Shell assembly, post-processing device and vehicle

Abstract

According to the shell assembly, the post-processing device and the vehicle, the interlayer is formed on the side wall of the outer shell, and the reinforcing piece body is arranged in the interlayer, so that the overall rigidity of the outer shell can be improved; in this way, after vibration airflow generated by pressure pulses generated by periodic opening and closing of the engine exhaust valve is introduced into the inner space of the outer shell through the air inlet pipe, the outer shell is less affected by the vibration airflow, and therefore transmission of noise energy is weakened, vibration of the outer shell is further weakened, and the service life of the engine is prolonged. Therefore, the low-frequency resonance area of the whole post-processing device can be reduced, and the noise is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle accessories, and in particular, to a housing assembly, an after-treatment device, and a vehicle. Background Art

[0002] With the gradual implementation of environmental protection measures, there are strict requirements for the performance of newly developed after-treatment products, and higher requirements are also put forward for emission noise.

[0003] Exhaust noise is the main noise source of an automobile, and it is usually 10 - 15 dB(A) higher than other noises. Exhaust noise is mainly generated by the pressure pulses generated by the periodic opening and closing of the engine exhaust valve, which excite the airflow vibration.

[0004] Based on this, an after-treatment device capable of reducing noise is needed. Summary of the Utility Model

[0005] The purpose of the present application is to provide a housing assembly, an after-treatment device, and a vehicle. By forming a sandwich layer on the side wall of the housing body and arranging a reinforcing member in the sandwich layer, the overall rigidity of the housing body can be improved. In this way, after the vibration airflow generated by the pressure pulse generated by the periodic opening and closing of the engine exhaust valve enters the internal space of the housing body through the intake pipe, the housing body is less affected by the vibration airflow, thereby weakening the transmission of noise energy, and then weakening the vibration of the housing body. In this way, the low-frequency resonance region of the entire after-treatment device can be reduced, and the noise can be reduced.

[0006] The embodiments of the present application can be implemented as follows:

[0007] In a first aspect, the present utility model provides a housing assembly, including a housing body and an intake pipe. At least a part of the intake pipe is located in the internal space of the housing body. A sandwich layer is formed on the side wall of the housing body, and there is a reinforcing member in the sandwich layer.

[0008] In an optional embodiment, the housing body includes a first housing and a second housing surrounding the outer peripheral side of the first housing. The sandwich layer is formed between the outer side wall of the first housing and the inner side wall of the second housing. The reinforcing member is connected to both the outer side wall of the first housing and the inner side wall of the second housing. At least a part of the intake pipe is located in the internal space of the first housing.

[0009] In an optional embodiment, there is a circumferentially extending connecting ring on the outer side wall of the first housing. The second housing is connected to the connecting ring. The connecting ring, the inner side wall of the second housing, and the outer side wall of the first housing enclose the sandwich layer.

[0010] In an alternative embodiment, the number of the connecting rings is at least two, and the connecting rings are arranged at intervals along the length direction of the outer housing, and a sandwich layer is formed between two adjacent connecting rings.

[0011] In an alternative embodiment, two ends of the second housing in the length direction are respectively connected to one side of two adjacent connecting rings facing each other.

[0012] In an alternative embodiment, the number of the reinforcing members is at least two, and the reinforcing members are distributed at intervals along the circumferences of the first housing and the second housing.

[0013] In an alternative embodiment, the reinforcing member includes a first rib and a second rib connected at an angle.

[0014] In an alternative embodiment, the first rib and the second rib are connected in a cross shape.

[0015] In a second aspect, the present utility model provides a post-treatment device, including an intake end cover assembly, an exhaust end cover assembly, a DOC carrier assembly, an exhaust tail pipe, and the outer housing assembly according to any one of the foregoing embodiments;

[0016] The intake end cover assembly and the exhaust end cover assembly are respectively connected to two ends of the outer housing in the length direction;

[0017] The DOC carrier assembly is fixed in the internal space of the outer housing. An intake cavity is formed between the DOC carrier assembly and the intake end cover assembly, and an exhaust cavity is formed between the DOC carrier assembly and the exhaust end cover assembly;

[0018] At least a part of the intake pipe is located in the intake cavity, and the exhaust tail pipe penetrates through the exhaust end cover assembly and extends into the exhaust cavity.

[0019] In a third aspect, the present utility model provides a vehicle, including the post-treatment device according to the foregoing embodiment.

