Tuning valve assembly, silencer, exhaust system, engine system and vehicle

Abstract

The utility model discloses a tone tuning valve assembly, a silencer, an exhaust system, an engine system and a vehicle, the tone tuning valve assembly limits the length of an insertion pipe extending into a valve main body under the action of a limiting piece when the insertion pipe is inserted into the valve main body, so that the length of the insertion pipe section inserted into the valve main body can be controlled, and the tone tuning valve assembly is convenient to use. Namely, the insertion pipe section can only be located inside the preset pipe section of the valve body, the insertion pipe section and the valve body are prevented from forming a local small sound cavity, and therefore the high-frequency abnormal sound is greatly reduced.

Description

Technical Field

[0001] This application relates to the field of vehicle component technology, and in particular to a tone valve assembly, a muffler, an exhaust system, an engine system, and a vehicle. Background Technology

[0002] Due to space constraints in the battery placement of new energy vehicles, the volume of the muffler in the exhaust system is limited. To compensate for the acoustic loss caused by the reduced muffler volume, tone-adjusting valves are increasingly being widely used in the exhaust systems of new energy vehicles. Using tone-adjusting valves, the muffler volume can be reduced by approximately 25% to achieve the same acoustic performance. The tone-adjusting valve opens and closes by the force of the exhaust airflow. When the exhaust flow is low (at low throttle and idling), the valve remains closed or opens at a small angle, providing better low-frequency acoustic performance. When the exhaust flow is high, the valve opening angle gradually increases to meet the exhaust back pressure requirements.

[0003] Although tone control valves can compensate for the acoustic loss caused by the reduction in silencing volume to some extent, how to avoid high-frequency abnormal noise generated by tone control valves in high-speed airflow is one of the important issues of concern to those skilled in the art. Utility Model Content

[0004] The purpose of this application is to provide a tuning valve assembly capable of reducing high-frequency abnormal noise. Another purpose of this application is to provide a muffler, exhaust system, engine system, and vehicle including the above-mentioned tuning valve assembly.

[0005] This application provides a tone control valve assembly, including:

[0006] The valve body is tubular;

[0007] The tube has an insertion section that is inserted into the valve body, and the tube and the valve body are axially limited by a limiting member.

[0008] In this embodiment, when the insertion tube is installed in the valve body, the length of the insertion tube extending into the valve body is limited by the limiting member. This controls the length of the insertion tube segment into the valve body, meaning that the insertion tube segment can only be located inside a predetermined segment of the valve body, thus avoiding the formation of a local small acoustic cavity between the insertion tube segment and the valve body, thereby greatly reducing high-frequency abnormal noise.

[0009] In one example, the limiting member is located on the outer peripheral wall of the cannula, and the limiting member abuts against one end opening of the valve body to limit the axial position of the cannula and the valve body.

[0010] In one example, a portion of the cannula wall bulges radially outward to form a protrusion on the outer side of the cannula, and the limiting member includes the protrusion;

[0011] Alternatively, the limiting member is located on the inner wall of the valve body, and the end face of the insertion pipe section abuts against the limiting member.

[0012] In one example, the cannula includes an arc-shaped section connected to the side of the insertion tube segment away from the valve body, the arc-shaped section being the protrusion.

[0013] In one example, the radial distance between the protrusion and the inserted tube segment ranges from 2 mm to 3 mm.

[0014] In one example, the outer peripheral wall of the cannula is fixedly connected to a radially extending boss, and the limiting member includes the boss.

[0015] In one example, the valve body includes a first pipe section and a second pipe section connected together. The first pipe section is a straight pipe section, and the second pipe section is a flared pipe. The greater the distance from the straight pipe section, the larger the inner diameter of the flared pipe.

[0016] Alternatively / and, the tone control valve assembly further includes a valve cover rotatably connected to the valve body at the end away from the insertion tube.

[0017] In addition, this application also provides a muffler, including the tone control valve assembly described in any of the above claims.

[0018] This application also provides an exhaust system, including an exhaust pipe and the above-described muffler, wherein the muffler is disposed in the exhaust pipe.

[0019] This application also provides an engine system including an engine and the exhaust system described above, the exhaust system being connected to the exhaust port of the engine.

[0020] This application also provides a vehicle, including a vehicle body and the aforementioned engine system, wherein the engine system is disposed on the vehicle body.

