Silencing valve of automobile exhaust system and automobile

Abstract

The utility model provides an automobile exhaust system noise reduction valve and an automobile, the automobile exhaust system noise reduction valve comprises a valve body and a valve plate, the valve body comprises a first circular ring part and a second circular ring part which are integrally formed; the axis of the first circular ring part is parallel to the axis of the second circular ring part, a first circular interface is formed in the first circular ring part, and a second circular interface is formed in the second circular ring part; the diameter of the second circular interface is greater than that of the first circular interface; 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. A mounting seat is arranged on the first circular ring part, the valve plate is arranged on the mounting seat through an elastic assembly, and the valve plate can turn over on the mounting seat. The valve body has the capability of being installed at an outlet and an inlet of a pipeline at the same time due to the fact that the flanges are arranged on the front face and the back face.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a muffler valve for an automotive exhaust system and an automotive, particularly a mini muffler valve suitable for automotive exhaust systems equipped with small displacement engines. Background Technology

[0002] Exhaust system valves are divided into active exhaust system valves and passive exhaust system valves. They are mostly used for noise reduction. Active exhaust system valves are controlled by an electronic control unit (ECU), offering precise control but at a high cost. Passive exhaust system valves, on the other hand, are activated by the pressure difference across a valve plate, resulting in relatively lower operating costs. However, their operation depends on the engine's exhaust pressure. Passive exhaust system valves are a type of exhaust noise reduction component.

[0003] Existing mufflers are generally characterized by their large size, difficulty in installation, and high price, and are mainly used in high-power engines and large-volume muffler packages in traditional gasoline vehicles. However, hybrid vehicles on the market today are generally equipped with small-displacement engines, and the volume of the exhaust system muffler package is significantly reduced, resulting in poor compatibility with large-size mufflers. This means that current mufflers cannot be directly applied to hybrid vehicles, or face technical and cost issues related to installation difficulties.

[0004] The reason for this is that the exhaust muffler valves on the market were initially designed to solve the exhaust acoustic problems of traditional gasoline vehicles. They are outdated, have slow iterations, and cannot adapt to the rapid electrification trend in the Chinese automotive market. Due to the high engine power and large exhaust flow, the valve body is relatively large, with a large force-bearing area, requiring a heavy matching spring. However, high-temperature springs are very expensive, resulting in a bulky and costly valve body. Furthermore, current muffler valve bodies only have a single-sided hinge, limiting installation options to either the pipe outlet or the pipe inlet.

[0005] Patent document CN212508475U discloses a muffler valve assembly, an exhaust system, and an automobile. The muffler valve assembly includes a support frame, a damping plate, and a mass unit. The support frame is fixed to the wall of the exhaust pipe. The first end of the damping plate is fixedly connected to the support frame, and the second end of the damping plate is a free end. The mass unit is fixed to the outside of the damping plate, and the damping plate has multiple perforations. However, the technical solution of this patent document differs from that of this application. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a muffler valve for an automotive exhaust system and an automotive vehicle.

[0007] According to the present invention, a muffler valve for an automotive exhaust system includes: a valve body and a valve plate, wherein the valve body includes: a first annular portion and a second annular portion integrally formed;

[0008] The axis of the first ring portion and the axis of the second ring portion are parallel. A first circular interface is formed on the first ring portion and a second circular interface is formed on the second ring portion.

[0009] The diameter of the second circular interface is larger than the diameter of the first circular interface; 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] 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.

[0011] Preferably, the silencer valve further includes: a shaft, a spring, a first end cap, and a second end cap;

[0012] 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;

[0013] 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;

[0014] 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;

[0015] 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.

[0016] Preferably, in the initial state, the valve plate closes the connection through hole between the first circular interface and the second circular interface;

[0017] 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.

[0018] 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.

[0019] Preferably, the diameter of the second annular portion is larger than the diameter of the first annular portion.

[0020] Preferably, the first annular portion and the second annular portion are both in the form of a boss.

[0021] Preferably, a shock-absorbing pad is provided on the valve body at a position corresponding to the valve plate;

[0022] 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.

