Muffler assembly of vehicle and vehicle

Abstract

The utility model discloses a silencer assembly of a vehicle and the vehicle, and relates to the technical field of vehicles. The silencer assembly of the vehicle comprises a shell, a partition plate, a first exhaust pipe, a second exhaust pipe, a core pipe and an air outlet pipe, the partition plate is arranged in a cavity and divides the cavity into a plurality of sub-cavities, the sub-cavities comprise the first sub-cavity and the second sub-cavity, the first exhaust pipe is suitable for being communicated with an engine of the vehicle and the first sub-cavity, and the second exhaust pipe is suitable for being communicated with the second sub-cavity. The second exhaust pipe is suitable for communicating the engine and the second sub-cavity, and the core pipe communicates the first sub-cavity and the second sub-cavity. The core pipe is communicated with the first sub-cavity and the second sub-cavity, the length difference between the first exhaust pipe and the second exhaust pipe can be made up through the length of the core pipe, and airflow entering the second sub-cavity through the second exhaust pipe can enter the first sub-cavity through the core pipe and is overlapped with airflow entering the first sub-cavity through the first exhaust pipe; the two air flows are superposed to generate sound waves with equal sound pressure and opposite phases, so that the half-order noise can be reduced, and the vehicle use experience of a user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a muffler component of a vehicle and the vehicle. Background Art

[0002] In the related art, a large-displacement engine generally has two exhaust pipes, both of which are connected to the muffler shell. However, due to the chassis layout, the lengths of the first exhaust pipe and the second exhaust pipe are not equal, which makes the muffler have poor silencing effect on half-order noise, seriously affecting the user's car experience. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a muffler assembly for a vehicle to reduce half-order noise and improve the user's vehicle experience.

[0004] The utility model further provides a vehicle.

[0005] According to the muffler assembly of the embodiment of the utility model, it includes: a shell and a partition plate, the shell defines a cavity, the partition plate is arranged in the cavity and divides the cavity into a plurality of sub-cavities, the plurality of sub-cavities include a first sub-cavity and a second sub-cavity; a first exhaust pipe, a second exhaust pipe, a core pipe and an exhaust pipe, the first exhaust pipe is suitable for connecting the engine of the vehicle and the first sub-cavity, the second exhaust pipe is suitable for connecting the engine and the second sub-cavity, the core pipe connects the first sub-cavity and the second sub-cavity, the exhaust pipe connects the first sub-cavity and the outside of the shell, and the length of the second exhaust pipe is less than the length of the first exhaust pipe.

[0006] According to the muffler assembly of the embodiment of the utility model, by connecting the first sub-cavity and the second sub-cavity through the core tube, the length difference between the first exhaust pipe and the second exhaust pipe can be compensated by the length of the core tube, so that the airflow entering the second sub-cavity through the second exhaust pipe can enter the first sub-cavity through the core tube and overlap with the airflow entering the first sub-cavity through the first exhaust pipe. The superposition of the two airflows will generate sound waves with equal sound pressure and opposite phases, thereby reducing half-order noise to enhance the user's car experience.

[0007] According to some embodiments of the present invention, the length of the first exhaust pipe is A, the length of the second exhaust pipe is B, and the length of the core pipe is C, satisfying the relationship: 0.95C≤AB≤1.05C.

[0008] According to some embodiments of the present invention, along the first direction, the size of the second sub-cavity is D, and the size of the cavity is E, satisfying the relationship: D≤E / 5.

[0009] According to some embodiments of the present invention, the second exhaust pipe comprises: a connected second exhaust pipe body and a connecting pipe, the second exhaust pipe body is suitable for communicating with the engine, and the connecting pipe connects the second exhaust pipe body and the second sub-chamber.

[0010] According to some embodiments of the present invention, along a first direction, the first sub-cavity and the second sub-cavity are arranged at intervals, and the core tube, the air outlet pipe, and the connecting tube all extend along the first direction.

[0011] According to some embodiments of the utility model, along the second direction, the core pipe, the air outlet pipe, and the connecting pipe are arranged in sequence, the core pipe is arranged corresponding to the first exhaust pipe, and the second direction is perpendicular to the first direction.

[0012] According to some embodiments of the present utility model, the plurality of sub-cavities further include: a third sub-cavity, and the tube wall of the air outlet pipe located in the third sub-cavity has a plurality of through holes.

