Integrated exhaust hush pipe

Abstract

The utility model provides an integrated exhaust hush pipe. The integrated exhaust hush pipe comprises a valve body assembly and an insertion pipe assembly which are connected with each other, the valve body assembly comprises a valve body and a downstream pipeline; a valve plate, a first circular interface and a second circular interface are arranged on the valve body; the first circular connector is used for being connected with an outlet of an upstream pipeline, and the second circular connector is used for being connected with an inlet of a downstream pipeline. The insert pipe assembly comprises a main pipeline and an insert plate; the insertion plate is arranged in the main pipeline and divides an inner cavity of the main pipeline into a first channel and a second channel; the inlet end of the main pipeline is inserted into the downstream pipeline; a sealing end cover is arranged at the inlet end of the main pipeline and is used for sealing one end of the first channel; one end of the second channel is communicated with the downstream pipeline, and the other end of the second channel is communicated with the other end of the first channel; and a circulating hole communicated with the first channel is formed in the pipe wall of the main pipeline. The exhaust system silencer solves the problem that exhaust noise is too large due to the fact that the volume of the exhaust system silencer is insufficient.

Description

Technical Field

[0001] This utility model relates to the field of vehicle exhaust technology, specifically to an integrated exhaust muffler. Background Technology

[0002] With the rapid development and popularization of lightweight and electrification concepts in vehicle design, the muffler volume of the exhaust system has been greatly reduced, resulting in insufficient muffler volume, especially in the low-frequency noise section, where the volume reduction is difficult to meet the previous performance requirements.

[0003] Existing automotive exhaust systems typically consist of the following parts: a) Exhaust connection pipe: connected to the engine's exhaust system, used to expel high-temperature exhaust gases; b) Connecting sleeve: equipped with an oil-impregnated asbestos sealing ring to prevent air leakage at the interface; c) Muffler: the outer shell forms its outer contour boundary, with internal baffles and muffler pipes welded in, dividing the muffler into various muffler chambers (such as expansion chambers and resonance chambers); d) Muffler pipe: the internal pipes of the muffler, used to handle the airflow within the muffler and construct a specific muffler structure; e) Baffle: has inverted triangular guide grooves and many small holes to disperse airflow; f) Porous pipe: used to reduce airflow velocity and reduce noise; g) Outer shell: usually made of stainless steel to protect the internal structure.

[0004] However, the existing automotive exhaust systems have the following drawbacks: a) Limited noise reduction effect: Existing exhaust mufflers are effective at reducing low and mid-frequency noise, but less effective at reducing high-frequency noise; b) Large size: Due to the need for multiple expansion chambers and resonance cavities, the muffler is large in size and weight, increasing the burden on the vehicle; c) Exhaust back pressure problem: The complex internal structure may lead to high exhaust back pressure, affecting the engine's power output; d) The internal structure layout of the muffler is limited by the muffler's outer contour: A smaller outer contour of the muffler often makes it impossible to arrange the internal noise reduction structure or increases manufacturing costs.

[0005] The differences between this utility model and the existing automotive exhaust systems are as follows: a) This utility model centrally houses the muffler structure within a single muffler pipe, reducing the waste of muffler volume and installation difficulties caused by dispersed pipe layout within the muffler; b) This utility model enables variable cross-sectional area technology for the muffler pipe, reducing the cost of this technology by 90%; c) Applying the structure of this utility model can reduce the volume of existing mufflers by 30%, achieving cost reduction and weight reduction requirements; d) This utility model has low-frequency muffler volume, increasing it by 5-10 dB compared to existing mufflers; e) The integrated exhaust muffler pipe of this utility model is compatible with all types of external contour mufflers, simplifying the structure and facilitating installation. Utility Model Content

[0006] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide an integrated exhaust muffler.

[0007] An integrated exhaust muffler pipe according to the present invention includes: a valve body assembly and an insertion pipe assembly connected to each other;

[0008] The valve assembly includes: a valve body and a downstream pipeline; the valve body is provided with a valve plate, a first circular interface and a second circular interface;

[0009] The first circular interface is used to connect to the outlet of the upstream pipeline, and the second circular interface is used to connect to the inlet of the downstream pipeline;

[0010] The insertion tube assembly includes: a main pipeline and an insertion plate; the insertion plate is disposed within the main pipeline, dividing the inner cavity of the main pipeline into a first channel and a second channel;

[0011] The inlet end of the main pipeline is inserted into the downstream pipeline; the inlet end of the main pipeline is provided with a sealing end cap, which is used to close one end of the first channel;

[0012] One end of the second channel is connected to the downstream pipeline, and the other end of the second channel is connected to the other end of the first channel;

[0013] The main pipeline has a flow hole on its wall that communicates with the first channel.