[0023] Preferably, the shock-absorbing pad is annular.

[0024] Preferably, the connecting through hole is located at the connection position between the first annular portion and the second annular portion;

[0025] 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.

[0026] This utility model also provides a car, including the above-mentioned car exhaust system muffler valve.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The muffler valve of this utility model can significantly reduce the exhaust noise sound pressure level when the engine is in a low-flow condition, as the pressure difference is insufficient to push the valve plate open. Especially in the idling condition of hybrid vehicles, where the engine flow is low, the closed valve can provide a very significant muffler capability and improve the overall NVH performance of the vehicle. When the engine is in a high-speed, high-flow condition, the pressure difference across the valve plate is greater than the preload of the spring, the valve plate is pushed open, and the valve opens to form an additional passage, which facilitates the downstream flow of air. The formation of multiple passages can reduce the airflow velocity in the exhaust pipe, thereby reducing the jet noise from the exhaust pipe at high engine speeds.

[0029] 2. The muffler valve of this utility model has the advantages of small size, flexible installation and low cost of use. It is especially suitable for the development of mufflers for exhaust systems of small displacement engines. In particular, it can effectively solve the problem of excessive exhaust noise in hybrid vehicles under idling charging conditions. In addition, large displacement engines can also achieve noise reduction by increasing the number of these passive valves installed. Attached Figure Description

[0030] 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:

[0031] Figure 1 A three-dimensional structural diagram of a muffler valve in an automotive exhaust system. Figure 1 ;

[0032] Figure 2 A three-dimensional structural diagram of a muffler valve in an automotive exhaust system. Figure 2 ;

[0033] Figure 3 A schematic diagram of an explosion of a muffler valve in a car's exhaust system;

[0034] Figure 4 A plan view of the muffler valve in a car exhaust system;

[0035] Figure 5 for Figure 4 Schematic diagram of the structure along line AA;

[0036] Figure 6 for Figure 4 Schematic diagram of the structure along line BB;

[0037] Figure 7 A three-dimensional structural diagram of a muffler valve in an automotive exhaust system. Figure 3 .

[0038] The diagram shows:

[0039] Valve body 1 Mounting seat 7

[0040] Shaft 2 First bearing 8

[0041] Spring 3, Second Bearing 9

[0042] First end cap 4, spring clip 10

[0043] Second end cap 5 Connecting seat 11

[0044] Valve plate 6, shock absorber pad 12 Detailed Implementation

[0045] 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.

[0046] Example 1

[0047] like Figures 1 to 7As shown, this embodiment provides a muffler valve for an automotive exhaust system, including: a valve body 1 and a valve plate 6. The valve body 1 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; the first circular interface 101 is used to connect to the outlet of an upstream pipeline, and the second circular interface 102 is used to connect to the inlet of a downstream pipeline; 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 flipped on the mounting seat 7.

[0048] 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.

[0049] The silencer valve 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 a 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 rotate on the valve body 1 via the shaft 2, and the spring 3 is used to provide a reverse torque to limit the rotation of the valve plate 6. A spring coil fixing support is installed on the shaft 2 to reduce the torsional deformation of the spring during rotation.

[0050] The diameter of the second annular portion 104 is larger than the diameter of the first annular portion 103. The first annular portion 103 and the second annular portion 104 are generally in the form of a boss. 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.

[0051] A shock-absorbing pad 12 is provided on the valve body 1 at a position corresponding to the valve plate 6. The shock-absorbing pad 12 is located on the second annular portion 104 and between the valve plate 6 and the valve body 1, and is used to buffer the impact and abnormal noise caused when the valve plate 6 falls. The shock-absorbing pad 12 is annular. The shock-absorbing pad 12 on the valve plate 6 is a steel wire buffer pad, which is installed on the valve plate. The advantage of installing it on the valve plate is that it can reduce the turbulence intensity of the airflow at the edge of the valve plate when the valve is opened.

[0052] The valve in this embodiment can be flipped on both sides to achieve double-sided installation, while existing valves can only be installed on one side.

