Power assembly and vehicle

Abstract

The utility model relates to a power assembly and a vehicle. The power assembly comprises an engine; the silencing device is connected to the engine, the silencing device comprises a silencer and a catalytic converter, the silencer is suitable for conducting silencing treatment on gas exhausted by the engine, and the catalytic converter is suitable for conducting catalytic treatment on the gas exhausted by the engine; wherein at least one of the silencer and the catalytic converter is installed on one side of the engine.

Description

Technical Field

[0001] This application relates to the field of engine exhaust technology, and more particularly to powertrains and vehicles. Background Technology

[0002] Range-extended hybrid vehicles have a problem with loud engine noise. Related technologies use mufflers to improve engine noise, but the space for mufflers is extremely limited, the exhaust pipes for mufflers are complicated to install, and they occupy the space for the battery pack on the vehicle's floor, thus affecting the pure electric range of the hybrid vehicle. Utility Model Content

[0003] This application provides a powertrain and vehicle to at least partially solve the above-mentioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, a powertrain is provided, comprising: an engine; and a muffler connected to the engine; the muffler comprising a muffler and a catalytic converter, the muffler being adapted to muffle gases discharged from the engine, and the catalytic converter being adapted to catalytically treat the gases discharged from the engine; wherein at least one of the muffler and the catalytic converter is mounted on one side of the engine.

[0005] Optionally, the catalyst and the muffler are located on the same side of the engine.

[0006] Optionally, the engine has a left side and a right side opposite each other in the width direction of the vehicle, the same side being the left side or the right side; or, the engine has a front side and a rear side opposite each other in the length direction of the vehicle, the same side being the front side or the rear side; or, the engine has an upper side and a lower side opposite each other in the height direction of the vehicle, the same side being the upper side or the lower side.

[0007] Optionally, the catalyst and the muffler are respectively disposed on a first side and a second side of the engine, with the first side and the second side being adjacent to each other.

[0008] Optionally, the engine has a left and a right side opposite to each other in the width direction of the vehicle, a front and a rear side opposite to each other in the length direction of the vehicle, and an upper and a lower side opposite to each other in the height direction of the vehicle; wherein the first side and the second side are two adjacent sides among the left side, the right side, the front side, the rear side, the upper side and the lower side.

[0009] Optionally, the powertrain is adapted for a vehicle, and the catalytic converter is located on one side of the muffler in the height direction of the vehicle.

[0010] Optionally, the engine has an exhaust port, wherein the muffler and the exhaust port are located on the same side of the engine.

[0011] Optionally, the powertrain is used in a vehicle, wherein the engine and the muffler are adapted to be located in the front or rear compartment of the vehicle.

[0012] Optionally, the muffler has a top and a bottom disposed opposite each other in the height direction of the vehicle, and the muffler is provided with an air outlet; wherein the catalyst is disposed at the top and the air outlet is disposed at the bottom.

[0013] Optionally, the muffler has a front side and a rear side disposed opposite to each other in the length direction of the vehicle, and a top side and a bottom side disposed opposite to each other in the height direction of the vehicle; wherein the muffler is provided with an air outlet extending in a direction from the front side to the rear side and from the top side to the bottom side.

[0014] Optionally, the angle between the axis of the air outlet and the direction from the front side to the rear side is set to be greater than 45°.

[0015] Optionally, the muffler has a top and a bottom disposed opposite each other in the height direction of the vehicle; wherein the bottom of the muffler is provided with a first notch, and the air outlet is disposed within the first notch.

[0016] Optionally, the powertrain includes a steering assembly connected to the engine; the muffler has a top and a bottom disposed opposite each other in the height direction of the vehicle; wherein the bottom has a second notch for avoiding the steering assembly.

[0017] Optionally, the muffler is mounted to the engine via a bracket.

[0018] Optionally, the catalyst is mounted to the engine via clamps or flanges.

[0019] Optionally, the silencing device further includes a housing, the exterior of which is provided with a heat insulation layer.

[0020] Optionally, the powertrain further includes an electric motor located on one side of the muffler along the length of the vehicle. 。

[0021] Optionally, the powertrain further includes a steering assembly and a driveshaft assembly, the steering assembly being connected to the engine and the driveshaft assembly being connected to the motor; the steering assembly and the muffler are located on one side of the driveshaft assembly in the longitudinal direction of the vehicle.