[0013] According to some embodiments of the present invention, a sound-absorbing material is provided in the third sub-cavity.

[0014] According to some embodiments of the utility model, the partition plate includes a first partition plate and a second partition plate, and the first partition plate and the second partition plate are arranged at intervals to divide the cavity into the first sub-cavity, the second sub-cavity and the third sub-cavity; the core tube and the second exhaust pipe are both passed through the first partition plate, and the outlet pipe is sequentially passed through the first partition plate, the second partition plate, and the shell.

[0015] A vehicle according to an embodiment of the utility model includes the above-mentioned vehicle muffler assembly.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a schematic diagram of a muffler assembly according to an embodiment of the utility model;

[0019] Figure 2 It is a graph showing the comparative effect of setting a core tube or not on reducing half-order noise.

[0020] Reference numerals:

[0021] Shell 1; Cavity 11;

[0022] A first partition plate 21; a second partition plate 22;

[0023] A first exhaust pipe 3;

[0024] Second exhaust pipe 4; second exhaust pipe body 41; connecting pipe 42;

[0025] Core tube 5;

[0026] A first sub-cavity 61; a second sub-cavity 62; a third sub-cavity 63;

[0027] Air outlet pipe 7; through hole 71;

[0028] Muffler assembly 100 . DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] Reference below Figure 1 and Figure 2 A muffler assembly 100 for a vehicle according to an embodiment of the present invention is described.

[0031] like Figure 1 As shown, the muffler assembly 100 of a vehicle according to an embodiment of the utility model includes: a shell 1, a partition plate, a first exhaust pipe 3, a second exhaust pipe 4, a core pipe 5 and an exhaust pipe 7. The partition plate is arranged in the cavity 11 and divides the cavity 11 into a plurality of sub-cavities. The plurality of sub-cavities include a first sub-cavity 61 and a second sub-cavity 62. The first exhaust pipe 3 is suitable for connecting the engine of the vehicle and the first sub-cavity 61, the second exhaust pipe 4 is suitable for connecting the engine and the second sub-cavity 62, the core pipe 5 connects the first sub-cavity 61 and the second sub-cavity 62, the exhaust pipe 7 connects the first sub-cavity 61 and the outside of the shell 1, and the length of the second exhaust pipe 4 is less than the length of the first exhaust pipe 3.

[0032] The muffler assembly 100 includes a shell 1 and a partition plate. The shell 1 is the outer shell part of the muffler assembly 100. The wall surface of the shell 1 can be provided with reinforcing ribs to enhance the mode of the shell 1. A plurality of partition plates are provided in the shell 1, and the plurality of partition plates are fixedly connected to the shell 1.

[0033] As some embodiments of the present application, the shell 1 and the multiple partition plates can be assembled by interference fit. The interference fit structure is simple. By making the shell 1 and the multiple partition plates interference fit, there is no need to introduce new parts, which is conducive to the lightweight design of the muffler assembly 100.

[0034] As some embodiments of the present application, the shell 1 and the plurality of partition plates may be assembled by welding.

[0035] As some embodiments of the present application, the shell 1 and the multiple partition plates can be assembled by interference fit and welding to enhance the stability of the connection between the shell 1 and the multiple partition plates and improve the overall structural strength.

[0036] The housing 1 defines a cavity 11, and a plurality of partition plates are disposed in the cavity 11. The plurality of partition plates are arranged along a first direction (i.e. Figure 1 The cavity 11 is divided into a plurality of sub-cavities, the plurality of sub-cavities including the cavity 11 and the cavity 11 along the first direction (ie, the X direction shown in FIG. Figure 1 The first sub-cavity 61 and the second sub-cavity 62 are arranged in the X direction (as shown).

[0037] The muffler assembly 100 further includes a first exhaust pipe 3, a second exhaust pipe 4, a core pipe 5 and an outlet pipe 7. The first exhaust pipe 3 has two opposite ends. One end of the first exhaust pipe 3 is in communication with the engine of the vehicle, and the other end of the first exhaust pipe 3 is in communication with the first sub-chamber 61. The airflow discharged from the engine includes a first part of the airflow and a second part of the airflow. The first part of the airflow can enter the first sub-chamber 61 through the first exhaust pipe 3. The second exhaust pipe 4 has two opposite ends. One end of the second exhaust pipe 4 is in communication with the engine of the vehicle, and the other end of the second exhaust pipe 4 is in communication with the second sub-chamber 62. The second part of the airflow can enter the second sub-chamber 62 through the second exhaust pipe 4. The core pipe 5 can be constructed as a tubular structure with two ends open. The core pipe 5 is located in the housing 1, and the core pipe 5 is in communication with the first sub-chamber 61 and the second sub-chamber 62. The outlet pipe 7 can be constructed as a tubular structure with two ends open. The outlet pipe 7 is in communication with the first sub-chamber 61 and the outside of the housing 1.