[0053] Based on the characteristic that the engine power (exhaust flow) of hybrid vehicles is generally small, this utility model optimizes the size by designing a small valve face and matching a small high-temperature spring. Under the same opening pressure and opening stroke conditions, the spring weight of the exhaust valve is reduced by 80% compared with the current exhaust valve, and the overall use cost is reduced by 60%.

[0054] The valve body of this utility model features a double-sided flanged design, with the upstream flange capable of matching different diameters. The above pipelines can be matched with downstream flanges. The above-mentioned piping. Therefore, the valve body of this utility model can be installed at any position in the exhaust pipe.

[0055] This embodiment also provides a car, including the above-described car exhaust system muffler valve.

[0056] Example 2

[0057] Those skilled in the art can understand this embodiment as a more specific description of Embodiment 1.

[0058] This embodiment provides a mini muffler valve for a multi-purpose automotive exhaust system.

[0059] The main components of a silencer valve include: valve body, shock-absorbing pads, shaft, bearing, spring, end cover, spring retainer, and valve plate.

[0060] The valve disc is connected to the shaft and rotates around the shaft. A spring located on the outside of the valve body end cover provides a counter-torque to limit valve rotation. Damping pads are located between the valve disc and the valve body to buffer impacts and noises caused when the valve disc sits down. Bearings are located at both ends of the shaft and installed in the recessed areas of the end cover, restricting the shaft's degrees of freedom in all directions.

[0061] Working principle:

[0062] The valve body has two circular interfaces, upstream and downstream. The smaller circular hole is the upstream interface, which facilitates installation of the valve body at the pipeline outlet. The larger circular hole is the downstream interface, which allows the valve to be installed at the pipeline inlet. Therefore, unlike valve bodies currently on the market that can only be installed on one side of the pipeline, the valve body design in this embodiment can simultaneously achieve the function of being installed on both sides of the pipeline.

[0063] The opening and closing of the valve is determined by the pressure difference between the upstream and downstream of the valve plate (the upstream pressure is at the small orifice end, and the downstream pressure is at the large orifice end). When the valve is closed, the noise reduction capability of the silencer can be significantly improved.

[0064] The spring provides the valve with a corresponding preload force, and the valve can only be opened when the pressure difference is greater than the preload force.

[0065] When the engine is operating at low flow rates, the pressure difference required to open the valve is insufficient. Therefore, a closed valve can significantly reduce exhaust noise sound pressure level. This is especially true for hybrid vehicles idling, where the engine flow rate is low, and a closed valve provides significant noise reduction, improving the overall NVH performance of the vehicle.

[0066] When the engine operates at high speed and high flow rate, the pressure difference across the valve exceeds the preload, causing the valve to open and create an additional passage, facilitating downstream airflow. This multi-passage configuration reduces the airflow velocity within the exhaust pipe, thereby lowering the exhaust nozzle's jet noise at high engine speeds.

[0067] Existing mufflers are characterized by their large size, difficult placement, and high price, and are mainly used in high-power engines and large-volume muffler packages. Current hybrid vehicle development primarily utilizes small-displacement engines, resulting in a significant reduction in the size of exhaust system mufflers, making current large-size mufflers poorly compatible. This embodiment uses a smaller valve body, offering better cost and space adaptability.

[0068] Existing silencers have fixed installation locations, meaning they can only be installed at either the pipe outlet or the pipe inlet. This embodiment, however, utilizes a square, double-flanged design to allow for installation at both pipe outlets and inlets.

[0069] Existing silencers are characterized by large valve face size, high force, large spring size, and high spring cost. The valve body of this embodiment has advantages such as small size, low force, smaller spring size, and significantly reduced cost. The price of the valve body of this embodiment is approximately 35% of that of existing silencers.

[0070] Knocking noise upon seat placement is prevalent in existing silencer valve applications, severely impacting the end-user experience. This embodiment reduces the knocking noise by increasing friction between the shaft and bearing to slow down the shaft's seat placement angular velocity. Friction is further increased by surface treatment of the shaft surface at the bearing contact area.

[0071] This embodiment only requires one muffler valve on a small-displacement engine, while for a large-displacement engine, two or more can be installed as needed, making the application more flexible.