[0022] According to a second aspect of this application, a vehicle is also provided, including the powertrain described above.

[0023] In the muffler device of this application embodiment, by arranging the muffler device on the side of the engine, the muffler device includes a catalytic converter and a muffler. By installing at least one of the muffler and the catalytic converter on the side of the engine, the installation distance between the exhaust pipe of at least one of the muffler and the catalytic converter and the engine is shortened, simplifying the structure of the exhaust pipe of the muffler device, which is beneficial to the lightweight design of the vehicle. At the same time, it can effectively reduce the space occupied by the exhaust pipe of at least one of the muffler and the catalytic converter on the middle floor, thereby freeing up the middle floor space to accommodate the battery pack and improve the pure electric range of the hybrid vehicle.

[0024] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0027] Figure 1 This is a schematic diagram of the overall structure of the powertrain of the vehicle provided in an exemplary embodiment of this disclosure;

[0028] Figure 2 This is a top view of the powertrain of a vehicle provided in an exemplary embodiment of this disclosure;

[0029] Figure 3 This is a right view of the powertrain of a vehicle provided in an exemplary embodiment of this disclosure;

[0030] Figure 4 This is a front view of the powertrain of a vehicle provided in an exemplary embodiment of this disclosure;

[0031] Figure 5a This is a rear view of the powertrain of a vehicle provided in an exemplary embodiment of this disclosure;

[0032] Figure 5b yes Figure 5a A magnified view of a portion of the image;

[0033] Figure 6This is a perspective view of the powertrain of a vehicle provided in an exemplary embodiment of this disclosure.

[0034] Explanation of reference numerals in the attached figures:

[0035] 100. Powertrain;

[0036] 10. Silencing device;

[0037] 1. Muffler; 11. Front side of muffler; 12. Rear side of muffler; 13. Bottom of muffler; 14. Top of muffler; 15. Air outlet; 16. First notch; 17. Second notch; 18. Housing; 19. Bracket;

[0038] 2. Catalyst; 21. Flange;

[0039] 3. Engine; 31. Exhaust port;

[0040] 4. Electric motor;

[0041] 5. Drive shaft assembly;

[0042] 6. Steering gear assembly;

[0043] 7. Fan; Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0045] Embodiments of this application provide a powertrain 100 for a hybrid vehicle, such as... Figures 1 to 6 As shown, the powertrain 100 includes a muffler 10, an engine 3, an electric motor 4, a drive shaft assembly 5, and a steering gear assembly 6.

[0046] The powertrain 100 is located in the front or rear compartment of the vehicle, such as... Figure 1 The fan 7 shown represents the front side of the vehicle. Figure 1 In this context, the X direction represents the length of the vehicle, pointing from front to rear. Figure 1 In this context, the Y-direction represents the width of the vehicle, pointing from left to right. For example... Figure 3 In this context, the Z direction represents the vehicle's height, pointing from the bottom to the top.

[0047] In a range-extended hybrid vehicle, motor 4 is connected to engine 3, engine 3 drives motor 4 to generate electricity, and motor 4 drives the vehicle. In one embodiment provided in this application, engine 3 is arranged laterally in the front compartment of the vehicle, motor 4 is connected to the rear side of engine 3, and engine 3 and motor 4 are arranged side by side along the length of the vehicle.

[0048] The driveshaft assembly 5 connects the motor 4 and the wheels, transmitting the driving force of the motor 4 to the wheels to propel the vehicle forward. The steering assembly 6 connects the engine 3 and the wheels, changing the steering angle of the wheels according to the driver's steering input. In one embodiment provided in this application, the steering assembly 6 and the driveshaft assembly 5 are spaced apart in a direction from the front to the rear of the vehicle.

[0049] A muffler 10 is connected to the engine 3 to treat the exhaust gases from the engine 3. The muffler 10 is installed on one side of the engine 3 and includes an integrated muffler 1 and a catalytic converter 2. The muffler 1 is used to muffle the exhaust gases from the engine 3, and the catalytic converter 2 is used to catalyze the exhaust gases from the engine 3.