[0038] The second part of the airflow entering the second sub-chamber 62 will enter the first sub-chamber 61 through the core tube 5. In the first sub-chamber 61, the first part of the airflow is superimposed with the second part of the airflow, and this superposition can reduce the airflow noise. The length of the second exhaust pipe 4 is less than the length of the first exhaust pipe 3, and the length of the core tube 5 can make up for the length difference between the first exhaust pipe 4 and the second exhaust pipe 3. After the first part of the airflow is superimposed with the second part of the airflow, a sound wave with equal sound pressure and opposite phase will be generated, thereby reducing the half-order noise.

[0039] As some embodiments of the present application, the sum of the length of the second exhaust pipe 4 and the length of the core pipe 5 can be equal to the length of the first exhaust pipe 3. When the sum of the length of the second exhaust pipe 4 and the length of the core pipe 5 is equal to the length of the first exhaust pipe 3, the half-order noise can be more effectively reduced.

[0040] like Figure 2As shown, the solid line in the figure is the silencer effect on the half-order noise when the core tube 5 is not set, and the dotted line in the figure is the silencer effect on the half-order noise when the core tube 5 is set. It can be clearly seen that when rpm is less than 2800r / min or rpm is greater than 3300r / min, the silencer assembly 100 of the present application can better reduce the half-order noise.

[0041] By connecting the core tube 5 to the first sub-cavity 61 and the second sub-cavity 62, the length difference between the first exhaust pipe 3 and the second exhaust pipe 4 can be compensated by the length of the core tube 5, so that the airflow entering the second sub-cavity 62 through the second exhaust pipe 4 can enter the first sub-cavity 61 through the core tube 5 and overlap with the airflow entering the first sub-cavity 61 through the first exhaust pipe 3. The superposition of the two airflows will generate sound waves with equal sound pressure and opposite phases, thereby reducing half-order noise to enhance the user's car experience.

[0042] As some embodiments of the present application, the engine may have two exhaust manifolds, the first exhaust pipe 3 is connected between one exhaust manifold and the first sub-chamber 61 , and the second exhaust pipe 4 is connected between the other exhaust manifold and the second sub-chamber 62 .

[0043] In some embodiments of the present invention, Figure 1 As shown, the length of the first exhaust pipe 3 is A, the length of the second exhaust pipe 4 is B, and the length of the core pipe 5 is C, satisfying the relationship: 0.95C≤AB≤1.05C.

[0044] The length of the first exhaust pipe 3 is A, the length of the second exhaust pipe 4 is B, and the length of the core pipe 5 is C. A, B, and C satisfy the relationship: 0.95C≤AB≤1.05C. For example, AB can be 0.95C, C, or 1.05C. In other words, (AB) / C=0.95, (AB) / C=1, or (AB) / C=1.05. This arrangement can make the sum of the length of the second exhaust pipe 4 and the length of the core pipe 5 equal to or approximately equal to the length of the first exhaust pipe 3, so that the first part of the airflow and the second part of the airflow can be superimposed to generate sound waves with equal sound pressure and opposite phases, thereby reducing half-order noise.

[0045] In some embodiments of the present invention, Figure 1 As shown, along the first direction (i.e. Figure 1 The dimension of the second sub-cavity 62 is D, and the dimension of the cavity 11 is E, which satisfies the relationship: D≤E / 5.

[0046] Along the first direction (i.e. Figure 1The size of the second sub-cavity 62 (in the X direction shown in the figure) is D, and the size of the cavity 11 is E, and D and E satisfy the relationship: D≤E / 5. For example, D can be E / 5, E / 6 or E / 7, etc. In other words, E / D=1 / 5, E / D=1 / 6 or E / D=1 / 7, etc. This arrangement can ensure that after the second part of the airflow enters the second sub-cavity 62, it can directly flow to the core tube 5 and enter the first sub-cavity 61 through the core tube 5, so as to better realize the superposition of the first part of the airflow and the second part of the airflow, and then generate sound waves with equal sound pressure and opposite phases through superposition, so as to reduce half-order noise.

