Post-processing device, post-processing assembly and automobile

Abstract

The utility model discloses an aftertreatment device, an assembly and an automobile, and relates to the technical field of automobile exhaust. The post-treatment device comprises a box body, the interior of the box body is a cavity, and an air inlet and an air outlet are formed in the surface of the box body; the air inlet is formed in the top surface of the box body; the exhaust ports comprise an inner exhaust port formed in the inner side wall of the box body, an outer exhaust port formed in the outer side wall of the box body and an upper exhaust port formed in the top surface of the box body, and the air inlet is communicated with the exhaust ports through a cavity in the box body; each exhaust port can be detachably connected with a matched sealing device through a spline; the sealing device comprises a resonant cavity. The post-processing assembly comprises the post-processing device and further comprises a post-processing support assembly. According to the utility model, the exhaust direction can be adjusted to adapt to different working modes; noise of different frequencies can be reduced; the problems that in the prior art, universality is poor, the structure is complex, and the silencing and noise reduction effect is insufficient are solved.

Description

Technical Field

[0001] This utility model relates to the field of automotive exhaust technology, and in particular to an aftertreatment device, assembly, and automobile. Background Technology

[0002] Currently, automotive aftertreatment systems or mufflers have various exhaust orientation requirements, especially in some cold-climate countries where exhaust methods differ with the seasons; for example, exhaust is used to heat the dump truck bed in winter, while in summer, exhaust is directly released into the atmosphere. Furthermore, different countries and vehicles used for different purposes have different requirements for exhaust orientation. Some tractor-trailers, due to chassis structure limitations, require exhaust pipes to face upwards or inwards to avoid exhaust fumes interfering with equipment or personnel operating behind them. Vehicles used in urban environments need to use downward-facing or inward-facing exhaust outlets to reduce exhaust dust and minimize the direct harm of harmful gases (such as carbon monoxide) to pedestrians. Large trucks have inward-facing exhaust outlets to prevent hot exhaust fumes or unburned fuel-water mixtures from splashing onto pedestrians, while also reducing the safety hazards caused by detonation (such as "backfiring"). However, most current aftertreatment systems are single-exhaust-port structures, resulting in poor versatility. Some existing aftertreatment devices add a three-way valve in the middle of the exhaust outlet to change the exhaust orientation, but this structure is complex and occupies a large amount of space.

[0003] CN219711638U discloses an adjustable exhaust pipe for automobiles, including an exhaust pipe body. One end of the exhaust pipe body is provided with a snap-fit ​​mechanism, and the other end is provided with an adjustable exhaust mechanism. The snap-fit ​​mechanism includes a snap-fit ​​seat and a connecting block. The snap-fit ​​seat is fixedly connected to the exhaust port of the automobile engine, and the connecting block is fixedly connected to one end of the exhaust pipe body. A connecting cavity is formed in the middle of the snap-fit ​​seat, and the connecting cavity is sleeved with the connecting block. Snap holes are formed on both sides of the connecting block, and limit grooves are formed at both ends of the snap-fit ​​seat. A movable plate is movably sleeved within the inner cavity of the limit groove. A locking rod is fixedly connected to one side of the movable plate, and one end of the locking rod extends into the connecting cavity and snaps with the snap hole. The adjustable exhaust mechanism includes a turntable rotatably connected to one end of the exhaust pipe body. The turntable is in communication with the exhaust pipe body, and a limit plate is fixedly connected to the side of the turntable. Bolts are threaded onto the surface of the limit plate. However, the existing technology involves setting a rotatable connector at the end of the exhaust pipe to achieve different orientations, which is complex and takes up a lot of space.