[0021] The muffler, exhaust system, engine system, and vehicle in this application include the aforementioned tuning valve assembly. Therefore, the muffler, exhaust system, engine system, and vehicle in the embodiments of this application also have the aforementioned technical effects of the tuning valve assembly. Attached Figure Description

[0022] Figure 1 A three-dimensional structural schematic diagram of a tone valve assembly in a specific embodiment provided in this application;

[0023] Figure 2 for Figure 1 Cross-sectional view of the tone control valve assembly;

[0024] Figure 3 for Figure 2Cross-sectional view of the inserted cannula;

[0025] Figure 4 This is a three-dimensional structural schematic diagram of the tone valve assembly in another specific embodiment provided in this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1 Valve cover; 2 Valve body; 21 First pipe section; 22 Second pipe section; 3 Rotary shaft; 4 Insert pipe; 41 Insertion pipe section; 42 Arc-shaped pipe section; 43 Connecting pipe section. Detailed Implementation

[0028] Regarding the technical problem mentioned in the background art of high-frequency abnormal noise generated by tone-adjusting valves in high-speed airflow, the inventors of this application conducted extensive research on the structure of tone-adjusting valves. The research revealed that the main reason for the aforementioned technical problem is that a small local acoustic cavity is formed during the assembly of the inner tube and the valve body. When the engine is running at high speed, the exhaust airflow excites and resonates with this small local acoustic cavity, causing high-frequency abnormal noise. Based on the above findings, this application proposes a technical solution to further explore and resolve the aforementioned technical problem.

[0029] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Please refer to Figures 1 to 4 , Figure 1 A three-dimensional structural schematic diagram of a tone valve assembly in a specific embodiment provided in this application; Figure 2 for Figure 1 Cross-sectional view of the tone control valve assembly; Figure 3 for Figure 2 Cross-sectional view of the inserted cannula; Figure 4 This is a three-dimensional structural schematic diagram of the tone control valve assembly in another specific embodiment provided in this application. Figure 2 The middle arrow indicates the direction of exhaust airflow.

[0031] This application provides a vehicle, which includes a vehicle body and an engine system. One function of the vehicle body is to support other components of the vehicle, and the engine system is mounted on the vehicle body. The engine system includes an engine, an intake system, and an exhaust system. The intake system may include components such as an air filter, an air flow meter, an intake pressure sensor, and a throttle body. The intake system primarily supplies the engine with clean, dry, sufficient, and stable air to meet the engine's requirements.

[0032] In this embodiment, the exhaust system is primarily used to discharge the exhaust gases produced by the engine, while simultaneously reducing exhaust pollution and noise. The exhaust system includes an exhaust pipe, on which components such as a three-way catalytic converter, a flexible connecting pipe, and a muffler can be installed. The exhaust system may have only two stages of mufflers: a pre-stage muffler and a post-stage muffler. Typically, along the exhaust airflow direction, the three-way catalytic converter, flexible connecting pipe, pre-stage muffler, and post-stage muffler are sequentially arranged on the exhaust pipe. Of course, the exhaust system can also have more than two stages of mufflers; for example, an intermediate muffler can be installed between the pre-stage and post-stage mufflers.

[0033] This application provides a tone-tuning valve assembly, mainly used in a post-stage muffler. In this embodiment, the tone-tuning valve assembly includes a valve body 2, a valve cover 1, and a tube 4. The valve body 2 is tubular. In one example, the valve body 2 includes a first tube segment 21 and a second tube segment 22 connected together, with the diameter of the second tube segment 22 being larger than that of the first tube segment 21. The first tube segment 21 can be a straight tube segment, or it can be a non-straight tube structure, such as an arc-shaped tube along its central axis. The second tube segment 22 can be a flared tube connected to the first tube segment 21; the greater the distance from the straight tube segment, the larger the inner diameter of the flared tube. The cross-section of the flared tube can be a smooth curve, such as a circle or an ellipse. The inner wall of the flared tube extends smoothly outward from the straight tube segment. This facilitates smooth airflow and reduces airflow resistance.

[0034] Typically, the inner walls of the first pipe section 21 and the second pipe section 22 are smoothly connected to reduce the impact on airflow.

[0035] This application takes the first pipe section 21 as a straight pipe section and the second pipe section 22 as a trumpet-shaped pipe as an example to further introduce the technical solution and technical effects.

[0036] In this embodiment, the valve cover 1 is rotatably connected to the valve body 2 to open or close the end of the valve body 2 away from the insertion tube 4. Specifically, the valve cover 1 is rotatably connected to the opening of the second pipe section 22 away from the first pipe section 21, which is defined as the first opening in this application. The valve cover 1 can rotate relative to the valve body 2 via a rotating mechanism 3. The rotating mechanism 3 is installed outside the valve body 2. The rotating mechanism 3 can be a rotating shaft or other more complex structures. For example, the rotating mechanism may include an elastic component to facilitate the valve cover 1 to quickly return from the open position to the closed position. Of course, the structure of the rotating mechanism is not limited to the description herein, as long as it can realize the relative rotation of the valve cover 1 relative to the valve body 2 to achieve the function of opening or closing the first opening. Figure 1 and Figure 2 The diagram only shows the rotating mechanism 3 and does not represent the specific structural form of the rotating mechanism 3.