[0072] The passive valve for the automotive exhaust system in this embodiment has advantages such as small size, flexible installation, and low operating cost. It is especially suitable for the development of mufflers for small displacement engine exhaust systems. In particular, it can effectively solve the problem of excessive exhaust noise in hybrid vehicles under idling charging conditions. In addition, large displacement engines can also achieve noise reduction by increasing the number of these passive valves installed.

[0073] The valve body of this utility model is designed with two flanges on the front, enabling it to be installed at both the outlet and inlet of a pipeline.

[0074] 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.

[0075] 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. A muffler valve for an automotive exhaust system, characterized by, The muffler valve comprises a valve body (1) and a valve plate (6), the valve body (1) comprises a first circular ring part (103) and a second circular ring part (104) which are integrally formed; The axis of the first circular ring part (103) is parallel to the axis of the second circular ring part (104), a first circular interface (101) is formed on the first circular ring part (103), and a second circular interface (102) is formed on the second circular ring part (104); The diameter of the second circular interface (102) is greater than the diameter of the first circular interface (101); the first circular interface (101) is used for connecting the outlet of the upstream pipeline, and the second circular interface (102) is used for connecting the inlet of the downstream pipeline; The first circular ring part (103) is provided with a mounting seat (7), the valve plate (6) is arranged on the mounting seat (7) through an elastic assembly, and the valve plate (6) can be flipped on the mounting seat (7). The muffler valve further comprises a shaft (2), a spring (3), a first end cover (4) and a second end cover (5); 2. The automotive exhaust system muffler valve of claim 1, wherein The first end cover (4) and the second end cover (5) are mounted on the mounting seat (7); one end of the shaft (2) is rotatably connected with the first end cover (4) through a first bearing (8), the other end of the shaft (2) penetrates through the second end cover (5), and the second end cover (5) is rotatably connected with the shaft (2) through a second bearing (9); The other end of the shaft (2) is provided with a spring clamping plate (10), the spring (3) is sleeved on the shaft (2) and located between the spring clamping plate (10) and the second end cover (5); one end of the spring (3) is connected with the shaft (2), and the other end of the spring (3) is connected with the mounting seat (7); The valve plate (6) is provided with a connecting seat (11) connected with 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) through the shaft (2), and the spring (3) is used for providing a reverse torque to limit the flipping of the valve plate (6). In an initial state, the valve plate (6) closes the connecting through hole between the first circular interface (101) and the second circular interface (102); 3. The automotive exhaust system muffler valve of claim 1, wherein 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) is flipped to be opened, and the first circular interface (101) and the second circular interface (102) are communicated; When the pressure difference between the outlet of the upstream pipeline and the inlet of the downstream pipeline is less than the preset value, the valve plate (6) is flipped to be closed through the elastic assembly, and the first circular interface (101) and the second circular interface (102) are not communicated. The diameter of the second circular ring part (104) is greater than the diameter of the first circular ring part (103).

4. The automotive exhaust system muffler valve of claim 1, wherein The first circular ring part (103) and the second circular ring part (104) are in the form of a whole boss.

5. The automotive exhaust system muffler valve of claim 4, wherein A shock pad (12) is arranged on the valve body (1) corresponding to the position of the valve plate (6); 6. The automotive exhaust system muffler valve of claim 1, wherein ​ The damping gasket (12) is arranged on the second annular part (104) and between the valve plate (6) and the valve body (1) to buffer the knocking and abnormal sound caused by the falling of the valve plate (6).

7. The automotive exhaust system muffler valve of claim 6, wherein The damping gasket (12) is annular.

8. The automotive exhaust system muffler valve of claim 3, wherein The connecting through hole is arranged at the connecting position of the first annular part (103) and the second annular part (104). In the initial state, the valve plate (6) can completely cover the connecting through hole to cut off the communication between the first circular interface (101) and the second circular interface (102).

9. An automobile characterized by comprising: The automobile exhaust system silencer valve comprises a valve body (1), a valve plate (6) and a damping gasket (12).

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