[0020] Compared with the prior art, the beneficial effects of the embodiments of the present application include, for example:

[0021] By forming a sandwich layer on the side wall of the outer housing and arranging a reinforcing member in the sandwich layer, the overall rigidity of the outer housing can be improved. In this way, after the vibration airflow generated by the pressure pulse generated by the periodic opening and closing of the engine exhaust valve passes through the intake pipe and enters the internal space of the outer housing, the outer housing is less affected by the vibration airflow, thereby weakening the transmission of noise energy, and further weakening the vibration of the outer housing. In this way, the low-frequency resonance region of the entire post-treatment device can be reduced, and the noise can be reduced. Description of the Drawings

[0022] To more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 Schematic diagram of the post-treatment device in the embodiment of the present application;

[0024] Figure 2 For Figure 1 Internal structure schematic diagram;

[0025] Figure 3 For Figure 1 Schematic diagram of the outer housing in

[0026] Figure 4 For Figure 3 Exploded view;

[0027] Figure 5 For Figure 3 Cross-sectional view;

[0028] Figure 6 For Figure 1 One of the schematic diagrams after hiding the outer housing;

[0029] Figure 7 Figure 1 Another schematic diagram after hiding the outer housing;

[0030] Figure 8 For Figure 1 Schematic diagram of the intake end cap assembly in

[0031] Figure 9 For Figure 1 Schematic diagram of the outlet end cap assembly in

[0032] Icon: 10 - outer housing; 11 - first housing; 12 - second housing; 13 - reinforcing member; 131 - first rib; 132 - second rib; 14 - connecting ring; 15 - interlayer; 16 - intake mounting hole; 20 - intake end cap assembly; 21 - intake end cap; 22 - first perforated plate; 23 - first fixing bracket; 30 - intake pipe; 31 - perforated area; 40 - DOC carrier assembly; 60 - outlet end cap assembly; 61 - outlet end cap; 610 - first mounting hole; 62 - second perforated plate; 620 - second mounting hole; 63 - second fixing bracket; 70 - outlet tail pipe; 71 - perforated pipe structure. Specific embodiments

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. Components of the embodiments of this application usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of this application claimed, but merely represents selected embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without creative efforts belong to the scope of protection of this application.

[0035] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0036] In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0037] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0038] In the description of this application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0039] The following will describe in detail some embodiments of the present application with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0040] Referring to Figure 1 and Figure 2 , an after-treatment device is disclosed in an embodiment of the present application. The after-treatment device is mainly used to be installed on a vehicle and connected in series with the exhaust passage of an engine on the vehicle to purify the exhaust gas.

[0041] The after-treatment device includes an intake end cover assembly 20, an outlet end cover assembly 60, a DOC carrier assembly 40, an outlet tail pipe 70, and a housing assembly;

[0042] The housing assembly mainly functions to provide a fixed installation for the intake end cover assembly 20, the outlet end cover assembly 60, the DOC carrier assembly 40, and the outlet tail pipe 70.

[0043] Combined with Figures 3 to 5 , the housing assembly includes a housing body 10 and an intake pipe 30. The housing body 10 has a hollow structure, which can be a substantially rectangular structure that is hollow and open at both ends in the length direction as shown in the figure. Of course, it can also be a substantially hollow cylindrical structure with both ends open, as long as it can provide installation for the DOC carrier assembly 40, the intake end cover assembly 20, the intake pipe 30, the outlet end cover assembly 60, and the outlet tail pipe 70.

[0044] The intake end cover assembly 20 and the outlet end cover assembly 60 are respectively connected to both ends of the housing body 10 in the length direction;

[0045] The DOC carrier assembly 40 is fixed in the internal space of the housing body 10. An intake chamber is formed between the DOC carrier assembly 40 and the intake end cover assembly 20, and an outlet chamber is formed between the DOC carrier assembly 40 and the outlet end cover assembly 60;

[0046] The intake pipe 30 is at least partially located in the intake chamber, that is, the intake pipe 30 is at least partially located in the internal space of the housing body 10. The intake pipe 30 can be connected to the external engine exhaust pipe, so as to introduce the exhaust gas into the intake chamber, so that the exhaust gas passes through the DOC carrier assembly 40 for treatment and purification.

[0047] The outlet tail pipe 70 passes through the outlet end cover assembly 60 and extends into the outlet chamber, so that the gas purified by the DOC carrier assembly 40 is discharged through the outlet chamber and the outlet tail pipe 70.

[0048] In this embodiment, a sandwich layer 15 is formed on the side wall of the housing body 10, and a reinforcing member 13 is arranged inside the sandwich layer 15.

