Exhaust device of vehicle and vehicle

Abstract

The utility model discloses an exhaust device of a vehicle and the vehicle, the exhaust device comprises: a silencing member, the silencing member is provided with an air inlet, the air inlet is used for communicating with an exhaust port of an engine; the first air outlet pipe and the second air outlet pipe are arranged on the silencing part, and the diameter of the first air outlet pipe is smaller than that of the second air outlet pipe; the on-off valve is arranged on at least one of the first air outlet pipe and the second air outlet pipe so as to control on-off of the first air outlet pipe and / or the second air outlet pipe. As the diameter of the first gas outlet pipe is smaller than that of the second gas outlet pipe, when the engine operates at low load, waste gas is controlled to flow through the first gas outlet pipe, the expansion ratio and the transmission loss are increased, the silencing effect is improved, and the problem of low-frequency noise is solved.

Description

Technical Field

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

[0002] In the related art, the engine is the main source of noise during vehicle driving. The exhaust system, as one of the main noise-reducing components for reducing engine noise, is of great use in controlling engine noise. However, the problem of low-frequency noise in the exhaust system is relatively serious in the related art. 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, the utility model provides an exhaust device for a vehicle, which improves the problem of low-frequency noise.

[0004] According to the exhaust device of a vehicle in an embodiment of the utility model, the exhaust device includes: a muffler, the muffler is provided with an air inlet, the air inlet is used to connect to the exhaust port of the engine; a first outlet pipe and a second outlet pipe, the first outlet pipe and the second outlet pipe are respectively arranged on the muffler, the diameter of the first outlet pipe is smaller than the diameter of the second outlet pipe; an on-off valve, the on-off valve is arranged on at least one of the first outlet pipe and the second outlet pipe to control the on-off of the first outlet pipe and / or the second outlet pipe.

[0005] According to the exhaust device of the vehicle in the embodiment of the utility model, by setting the diameter of the first outlet pipe to be smaller than the diameter of the second outlet pipe, when the engine is running at a low load, the exhaust gas flow is controlled to flow through the first outlet pipe, thereby increasing the expansion ratio and the transmission loss, improving the silencing effect, and thus improving the problem of low-frequency noise.

[0006] In some embodiments, the first air outlet pipe and the second air outlet pipe are arranged on different sides of the muffler.

[0007] In some embodiments, the silencer has a first side and a second side, the first side and the second side are arranged opposite to each other, the air inlet is arranged on the first side, the first air outlet pipe is arranged on the first side, the second air outlet pipe is arranged on the second side, and the first air outlet pipe extends toward the second air outlet pipe.

[0008] In some embodiments, the first air outlet pipe includes: an arc-shaped portion, which is disposed on the first side surface; and an extension portion, one end of which is connected to the arc-shaped portion and the other end of which extends toward the second air outlet pipe.

[0009] In some embodiments, the on-off valve includes: a baffle, which is movably disposed in the first air outlet pipe and / or the second air outlet pipe to open and close the first air outlet pipe and / or the second air outlet pipe; a driving member, which is disposed outside the first air outlet pipe and / or the second air outlet pipe, and the driving member is connected to the baffle to drive the baffle to move.

[0010] In some embodiments, the on-off valve is installed on the second air outlet pipe.

[0011] In some embodiments, a silencer pipe is provided on the first air outlet pipe and / or the second air outlet pipe, and the silencer pipe has a silencer space to reduce noise.

[0012] In some embodiments, the sound-absorbing pipe includes: an inner pipe, the inner pipe is connected to the first air outlet pipe and / or the second air outlet pipe, and the inner pipe is provided with a flow hole connected to the sound-absorbing space; an outer shell, the outer shell is outer-fitted onto the inner pipe, and the outer shell and the inner pipe together define the sound-absorbing space; a sound-absorbing component, the sound-absorbing component is arranged in the sound-absorbing space, and the sound-absorbing component includes a polyester fiber component and / or a polyurethane component.