[0014] Preferably, the flow hole is located near the inlet end of the main pipeline.

[0015] Preferably, the first channel is not connected to the downstream pipeline at the inlet end of the main pipeline;

[0016] The second channel is connected to the downstream pipeline at the inlet end of the main pipeline.

[0017] Preferably, the first channel and the second channel are not connected at the entrance end of the main road;

[0018] The first channel and the second channel are connected at a location adjacent to the exit end of the main road.

[0019] Preferably, the cross-sectional area of ​​the first channel is larger than that of the second channel.

[0020] Preferably, the valve body further includes: a first annular portion and a second annular portion integrally formed;

[0021] The axis of the first ring portion and the axis of the second ring portion are parallel, the first ring portion forms the first circular interface, and the second ring portion forms the second circular interface;

[0022] The diameter of the second circular interface is larger than the diameter of the first circular interface;

[0023] A mounting base is provided on the first annular portion, and the valve plate is mounted on the mounting base by an elastic component, and the valve plate can be rotated on the mounting base.

[0024] Preferably, the valve body further includes: a shaft, a spring, a first end cap, and a second end cap;

[0025] The first end cap and the second end cap are mounted on the mounting base; one end of the shaft is rotatably connected to the first end cap through a first bearing, and the other end of the shaft passes through the second end cap, and the second end cap is rotatably connected to the shaft through a second bearing;

[0026] A spring retainer is provided at the other end of the shaft, and the spring is sleeved on the shaft and located between the spring retainer and the second end cover; one end of the spring is connected to the shaft, and the other end of the spring is connected to the mounting base;

[0027] The valve plate is provided with a connecting seat that is connected to the shaft, and the connecting seat is located between the first end cover and the second end cover;

[0028] The valve plate can be flipped on the valve body via the shaft, and the spring is used to provide a reverse torque to limit the flipping of the valve plate.

[0029] Preferably, in the initial state, the valve plate closes the connection through hole between the first circular interface and the second circular interface;

[0030] When the pressure difference between the outlet of the upstream pipeline and the inlet of the downstream pipeline is greater than or equal to a preset value, the valve plate flips open, and the first circular interface and the second circular interface are connected.

[0031] When the pressure difference between the outlet of the upstream pipeline and the inlet of the downstream pipeline is less than a preset value, the valve plate is closed by flipping the elastic component, and the first circular interface and the second circular interface are not connected.

[0032] Preferably, a shock-absorbing pad is provided on the valve body at a position corresponding to the valve plate;

[0033] The shock-absorbing pad is disposed on the second annular portion and located between the valve plate and the valve body, and is used to buffer the impact and abnormal noise caused when the valve plate falls.

[0034] Preferably, the connecting through hole is located at the connection position between the first annular portion and the second annular portion;

[0035] In its initial state, the valve plate can completely cover the connection through hole, cutting off the connection between the first circular interface and the second circular interface.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. This utility model utilizes an insertion tube connected to the downstream pipeline to divide the pipeline inside the insertion tube into two different channels. The flow of one channel is controlled by opening and closing the valve body, while the other channel has a flow hole on the pipe wall as a normally open channel. Therefore, when the valve is closed, only the normally open channel can circulate air and transmit sound, which can significantly reduce engine low-speed noise and improve the NVH performance of the whole vehicle.

[0038] 2. The integrated muffler of this utility model innovatively arranges all the muffler elements in one pipe, which occupies little space and has strong spatial adaptability. The integrated exhaust muffler can be arranged regardless of the outer contour of the muffler. Attached Figure Description

[0039] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0040] Figure 1 This is a schematic diagram of the integrated exhaust muffler pipe of this utility model installed in the vehicle pipeline;

[0041] Figure 2 for Figure 1 A magnified view of part A in the diagram;

[0042] Figure 3 To highlight the integrated exhaust muffler Figure 2 A magnified view of part B in the diagram;

[0043] Figure 4 This is a schematic diagram of the insertion tube assembly;

[0044] Figure 5 This is a schematic diagram of the valve body assembly.