[0047] In some embodiments of the present invention, Figure 1 As shown, the second exhaust pipe 4 includes: a second exhaust pipe body 41 and a connecting pipe 42 that are connected. The second exhaust pipe body 41 is suitable for connecting with the engine, and the connecting pipe 42 connects the second exhaust pipe body 41 with the second sub-chamber 62 .

[0048] The second exhaust pipe 4 includes a second exhaust pipe body 41 and a connecting pipe 42, and the second exhaust pipe body 41 and the connecting pipe 42 are connected. As some embodiments of the present application, the second exhaust pipe body 41 and the connecting pipe 42 can be the same type of pipe, that is, the second exhaust pipe body 41 and the connecting pipe 42 have the same material and the same pipe diameter. As other embodiments of the present application, the second exhaust pipe body 41 and the connecting pipe 42 can be different types of pipes, that is, the materials and pipe diameters of the second exhaust pipe body 41 and the connecting pipe 42 can be set according to actual conditions.

[0049] As some embodiments of the present application, the second exhaust pipe body 41 and the connecting pipe 42 can be separate parts, and the second exhaust pipe body 41 and the connecting pipe 42 can be designed, manufactured and replaced separately. Such a setting can increase the flexibility of the design of the muffler assembly 100 components and the diversity of the material selection of the muffler assembly 100 components.

[0050] Moreover, in the actual production process, the connecting pipe 42 can be first assembled to the shell 1, and then the second exhaust pipe body 41 and the connecting pipe 42 can be connected, which can facilitate the assembly of the muffler assembly 100. As some embodiments of the present application, the second exhaust pipe body 41 and the connecting pipe 42 can be welded or bolted. As some other embodiments of the present application, the second exhaust pipe body 41 and the connecting pipe 42 can be connected by interference fit, and the interference fit has a simple structure, good coaxiality and can withstand large axial forces, torques and dynamic loads. Moreover, by making the second exhaust pipe body 41 and the connecting pipe 42 interference fit, there is no need to introduce new parts, which is conducive to the lightweight design of the muffler assembly 100.

[0051] In some embodiments of the present invention, Figure 1 As shown, along the first direction (i.e. Figure 1 The first sub-cavity 61 and the second sub-cavity 62 are arranged at intervals, and the core tube 5, the air outlet pipe 7, and the connecting pipe 42 all extend along the first direction.

[0052] Along the first direction (i.e. Figure 1 The first sub-cavity 61 and the second sub-cavity 62 are arranged alternately, and the core tube 5, the air outlet pipe 7, and the connecting pipe 42 are all arranged along the first direction (i.e. Figure 1 The core tube 5 is connected to the first sub-cavity 61 and the second sub-cavity 62, the outlet pipe 7 is connected to the first sub-cavity 61 and the outside of the shell 1, and the connecting pipe 42 connects the second exhaust pipe body 41 and the second sub-cavity 62. This arrangement can make the layout of the muffler assembly 100 convenient and reasonable, so that the gas flow direction in the core tube 5, the outlet pipe 7, and the connecting pipe 42 is the same as the arrangement direction of the first sub-cavity 61 and the second sub-cavity 62, which is conducive to the flow of air in the muffler assembly 100 to better eliminate airflow noise.

[0053] In some embodiments of the present invention, Figure 1 As shown, along the second direction (i.e. Figure 1 The core tube 5, the air outlet pipe 7, and the connecting pipe 42 are arranged in sequence, the core tube 5 is arranged corresponding to the first exhaust pipe 3, and the second direction (ie Figure 1 The Y direction shown) and the first direction (i.e. Figure 1 The X direction shown is perpendicular to the

[0054] The corresponding arrangement of the core tube 5 and the first exhaust pipe 3 can be understood as setting a plane, which is parallel to the first direction (i.e. Figure 1 The X direction shown in FIG. 1 is perpendicular to the plane, that is, the normal of the plane is perpendicular to the first direction (that is, Figure 1 The first exhaust pipe 3 is parallel to the X direction shown in FIG. 1 , and the orthographic projection of the end of the core tube 5 close to the first exhaust pipe 3 and the end of the first exhaust pipe 3 close to the core tube 5 on the plane have an overlapping area. This arrangement allows the second part of the airflow from the core tube 5 flowing into the first sub-cavity 61 to be more fully superimposed with the first part of the airflow from the first exhaust pipe 3 flowing into the first sub-cavity 61, so as to more effectively reduce the half-order noise.