[0004] CN205559034U discloses a bidirectional exhaust device, including a muffler with an exhaust gas inlet, a side exhaust port, and an upper exhaust port. The muffler also has an upper exhaust pipe and a side exhaust pipe, with detachable sealing plates installed at their outlet ends. The muffler includes a retractable connecting device fitted onto the upper exhaust pipe for sealing connection with the cargo box floor. However, this prior art has drawbacks, including the exhaust port not being able to face inwards, exhaust gas only being used to heat the upper cargo box in winter and not other parts such as the fuel tank, and unsatisfactory noise reduction effect. Utility Model Content

[0005] The purpose of this utility model is to provide an aftertreatment device, assembly, and automobile. The aftertreatment device has multiple exhaust outlets, which can realize the adjustment of exhaust direction to adapt to different working modes; it can reduce noise for different frequencies; and it solves the problems of poor versatility, complex structure, and insufficient noise reduction effect of the prior art.

[0006] This utility model provides the following solution.

[0007] A post-processing device includes a housing with an internal cavity. The housing has an air inlet and an exhaust outlet on its surface. The air inlet is located on the top surface of the housing. The exhaust outlets include an internal exhaust outlet on the inner wall of the housing, an external exhaust outlet on the outer wall of the housing, and an upper exhaust outlet on the top surface of the housing. The air inlet and each exhaust outlet are interconnected through the internal cavity of the housing. Each exhaust outlet can be detachably connected to a matching sealing device via a spline. The sealing device includes a resonant cavity.

[0008] Furthermore, the sealing device includes a cover, the bottom surface of which is fixedly connected to a resonant cavity. The resonant cavity can be inserted into the box through an exhaust port. The bottom edge of the cover is provided with a rotary spline, and the exhaust port is provided with a fixed spline that matches the rotary spline. The fixed spline and the rotary spline can cooperate to lock the cover and the exhaust port together.

[0009] During connection, simply insert the rotating spline into the notch of the fixed spline and then rotate the cover to make the rotating spline snap onto the fixed spline. Compared with the connection method of flange bolts, it is more convenient, faster, saves time and effort, and improves work efficiency.

[0010] Furthermore, the exhaust port also includes a rear exhaust port, which is disposed on the rear side wall of the housing and communicates with the cavity inside the housing.

[0011] The rear exhaust port further enhances the versatility of the aftertreatment device. The rear exhaust port facilitates the connection of aftertreatment components such as urea injection devices. For example, the urea pump, nozzle, and urea tank of the SCR system require regular maintenance, and the rearward design simplifies the maintenance process of the pipeline interface. In winter, the urea pump can also be heated through pipeline connection to prevent urea from crystallizing at low temperatures, ensuring the fluidity of liquid urea, enabling the exhaust gas to be reused, and saving energy.

[0012] Furthermore, the resonant cavity has a cylindrical structure, and multiple circular perforations are arranged in a matrix along the circumferential and longitudinal directions on the cylindrical wall of the resonant cavity.

[0013] The resonant cavity can reduce noise. Under different operating conditions, the noise frequency generated by the vehicle engine is also different. Resonant cavities with different hole spacing and hole diameter specifications can be selected for customized installation for different noise frequencies.

[0014] Furthermore, the resonant cavity includes an outer cylinder, and an inner cylinder is internally threaded to the outer cylinder. Both the outer cylinder and the inner cylinder are cylindrical in shape. The outer cylinder has multiple circular perforations on its wall, and the inner cylinder has multiple strip-shaped holes on its wall.

[0015] By rotating the inner cylinder, the strip hole and the circular perforation of the outer cylinder can be fully, partially, or not connected, thereby adjusting the size of the hole diameter to reduce noise at different frequencies. This reduces the number of resonant cavity specifications and frequency replacements, saving processing and resource costs.

[0016] Furthermore, the plurality of circular perforations are arranged in a matrix uniformly along the circumference and length of the outer cylinder, and the strip holes are uniformly arranged along the circumference of the inner cylinder. The number of strip holes is the same as the number of columns of the circular perforations arranged along the circumference of the outer cylinder.

[0017] This arrangement allows for consistent aperture sizes, thus enabling noise reduction within the same frequency range.

[0018] A post-processing assembly includes the post-processing device as described above, and also includes a post-processing support assembly.