[0045] Figure 6 This is an exploded view of the valve body assembly;

[0046] Figure 7 Top view of the insertion tube assembly Figure 1 ;

[0047] Figure 8 This is a cross-sectional schematic diagram of the insertion tube assembly;

[0048] Figure 9 This is a three-dimensional structural diagram of the insertion tube assembly;

[0049] Figure 10 for Figure 9 A schematic diagram along direction C;

[0050] Figure 11 for Figure 9 A schematic diagram along direction D;

[0051] Figure 12 Top view of the insertion tube assembly Figure 2 ;

[0052] Figure 13 for Figure 12 Schematic diagram of the cross-sectional structure along line BB;

[0053] Figure 14 Schematic diagram of the three-dimensional structure of the valve body assembly Figure 1 ;

[0054] Figure 15 Schematic diagram of the three-dimensional structure of the valve body assembly Figure 2 ;

[0055] Figure 16 This is an exploded view of the valve body assembly;

[0056] Figure 17 This is a plan view of the valve body assembly;

[0057] Figure 18 for Figure 17 Schematic diagram of the structure along line AA;

[0058] Figure 19 for Figure 17 Schematic diagram of the structure along line BB;

[0059] Figure 20 Schematic diagram of the three-dimensional structure of the valve body assembly Figure 3 ;

[0060] Figure 21 This is a schematic diagram comparing acoustic and back pressure results in an application case.

[0061] Figure 22 This is a schematic diagram comparing the structure of solutions in an application case.

[0062] The diagram shows:

[0063] Valve body 1 Valve body assembly 13

[0064] Shaft 2 Insert tube assembly 14

[0065] Spring 3 Main pipe 1401

[0066] First end cap 4 Insert plate 1402

[0067] Second end cap 5 First channel 1403

[0068] Valve plate 6, second channel 1404

[0069] Mounting base 7 Sealing end cap 1405

[0070] First bearing 8, flow hole 1406

[0071] Second bearing 9, inlet end 1407

[0072] Spring plate 10, outlet end 1408

[0073] Connector 11 Downstream Pipeline 15

[0074] 12 shock-absorbing pads Detailed Implementation

[0075] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0076] Example 1

[0077] like Figures 1 to 20 As shown, this embodiment provides an integrated exhaust muffler pipe, including: a valve body assembly 13 and an insertion pipe assembly 14 connected to each other; the valve body assembly 13 includes: a valve body 1 and a downstream pipe 15; the valve body 1 is provided with a valve plate 6, a first circular interface 101 and a second circular interface 102; the first circular interface 101 is used to connect to the outlet of the upstream pipe, and the second circular interface 102 is used to connect to the inlet of the downstream pipe 15; the insertion pipe assembly 14 includes: a main pipe 1401 and an insertion plate 1402; the insertion plate 1402 is disposed inside the main pipe 1401. The inner cavity of the main pipeline 1401 is divided into a first channel 1403 and a second channel 1404; the inlet end of the main pipeline 1401 is inserted into the downstream pipeline 15; the inlet end of the main pipeline 1405 is provided with a sealing end cap 1405, which is used to close one end of the first channel 1403; one end of the second channel 1404 is connected to the downstream pipeline 15, and the other end of the second channel 1404 is connected to the other end of the first channel 1403; a flow hole 1406 connected to the first channel 1403 is provided on the pipe wall of the main pipeline 1401.

[0078] The valve body 1 further includes: a first annular portion 103 and a second annular portion 104 integrally formed; the axis of the first annular portion 103 and the axis of the second annular portion 104 are parallel; a first circular interface 101 is formed on the first annular portion 103 and a second circular interface 102 is formed on the second annular portion 104; the diameter of the second circular interface 102 is larger than the diameter of the first circular interface 101; a mounting seat 7 is provided on the first annular portion 103, and the valve plate 6 is mounted on the mounting seat 7 through an elastic component, and the valve plate 6 can be rotated on the mounting seat 7.

[0079] A flow-through orifice 1406 is located adjacent to the inlet end 1407 of the main pipeline 1401. The first channel 1403 is not connected to the downstream pipeline 15 at the inlet end of the main pipeline 1401; the second channel 1404 is connected to the downstream pipeline 15 at the inlet end of the main pipeline 1401. The first channel 1403 and the second channel 1404 are not connected at the inlet end of the main pipeline 1401; however, they are connected adjacent to the outlet end 1408 of the main pipeline 1401. The cross-sectional area of ​​the first channel 1403 is larger than that of the second channel 1404.