[0013] A vehicle according to an embodiment of the utility model includes the above-mentioned exhaust device.

[0014] According to the vehicle of the embodiment of the utility model, by setting the diameter of the first outlet pipe to be smaller than the diameter of the second outlet pipe, when the engine is running at low load, the exhaust gas flow is controlled to flow through the first outlet pipe, thereby increasing the expansion ratio and transmission loss, improving the silencing effect, and thus improving the problem of low-frequency noise.

[0015] In some embodiments, the vehicle further includes: a vehicle body, one end of which is configured as a rear end of the vehicle; wheels, which are arranged on the vehicle body; wherein the first air outlet pipe has a first air outlet, the second air outlet pipe has a second air outlet, and the first air outlet and the second air outlet are arranged between the rear end of the vehicle and the wheels.

[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 This is a schematic diagram of the structure of the exhaust device in the embodiment of the utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of the structure of the middle on-off valve, wherein the baffle is spaced apart from the inner wall of the surrounding pipe;

[0020] Figure 3 for Figure 1 Schematic diagram of the structure of the medium on-off valve, in which the baffle is in contact with the inner wall of the surrounding pipe;

[0021] Figure 4 for Figure 1 Schematic diagram of the structure of the middle muffler pipe;

[0022] Figure 5 for Figure 4 Exploded view of the middle muffler;

[0023] Figure 6 An exhaust system in the related art;

[0024] Figure 7 for Figure 1 Exhaust system with Figure 6 Comparison of the effects of the exhaust system Figure 1 ;

[0025] Figure 8 for Figure 1 Exhaust system with Figure 6 Comparison of the effects of the exhaust system Figure 2 ;

[0026] Fig. 9 for Figure 1 Exhaust system with Figure 6 Comparison of the effects of the exhaust system Figure 3 ;

[0027] Fig.10 for Figure 1 Exhaust system with Figure 6 Comparison of the effects of the exhaust system Figure 4 .

[0028] Reference numerals:

[0029] 100. Exhaust device;

[0030] 10. muffler; 11. air inlet; 12. first side surface; 13. second side surface;

[0031] 20. first air outlet pipe; 21. arc-shaped portion; 22. extension portion; 23. muffler pipe; 232. inner pipe; 233. outer shell;

[0032] 24. First air outlet;

[0033] 30. Second air outlet pipe; 31. Second air outlet; 40. On / off valve; 41. Baffle; 42. Driving member. DETAILED DESCRIPTION

[0034] 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.

[0035] In the description of the present utility model, it is necessary to understand 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Unless otherwise specified, the front-to-back direction in this application is the longitudinal direction of the vehicle, that is, the X direction; the left-right direction is the lateral direction of the vehicle, that is, the Y direction; and the up-down direction is the vertical direction of the vehicle, that is, the Z direction.

[0038] Reference below Figure 1-Figure 10 An exhaust device 100 for a vehicle according to an embodiment of the present invention is described.

[0039] Reference Figure 1 As shown, an exhaust device 100 for a vehicle according to an embodiment of the present utility model comprises: a muffler 10 , a first air outlet pipe 20 , a second air outlet pipe 30 and an on-off valve 40 .

[0040] The muffler 10 is provided with an air inlet 11, and the air inlet 11 is used to communicate with the exhaust port of the engine. The first air outlet pipe 20 and the second air outlet pipe 30 are respectively provided on the muffler 10, and the diameter of the first air outlet pipe 20 is smaller than the diameter of the second air outlet pipe 30. The on-off valve 40 is provided on at least one of the first air outlet pipe 20 and the second air outlet pipe 30 to control the on-off of the first air outlet pipe 20 and / or the second air outlet pipe 30.

[0041] The exhaust port of the engine is connected to the air inlet 11 of the muffler 10, and the exhaust gas discharged by the engine flows into the muffler 10, and the muffler 10 exerts a noise reduction effect to reduce noise.