[0055] The second direction (i.e. Figure 1 The Y direction shown) and the first direction (i.e. Figure 1 The core tube 5, the air outlet pipe 7, and the connecting pipe 42 are all along the first direction (i.e. Figure 1 The X direction shown in FIG. 1 extends along the second direction (i.e. Figure 1 In the Y direction shown in the figure, the core tube 5, the air outlet pipe 7, and the connecting pipe 42 are arranged in sequence. This arrangement facilitates the airflow to circulate in the muffler assembly 100, and is more conducive to the full superposition of the first part of the airflow and the second part of the airflow to generate sound waves with equal sound pressure and opposite phases, so as to reduce the half-order noise.

[0056] As some embodiments of the present application, the second direction is the width direction of the vehicle, and the first direction is the length direction of the vehicle.

[0057] In some embodiments of the present invention, Figure 1 As shown, the multiple sub-cavities further include: a third sub-cavity 63 , and the wall of the air outlet pipe 7 located in the third sub-cavity 63 has multiple through holes 71 .

[0058] The plurality of sub-cavities include a first sub-cavity 61, a second sub-cavity 62 and a third sub-cavity 63. Figure 1 The first sub-cavity 61, the second sub-cavity 62 and the third sub-cavity 63 can be arranged in sequence, the air outlet pipe 7 can be constructed as a tubular structure with openings at both ends, the air outlet pipe 7 connects the first sub-cavity 61 and the outside of the shell 1 and passes through the second sub-cavity 62 and the third sub-cavity 63, the first part of the airflow and the second part of the airflow are superimposed in the first sub-cavity 61 and converged into the third part of the airflow, the third part of the airflow enters the air outlet pipe 7, the tube wall of the air outlet pipe 7 located in the third sub-cavity 63 has a plurality of through holes 71, the third part of the airflow can enter the third sub-cavity 63 through the plurality of through holes 71 to reduce high-frequency noise.

[0059] In some embodiments of the present invention, Figure 1 As shown, the third sub-cavity 63 is provided with a sound-absorbing material.

[0060] A sound-absorbing material is provided in the third sub-cavity 63, and the sound-absorbing material may be polyurethane foam or sponge. The third part of the airflow enters the third sub-cavity 63 through a plurality of through holes 71, and the third part of the airflow may rub against the sound-absorbing material in the third sub-cavity 63 to convert sound energy into heat energy, thereby effectively reducing high-frequency noise, which is beneficial to improving the user's vehicle experience.

[0061] In some embodiments of the present invention, Figure 1 As shown, the partition plate includes a first partition plate 21 and a second partition plate 22, and the first partition plate 21 and the second partition plate 22 are arranged at intervals to divide the cavity 11 into a first sub-cavity 61, a second sub-cavity 62 and a third sub-cavity 63. The core tube 5 and the second exhaust pipe 4 are both passed through the first partition plate 21, and the exhaust pipe 7 is sequentially passed through the first partition plate 21, the second partition plate 22, and the shell 1.

[0062] The partition plate includes a first partition plate 21 and a second partition plate 22, and the first partition plate 21 and the second partition plate 22 are located in the shell 1. The first partition plate 21 and the second partition plate 22 are fixedly connected to the shell 1. The first partition plate 21 and the second partition plate 22 can support the shell 1 so that the shell 1 can maintain its shape unchanged during operation. In addition, the first partition plate 21 and the second partition plate 22 are arranged at intervals to divide the cavity 11 into a first sub-cavity 61, a second sub-cavity 62 and a third sub-cavity 63. The core tube 5 and the second exhaust pipe 4 are both arranged in the first partition plate 21, and the exhaust pipe 7 is sequentially arranged in the first partition plate 21, the second partition plate 22, and the shell 1.

[0063] Such an arrangement can make the structure of the muffler assembly 100 reasonable, and can reliably divide the cavity 11 into the first sub-cavity 61, the second sub-cavity 62 and the third sub-cavity 63. Moreover, the first partition plate 21 can be used to fix the core tube 5, and the first partition plate 21 and the second partition plate 22 can both be used to fix the outlet pipe 7 to reduce the probability of the core tube 5 and the outlet pipe 7 shaking, so that the muffler assembly 100 has a reliable muffler function.