[0080] In the initial state, valve plate 6 closes the connection through hole between the first circular interface 101 and the second circular interface 102; when the pressure difference between the outlet of the upstream pipeline and the inlet of the downstream pipeline is greater than or equal to a preset value, valve plate 6 flips open, and the first circular interface 101 and the second circular interface 102 are connected; when the pressure difference between the outlet of the upstream pipeline and the inlet of the downstream pipeline is less than the preset value, valve plate 6 flips closed through the elastic component, and the first circular interface 101 and the second circular interface 102 are not connected.

[0081] The valve body 1 also includes: a shaft 2, a spring 3, a first end cover 4, and a second end cover 5; the first end cover 4 and the second end cover 5 are mounted on the mounting base 7; one end of the shaft 2 is rotatably connected to the first end cover 4 via a first bearing 8, and the other end of the shaft 2 passes through the second end cover 5, which is rotatably connected to the shaft 2 via a second bearing 9; a spring retainer 10 is provided at the other end of the shaft 2, and the spring 3 is sleeved on the shaft 2 and located between the spring retainer 10 and the second end cover 5; one end of the spring 3 is connected to the shaft 2, and the other end of the spring 3 is connected to the mounting base 7; a connecting seat 11 connected to the shaft 2 is provided on the valve plate 6, and the connecting seat 11 is located between the first end cover 4 and the second end cover 5; the valve plate 6 can be flipped on the valve body 1 via the shaft 2, and the spring 3 is used to provide a reverse torque to limit the flipping of the valve plate 6.

[0082] A shock-absorbing pad 12 is provided on the valve body 1 at the position corresponding to the valve plate 6; the shock-absorbing pad 12 is provided on the second annular portion 104 and located between the valve plate 6 and the valve body 1, and is used to buffer the knocking and abnormal noise caused when the valve plate 6 falls. A connecting through hole is provided at the connection position of the first annular portion 103 and the second annular portion 104; in the initial state, the valve plate 6 can completely cover the connecting through hole, cutting off the communication between the first circular interface 101 and the second circular interface 102.

[0083] Example 2

[0084] Those skilled in the art can understand this embodiment as a more specific description of Embodiment 1.

[0085] This embodiment provides an integrated exhaust muffler, the main structures of which are: a mini valve assembly and an insertion pipe assembly.

[0086] The mini valve assembly consists of a mini valve and a downstream pipeline. The insert pipe assembly consists of a main pipeline and an insert plate.

[0087] The insertion plate of the insertion tube assembly divides the main pipeline into upper and lower channels. The left side of the upper channel is sealed by a kneading process, while the right side is unobstructed. A flow hole is opened at the end of the main pipeline wall. The lower channel is unobstructed on both the left and right sides.

[0088] The mini valve assembly is installed on the left side of the insertion tube. In its free state, it is normally closed, and the lower channel is closed at this time, so no airflow is allowed.

[0089] When the external pressure on the valve plate is greater than the preload, the valve opens, and the lower passage is unobstructed, allowing airflow.

[0090] Working principle:

[0091] a. When the mini valve is closed, the upper channel is unobstructed and the lower channel is closed. Airflow and sound enter the upper channel through the bypass hole and propagate downstream along the upper channel.

[0092] b. Because the equivalent cross-sectional area of ​​the upper channel is smaller than that of the main channel, the amplitude of sound wave pressure pulsation is smaller when sound propagates downstream through the upper channel than when it propagates directly along the main channel. Therefore, compared to propagation directly along the main channel,

[0093] c. When the mini valve is open, both the upper and lower channels are unobstructed, and airflow and sound can propagate downstream simultaneously along both channels.

[0094] d. As the lower channel opens, the equivalent flow area formed by the upper and lower channels increases, effectively reducing the airflow velocity in the main pipeline. After the flow velocity is reduced, the turbulence noise and jet noise generated in the pipeline are greatly reduced.

[0095] e. The opening and closing of the mini valve depends on the pressure difference between the upstream and downstream sides of the valve. When the engine is under low load conditions (such as slow acceleration, idling, and most urban driving conditions), the exhaust flow is small and insufficient to build up enough pressure to open the valve. At this time, the integrated muffler is in a highly efficient working state, with significant noise reduction performance.

[0096] f. When the engine is under high load (rapid acceleration at high throttle, high-speed driving), the exhaust flow increases, establishing a pressure difference sufficient to open the valve. At this time, the valve is opened, the flow area of ​​the integrated muffler increases, which is beneficial to airflow and can reduce air jet noise.

