Silencer and motorcycle

Abstract

The silencer comprises a silencer body and a resonant cavity, the silencer body is communicated with an engine through an exhaust pipeline, the resonant cavity is communicated with the exhaust pipeline through a bypass, and most controllable exhaust gas of the engine enters the silencer body through the exhaust pipeline or a small part or all controllable exhaust gas of the engine enters the silencer body through the resonant cavity from the bypass; according to the silencer and the motorcycle, dynamic exhaust sound and quiet exhaust sound can be achieved, different use requirements of users are met, meanwhile, the overall structure is simple, a complex structure does not need to be arranged, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to a vehicle accessory component and a motorcycle thereof, in particular to a muffler and a motorcycle. Background Art

[0002] Vehicle exhaust noise is the main source of motor vehicle noise. In order to reduce exhaust noise, motor vehicles generally use exhaust mufflers to reduce the order sound pressure level to meet NVH performance. However, with the increasing personalization and entertainment characteristics of large-displacement motorcycles, the quality of exhaust sound has become an important performance indicator that users directly experience through hearing. Different user groups require different exhaust sound qualities in different application scenarios. For example, they need to be able to achieve both quiet mode and dynamic sound when needed. However, current motorcycle mufflers usually adopt a single-mode design, and the exhaust sound lacks variety, making it difficult to meet the diversity of sound preferences of different user groups and the usage needs in different riding scenarios.

[0003] Therefore, there is an urgent need to develop a muffler and a motorcycle that can achieve an exhaust system with both quiet and dynamic modes, so as to meet the diverse needs of different user groups for exhaust sounds and enhance the driving experience. The exhaust system has a simple structure and low cost. Summary of the invention

[0004] In view of this, the purpose of the utility model is to provide a muffler and a motorcycle, which can achieve two modes of exhaust sound, quiet and dynamic, to meet the different practical needs of users and enhance the driving experience. At the same time, the overall structure of the exhaust structure is simple and the cost is low.

[0005] The utility model provides a muffler, comprising a muffler and a resonance chamber, wherein the muffler is connected to an engine through an exhaust duct, and the resonance chamber is connected to the exhaust duct through a bypass, and most of the controllable exhaust gas from the engine enters the muffler through the exhaust duct, or a small part to all of it enters the muffler through the bypass through the resonance chamber; most of the controllable exhaust gas from the engine enters the muffler through the exhaust duct, or a small part to all of it enters the muffler through the bypass through the resonance chamber, so that switching between two different modes can be achieved, thereby achieving differences in sound quality, and meeting the usage requirements of different users.

[0006] Furthermore, the bypass is provided with an inlet and an outlet, and the inlet and the outlet are correspondingly arranged at the upstream and downstream of the exhaust duct; the inlet and the outlet of the bypass are correspondingly arranged at the upstream and downstream of the exhaust duct, which can extend the flow path of the airflow in the exhaust duct and at the same time improve the silencing effect of the resonance cavity.

[0007] Furthermore, it also includes a control valve, which is located in the exhaust duct between the upstream and downstream of the exhaust duct; the control valve is set to control the flow path of the airflow, which can facilitate switching between different sound modes and facilitate user operation.

[0008] Furthermore, the resonant cavity is an "L"-shaped structure, and the inlet and outlet are correspondingly arranged on the horizontal side and vertical side of the "L"-shaped structure; setting the resonant cavity as an "L"-shaped structure can enhance the resonance effect of the resonant cavity and help further reduce noise.

[0009] Furthermore, the chamber volume of the resonance chamber is 2.5-4.5 times the engine displacement; associating the chamber volume of the resonance chamber with the engine displacement can achieve optimal matching of the exhaust volume and the resonance chamber, achieve better results, and ensure the resonance effect of the resonance chamber.

[0010] Furthermore, the inner diameter of the bypass is 30% to 40% of the inner diameter of the exhaust pipe; the inner diameter of the bypass is related to the inner diameter of the exhaust pipe, which can achieve the best match between the gas volume of the bypass and the exhaust volume of the exhaust pipe, complete resonance, and further eliminate noise.

[0011] Furthermore, the length of the inlet is 100 mm-125 mm, and the length of the outlet is 30 mm-45 mm; the inlet and outlet have different lengths, which can achieve a better resonance effect.

[0012] The utility model discloses a motorcycle, comprising the muffler.

[0013] The beneficial effects of the utility model: the muffler and motorcycle of the utility model, by setting a resonance cavity and controlling the airflow path, make most of the airflow enter the muffler from the exhaust pipe or a small part to all of the airflow enter the muffler from the resonance cavity, thereby obtaining different exhaust sound modes, and can realize switching between quiet and dynamic modes to meet different usage requirements of users. At the same time, the overall structure is simple, which is convenient for users to operate and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 for Figure 1 Cross-sectional view along the AA axis when the control valve is open or closed;

[0017] The above drawings contain the following reference numerals:

[0018] 1. Exhaust main pipe; 2. Control valve; 3. Resonance chamber; 31. Bypass; 4. Muffler. DETAILED DESCRIPTION