[0064] The vehicle according to the embodiment of the utility model includes the above-mentioned muffler assembly 100. By connecting the first sub-cavity 61 and the second sub-cavity 62 with the core tube 5, the length difference between the first exhaust pipe 3 and the second exhaust pipe 4 can be compensated by the length of the core tube 5, so that the airflow entering the second sub-cavity 62 through the second exhaust pipe 4 can enter the first sub-cavity 61 through the core tube 5 and overlap with the airflow entering the first sub-cavity 61 through the first exhaust pipe 3. The superposition of the two airflows will generate sound waves with equal sound pressure and opposite phases, thereby reducing half-order noise to enhance the user's vehicle experience.

[0065] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0066] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0067] In the description of the present invention, "plurality" means two or more.

[0068] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0069] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0071] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A muffler assembly (100) for a vehicle, characterized in that: include: A shell (1) and a partition plate, the shell (1) defining a cavity (11), the partition plate being arranged in the cavity (11) and dividing the cavity (11) into a plurality of sub-cavities, the plurality of sub-cavities comprising a first sub-cavity (61) and a second sub-cavity (62); A first exhaust pipe (3), a second exhaust pipe (4), a core pipe (5) and an exhaust pipe (7); the first exhaust pipe (3) is suitable for connecting the engine of the vehicle and the first sub-cavity (61); the second exhaust pipe (4) is suitable for connecting the engine and the second sub-cavity (62); the core pipe (5) connects the first sub-cavity (61) and the second sub-cavity (62); the exhaust pipe (7) connects the first sub-cavity (61) and the outside of the housing (1); and the length of the second exhaust pipe (4) is shorter than the length of the first exhaust pipe (3).

2. The muffler assembly (100) for a vehicle according to claim 1, characterized in that: The length of the first exhaust pipe (3) is A, the length of the second exhaust pipe (4) is B, and the length of the core pipe (5) is C, satisfying the relationship: 0.95C≤AB≤1.05C.

3. The muffler assembly (100) for a vehicle according to claim 1, characterized in that: Along the first direction, the size of the second sub-cavity (62) is D, and the size of the cavity (11) is E, satisfying the relationship: D≤E / 5.

4. The muffler assembly (100) for a vehicle according to claim 1, characterized in that: The second exhaust pipe (4) comprises: a second exhaust pipe body (41) and a connecting pipe (42) which are connected to each other; the second exhaust pipe body (41) is suitable for being connected to the engine; and the connecting pipe (42) connects the second exhaust pipe body (41) and the second sub-chamber (62).

5. The muffler assembly (100) for a vehicle according to claim 4, characterized in that: Along a first direction, the first sub-cavity (61) and the second sub-cavity (62) are arranged at intervals, and the core tube (5), the air outlet tube (7), and the connecting tube (42) all extend along the first direction.

6. The muffler assembly (100) for a vehicle according to claim 5, characterized in that: Along the second direction, the core tube (5), the air outlet pipe (7), and the connecting pipe (42) are arranged in sequence, the core tube (5) is arranged corresponding to the first exhaust pipe (3), and the second direction is perpendicular to the first direction.

7. The muffler assembly (100) for a vehicle according to claim 1, characterized in that: The plurality of sub-cavities further include: a third sub-cavity (63); the wall of the air outlet pipe (7) located in the third sub-cavity (63) has a plurality of through holes (71).

8. The muffler assembly (100) for a vehicle according to claim 7, characterized in that: The third sub-chamber (63) is provided with a sound-absorbing material.

9. The muffler assembly (100) for a vehicle according to claim 7, characterized in that: The partition plate comprises a first partition plate (21) and a second partition plate (22), wherein the first partition plate (21) and the second partition plate (22) are arranged at intervals to divide the cavity (11) into the first sub-cavity (61), the second sub-cavity (62) and the third sub-cavity (63); The core tube (5) and the second exhaust pipe (4) are both arranged through the first partition plate (21), and the exhaust pipe (7) is arranged through the first partition plate (21), the second partition plate (22), and the shell (1) in sequence.

10. A vehicle, characterized in that: A muffler assembly (100) for a vehicle comprising any one of claims 1-9.

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