[0037] The valve cover 1 is opened by the exhaust airflow. When the exhaust airflow velocity and pressure are relatively low, the exhaust cannot push the valve cover 1 to open the first opening, and the valve cover 1 is in the state of being about the first opening. When the exhaust airflow velocity and pressure reach the preset value, the valve cover 1 will be pushed by the airflow and rotate relative to the valve body 2, thereby opening the first opening. The greater the exhaust airflow velocity and pressure, the greater the rotation angle of the valve cover 1 relative to the valve body 2, and the larger the opening of the first opening, so as to meet the exhaust back pressure requirements.

[0038] In this embodiment, the insertion tube 4 has an insertion section 41, which is inserted into the valve body 2. In one specific example, the insertion section 41 is circumferentially fitted with the first section 21, and correspondingly, the inner diameter of the second section 22 is also larger than that of the insertion section 41. The insertion tube 4 and the first section 21 can be fixed by welding. In this embodiment, the insertion tube 4 and the valve body 2 are axially limited by a limiting member so that the insertion section 41 is located inside the first section 21. Please refer to... Figure 2 understand, Figure 2 The diagram shows that the length of the first pipe segment 21 is L2, the length of the second pipe segment is L1, and the length of the inserted pipe segment 41 is L3. Obviously, L3 is less than L2, and the insertion end of the inserted pipe segment 41 is within the length range of the first pipe segment 21.

[0039] In other words, when the insertion tube 4 is installed in the valve body 2, the length of the insertion tube 4 extending into the valve body 2 is limited by the limiting component. This controls the length of the insertion tube segment 41 in the valve body 2, meaning that the insertion tube segment 41 can only be located inside a predetermined tube segment of the valve body 2. This avoids the insertion tube segment 41 and the valve body 2 forming a local small acoustic cavity, thereby greatly reducing high-frequency abnormal noise. For example, if the insertion tube segment 41 is located inside the first tube segment 21 and cannot enter the second tube segment 22, it avoids the formation of a local small acoustic cavity between the insertion tube segment 41 and the second tube segment 22 with a larger diameter, thereby greatly reducing high-frequency abnormal noise.

[0040] For the insertion tube 4, the insertion tube 4 also includes a connecting tube section 43 located outside the first tube section 21. The connecting tube section 43 can be connected to the pipeline in the exhaust system. The specific connection method is not limited in this article, but can be referred to the existing technology.

[0041] The limiting component that achieves the above functions can have various specific structures. Several specific implementation methods are given below in this application.

[0042] In one specific embodiment, the limiting member is located on the outer peripheral wall of the insertion tube 4, and the limiting member abuts against the opening of the first tube segment 21 away from the second tube segment 22. This application defines the opening as the second opening, and the second opening abuts against the limiting member to limit the axial position of the insertion tube 4 and the valve body 2.

[0043] In this embodiment, a limiting member is disposed on the outer peripheral wall of the insertion tube 4, and the limiting member abuts against one end opening of the valve body 2 to restrict the axial position of the insertion tube 4 and the valve body 2. The setting of the limiting member will not affect the airflow inside the insertion tube 4 and the valve body 2, and the processing technology of the limiting member is relatively simple and easy to process and form.

[0044] In this embodiment, a portion of the wall of the insertion tube 4 protrudes radially outward to form a protrusion on the outer side of the insertion tube 4, and the limiting member includes the protrusion. There can be only one protrusion, simplifying the manufacturing process. Alternatively, the protrusions can be spaced apart circumferentially along the insertion tube 4, thus providing multi-point circumferential limiting between the insertion tube 4 and the valve body 2, resulting in more reliable limiting.

[0045] Alternatively, the insertion tube 4 can be arranged continuously around its circumference. For example, in one embodiment, the insertion tube 4 includes an arc-shaped tube segment 42 connected to the side of the insertion tube section 41 away from the valve body 2, and the arc-shaped tube segment 42 is a protrusion. In this embodiment, the protrusion is the arc-shaped tube segment 42, which can improve the strength of the insertion tube 4 to a certain extent, and the arc-shaped tube segment 42 can be integrally formed with the insertion tube 4 through a tube expansion process, which is simple.

[0046] In this embodiment, the radial distance between the protrusion and the insertion tube segment 41 ranges from 2 mm to 3 mm. When the height of the protrusion is within the above range, the protrusion has almost no effect on the gas flow inside the insertion tube 4.