[0042] A first air outlet pipe 20 and a second air outlet pipe 30 are respectively arranged at different positions on the silencer 10. The exhaust gas flows to the first air outlet pipe 20 or the second air outlet pipe 30 after passing through the silencer 10. An on-off valve 40 is arranged on the first air outlet pipe 20 and / or the second air outlet pipe 30. The on-off valve 40 indirectly controls the flow direction of the exhaust gas by controlling the on-off of the first air outlet pipe 20 and / or the second air outlet pipe 30.

[0043] For example, the on-off valve 40 is arranged on the first outlet pipe 20. When the on-off valve 40 is closed, the exhaust gas flows to the second outlet pipe 30, and the exhaust gas cannot flow through the first outlet pipe 20. When the on-off valve 40 is opened, the exhaust gas flows to the first outlet pipe 20 and the second outlet pipe 30; or, the on-off valve 40 is arranged on the second outlet pipe 30; or, there are two on-off valves 40, and the two on-off valves 40 are respectively arranged on the first outlet pipe 20 and the second outlet pipe 30. The specific working conditions are similar to the case where the on-off valve 40 is arranged on the first outlet pipe 20, and will not be repeated here.

[0044] In the related art, the engine is the main noise source of the car when it is running. The exhaust system is one of the main noise reduction components for reducing the engine noise and is very useful for controlling the engine noise. The exhaust system includes a muffler and an exhaust tail pipe connected to the muffler.

[0045] In some hybrid models, the muffler is located above the frame at the rear suspension, so the exhaust tail pipe cannot extend to the rear bumper. The exhaust tail pipe is short, and when the engine is running at low load, the problem of low-frequency noise is more serious.

[0046] In the embodiment of the utility model, the diameter of the first outlet pipe 20 is set to be smaller than the diameter of the second outlet pipe 30. When the engine is running at a low load, the exhaust gas is controlled to flow through the first outlet pipe 20, the expansion ratio and the transmission loss are increased, the silencing effect is improved, and the problem of low-frequency noise is improved.

[0047] For example, the on-off valve 40 is arranged on the second outlet pipe 30. When the engine is running at a low load, the on-off valve 40 is closed, and the muffler 10 discharges the exhaust gas to the first outlet pipe 20. By utilizing the smaller diameter characteristic of the first outlet pipe 20, the problem of low-frequency noise is better improved. When the engine is running at a high load, the on-off valve 40 is opened, and the muffler 10 discharges the exhaust gas to the first outlet pipe 20 and the second outlet pipe 30. The double outlet pipes can distribute the flow and effectively attenuate the airflow noise. Alternatively, the on-off valve 40 is respectively arranged on the first outlet pipe 20 and the second outlet pipe 30. When the engine is running at a low load, the on-off valve 40 on the second outlet pipe 30 is closed, and the on-off valve 40 on the first outlet pipe 30 is closed. The on-off valve 40 on the air pipe 20 is opened, and the muffler 10 discharges the exhaust gas to the first outlet pipe 20. The smaller diameter of the first outlet pipe 20 is used to improve the problem of low-frequency noise. When the engine is running at high load, the two on-off valves 40 are opened, and the muffler 10 discharges the exhaust gas to the first outlet pipe 20 and the second outlet pipe 30. The double outlet pipes can distribute the flow and effectively attenuate the airflow noise; or, the on-off valve 40 is set on the first outlet pipe 20. When the engine is running at low load, the on-off valve 40 is opened, and the muffler 10 discharges the exhaust gas to the first outlet pipe 20. The smaller diameter of the first outlet pipe 20 is used to improve the problem of low-frequency noise.

[0048] According to the exhaust device 100 of the embodiment of the utility model, by setting the diameter of the first outlet pipe 20 to be smaller than the diameter of the second outlet pipe 30, when the engine is running at a low load, the exhaust gas flow is controlled to flow through the first outlet pipe 20, thereby increasing the expansion ratio and transmission loss, improving the silencing effect, and thus improving the problem of low-frequency noise.