[0050] At least one of the muffler 1 and the catalytic converter 2 is mounted on one side of the engine 3. By mounting at least one of the muffler 1 and the catalytic converter 2 on one side of the engine 3, the exhaust pipe connecting the catalytic converter 2 and the muffler 1 to the engine 3 is effectively shortened, which is beneficial for the lightweight design of the vehicle. At the same time, it can reduce the space occupied by the exhaust pipe of the muffler 1 and the catalytic converter 2 in the middle floor space, thereby freeing up the middle floor space to accommodate the battery pack and improve the pure electric range of the hybrid vehicle.

[0051] In some embodiments, such as Figure 2 and Figure 6 As shown, the muffler 1 and catalytic converter 2 are integrated and mounted on the same side of the engine 3. In a specific implementation, the engine 3 has a left and a right side opposite each other in the width direction Y of the vehicle, with the same side being either the left or right side of the engine 3. Alternatively, the engine 3 has a front and a rear side opposite each other in the length direction X of the vehicle, with the same side being either the front or rear side of the engine 3. Alternatively, the engine 3 has an upper and a lower side opposite each other in the height direction Z of the vehicle, with the same side being either the upper or lower side of the engine 3.

[0052] By integrating the muffler 1 and the catalytic converter 2 and mounting them on the same side of the engine 3, several beneficial effects are achieved:

[0053] Firstly, since the catalytic converter 2 is directly connected to the muffler 1, the exhaust pipe connecting the catalytic converter 2 and the muffler 1 can be eliminated. This allows for a reduction in the size of the integrated muffler device 10, enabling it to be housed within a smaller space on one side of the engine 3. Eliminating the exhaust pipe connecting the catalytic converter 2 and the muffler 1, as well as the necessary fixing structures such as the hanger rods, hanger sleeves, and the hanger rod assemblies, flanges 21, gaskets, bolts, and nuts used to secure the exhaust pipe, helps reduce the overall vehicle weight, assembly time, and costs.

[0054] Secondly, since the integrated catalytic converter 2 and muffler 1 are connected to the same side of the engine 3, the exhaust pipe connecting the muffler 1, catalytic converter 2 and engine 3 can be effectively shortened. At the same time, it helps to reduce the space occupied by the muffler 10 in the width direction of the vehicle's floor. The freed-up space in the width direction of the floor can be used to arrange the battery pack and improve the pure electric range of the hybrid vehicle.

[0055] In some embodiments, the catalytic converter 2 and the muffler 1 are respectively disposed on a first side and a second side of the engine 3, wherein the first side and the second side are adjacent to each other. By arranging the catalytic converter 2 and the muffler 1 adjacent to each other, the exhaust pipe connecting the catalytic converter 2 and the muffler 1 is simplified, which is beneficial for the lightweight design of the vehicle and reduces the space occupied by the exhaust pipe between the engine 3 and the muffler 10 on the floor, thereby increasing the space available for the battery pack and improving the pure electric driving range of the vehicle.

[0056] In a specific implementation, the engine 3 has a left and a right side opposite to each other in the width direction of the vehicle, a front and a right side opposite to each other in the length direction of the vehicle, and an upper and a lower side opposite to each other in the height direction of the vehicle, wherein the first side and the second side are two adjacent sides among the left, right, front, rear, upper and lower sides.

[0057] Along the height direction of the vehicle, Figure 3 In the figure, Z represents the height direction of the vehicle. The catalytic converter 2 is located on the side of the muffler 1 in the height direction of the vehicle. The gas discharged from the engine 3 first passes through the catalytic converter 2 for catalytic treatment. The gas after catalytic treatment by the catalytic converter 2 is provided to the muffler 1 for noise reduction treatment.

[0058] Integrating the muffler 1 and catalytic converter 2 and placing them on one side of the engine 3, with the catalytic converter 2 positioned on the side of the muffler 1 along the vehicle's height, offers several advantages:

[0059] Firstly, the muffler 10 is installed on the same side of the engine 3 and the catalytic converter 2 and muffler 1 are arranged along the height of the vehicle, so that the exhaust pipe of the muffler 10 does not need to pass through the middle floor space of the vehicle. While simplifying the exhaust pipe structure of the muffler 10, it also reduces the space occupied by the exhaust pipe of the muffler 10 in the middle floor space of the vehicle, so that the middle floor space of the vehicle can be arranged as much as possible to accommodate the battery pack, thereby improving the pure electric range of the hybrid vehicle.