[0019] Furthermore, the post-processing support assembly includes two identical supports, each of which is approximately L-shaped. One end of the support is detachably connected to a bracket, and the connecting end of the bracket is a square tube structure. The connecting end of the support can be inserted into the square tube structure and fixedly connected by bolts. The middle and rear ends of the bracket are respectively connected to a hoop, and the hoop can be detachably sleeved on the outside of the post-processing device.

[0020] The connecting end of the support can be inserted into the square tube and then tightened with bolts. Its advantage is that it is easy to install. It can be installed first and then tightened, instead of aligning and tightening at the same time, which reduces the assembly time. The post-processing device is fixed with a hoop, which is convenient for disassembly and assembly.

[0021] Furthermore, the portion of the band located on the front and rear sides of the post-processing device is respectively welded with a protective plate connector, and one of the protective plate connectors is detachably connected to a protective plate.

[0022] The protective plate is installed on the strap near the wheel to prevent foreign objects such as stones kicked up by the wheel during driving from hitting the front or rear side wall of the aftertreatment device and causing damage.

[0023] An automobile includes body longitudinal beams and the aforementioned aftertreatment assembly, the aftertreatment assembly being bolted to the body longitudinal beams. It possesses all the advantages of the aforementioned aftertreatment device and aftertreatment assembly.

[0024] This utility model has the following advantages compared with the prior art:

[0025] 1. The aftertreatment device provided by this utility model has multiple exhaust outlets, and the exhaust direction can be adjusted without additional adjustment mechanism. The exhaust direction can be switched by opening and closing different exhaust ports. It can be applied to the needs of vehicles of different countries and different purposes, realizing the universality of aftertreatment devices. The pipeline is simple and the overall cost is low. The sealing device is equipped with a resonant cavity for noise reduction. The resonant cavity can be disassembled and installed with the sealing device via splines, which is convenient and quick. Resonant cavities with different hole spacing specifications can be selected for customized installation for different frequencies of noise.

[0026] 2. The post-processing assembly provided by this utility model includes a post-processing bracket assembly and a protective plate, which facilitates the installation of the post-processing device and also protects the post-processing device. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Appendix Figure 1 This is a schematic diagram of the post-processing device described in this utility model;

[0029] Appendix Figure 2 This is a schematic diagram of the planar structure of the post-processing device described in this utility model;

[0030] Appendix Figure 3 This is a schematic diagram of the sealing device described in this utility model;

[0031] Appendix Figure 4 This is a schematic diagram of the post-processing assembly described in this utility model;

[0032] Appendix Figure 5 This is a schematic diagram of the installation of the protective plate described in this utility model;

[0033] Appendix Figure 6 This is a schematic diagram of the post-processing device described in Embodiment 2 of this utility model;

[0034] Appendix Figure 7 This is a schematic diagram of the resonant cavity described in Embodiment 3 of this utility model;

[0035] Appendix Figure 8 This is a schematic diagram showing the connection between the aftertreatment assembly and the vehicle body longitudinal beam described in this utility model.

[0036] In the picture:

[0037] 1. Housing; 2. Air inlet; 3. Exhaust outlet; 30. Fixed spline; 31. Internal exhaust outlet; 32. External exhaust outlet; 33. Upper exhaust outlet; 34. Rear exhaust outlet; 4. Sealing device; 41. Cover; 411. Rotary spline; 42. Resonant cavity; 421. Outer cylinder; 4210. Circular perforation; 422. Inner cylinder; 4220. Strip hole; 43. Sealing ring; 5. Aftertreatment bracket assembly; 51. Support; 52. Bracket; 53. Hoop; 531. Protective plate connector; 6. Protective plate; 7. Vehicle body longitudinal beam. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the application. The singular forms “a,” “said,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0040] It should be understood that the term "and / or" used in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0041] It should be understood that although the terms first, second, third, etc., may be used in the embodiments of this application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, first may also be referred to as second without departing from the scope of the embodiments of this application, and similarly, second may also be referred to as first.