[0049] Reference Figure 1 As shown, in some embodiments, the first air outlet pipe 20 and the second air outlet pipe 30 are arranged on different sides of the muffler 10 .

[0050] Among them, the first silencer 10 and the second silencer 10 are respectively arranged at different positions of the silencer 10, for example, the first air outlet pipe 20 is arranged on the left side of the silencer 10, and the second air outlet pipe 30 is arranged on the right side of the silencer 10; or, the first air outlet pipe 20 is arranged on the right side of the silencer 10, and the second air outlet pipe 30 is arranged on the left side of the silencer 10; or, the first air outlet pipe 20 is arranged on the upper side of the silencer 10, and the second air outlet pipe 30 is arranged on the lower side of the silencer 10; or, the first air outlet pipe 20 is arranged on the lower side of the silencer 10, and the second air outlet pipe 30 is arranged on the lower side of the silencer 10. The two air outlet pipes 30 are arranged on the upper side of the silencer 10; or, the first air outlet pipe 20 is arranged on the left side of the silencer 10, and the second air outlet pipe 30 is arranged on the upper side of the silencer 10; or, the first air outlet pipe 20 is arranged on the left side of the silencer 10, and the second air outlet pipe 30 is arranged on the lower side of the silencer 10; or, the first air outlet pipe 20 is arranged on the right side of the silencer 10, and the second air outlet pipe 30 is arranged on the upper side of the silencer 10; or, the first air outlet pipe 20 is arranged on the right side of the silencer 10, and the second air outlet pipe 30 is arranged on the lower side of the silencer 10.

[0051] In the above embodiment, by arranging the first air outlet pipe 20 and the second air outlet pipe 30 on different sides of the muffler 10, the peripheral space of the muffler 10 is fully utilized to avoid concentration, thereby facilitating assembly. At the same time, arranging the first air outlet pipe 20 and the second air outlet pipe 30 on different sides can make the length of the first air outlet pipe 20 longer, which can further improve the attenuation effect of low-frequency noise.

[0052] Reference Figure 1 As shown, in some embodiments, the silencer 10 has a first side surface 12 and a second side surface 13, the first side surface 12 and the second side surface 13 are arranged opposite to each other, the air inlet 11 is arranged on the first side surface 12, the first air outlet pipe 20 is arranged on the first side surface 12, the second air outlet pipe 30 is arranged on the second side surface 13, and the first air outlet pipe 20 extends toward the second air outlet pipe 30.

[0053] Among them, the first side surface 12 and the second side surface 13 are two opposite sides on the silencer 10, the first air outlet pipe 20 is arranged on the first side surface 12, and the second air outlet pipe 30 is arranged on the second side surface 13, that is, the first air outlet pipe 20 and the second air outlet pipe 30 are arranged on opposite sides of the silencer 10.

[0054] Specifically, the first air outlet pipe 20 is arranged on the first side surface 12, that is, one end of the first air outlet pipe 20 is installed on the first side surface 12, the first air outlet pipe 20 can extend in any direction, and the other end of the first air outlet pipe 20 can extend to the second side surface 13; the second air outlet pipe 30 is arranged on the second side surface 13, that is, one end of the second air outlet pipe 30 is installed on the second side surface 13, the second air outlet pipe 30 can extend in any direction, the other end of the second air outlet pipe 30 can extend in a direction away from the first side surface 12, or can extend to the second side surface 13.

[0055] In the above solution, the first air outlet pipe 20 and the second air outlet pipe 30 are arranged on opposite sides of the muffler 10 , and the first air outlet pipe 20 is arranged to extend toward the second air outlet pipe 30 , so that the first air outlet pipe 20 is longer.

[0056] According to the tail pipe silencer theoretical model f=c / 4L, L is the pipe length, c is the speed of sound, the longer L is, the lower the frequency is, and the better the effect of attenuating low-frequency noise is. The embodiment of the utility model improves the problem of low-frequency ear pressure and the problem of low-frequency noise by increasing the length of the first outlet pipe 20.