[0060] Secondly, the muffler 10 is installed on the same side of the engine 3 and the catalytic converter 2 and muffler 1 are arranged along the height of the vehicle. The exhaust pipe of the muffler 10 is far away from the battery system and the fuel system. Therefore, the exhaust pipe of the muffler 10 is unlikely to generate heat radiation to the battery system and the fuel system, thereby effectively reducing the risk of heat damage to the battery system and the fuel system by the muffler 10.

[0061] Thirdly, the muffler 10 is integrated and installed on the same side of the engine 3, and the catalyst 2 and muffler 1 are arranged along the height direction of the vehicle, which is conducive to realizing the whole vehicle CTB scheme, that is, the battery pack is fixedly connected to the vehicle floor, which in turn helps to improve the torsional rigidity of the whole vehicle.

[0062] In some embodiments, the engine 3 has an exhaust port 31, and the muffler 10 is located on the same side of the engine 3 as the exhaust port 31. Specifically, the muffler 10 is directly connected to the exhaust port of the engine 3, which allows the exhaust gases from the engine 3 to directly enter the muffler 10 for processing, thereby reducing the space occupied by the engine assembly in the vehicle's interior. In specific implementations, when the engine 3 is configured with left-side air intake, the muffler 10 is installed on the right side of the engine 3, achieving left-side air intake and right-side exhaust. When the engine 3 is configured with right-side air intake, the muffler 10 is installed on the left side of the engine 3, achieving right-side air intake and left-side exhaust. The muffler 10 and the engine 3 together form a powertrain.

[0063] In one specific implementation, the muffler 10 is integrated with the engine 3 and placed in the front or rear compartment of the vehicle, which helps to reduce the space occupied by the engine assembly in the vehicle's interior.

[0064] By connecting the integrated catalytic converter 2 and muffler 1 to the same side of the engine 3 and installing them in the front or rear compartment of the vehicle, the space occupied by the muffler 10 and the engine 3 in the width direction of the vehicle's floor can be effectively reduced. The freed-up width direction space of the floor can be used to accommodate the battery pack, thereby increasing the pure electric range of the hybrid vehicle.

[0065] In one embodiment, the muffler 1 has a top 14 and a bottom 13 disposed opposite each other in the height direction of the vehicle. The catalytic converter 2 is disposed at the top 14 of the muffler, and the exhaust port 15 of the muffler 1 is located at the bottom 13 of the muffler 1. By placing the catalytic converter 2 at the top 14 of the muffler and the exhaust port 15 of the muffler 1 at the bottom 13 of the muffler, the exhaust system of the muffler 1 extends substantially along the height direction of the vehicle, thereby avoiding thermal damage to the battery pack arrangement space in the length direction of the vehicle.

[0066] Understandably, since the catalytic converter 2 and the muffler 1 are integrated into the muffler device 10, which is placed on the left or right side of the engine 3, and the catalytic converter 2 is directly connected to the muffler 1, there is no need to connect the catalytic converter 2 and the muffler 1 to the exhaust pipe. The integrated muffler device 10 is connected to the left or right side of the engine 3 and placed in the front or rear compartment of the vehicle. That is, the integrated muffler device does not need to occupy the space of the vehicle's floor. This space can be used entirely to arrange the battery pack, thereby realizing the interchangeability of the battery pack assembly of the hybrid vehicle and the battery pack assembly of the pure electric vehicle. While improving the pure electric range of the hybrid vehicle, it also realizes the common platform generation of the battery pack assembly of the hybrid vehicle and the pure electric vehicle.