[0019] Figure 1 It is a structural schematic diagram of the utility model. Figure 2 for Figure 1 The AA cross-sectional view of the control valve when it is open or closed, such as Figure 1-2 As shown: a muffler of this embodiment includes a muffler 4 and a resonance chamber 3, wherein the muffler 4 is connected to the engine through an exhaust pipe 1, and the resonance chamber 3 is connected to the exhaust pipe 1 through a bypass 31, and most of the engine exhaust can be controlled to enter the muffler 4 through the exhaust pipe 1, or a small part to all of it can enter the muffler 4 through the bypass 31 through the resonance chamber 3; the engine exhaust is controllable (the control method can be achieved by setting a valve and controlling the degree of opening of the valve to control the degree of the engine exhaust entering the muffler through the exhaust pipe) so as to facilitate the control of the size of the exhaust sound. When the valve is completely closed, the engine exhaust all enters the muffler 4 through the bypass 31 through the resonance chamber 3, and at this time the resonance chamber 3 has a great influence on the engine exhaust. The low-frequency components of the sound are attenuated, making the exhaust sound quieter and lighter. When the valve is opened, most of the exhaust gas from the engine enters the muffler 4 through the exhaust pipe 1 (a very small part of the airflow enters the bypass 31), so that the exhaust sound maintains a relatively high volume when reaching the muffler 4, and finally the sound discharged through the muffler 4 is steady and thick. When the valve is partially opened, part of the airflow can enter the muffler 4 through the exhaust pipe 1, and the other part of the airflow can enter the muffler 4 through the resonance chamber 3; there are two bypasses 31, and the two bypasses 31 can be respectively arranged on the muffler 4 and the exhaust pipe 1, or arranged at the engine outlet and the muffler 4, or both arranged on the exhaust pipe 1, to meet different installation requirements.

[0020] In the prior art, as the personalized and entertaining features of large-displacement motorcycles become increasingly prominent, the quality of exhaust sound has become an important performance indicator that users experience directly through hearing. Different user groups require different qualities of exhaust sound from vehicles in different application scenarios. For example, they need to be able to achieve both a quiet mode and a dynamic sound when needed. However, current motorcycle mufflers usually adopt a single-mode design, and the exhaust sound lacks variety, making it difficult to meet the diversity of sound preferences of different user groups and the usage requirements in different riding scenarios. The muffler and motorcycle of the utility model can achieve an exhaust system with both quiet and dynamic modes, thereby meeting the diverse needs of different user groups for exhaust sounds and improving the driving experience. In addition, the exhaust system has a simple structure and low cost.

[0021] In this embodiment, the bypass 31 is provided with an inlet and an outlet, and the inlet and the outlet are correspondingly arranged at the upstream and downstream of the exhaust pipe 1; in this structure, the upstream of the exhaust pipe is a position close to the engine outlet, and the downstream of the exhaust pipe 1 is a position close to the muffler 4. The inlet and the outlet of the bypass 31 are correspondingly arranged at the upstream and downstream of the exhaust pipe 1, which can extend the flow path of the airflow, thereby improving the silencing effect of the resonance cavity 3.

[0022] In this embodiment, a control valve 2 is also included, and the control valve 2 is located in the exhaust pipe 1 between the upstream and downstream of the exhaust pipe 1; the control valve 2 can be controlled to open or close, and can be controlled by manual, solenoid valve control or motor control, for example, by cable control, and the control button can be set on the handlebar of the motorcycle for user operation. The control valve 2 is set between the inlet and outlet of the bypass 31, that is, correspondingly set upstream and downstream of the exhaust pipe 1, so as to control the flow path of the airflow.

[0023] In this embodiment, the resonance cavity 3 is an "L"-shaped structure, and the inlet and outlet are correspondingly arranged on the horizontal side and vertical side of the "L"-shaped structure; the vertical side is a side perpendicular to the exhaust duct 1. Setting the resonance cavity 3 as an "L"-shaped structure can make the airflow in the resonance cavity 3 resonate better, thereby improving the noise reduction effect.

[0024] In this embodiment, the chamber volume of the resonance cavity 3 is 2.5-4.5 times the engine displacement; the resonance effect of the resonance cavity 3 is related to its volume and the engine displacement. The proportional relationship between the chamber volume of the resonance cavity 3 and the engine displacement of this structure can better achieve resonance.

[0025] In this embodiment, the inner diameter of the bypass 31 is 30% to 40% of the inner diameter of the exhaust pipe. By controlling the proportional relationship between the inner diameter of the bypass 31 and the inner diameter of the exhaust pipe 1, the optimal matching of the gas volume of the bypass 31 and the exhaust volume of the exhaust pipe can be achieved, resonance is completed, and noise is further eliminated.

[0026] In this embodiment, the length of the inlet is 100mm-125mm, and the length of the outlet is 30mm-45mm; in this structure, the inlet length and the outlet length are the lengths of the two bypasses 31. This ratio range can achieve a better resonance effect, so that the resonance cavity 3 and the muffler 4 can be better matched.

[0027] The utility model discloses a motorcycle, comprising the muffler.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A muffler, characterized in that: It includes a muffler and a resonance chamber, wherein the muffler is connected to the engine through an exhaust pipe, and the resonance chamber is connected to the exhaust pipe through a bypass, and most of the engine exhaust can be controlled to enter the muffler through the exhaust pipe, or a small part to all of the engine exhaust can enter the muffler through the bypass through the resonance chamber; The bypass is provided with an inlet and an outlet, and the inlet and the outlet are correspondingly arranged at the upstream and downstream of the exhaust pipe.

2. The muffler according to claim 1, characterized in that: The exhaust system also includes a control valve, which is located between the upstream and downstream of the exhaust pipe and is arranged in the exhaust pipe.

3. The muffler according to claim 1, characterized in that: The resonant cavity is an "L"-shaped structure, and the inlet and the outlet are correspondingly arranged on the horizontal side and the vertical side of the "L"-shaped structure.

4. The muffler according to claim 1, characterized in that: The volume of the resonance chamber is 2.5-4.5 times the displacement of the engine.

5. The muffler according to claim 1, characterized in that: The inner diameter of the bypass is 30% to 40% of the inner diameter of the exhaust pipe.

6. The muffler according to claim 1, characterized in that: The length of the inlet is 100 mm-125 mm, and the length of the outlet is 30 mm-45 mm.

7. A motorcycle, characterized in that: A muffler comprising any one of claims 1 to 6.

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