[0057] Reference Figures 7 to 10 As shown, Figures 7 to 10 In the figure, the horizontal axis is the engine speed, and the vertical axis is the noise level. 1.5-NO-EAV means Figure 6 The improvement effect of the exhaust system on 1.5-order noise, 3.0-NO-EAV Figure 6 The improvement effect of the exhaust system on 3.0-order noise, 4.5-NO-EAV Figure 6 The improvement effect of the exhaust system on 4.5-level noise, 6.0-NO-EAV Figure 6 The improvement effect of the exhaust system on the 6.0-order noise, 1.5-EAV-COLSE represents the ... Figure 1 The improvement effect of the exhaust device 100 on the 1.5-order noise when the on-off valve 40 is closed, 3.0-EAV-COLSE represents the improvement effect of the exhaust device 100 on the 1.5-order noise in the embodiment of the utility model. Figure 1 The improvement effect of the exhaust device 100 on the 3.0-order noise when the on-off valve 40 is closed, 4.5-EAV-COLSE represents the improvement effect of the exhaust device 100 on the 3.0-order noise in the embodiment of the utility model. Figure 1 The improvement effect of the exhaust device 100 on the 4.5-order noise when the on-off valve 40 is closed, 6.0-EAV-COLSE represents the improvement effect of the exhaust device 100 on the 4.5-order noise in the embodiment of the utility model. Figure 1 The improvement effect of the exhaust device 100 on the 6.0-order noise when the on-off valve 40 is closed, 1.5-EAV-OPEN represents the improvement effect of the exhaust device 100 on the 6.0-order noise when the on-off valve 40 is closed. Figure 1 The improvement effect of the exhaust device 100 on the 1.5-order noise when the on-off valve 40 is opened, 3.0-EAV-OPEN represents the improvement effect of the exhaust device 100 on the 1.5-order noise when the on-off valve 40 is opened. Figure 1 The improvement effect of the exhaust device 100 on the 3.0-order noise when the on-off valve 40 is opened, 4.5-EAV-OPEN represents the improvement effect of the exhaust device 100 on the 3.0-order noise when the on-off valve 40 is opened. Figure 1 The improvement effect of the exhaust device 100 on the 4.5-order noise when the on-off valve 40 is opened, 6.0-EAV-OPEN represents the improvement effect of the exhaust device 100 on the 4.5-order noise in the embodiment of the utility model. Figure 1The improvement effect of the exhaust device 100 on the 6.0-order noise when the on-off valve 40 is open. It can be seen that in the embodiment of the utility model, when the engine is running at low load, the muffler 10 discharges the exhaust gas to the first outlet pipe 20, and the small diameter of the first outlet pipe 20 is used to improve the problem of low-frequency noise. When the engine is running at high load, the muffler 10 discharges the exhaust gas to the first outlet pipe 20 and the second outlet pipe 30. The double outlet pipes can distribute the flow and effectively attenuate the airflow noise.

[0058] Reference Figure 1 As shown, in some embodiments, the first air outlet pipe 20 includes: an arc portion 21 and an extension portion 22 .

[0059] The arc portion 21 is disposed on the first side surface 12 . One end of the extension portion 22 is connected to the arc portion 21 , and the other end extends toward the second air outlet pipe 30 .

[0060] The arc-shaped arc portion 21 is disposed on the first side surface 12 , one end of the arc portion 21 is mounted on the first side surface 12 , and the other end of the arc portion 21 is connected to the extension portion 22 , which extends toward the second air outlet pipe 30 .