[0067] In some embodiments, the muffler 1 has opposing front sides 11 and rear sides 12 in the longitudinal direction X of the vehicle, and opposing top sides 14 and bottom sides 13 in the vertical direction of the vehicle. The muffler 1 is provided with an air outlet 15, through which the gas after noise reduction treatment by the muffler 1 is discharged. The air outlet 15 of the muffler 1 is inclined, specifically, the axial direction of the air outlet 15 is as follows: Figure 5a and Figure 5b As shown in direction F, the air outlet 15 extends simultaneously in the direction from the front to the rear and from the top to the bottom, as... Figure 5a and Figure 5b As shown, the direction from the front to the rear of the vehicle is the X direction, and the direction from the top to the bottom of the vehicle is the Z direction. The F direction can be decomposed into the X and Z directions. By tilting the air outlet 15, it is beneficial to guide the gas to exit in a specific direction. In a specific embodiment, the angle between the axis of the air outlet 15 of the muffler 1 and the direction from the top to the bottom is α, and this angle α is greater than 45°, so that the air outlet 15 of the muffler 1 is designed in accordance with the requirements of regulations.

[0068] In one embodiment, such as Figure 1 and Figure 3 As shown, the bottom 13 of the muffler 1 is provided with a first notch 16, and the air outlet 15 is provided in the first notch 16. The muffler 1 is tilted and placed in the first notch 16, making the overall structure of the muffler 1 more compact.

[0069] In one embodiment, the bottom 13 of the muffler 1 is also provided with a second notch 17. The second notch 17 is located on the rear side 12 of the muffler 1 and extends to the bottom 13 of the muffler 1. The second notch 17 is used to avoid the steering gear assembly 6, so that the overall structure of the muffler 1 is more compact and occupies less space in the front compartment of the vehicle.

[0070] In one embodiment, the rear side 12 of the muffler 1 is mounted to the engine 3 by at least one bracket 19, thereby enabling the muffler 1 to be stably mounted on the engine.

[0071] In one embodiment, the catalyst 2 is located on top 14 of the muffler 1. The catalyst 2 is mounted on the engine 3 by clamps or flanges 21, so that the entire muffler 10 can be stably assembled on the engine 3.

[0072] In one embodiment, the silencing device 10 further includes a housing 18, which is provided with a heat insulation layer. The heat insulation layer can be any structure of a heat insulation cover or heat insulation cotton, or the heat insulation layer is a combination of a heat insulation cover and heat insulation cotton.

[0073] When the muffler 10 is installed in the front compartment of the vehicle, the gas discharged from the engine 3 enters the catalyst 2 and generates a large amount of heat through catalytic conversion reaction. In the embodiments of this application, a heat insulation layer is provided on the housing 18 of the muffler 10 to prevent heat from being transferred to the passenger compartment through the front compartment. At the same time, the impact of the large amount of heat generated by the catalytic reaction inside the catalyst 2 on the external environment can also be reduced.

[0074] In some embodiments, the motor 4 is located on one side of the muffler 10 along the length of the vehicle, which facilitates the integrated arrangement of the muffler 10 and the engine 3, thereby reducing the space occupied by the muffler 10 in the interior of the vehicle.

[0075] In some embodiments, the steering assembly 6 and the muffler 10 are located on one side of the driveshaft assembly 5 in the longitudinal direction of the vehicle, which facilitates the integrated arrangement of the muffler 10 with the engine 3 to reduce the space occupied by the muffler 10 in the interior of the vehicle.

[0076] The powertrain and motor integrated arrangement provided in this application embodiment can realize two-wheel drive or four-wheel drive.

[0077] The aforementioned muffler 10 can be used not only in hybrid vehicles but also in pure internal combustion engine vehicles. It can be applied to engines of various displacements (1.0L, 1.5L, 2.0L, 3.0L, etc.), engines with various numbers of cylinders (three-cylinder, four-cylinder, six-cylinder, etc.), engines with different cylinder arrangements (inline, V-type, W-type, horizontal arrangement, etc.), engines with various intake methods (naturally aspirated, turbocharged), engines with various ignition methods (spark ignition, compression ignition), engines with various combustion modes (homogeneous combustion, lean combustion), engines with various fuel injection methods (port injection, direct injection), and engines using various fuels (gasoline, hydrogen fuel, natural gas, liquefied petroleum gas, ammonia fuel, etc.).

[0078] According to a first aspect of this application, a powertrain is provided, including an engine; and a muffler connected to the engine, the muffler including a muffler and a catalytic converter, the muffler being adapted to muffle exhaust gases from the engine, and the catalytic converter being adapted to catalytically treat the exhaust gases from the engine; wherein at least one of the muffler and the catalytic converter is mounted on one side of the engine.

