Active variable exhaust motorcycle silencer
The design of active variable exhaust valve and silencer maze structure solves the problem that traditional motorcycle mufflers cannot adjust the exhaust flow, achieves optimal combustion and noise reduction effects at different speeds, and improves the power and fuel economy of the motorcycle.
Patent Information
- Application Number
- CN202423163586.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Traditional motorcycle mufflers cannot be adjusted according to the engine exhaust flow, resulting in poor engine exhaust, affecting noise control and emissions, and failing to meet strict emission and fuel consumption standards.
An active variable exhaust muffler for motorcycles is designed. The ECU-controlled variable exhaust valve adjusts the valve opening angle under different working conditions to achieve variable exhaust control from low speed to high speed. The labyrinth structure and muffler cotton are combined to reduce noise.
It achieves the optimal combustion state of the engine at different speeds, improves power and fuel economy, reduces pollutant emissions, reduces noise at low speeds, and enhances exhaust sound at high speeds, meeting strict emission and fuel consumption standards.
Smart Images
Figure CN223398746U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of motorcycle mufflers, and in particular relates to an active variable exhaust motorcycle muffler. Background Art
[0002] Currently, domestic motorcycles meet the National IV emission standard. The second draft of the National V emission standard has been released, and progress toward the National V standard is expected over the next two years. As emission regulations become increasingly stringent, all functional systems in motorcycles must meet both higher emission standards and stricter fuel efficiency standards. Furthermore, the customer base is becoming younger and more individualistic, with increasing demands for vehicle maneuverability and comfort. This, in turn, places increasingly stringent demands on various aspects of motorcycle muffler performance, such as noise control.
[0003] As a key component of a motorcycle, the muffler plays a critical role in noise control and emissions. Traditional motorcycle mufflers cannot adjust the exhaust flow rate according to the engine's exhaust flow rate, which can easily lead to engine exhaust congestion, hindering the muffler's ability to absorb the exhaust airflow and the corresponding noise from the engine. This results in high engine noise and noise pollution.
[0004] Therefore, it is necessary to propose a motorcycle muffler with active variable exhaust to solve the above problems. Utility Model Content
[0005] In view of this, the purpose of the utility model is to provide a motorcycle muffler with active variable exhaust, which enables variable exhaust control of the entire vehicle under all working conditions from low speed to high speed, so that when the engine is running at low speed or high speed, the valve is controlled to open at different angles to match the combustion instruction through the ECU's specific calibration signal, so that the engine fuel can be fully burned and the exhaust is in the best state, thereby improving the power and fuel economy of the entire vehicle and reducing pollutant emissions, and achieving low noise at low speed and rich and surging exhaust sound at high speed.
[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions:
[0007] The utility model provides a motorcycle muffler with active variable exhaust, comprising a front-stage muffler package connected to the engine exhaust port through an intake pipe and a rear-stage muffler package connected to the front-stage muffler package through a first connecting pipe, the first connecting pipe being connected to the intake pipe through an intake muffler pipe located inside the front-stage muffler package, the intake muffler pipe being provided with air holes in a circumferential array, the first connecting pipe being provided with a variable exhaust valve, the variable exhaust valve being controlled to open or close by an electronic control unit, a second connecting pipe being connected between the rear-stage muffler package and the front-stage muffler package, and closing the variable exhaust valve can allow exhaust gas to flow from the second connecting pipe into the rear-stage muffler package.
[0008] Furthermore, a first partition is provided in the front-stage silencer package, which divides the front-stage silencer package into a first chamber and a second chamber. A second partition is provided in the second chamber, and air holes are arranged in an array on the second partition. The second partition divides the second chamber into a silencer chamber and a connecting chamber. The air intake silencer pipe is located in the first chamber, and the first chamber is connected to the silencer chamber through a connecting pipe. The first end of the second connecting pipe extends into the connecting chamber.
[0009] Furthermore, the second end of the second connecting pipe is connected to the first connecting pipe, and the second end of the second connecting pipe is connected and arranged between the variable exhaust valve and the rear-stage muffler package.