[0042] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0043] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0044] It should be noted that any symbols and / or numbers present in the specification that are not marked in the accompanying drawings are not reference numerals.

[0045] Example 1, please refer to Figure 1 and Figure 2 As shown, this embodiment provides an after-treatment device, including a housing 1. The housing 1 has a rounded cuboid structure and an internal cavity. The side of the housing 1 closest to the vehicle body is the inner side, and the side of the housing 1 furthest from the vehicle body is the outer side. An internal exhaust port 31 is provided on the inner side wall of the housing 1, and an external exhaust port 32 is provided on the outer side wall of the housing 1. An air inlet 2 and an upper exhaust port 33 are provided on the top surface of the housing 1. The three exhaust ports 3 are interconnected with the air inlet 2 through the internal cavity of the housing. Each exhaust port 3 is detachably connected to a matching sealing device 4. A sound-absorbing structure can be further provided in the internal cavity of the housing.

[0046] Specifically, please refer to Figure 3 As shown, the sealing device 4 includes a cover 41, and a resonant cavity 42 is fixedly connected to the bottom surface of the cover 41. The resonant cavity 42 can be inserted into the housing 1 through the exhaust port 3. A rotating spline 411 is provided on the bottom edge of the cover 41, and a fixed spline 30 matching the rotating spline 411 is provided on the flange of the exhaust port 3. When connecting, simply insert the rotating spline 411 into the notch of the fixed spline 30 and rotate the cover 41 to make the rotating spline 411 snap onto the fixed spline 30. Compared with the connection method of flange bolts, it is convenient, quick, time-saving, labor-saving and improves work efficiency. A sealing ring 43 is provided between the cover 41 and the flange of the exhaust port 3 to ensure that the exhaust port 3 is sealed and does not leak air.

[0047] The resonant cavity 42 is a cylindrical structure with multiple circular perforations 4210 arranged in a matrix along the circumferential and longitudinal directions on the cylindrical wall, which can achieve the effect of noise reduction. Under different operating conditions, the noise frequency generated by the vehicle engine is also different. The resonant cavity 42 and the cover 41 are easy to disassemble and assemble together. Resonant cavities 42 with different hole spacing and hole diameter specifications can be selected for customized installation for different noise frequencies.

[0048] When in use, connect the intake pipe to the intake port 2. Then, according to the needs of different countries and different working conditions, connect the exhaust pipe to one of the exhaust ports 3. Seal the other exhaust ports 3 with the sealing device 4 to achieve exhaust in different directions. Alternatively, in cold conditions, one of the exhaust ports 3 can be sealed, and the other two exhaust ports 3 can use the exhaust temperature to heat certain parts of the vehicle to achieve secondary utilization of exhaust gas, which is energy-saving and environmentally friendly.

[0049] Specifically, only the external exhaust port 32 is opened while the other exhaust ports 3 are closed, allowing exhaust to be discharged to the outside. This can be applied to certain applications that prevent exhaust gas from flowing back or polluting the work area, such as vehicles used in mine tunnels or cold chain transport vehicles. It can also be applied to areas with high water wading depths to prevent water from entering and causing the engine to stall when wading. In extremely cold regions, it can prevent snow from covering the exhaust ports 3 and reduce the risk of exhaust gas flowing back into the cab during cold starts.

[0050] By opening only the internal exhaust port 31 and closing the other exhaust ports 3, exhaust can be directed inwards. This is mainly used in some tractor vehicles where the chassis structure limits the exhaust pipe to face upwards or inwards to avoid exhaust fumes interfering with the operation of equipment or personnel behind. It is also used in urban environments in countries and regions with high environmental protection requirements, where downward-facing or inward-facing exhaust ports 3 are required, which can reduce exhaust dust and reduce the direct harm of harmful gases (such as carbon monoxide) to pedestrians. When the exhaust port 3 of a large truck faces inwards, it can prevent high-temperature exhaust fumes or unburned oil-water mixtures from splashing onto pedestrians, while reducing the safety hazards caused by deflagration (such as "backfiring"). It can also reduce the risk of water entering the exhaust pipe when wading through water and reduce noise.