[0061] In the above embodiment, by setting the arc portion 21 and the extension portion 22, the arc portion 21 is bent in an arc shape to avoid corners, so that the exhaust gas flows smoothly and avoids noise. At the same time, the setting of the arc portion 21 makes the overall length longer, and the first exhaust pipe 20 is longer. According to the tail pipe silencer theoretical model f=c / 4L, L is the pipe length, c is the speed of sound, the longer L is, the lower the frequency is, and the effect of attenuating low-frequency noise is better. The embodiment of the utility model improves the problem of low-frequency noise by increasing the length of the first exhaust pipe 20.

[0062] Reference Figure 2 , Figure 3 As shown, in some embodiments, the on-off valve 40 includes: a baffle 41 and a driving member 42 .

[0063] The baffle 41 is movably disposed in the first air outlet pipe 20 and / or the second air outlet pipe 30 to open and close the first air outlet pipe 20 and / or the second air outlet pipe 30. The driving member 42 is disposed outside the first air outlet pipe 20 and / or the second air outlet pipe 30, and the driving member 42 is connected to the baffle 41 to drive the baffle 41 to move.

[0064] The first air outlet pipe 20 and the second air outlet pipe 30 are both hollow pipe structures, and the baffle 41 is arranged in the first air outlet pipe 20 or the second air outlet pipe 30. The baffle 41 can be moved to block the first air outlet pipe 20 or the second air outlet pipe 30, so that the exhaust gas cannot flow. The baffle 41 can also be moved to a certain distance from the inner wall of the pipe, so that the exhaust gas flows. The driving member 42 connected to the baffle 41 is arranged outside the first air outlet pipe 20 or the second air outlet pipe 30, and the driving member 42 provides power for the baffle 41 to make the baffle 41 move.

[0065] In the above embodiment, by setting the baffle 41 in the first air outlet pipe 20 or the second air outlet pipe 30 and setting the driving member 42 outside the first air outlet pipe 20 or the second air outlet pipe 30, the interference to the driving member 42 is reduced, and the overall reliability is improved. At the same time, the overall structure is simple and the method is more reliable.

[0066] Specifically, the baffle 41 can be configured as a rotating member, which is rotatably disposed in the first air outlet pipe 20 or the second air outlet pipe 30 . The rotating member can rotate with its own midline as the rotation axis, or flip with a certain point on itself as the base point.

[0067] In some specific embodiments, the baffle 41 is arranged in the first air outlet pipe 20, and the driving member 42 is correspondingly arranged outside the first air outlet pipe 20; in other specific embodiments, the baffle 41 is arranged in the second air outlet pipe 30, and the driving member 42 is correspondingly arranged outside the second air outlet pipe 30; in some other embodiments, baffles 41 are respectively arranged in the first air outlet pipe 20 and the second air outlet pipe 30, and driving members 42 are correspondingly arranged outside the first air outlet pipe 20 and the second air outlet pipe 30.

[0068] In other embodiments, the on-off valve 40 is configured as a ball valve or a butterfly valve.

[0069] In some embodiments, the on-off valve 40 is installed on the second air outlet pipe 30 .

[0070] The diameter of the second air outlet pipe 30 is greater than that of the first air outlet pipe 20 , and the volume of the second air outlet pipe 30 is relatively large. The on-off valve 40 is installed on the larger second air outlet pipe 30 .

[0071] In the above embodiment, the on-off valve 40 is arranged on the larger second air outlet pipe 30 and the on-off valve 40 is installed by utilizing the larger volume of the second air outlet pipe 30 , thereby providing a larger space for the installation of the on-off valve 40 and facilitating the installation.

[0072] Reference Figure 1 As shown, in some embodiments, a muffler pipe 23 is provided on the first air outlet pipe 20 and / or the second air outlet pipe 30, and the muffler pipe 23 has a muffler space to reduce noise.

[0073] The silencer pipe 23 has a silencer space, which exerts a silencer effect. The silencer space is arranged on the first outlet pipe 20 or the second outlet pipe 30, and the exhaust gas flows through the silencer space, thereby further improving the noise problem.