[0010] Furthermore, an exhaust silencer pipe connected to the first connecting pipe is installed in the rear-stage silencer package, and air holes are arranged in a circumferential array on the exhaust silencer pipe.
[0011] Furthermore, an exhaust pipe is fixedly installed in the rear-stage silencer package, a gap is provided between the exhaust pipe and the exhaust silencer, a third partition fixed to the exhaust pipe is fixedly installed in the rear-stage silencer package, and the exhaust pipe is arranged through the third partition.
[0012] Furthermore, a main body partition and silencer cotton covering the main body partition are fitted on the inner wall of the rear-stage silencer package, and through holes are arranged in a circumferential array on the main body partition.
[0013] The beneficial effects of the present invention are:
[0014] The utility model realizes variable exhaust control of the whole vehicle under all working conditions from low speed to high speed, so that no matter whether the engine is running at low speed or high speed, the valve is controlled to open at different angles to match the combustion instruction through the ECU's specific calibration signal, so that the engine fuel is fully burned and the exhaust is in the best state, thereby improving the power and fuel economy of the whole vehicle and reducing pollutant emissions, and achieving low noise at low speed and rich and surging exhaust sound at high speed.
[0015] Other advantages, objectives, and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or they may be taught by those skilled in the art from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention is described with the following drawings:
[0017] Figure 1 This is a schematic diagram of the internal structure of the front-stage silencer package and the rear-stage silencer package according to an embodiment of the present utility model;
[0018] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the utility model;
[0019] Figure 3 This is a schematic diagram of the variable exhaust valve structure of an embodiment of the present utility model.
[0020] The markings in the accompanying drawings are as follows: intake pipe 1, front-stage silencer package 2, first partition 201, first chamber 202, second partition 203, silencer chamber 204, connecting chamber 205, connecting pipe 206, first connecting pipe 3, rear-stage silencer package 4, intake silencer pipe 5, variable exhaust valve 6, second connecting pipe 7, exhaust silencer pipe 8, exhaust pipe 9, third partition 10, main body partition 11, and silencer cotton 12. DETAILED DESCRIPTION
[0021] like Figures 1-3 As shown, the utility model provides a motorcycle muffler with active variable exhaust, comprising: a front-stage muffler package 2 connected to the engine exhaust port through an intake pipe 1 and a rear-stage muffler package 4 connected to the front-stage muffler package 2 through a first connecting pipe 3, the first connecting pipe 3 is connected to the intake pipe 1 through an intake muffler pipe 5 located inside the front-stage muffler package 2, the intake muffler pipe 5 is provided with air holes in a circumferential array, the first connecting pipe 3 is provided with a variable exhaust valve 6, a second connecting pipe 7 is connected between the rear-stage muffler package 4 and the front-stage muffler package 2, and closing the variable exhaust valve 6 can allow the exhaust gas to flow from the second connecting pipe 7 into the rear-stage muffler package 4.