[0079] By arranging the muffler on the side of the engine, the muffler includes a catalytic converter and a muffler. By installing at least one of the muffler and the catalytic converter on the side of the engine, the space occupied by the exhaust pipe of at least one of the muffler and the catalytic converter on the middle floor can be effectively reduced. This frees up the middle floor space to accommodate the battery pack and improve the pure electric range of the hybrid vehicle.

[0080] According to a second aspect of this application, a vehicle is provided, including the powertrain provided in the above embodiments. Therefore, this vehicle possesses all the beneficial effects of the powertrain provided in the above embodiments, which will not be elaborated further herein.

[0081] The vehicle may be a gasoline vehicle, a plug-in hybrid vehicle, or a new energy vehicle, etc., and this disclosure does not make any specific restrictions.

[0082] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0083] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0084] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0085] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A powertrain, characterized in that, include: Engine (3); The motor (4) and the engine (3) are arranged side by side along the length of the vehicle; as well as A muffler (10) is connected to the engine (3); the muffler (10) includes a muffler (1) and a catalyst (2), the muffler (1) is adapted to muffle the gas discharged from the engine (3), and the catalyst (2) is adapted to catalyze the gas discharged from the engine (3); The catalyst (2) and the muffler (1) are located on the same side of the engine (3), which has a left side and a right side opposite to each other in the width direction of the vehicle, and the same side is the left side or the right side.

2. The powertrain according to claim 1, characterized in that, The powertrain is applicable to a vehicle, and the catalyst (2) is located on one side of the muffler (1) in the height direction of the vehicle.

3. The powertrain according to claim 1, characterized in that, The engine (3) has an exhaust port (31), wherein the muffler (10) and the exhaust port (31) are located on the same side of the engine (3).

4. The powertrain according to claim 1, characterized in that, The engine (3) and the muffler (10) are adapted to be installed in the front or rear compartment of the vehicle.

5. The powertrain according to claim 1, characterized in that, The muffler (1) has a top and a bottom that are disposed opposite each other in the height direction of the vehicle, and the muffler (1) is provided with an air outlet (15); wherein the catalyst (2) is disposed at the top and the air outlet (15) is disposed at the bottom.

6. The powertrain according to claim 1, characterized in that, The muffler (1) has a front side and a rear side disposed opposite to each other in the length direction of the vehicle, and a top and a bottom side disposed opposite to each other in the height direction of the vehicle; wherein the muffler (1) is provided with an air outlet (15) extending in the direction from the front side to the rear side and from the top side to the bottom side.

7. The powertrain according to claim 6, characterized in that, The angle between the axis of the air outlet (15) and the direction from the top to the bottom is set to be greater than 45°.

8. The powertrain according to claim 7, characterized in that, The muffler (1) has a top and a bottom that are disposed opposite each other in the height direction of the vehicle; wherein, the bottom of the muffler (1) is provided with a first notch (16), and the air outlet (15) is disposed in the first notch (16).

9. The powertrain according to claim 1, characterized in that, The powertrain also includes a steering assembly (6) connected to the engine (3); the muffler (1) has a top and a bottom disposed opposite each other in the height direction of the vehicle; wherein the bottom is provided with a second notch (17) for avoiding the steering assembly (6).

10. The powertrain according to claim 1, characterized in that, The muffler (1) is mounted on the engine (3) via a bracket (19).

11. The powertrain according to claim 1, characterized in that, The catalyst (2) is mounted to the engine (3) via a clamp or flange (21).

12. The powertrain according to claim 1, characterized in that, The silencing device (10) also includes a housing (18), and the exterior of the housing (18) is provided with a heat insulation layer.

13. The powertrain according to claim 1, characterized in that, The motor (4) is located on one side of the muffler (10) in the longitudinal direction of the vehicle.

14. The powertrain according to claim 13, characterized in that, The powertrain also includes a steering assembly (6) and a driveshaft assembly (5), the steering assembly (6) being connected to the engine (3) and the driveshaft assembly (5) being connected to the motor (4); the steering assembly (6) and the muffler (10) are located on one side of the driveshaft assembly (5) in the length direction of the vehicle.

15. A vehicle, characterized in that, Includes the powertrain as described in any one of claims 1 to 14.

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