baffle is provided with a plurality of first through holes connecting the first cavity and the fourth cavity, the second baffle is provided with a plurality of second through holes connecting the first cavity and the second cavity, and the third baffle is provided with a plurality of third through holes connecting the second cavity and the third cavity.

10. The compact exhaust aftertreatment device according to any one of claims 1 to 9, characterized in that: The long tailpipe includes a first pipe section and a second pipe section connected to the first pipe section; the first pipe section spans the engine bracket; the first pipe section includes a first longitudinal portion and a first bent pipe section formed by bending from the first longitudinal portion; the second pipe section extends laterally; one end of the second pipe section is connected to the first bent pipe section; and the other end of the second pipe section is the air outlet.

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