[0049] In this way, by forming the interlayer 15 on the side wall of the outer housing 10 and arranging the reinforcing member 13 in the interlayer 15, the overall rigidity of the outer housing 10 can be improved. Thus, after the vibration airflow generated by the pressure pulse caused by the periodic opening and closing of the engine exhaust valve passes through the intake pipe 30 into the internal space of the outer housing 10, the outer housing 10 is less affected by the vibration airflow, thereby weakening the transmission of noise energy, and further weakening the vibration of the outer housing 10. In this way, the low-frequency resonance region of the entire aftertreatment device can be reduced and the noise can be lowered.

[0050] The interlayer 15 can be formed in the following way: The outer housing 10 includes a first housing 11 and a second housing 12 surrounding the outer peripheral side of the first housing 11. The interlayer 15 is formed between the outer side wall of the first housing 11 and the inner side wall of the second housing 12. The reinforcing member 13 is connected to both the outer side wall of the first housing 11 and the inner side wall of the second housing 12, which is convenient for manufacturing. In other embodiments, the first housing 11, the second housing 12, and the reinforcing member 13 can also be an integrally formed structure.

[0051] The intake pipe 30 is at least partially located in the internal space of the first housing 11. The DOC carrier assembly 40 is fixed in the internal space of the first housing 11, and the intake end cap assembly 20 and the outlet end cap assembly 60 are respectively connected to both ends of the first housing 11 in the length direction.

[0052] In order to realize the connection between the second housing 12 and the first housing 11 and support the second housing 12 to ensure the formation of the interlayer 15, there is a circumferentially extending connection ring 14 on the outer side wall of the first housing 11. The connection ring 14 and the first housing 11 can be connected by welding, clamping, tenon and mortise, etc. Of course, the connection ring 14 and the first housing 11 can also be directly integrally formed. The second housing 12 is connected to the connection ring 14, and the connection ring 14, the inner side wall of the second housing 12, and the outer side wall of the first housing 11 enclose the interlayer 15.

[0053] In order to better ensure the connection stability between the second housing 12 and the first housing 11, and further improve the overall stiffness of the outer housing 10 to weaken the vibration, the number of the connection rings 14 is at least two, and the connection rings 14 are arranged at intervals along the length direction of the outer housing 10, and the interlayer 15 is formed between two adjacent connection rings 14.

[0054] When specifically connecting the connection ring 14 and the second housing 12, the two ends of the second housing 12 in the length direction can be respectively connected to the opposite sides of two adjacent connection rings 14 that face each other, for example, by using a connection method such as welding to facilitate the connection between the two.

[0055] In this embodiment, an air inlet mounting hole 16 penetrating through is provided on the side wall of the outer housing 10. Therefore, the air inlet mounting hole 16 also penetrates through the side walls of the first housing 11 and the second housing 12. The air inlet pipe 30 is inserted through the air inlet mounting hole 16. In this way, one end of the air inlet pipe 30 is located inside the air inlet cavity, and the other end is located outside the entire outer housing 10 for the exhaust gas to pass through. Of course, in some embodiments, the air inlet pipe 30 can also be entirely located inside the air inlet cavity, and the other end is connected to the air inlet mounting hole 16, and then connecting to an external exhaust gas pipe is also feasible.

[0056] Optionally, the number of the reinforcing members 13 is at least two, and the reinforcing members 13 are distributed at intervals along the circumferences of the first housing 11 and the second housing 12. For example, there are three reinforcing members 13 in this application.

[0057] Of course, in some embodiments, the formation of the sandwich layer 15 can also be directly welding multiple plate bodies adapted to its shape outside the outer housing 10, and a sandwich layer 15 can be formed between the plate bodies and the outer side wall of the outer housing 10.

[0058] Specifically, the reinforcing member 13 includes a first rib 131 and a second rib 132 connected at an angle. For example, the first rib 131 and the second rib 132 can be connected in a cross shape. Thus, the reinforcing member 13 can support the second housing 12 more evenly and ensure the rigidity of the outer housing 10.

[0059] Among them, the number of the first rib 131 and the second rib 132 in each reinforcing member 13 can be one or multiple. Multiple first ribs 131 and multiple second ribs 132 cross each other to form a grid-like structure.

[0060] Of course, in some embodiments, the reinforcing member 13 can also be multiple parallel ribs.

[0061] Combined Figure 2 and Figure 6 as well as Figure 7 , in this embodiment, the end of the air inlet pipe 30 located inside the air inlet cavity is fixedly connected to the inner wall of the first housing 11. The part of the air inlet pipe 30 located inside the air inlet cavity has a porous area 31. In this way, after the vibrating air flow enters the air inlet pipe 30, it can enter the air inlet cavity through the porous area 31. And since the end of the air inlet pipe is fixedly connected to the inner wall of the first housing 11, the vibration phenomenon of the air inlet pipe 30 can be slowed down, further reducing the noise. At the same time, the porous area 31 can play a role in absorbing and buffering the noise energy. In this way, the low-frequency resonance area of the entire post-treatment device can be further reduced, and the noise can be reduced.