[0097] This embodiment solves the problem of excessive exhaust noise and noticeable booming noise inside the vehicle due to insufficient muffler volume in the exhaust system. The integrated muffler pipe can significantly improve the muffler's sound-dampening performance when the valve is closed, compensating for the deficiency of insufficient muffler volume.

[0098] This embodiment addresses the issue of excessive noise during idling charging in hybrid vehicles, which negatively impacts the driving experience. During idling charging, the engine workload is generally low, resulting in insufficient exhaust airflow and the inability to establish the back pressure required to open the valve. With the valve closed, idling charging noise can be significantly reduced, thus improving the driving experience.

[0099] This embodiment solves the problem of small exhaust muffler enclosure volume, making it difficult to arrange muffler structures within the muffler. The integrated exhaust muffler pipe has a compact structure and can be directly arranged as the inlet and outlet structure of the muffler enclosure, offering flexible layout and saving space.

[0100] This embodiment addresses the strong demands of automotive OEMs for cost reduction, weight reduction, and carbon emission reduction. By installing an integrated muffler, the muffler volume can be reduced and the internal muffler structure simplified, achieving muffler performance comparable to the original design. Reducing the rear muffler volume and simplifying the muffler structure achieves overall cost reduction, size reduction, weight reduction, and carbon emission reduction for the exhaust system.

[0101] This embodiment addresses the issue of redesigning the internal silencing structure of the exhaust system due to varying chassis layouts for different vehicle models. The integrated silencing pipe can quickly achieve excellent silencing performance and is adaptable to any chassis and silencing package shape, saving development time and costs.

[0102] Application Case 1: The integrated muffler pipe of this embodiment is used to optimize exhaust system performance. For example... Figure 21 The diagram shown is a comparison of acoustic and back pressure results.

[0103] During the development of an exhaust system for a certain vehicle model, a comparative analysis of the acoustic and back pressure performance of exhaust systems equipped with and without the rear muffler of this embodiment was conducted, leading to the following conclusions:

[0104] a. By applying the integrated silencer tube of this embodiment, the total order result at low speed is reduced by 12dB;

[0105] b. By applying the integrated silencer tube of this embodiment, the second-order result at low speed is reduced by 10dB;

[0106] c. When using the integrated muffler pipe of this embodiment, the back pressure value of the exhaust system does not increase.

[0107] Application Case 2: This embodiment uses an integrated muffler pipe for exhaust system cost optimization. For example... Figure 22 The diagram shown is a comparison of the structural designs. M represents the original muffler design, and N represents the muffler design using the structure of this embodiment.

[0108] In the process of optimizing the cost of an exhaust system for a specific vehicle model, the structural design of this embodiment can achieve the following benefits while meeting objective performance targets:

[0109] a. The volume of the rear muffler is reduced by 40%;

[0110] b. The cost of the rear muffler is reduced by 33%, and the total cost of the exhaust system is reduced by 8%;

[0111] c. The overall weight of the exhaust system is reduced by 5%.

[0112] The integrated exhaust muffler is an innovative silencing structure based on a mini muffler valve. Primarily used in exhaust system rear muffler design, it significantly improves performance in situations where muffler design space is limited and exhaust noise is excessive at low engine speeds. This embodiment utilizes the downstream insertion pipe to divide the pipeline into two different channels. The flow in one channel is controlled by the opening and closing of the mini valve, while the other channel has a flow hole in its wall for normal operation. Therefore, when the valve is closed, only the normal channel allows airflow and sound transmission, significantly reducing low-speed engine noise and improving overall vehicle NVH performance. The innovative integrated muffler design concentrates all silencing components in a single pipe, occupying minimal space and possessing strong spatial adaptability; the integrated exhaust muffler can be installed regardless of the muffler's external contour.

[0113] This invention solves the problem of excessive exhaust noise caused by insufficient volume of the muffler pack in the exhaust system.