[0074] In the above embodiment, by arranging the muffler pipe 23 on the first air outlet pipe 20 or the second air outlet pipe 30 , the noise problem is improved by utilizing the muffler space in the muffler pipe 23 .

[0075] For example, the silencer pipe 23 is disposed on the first air outlet pipe 20 ; or, the silencer pipe 23 is disposed on the second air outlet pipe 30 ; or, the silencer pipe 23 is disposed on the first air outlet pipe 20 and the second air outlet pipe 30 , respectively.

[0076] In some specific embodiments, a plurality of spaced partitions are provided in the sound-absorbing space, and a plurality of through holes are provided on the partitions to achieve a noise reduction effect.

[0077] Reference Figure 4 , Figure 5 As shown, in some specific embodiments, the muffler pipe 23 includes: an inner pipe 232 , an outer shell 233 and a muffler 10 .

[0078] The inner pipe 232 is connected to the first outlet pipe 20 and / or the second outlet pipe 30, and a flow hole connected to the sound-absorbing space is provided on the inner pipe 232. The outer shell 233 is placed on the inner pipe 232, and the outer shell 233 and the inner pipe 232 together define the sound-absorbing space. The sound-absorbing member is provided in the sound-absorbing space, and the sound-absorbing member includes a polyester fiber member and / or a polyurethane member.

[0079] The muffler pipe 23 is a double-layer structure, the space between the double-layer structure is a muffler space, the sound absorbing member is filled in the muffler space, and the sound absorbing member exerts a muffler effect. The inner pipe 232 is connected to the first outlet pipe 20 or the second outlet pipe 30, and a flow hole is opened on the inner pipe 232, the flow hole is connected to the muffler space, and the exhaust gas flows to the muffler space through the flow hole when flowing through the inner pipe 232.

[0080] In the above embodiment, the sound-absorbing space is defined by the cooperation between the inner pipe 232 and the outer shell 233, and the sound-absorbing element is filled in the sound-absorbing space, which further improves the sound-absorbing effect and improves the noise problem.

[0081] For example, the polyester fiber piece is polyester fiber foam or polyester fiber cotton, and the polyurethane piece is polyurethane foam.

[0082] In some specific embodiments, the diameter of the second air outlet pipe 30 is 75.6 mm, the diameter of the first air outlet pipe 20 is 60 mm, and the diameter of the first air outlet pipe 20 is smaller than the diameter of the second air outlet pipe 30 .

[0083] The vehicle according to the embodiment of the present utility model includes the exhaust device 100 mentioned above.

[0084] According to the vehicle of the embodiment of the utility model, by setting the diameter of the first outlet pipe 20 to be smaller than the diameter of the second outlet pipe 30, when the engine is running at a low load, the exhaust gas flow is controlled to flow through the first outlet pipe 20, thereby increasing the expansion ratio and the transmission loss, improving the silencing effect, and thus improving the problem of low-frequency noise.

[0085] In some embodiments, a vehicle includes: a body and wheels.

[0086] One end of the vehicle body is configured as the rear of the vehicle. The wheels are arranged on the vehicle body. The first air outlet pipe 20 has a first air outlet 24, and the second air outlet pipe 30 has a second air outlet 31. The first air outlet 24 and the second air outlet 31 are arranged between the rear of the vehicle and the wheels.

[0087] The first air outlet pipe 20 and the second air outlet pipe 30 are relatively short, which are suitable for hybrid vehicles in which the battery is arranged above the frame at the rear suspension. The first air outlet pipe 20 and the second air outlet pipe 30 extend between the rear of the vehicle and the wheels.

[0088] In some specific embodiments, the wheels include front wheels and rear wheels, the rear wheels are arranged on a side of the front wheels close to the rear of the vehicle, and the first air outlet 24 and the second air outlet 31 are arranged between the rear of the vehicle and the rear wheels.

[0089] In some specific embodiments, compared with the distances from the rear of the vehicle, the first air outlet 24 and the second air outlet 31 are closer to the wheels, and the first air outlet pipe 20 and the second air outlet pipe 30 are shorter.