[0062] The connection method between the end of the air inlet pipe 30 located inside the air inlet cavity and the inner wall of the first housing 11 is not specifically limited. It can be welded to reduce the vibration of the outer housing 10 and further reduce the generation of noise.

[0063] The porous area 31 on the intake pipe 30 is presented as an arc-shaped curved surface distribution around the central axis of the intake pipe 30. The shape of the radial cross-section of the arc-shaped curved surface is a major arc. Therefore, the central angle of the distribution of the porous area 31 on the intake pipe 30 is greater than 180°, and the edge part of the porous area 31 faces the DOC carrier assembly 40; that is, most of the porous area 31 is close to the intake end cover assembly 20, and a small part is close to the DOC carrier assembly 40. The gas in the intake pipe 30 mainly enters the intake cavity from the area facing the intake end cover assembly 20, reducing the noise energy. Moreover, this can reduce the gas pressure loss and enable the gas to enter the DOC carrier assembly 40 evenly for purification treatment, avoiding affecting the back pressure and treatment uniformity of the aftertreatment device itself.

[0064] In other embodiments, the intake pipe 30 can also be elliptical, cylindrical, etc., and the porous area 31 is arranged on the outer peripheral wall of the intake pipe 30.

[0065] Combined with Figure 8 , the intake end cover assembly 20 includes an intake end cover 21 and a first porous plate 22; the intake end cover 21 is connected to one end of the first housing 11. The middle area of the intake end cover 21 is recessed outward relative to the DOC carrier assembly 40; that is, the middle area of the intake end cover 21 is recessed in the direction away from the DOC carrier assembly 40; the first porous plate 22 is connected to the side of the edge area of the intake end cover 21 facing the DOC carrier assembly 40. In this way, the intake end cover 21 closes one end of the first housing 11, and an intake cavity is formed between the intake end cover 21 and the DOC carrier assembly 40. At the same time, setting the first porous plate 22 can absorb the noise energy and further reduce the generation of noise.

[0066] Among them, the intake end cover assembly 20 further includes at least one first fixing bracket 23 connected between the middle area of the intake end cover 21 and the middle area of the first porous plate 22. For example, it can be the four first fixing brackets 23 shown in the figure. This can improve the connection reliability between the intake end cover 21 and the first porous plate 22 and prevent the first porous plate 22 from vibrating.

[0067] Combined with Figure 9, the outlet end cover assembly 60 includes an outlet end cover 61 and a second perforated plate 62; the outlet end cover 61 is connected to the other end of the first housing 11, and the middle region of the outlet end cover 61 is recessed outward relative to the DOC carrier assembly 40, that is, the middle region of the inlet and outlet end cover 61 is recessed in a direction away from the DOC carrier assembly 40; the second perforated plate 62 is connected to the side of the edge region of the outlet end cover 61 facing the DOC carrier assembly 40; the outlet tail pipe 70 passes through the outlet end cover 61 and the second perforated plate 62 to extend into the outlet cavity, ensuring that the processed gas can be normally discharged from the outlet tail pipe 70. In this way, the other end of the first housing 11 is closed by the outlet end cover 61, and an outlet cavity is formed between the outlet end cover 61 and the DOC carrier assembly 40. At the same time, the second perforated plate 62 is provided to absorb the noise energy transmitted to the rear end and further reduce the generation of noise.

[0068] Wherein, the outlet end cover assembly 60 further includes at least one second fixing bracket 63 connected between the middle region of the outlet end cover 61 and the middle region of the second perforated plate 62. For example, it can be the three second fixing brackets 63 shown in the figure. This can improve the connection reliability between the outlet end cover 61 and the first perforated plate 22 and prevent the second perforated plate 62 from vibrating.

[0069] Of course, in order to facilitate the outlet tail pipe 70 to pass through the outlet end cover 61 and the second perforated plate 62, the outlet end cover 61 is provided with a first mounting hole 610, and the corresponding second perforated plate 62 is provided with a second mounting hole 620. The first mounting hole 610 and the second mounting hole 620 are coaxially arranged, and the outlet tail pipe 70 passes through the first mounting hole 610 and the second mounting hole 620 and is sealed. For example, the connection and sealing can be achieved by welding, or it can be sealed by a sealing ring.