[0114] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0115] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. An integrated exhaust silencer tube, characterized by, include: The valve body assembly (13) and the insertion tube assembly (14) are connected together. The valve body assembly (13) includes: a valve body (1) and a downstream pipeline (15); the valve body (1) is provided with a valve plate (6), a first circular interface (101) and a second circular interface (102). The first circular interface (101) is used to connect to the outlet of the upstream pipeline, and the second circular interface (102) is used to connect to the inlet of the downstream pipeline (15); The insertion tube assembly (14) includes: a main pipeline (1401) and an insertion plate (1402); the insertion plate (1402) is disposed in the main pipeline (1401) and divides the inner cavity of the main pipeline (1401) into a first channel (1403) and a second channel (1404). The inlet end of the main pipeline (1401) is inserted into the downstream pipeline (15); the inlet end of the main pipeline (1401) is provided with a sealing end cap (1405), which is used to close one end of the first channel (1403); One end of the second channel (1404) is connected to the downstream pipeline (15), and the other end of the second channel (1404) is connected to the other end of the first channel (1403); The main pipeline (1401) has a flow hole (1406) that communicates with the first channel (1403) on its pipe wall.

2. The integrated exhaust silencer of claim 1, wherein The flow hole (1406) is located near the inlet end of the main pipeline (1401).

3. The integrated exhaust silencer of claim 1, wherein, The first channel (1403) and the downstream pipeline (15) are not connected at the inlet end of the main pipeline (1401); The second channel (1404) is connected to the downstream pipeline (15) at the inlet end of the main pipeline (1401).

4. The integrated exhaust silencer of claim 1, wherein, The first channel (1403) and the second channel (1404) are not connected at the entrance end of the main road (1401); The first channel (1403) and the second channel (1404) are connected at the outlet end of the main road (1401).

5. The integrated exhaust silencer of claim 1, wherein, The cross-sectional area of ​​the first channel (1403) is larger than that of the second channel (1404).

6. The integrated exhaust silencer of claim 1, wherein, The valve body (1) further includes: a first annular portion (103) and a second annular portion (104) integrally formed; The axis of the first annular portion (103) is parallel to the axis of the second annular portion (104). The first circular interface (101) is formed on the first annular portion (103), and the second circular interface (102) is formed on the second annular portion (104). The diameter of the second circular interface (102) is larger than the diameter of the first circular interface (101); A mounting base (7) is provided on the first annular portion (103), and the valve plate (6) is mounted on the mounting base (7) by an elastic component. The valve plate (6) can be flipped on the mounting base (7).

7. The integrated exhaust silencer of claim 6, wherein, The valve body (1) also includes: a shaft (2), a spring (3), a first end cap (4), and a second end cap (5); The first end cap (4) and the second end cap (5) are mounted on the mounting base (7); one end of the shaft (2) is rotatably connected to the first end cap (4) through the first bearing (8), and the other end of the shaft (2) passes through the second end cap (5), and the second end cap (5) is rotatably connected to the shaft (2) through the second bearing (9); The other end of the shaft (2) is provided with a spring clip (10), and the spring (3) is sleeved on the shaft (2) and located between the spring clip (10) and the second end cover (5); one end of the spring (3) is connected to the shaft (2), and the other end of the spring (3) is connected to the mounting base (7); The valve plate (6) is provided with a connecting seat (11) connected to the shaft (2), and the connecting seat (11) is located between the first end cover (4) and the second end cover (5); The valve plate (6) can be flipped on the valve body (1) via the shaft (2), and the spring (3) is used to provide a reverse torque to limit the flipping of the valve plate (6).

8. The integrated exhaust muffler pipe according to claim 6, characterized in that, In the initial state, the valve plate (6) closes the connection through hole between the first circular interface (101) and the second circular interface (102); When the pressure difference between the outlet of the upstream pipeline and the inlet of the downstream pipeline is greater than or equal to a preset value, the valve plate (6) flips open, and the first circular interface (101) and the second circular interface (102) are connected; When the pressure difference between the outlet of the upstream pipeline and the inlet of the downstream pipeline is less than a preset value, the valve plate (6) is closed by flipping the elastic component, and the first circular interface (101) and the second circular interface (102) are not connected.

9. The integrated exhaust muffler pipe according to claim 6, characterized in that, A shock-absorbing pad (12) is provided on the valve body (1) at the position corresponding to the valve plate (6). The shock-absorbing pad (12) is disposed on the second annular portion (104) and located between the valve plate (6) and the valve body (1) to buffer the knocking and abnormal noise caused when the valve plate (6) falls.

10. The integrated exhaust silencer of claim 8, wherein, The connecting through hole is provided at the connection position between the first annular portion (103) and the second annular portion (104); In the initial state, the valve plate (6) can completely cover the connection through hole, cutting off the connection between the first circular interface (101) and the second circular interface (102).

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