[0051] In cold winter, opening the upper exhaust port 33 and using a pipe to guide the exhaust gas to the upper cargo box for heating can prevent the cargo inside the cargo box from being damaged due to low temperature; at the same time, the inner exhaust port 31 can be opened and the exhaust gas can be guided to the fuel tank for heating through a duct to prevent the vehicle from stalling due to excessively low temperature.

[0052] Please see Figure 4 and Figure 5 As shown, this embodiment also provides a post-processing assembly, including the above-mentioned post-processing device, and further including a post-processing bracket assembly 5. The post-processing bracket assembly 5 includes two supports 51, each support 51 being approximately L-shaped. One end of each support 51 is detachably connected to a bracket 52. The connecting end of the bracket 52 is a square tube structure, and the connecting end of the support 51 can be inserted into the square tube and then tightened with bolts. Its advantage is that it is easy to install and uninstall, as it can be installed first and then tightened, rather than being aligned and tightened at the same time, reducing assembly time; the middle and rear of the bracket 52 Each end is connected to a hoop 53, which can be detachably sleeved on the outside of the aftertreatment device to fix the aftertreatment device to the bracket 52; protective plate connectors 531 are welded to the hoop 53 on the front and rear sides of the aftertreatment device, which can be detachably connected to the protective plate 6 by bolts; depending on the position of the aftertreatment device on the vehicle body, the protective plate 6 is installed on the hoop 53 near the wheel to prevent stones and other foreign objects kicked up by the wheel during driving from hitting the front or rear side wall of the aftertreatment device and causing damage.

[0053] Please see Figure 8 As shown, this embodiment also provides an automobile, including the above-mentioned aftertreatment assembly, and also including a body longitudinal beam 7, with the vertical arms of two supports 51 bolted to the body longitudinal beam 7; the automobile has all the advantages of the above-mentioned aftertreatment device and aftertreatment assembly.

[0054] Example 2, please refer to Figure 6 As shown, this embodiment provides an after-treatment device, which further increases the number of exhaust ports 3 based on embodiment 1, thereby further enhancing the versatility of the after-treatment device.

[0055] Specifically, an internal exhaust port 31 is provided on the inner side wall of the housing 1, an external exhaust port 32 is provided on the outer side wall of the housing 1, an air inlet 2 and an upper exhaust port 33 are provided on the top surface of the housing 1, and a rear exhaust port 34 is provided on the rear side wall of the housing 1. The four exhaust ports 3 and the air inlet 2 are interconnected through the cavity inside the housing, and each exhaust port 3 is detachably connected to a matching sealing device 4.

[0056] The rear-mounted exhaust port facilitates connection to aftertreatment components such as urea injection devices. For example, the urea pump, nozzle, and urea tank of the SCR system require regular maintenance, and the rearward design simplifies the maintenance process of the pipeline interface. In winter, the urea pump can also be heated through pipeline connection to prevent urea from crystallizing at low temperatures, ensuring the fluidity of liquid urea, enabling the exhaust gas to be reused, and saving energy.

[0057] Example 3, please refer to Figure 7 As shown, this embodiment provides a post-processing device, which improves the structure of the resonant cavity 42 based on embodiment 1 or 2.

[0058] Specifically, the resonant cavity 42 includes an outer cylinder 421, which has a cylindrical structure. Multiple circular perforations 4210 are evenly arranged in a matrix along the circumferential and longitudinal directions on the cylinder wall. One end of the outer cylinder 421 has an internal thread. The inner cylinder 422 is connected to the inner cylinder 421 by the internal thread. The inner cylinder 422 has strip holes 4220 evenly arranged along the circumferential direction on the cylinder wall. The number of strip holes 4220 is the same as the number of rows of circular perforations 4210 arranged along the circumferential direction on the outer cylinder 421.