[0070] It should also be noted that the part of the outlet tail pipe 70 located inside the first housing 11 is a porous pipe structure 71, that is, a plurality of openings are formed in the part of the outlet tail pipe 70 located in the outlet cavity, so as to facilitate the smooth flow of the air flow, reduce the overall back pressure of the post-treatment device, and also reduce the generation of noise.

[0071] It should be noted that in the exhaust gas treatment technology, the "DOC carrier" specifically refers to the carrier used in the Diesel Oxidation Catalyst. DOC is the abbreviation of Diesel Oxidation Catalyst, which is used to reduce harmful emissions. Its working principle is to use a catalyst to accelerate the oxidation reaction of carbon monoxide (CO), hydrocarbons (HC), and some particulate matter in the exhaust gas, converting them into harmless carbon dioxide (CO2), water (H2O), and other substances. At the same time, DOC can also convert some nitrogen oxides (NO) into nitrogen dioxide (NO2), providing more suitable reaction conditions for subsequent emission reduction technologies (such as selective catalytic reduction (SCR) systems) and improving the overall exhaust gas treatment efficiency. The DOC carrier assembly 40 can be made of metal or ceramic materials, which have a high specific surface area and good thermal stability to ensure that the catalyst can effectively contact the exhaust gas and withstand the high-temperature gas discharged from the engine. Ceramic carriers are widely used in DOC systems due to their high temperature resistance, high mechanical strength, and good chemical stability. These carriers are coated with noble metals (such as platinum, palladium) or base metal catalysts to promote the occurrence of oxidation reactions.

[0072] In addition, the embodiments of the present application also disclose a vehicle, which includes the after-treatment device of the above embodiments.

[0073] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A housing assembly, characterized in that: The invention comprises an outer shell (10) and an air intake pipe (30), wherein the air intake pipe (30) is at least partially located in the internal space of the outer shell (10), a side wall of the outer shell (10) is formed with an interlayer (15), and a reinforcing member (13) is provided inside the interlayer (15).

2. The housing assembly according to claim 1, characterized in that The outer shell (10) comprises a first shell (11) and a second shell (12) surrounding the outer peripheral side of the first shell (11); the interlayer (15) is formed between the outer side wall of the first shell (11) and the inner side wall of the second shell (12); the reinforcement (13) is connected to the outer side wall of the first shell (11) and the inner side wall of the second shell (12); and the air intake pipe (30) is at least partially located in the internal space of the first shell (11).

3. The housing assembly according to claim 2, characterized in that A connecting ring (14) extending in a circumferential direction is provided on the outer side wall of the first shell (11); the second shell (12) is connected to the connecting ring (14); the connecting ring (14), the inner side wall of the second shell (12) and the outer side wall of the first shell (11) form the interlayer (15).

4. The housing assembly according to claim 3, characterized in that: The number of the connecting rings (14) is at least two, and the connecting rings (14) are arranged at intervals along the length direction of the outer shell (10), and the interlayer (15) is formed between two adjacent connecting rings (14).

5. The housing assembly according to claim 4, characterized in that: Both ends of the second shell (12) in the length direction are respectively connected to opposite sides of two adjacent connecting rings (14).

6. The housing assembly according to claim 2, characterized in that The number of the reinforcement members (13) is at least two, and the reinforcement members (13) are distributed at intervals along the circumference of the first shell (11) and the second shell (12).

7. The housing assembly according to claim 1, wherein: The reinforcing member (13) comprises a first rib (131) and a second rib (132) connected at an angle.

8. The housing assembly according to claim 7, characterized in that The first ribs (131) and the second ribs (132) are connected in a cross shape.

9. A post-processing device, characterized in that: It comprises an air inlet cover assembly (20), an air outlet cover assembly (60), a DOC carrier assembly (40), an air outlet tail pipe (70), and a housing assembly according to any one of claims 1 to 8; The air inlet cover assembly (20) and the air outlet cover assembly (60) are respectively connected to two ends of the outer shell (10) in the length direction; The DOC carrier assembly (40) is fixed in the internal space of the outer shell (10), an air inlet cavity is formed between the DOC carrier assembly (40) and the air inlet end cover assembly (20), and an air outlet cavity is formed between the DOC carrier assembly (40) and the air outlet end cover assembly (60); The air inlet pipe (30) is at least partially located in the air inlet cavity, and the air outlet tail pipe (70) is arranged through the air outlet end cover assembly (60) and extends into the air outlet cavity.

10. A vehicle, characterized in that: Includes the post-processing device as described in claim 9.

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