[0090] In some specific embodiments, the first air outlet 24 is spaced apart from the rear of the vehicle, and the second air outlet 31 is spaced apart from the rear of the vehicle.

[0091] 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.

[0092] 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. An exhaust device for a vehicle, characterized in that: include: A muffler (10), wherein the muffler (10) is provided with an air inlet (11), and the air inlet (11) is used to communicate with an exhaust port of an engine; a first air outlet pipe (20) and a second air outlet pipe (30), wherein the first air outlet pipe (20) and the second air outlet pipe (30) are respectively arranged on the muffler (10), and the diameter of the first air outlet pipe (20) is smaller than the diameter of the second air outlet pipe (30); An on-off valve (40), the on-off valve (40) being arranged on at least one of the first air outlet pipe (20) and the second air outlet pipe (30) to control the on-off of the first air outlet pipe (20) and / or the second air outlet pipe (30).

2. The exhaust device for a vehicle according to claim 1, characterized in that: The first air outlet pipe (20) and the second air outlet pipe (30) are arranged on different sides of the muffler (10).

3. The exhaust device for a vehicle according to claim 2, characterized in that: The silencer (10) has a first side surface (12) and a second side surface (13), the first side surface (12) and the second side surface (13) are arranged opposite to each other, the air inlet (11) is arranged on the first side surface (12), the first air outlet pipe (20) is arranged on the first side surface (12), the second air outlet pipe (30) is arranged on the second side surface (13), and the first air outlet pipe (20) extends toward the second air outlet pipe (30).

4. The exhaust device for a vehicle according to claim 3, characterized in that: The first air outlet pipe (20) comprises: an arc-shaped portion (21), the arc-shaped portion (21) being arranged on the first side surface (12); An extension portion (22), one end of the extension portion (22) being connected to the arc-shaped portion (21), and the other end of the extension portion (22) extending toward the second air outlet pipe (30).

5. The exhaust device for a vehicle according to claim 1, characterized in that: The on-off valve (40) comprises: a baffle (41), the baffle (41) being movably disposed in the first air outlet pipe (20) and / or the second air outlet pipe (30) so as to open and close the first air outlet pipe (20) and / or the second air outlet pipe (30); A driving member (42), wherein the driving member (42) is arranged outside the first air outlet pipe (20) and / or the second air outlet pipe (30), and the driving member (42) is connected to the baffle (41) to drive the baffle (41) to move.

6. The exhaust device for a vehicle according to claim 5, characterized in that: The on-off valve (40) is installed on the second air outlet pipe (30).

7. The exhaust device for a vehicle according to claim 1, characterized in that: The first air outlet pipe (20) and / or the second air outlet pipe (30) is provided with a muffler pipe (23), and the muffler pipe (23) has a muffler space to reduce noise.

8. The exhaust device for a vehicle according to claim 7, characterized in that: The muffler pipe (23) comprises: an inner pipe (232), the inner pipe (232) being connected to the first air outlet pipe (20) and / or the second air outlet pipe (30), and the inner pipe (232) being provided with a flow hole connected to the silencing space; An outer shell (233), the outer shell (233) being disposed outside the inner pipe (232), and the outer shell (233) and the inner pipe (232) jointly define the sound-absorbing space; A sound absorbing member is arranged in the sound-absorbing space, and the sound absorbing member includes a polyester fiber member and / or a polyurethane member.

9. A vehicle, characterized in that: An exhaust device (100) comprising any one of claims 1 to 8.

10. The vehicle according to claim 9, characterized in that The vehicle further comprises: A vehicle body, one end of which is configured as a vehicle tail; Wheels, the wheels are arranged on the vehicle body; wherein, The first air outlet pipe (20) has a first air outlet (24), the second air outlet pipe (30) has a second air outlet (31), and the first air outlet (24) and the second air outlet (31) are arranged between the rear end of the vehicle and the wheel.

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