[0047] Please refer to Figure 4 In another embodiment, a radially extending boss 44 is fixedly connected to the outer peripheral wall of the insertion tube 4, and the limiting member includes the boss 44. The boss can be fixed to the outer peripheral wall of the insertion tube 4 by welding or other means. In this embodiment, the boss 44 and the insertion tube 4 can be formed separately and then fixed by welding or other processes. The processing technology is simpler, and the position of the boss 44 on the insertion tube 4 can be adjusted according to actual needs, which makes it more flexible in use.

[0048] In another embodiment, the limiting member can also be located on the inner wall of the valve body 2. For example, the limiting member can be located on the inner wall of the first pipe section 21, with the end face of the inserted pipe section 41 abutting against the limiting member to limit the axial position of the insertion tube 4 and the valve body 2. This embodiment can more accurately limit the length of the insertion tube 4 inserted into the first pipe section 21.

[0049] In one specific embodiment, the limiting member is a convex ring disposed on the inner peripheral wall of the first pipe section 21, and the inner diameter of the convex ring is greater than or equal to the inner diameter of the insertion tube 4. The convex ring has a simple structure and is easy to form.

[0050] Although no drawings are provided in the embodiment where the limiting member is disposed on the first pipe section 21, those skilled in the art can fully understand and implement the technical solutions described in this application in conjunction with the description in the specification.

[0051] Based on the above-mentioned tone control valve assembly, this application also provides a muffler. The muffler in the embodiments of this application includes the tone control valve assembly described in any of the above embodiments. Therefore, the muffler provided by this application also has the above-mentioned technical effects of the tone control valve assembly.

[0052] Similarly, the exhaust system, engine system, and vehicle provided in this application all include the aforementioned muffler, and therefore the exhaust system, engine system, and vehicle provided in this application all have the aforementioned technical effects of the tuning valve assembly.

[0053] For other structures of the muffler in this embodiment, please refer to the prior art; they will not be described in detail here.

[0054] In the description of this application, it should be noted that, in the embodiments of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0055] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after the connection.

[0056] The directional terms used in the embodiments of this application, such as "inner" and "outer," are merely for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to 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 the embodiments of this application. Furthermore, unless otherwise stated in this application, "multiple" as used in this application refers to two or more.

[0057] In the description of embodiments of this application, the term "comprising" or any other variations thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0058] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A tuning valve assembly characterized by, The valve body (2) is tubular. The insertion pipe section (41) is inserted into the valve body (2), and the insertion pipe (4) and the valve body (2) are axially limited by a limiting member (42 / 44). The limiting member is located on the outer peripheral wall of the insertion pipe (4) and abuts against the open end of the valve body (2) to limit the axial position of the insertion pipe (4) and the valve body (2).

2. The tuning valve assembly of claim 1, wherein, The pipe wall of the insertion pipe (4) is locally raised radially outward to form a protruding portion on the outer side of the insertion pipe (4), and the limiting member comprises the protruding portion.

3. The tuning valve assembly of claim 2, wherein, Alternatively, the limiting member is located on the inner wall of the valve body (2), and the end surface of the insertion pipe section (41) abuts against the limiting member. The insertion pipe (4) comprises an arc-shaped pipe section (42) connected to the side of the insertion pipe section (41) away from the valve body (2), and the arc-shaped pipe section (42) is the protruding portion.

4. The tuning valve assembly of claim 3, wherein, The radial distance of the protruding portion relative to the insertion pipe section (41) ranges from 2mm to 3mm.

5. The tuning valve assembly of claim 3 or 4, wherein, The outer peripheral wall of the insertion pipe (4) is fixedly connected with a radially extending boss, and the limiting member comprises the boss.

6. The tuning valve assembly of claim 2, wherein, The valve body (2) comprises a first pipe section (21) and a second pipe section (22) connected to each other, the first pipe section (21) is a straight pipe section, and the second pipe section (22) is a horn-shaped pipe, and the farther away from the straight pipe section, the larger the inner diameter of the horn-shaped pipe.

7. The tuning valve assembly of any of claims 1-4, 6, wherein, Alternatively / and, the valve assembly further comprises a valve cover (1) rotatably connected to the end of the valve body (2) away from the insertion pipe (4). The valve assembly according to any one of claims 1 to 7.

8. A muffler characterized by The muffler according to claim 8 is arranged in the exhaust pipeline.

9. An exhaust system characterized by, The exhaust system according to claim 9 is connected to the exhaust port of the engine.

10. An engine system characterized by, The engine system according to claim 10 is arranged on the vehicle body.

11. A vehicle characterized by comprising: ​

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