[0059] By rotating the inner cylinder 422, the strip hole 4220 can be fully connected, partially connected, or disconnected from the circular perforation 4210 of the outer cylinder 421, thereby adjusting the size of the hole diameter to reduce noise at different frequencies. This reduces the number of specifications of the resonant cavity 42 and the frequency replacement, saving processing and resource costs.

[0060] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A post-processing apparatus, characterized in that, The enclosure includes a housing (1), the interior of which is a cavity, and an air inlet (2) and an exhaust outlet (3) are provided on the surface of the housing (1). The air inlet (2) is located on the top surface of the housing (1). The exhaust outlet (3) includes an inner exhaust outlet (31) located on the inner side wall of the housing (1), an outer exhaust outlet (32) located on the outer side wall of the housing (1), and an upper exhaust outlet (33) located on the top surface of the housing (1). The air inlet (2) and each exhaust outlet (3) are interconnected through the cavity inside the housing (1). Each exhaust outlet (3) can be detachably connected to a matching sealing device (4) via a spline. The sealing device (4) includes a resonant cavity (42).

2. The post-processing apparatus according to claim 1, characterized in that, The sealing device (4) includes a cover (41), and a resonant cavity (42) is fixedly connected to the bottom surface of the cover (41). The resonant cavity (42) can be inserted into the box (1) through the exhaust port (3). The bottom edge of the cover (41) is provided with a rotary spline (411). The exhaust port (3) is provided with a fixed spline (30) that matches the rotary spline (411). The fixed spline (30) and the rotary spline (411) can cooperate to lock the cover (41) and the exhaust port (3).

3. The post-processing apparatus according to claim 2, characterized in that, The exhaust port (3) also includes a rear exhaust port (34), which is located on the rear side wall of the box (1) and communicates with the cavity inside the box (1).

4. The post-processing apparatus according to claim 1, characterized in that, The resonant cavity (42) is a cylindrical structure, and multiple circular perforations (4210) are arranged in a matrix along the circumferential and longitudinal directions on the cylindrical wall of the resonant cavity (42).

5. The post-processing apparatus according to claim 1, characterized in that, The resonant cavity (42) includes an outer cylinder (421), and an inner cylinder (422) is threadedly connected to the inner cylinder (421). Both the outer cylinder (421) and the inner cylinder (422) are cylindrical structures. The outer cylinder (421) has multiple circular perforations (4210) on its wall, and the inner cylinder (422) has multiple strip holes (4220) on its wall.

6. The post-processing apparatus according to claim 5, characterized in that, The plurality of circular perforations (4210) are arranged in a matrix uniformly along the circumference and length of the outer cylinder (421), and the strip holes (4220) are uniformly arranged along the circumference of the inner cylinder (422). The number of strip holes (4220) is the same as the number of columns of circular perforations (4210) arranged along the circumference of the outer cylinder (421).

7. An after-treatment assembly, characterized in that, The device includes the post-processing apparatus as described in any one of claims 1-6, and further includes the post-processing support assembly (5).

8. The post-processing assembly according to claim 7, characterized in that, The post-processing support assembly (5) includes two identical supports (51), each of which is approximately L-shaped. One end of the support (51) is detachably connected to a bracket (52). The connecting end of the bracket (52) is a square tube structure. The connecting end of the support (51) can be inserted into the square tube structure and fixedly connected by bolts. The middle and rear ends of the bracket (52) are respectively connected to a hoop (53), which can be detachably sleeved on the outside of the post-processing device.

9. The post-processing assembly according to claim 8, characterized in that, The band (53) is welded with protective plate connectors (531) on the front and rear sides of the post-processing device, and one of the protective plate connectors (531) is detachably connected to a protective plate (6).

10. An automobile, comprising a body longitudinal beam (7), characterized in that, It also includes the aftertreatment assembly as described in claim 8, which is bolted to the vehicle body longitudinal beam (7).

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