[0022] In this solution, the intake pipe 1 is fixedly connected to the engine exhaust port through a flange, and the exhaust gas discharged by the engine enters the inner wall of the pipe designed for the muffler. A catalyst that produces a three-way catalytic reaction with the exhaust gas is provided in the intake pipe 1, and the exhaust gas after the reaction enters the front-stage muffler package 2 through the intake pipe 1; according to the opening state of the variable exhaust valve 6, the flow direction of the exhaust gas has three modes, among which mode 1: when the whole vehicle is idling or driving at a low speed, the engine is working at a low speed, and the variable exhaust valve 6 is in a closed state at this time, and the exhaust gas enters the front-stage muffler package 2 through the air holes of the intake muffler pipe 5. After the front-stage muffler package 2 is filled with gas, it enters the rear-stage muffler package 4 through the second connecting pipe 7, and is discharged through the exhaust port of the rear-stage muffler package 4. Out; Mode 2: When the vehicle is traveling at medium or low speed, the engine is operating at medium and low speed, and the variable exhaust valve 6 is in a semi-closed state at this time. A part of the exhaust gas flows through the first connecting pipe 3, passes through the variable exhaust valve 6, and then enters the rear-stage muffler package 4. The other part of the exhaust gas enters the front-stage muffler package 2 through the air holes of the intake muffler pipe 5. After the front-stage muffler package 2 is filled with gas, it enters the rear-stage muffler package 4 through the second connecting pipe 7, and then is discharged through the exhaust port of the rear-stage muffler package 4; Mode 3: When the vehicle is traveling at high speed, the engine is operating at high speed, and the variable exhaust valve 6 is in an open state. The exhaust gas flows through the first connecting pipe 3, passes through the variable exhaust valve 6, and then enters the rear-stage muffler package 4, and then is discharged through the exhaust port of the rear-stage muffler package 4. In the above three modes, the variable exhaust valve 6 is integrated and controlled by the ECU. The ECU outputs a control signal, which is transmitted to the actuator through the controller. The actuator motor rotates to control the valve to open or close. The variable exhaust valve 6 uses the engine speed of 1000 revolutions as a gradient, and correspondingly sets different opening gears to correspond to the full working conditions of the engine. If the valve cannot work normally under extreme circumstances, the exhaust gas can be discharged from mode 1, which will not affect the basic driving of the vehicle.
[0023] Through the design of the above structure, this solution realizes variable exhaust control under all working conditions from low speed to high speed. No matter whether the engine is running at low speed or high speed, the valve opening angle is controlled by the ECU's specific calibration signal to match the combustion command, so that the engine fuel is fully burned and the exhaust is in the best state, thereby improving the power and fuel economy of the whole vehicle and reducing pollutant emissions. It also achieves low noise at low speed and rich and surging exhaust sound at high speed.
[0024] In one embodiment of the present invention, a first partition 201 is provided in the front-stage silencer package 2, and the first partition 201 divides the front-stage silencer package 2 into a first chamber 202 and a second chamber. A second partition 203 is provided in the second chamber, and an array of air holes for exhaust gas to pass through is arranged on the second partition 203. The second partition 203 divides the second chamber into a silencer chamber 204 and a connecting chamber 205. The air intake silencer pipe 5 is located in the first chamber 202, and the first chamber 202 is connected to the silencer chamber 204 through a connecting pipe 206. The first end of the second connecting pipe 7 extends into the connecting chamber 205.
[0025] In this solution, the gas entering the intake silencer pipe 5 flows to the first chamber 202 through the air holes, then flows into the silencer chamber 204 through the connecting pipe 206, and then flows into the second connecting pipe 7 through the air holes of the second partition 203. Through the design of the above structure, a silencer maze structure is formed in the front-stage silencer package 2 to slow down the flow rate and energy of the engine exhaust gas and reduce medium and low frequency noise; it absorbs part of the engine exhaust gas sound intensity through the air hole design of the intake silencer pipe 5 and the air hole design on the second partition 203, thereby reducing high frequency noise and radiation noise.
[0026] In one embodiment of the present invention, the second end of the second connecting pipe 7 is connected to the first connecting pipe 3, and the second end of the second connecting pipe 7 is connected and arranged between the variable exhaust valve 6 and the rear-stage silencer package 4 to ensure the compactness of the structure.
[0027] In one embodiment of the present invention, an exhaust muffler pipe 8 connected to the first connecting pipe 3 is installed in the rear stage muffler package 4, and the exhaust muffler pipe 8 is provided with air holes for exhaust gas to pass through in a circumferential array to reduce exhaust noise.
[0028] In one embodiment of the present invention, an exhaust pipe 9 is fixedly installed in the rear-stage muffler package 4, a gap is provided between the exhaust pipe 9 and the exhaust muffler 8, and a third partition 10 fixed to the exhaust pipe 9 is fixedly installed in the rear-stage muffler package 4, and the exhaust pipe 9 is arranged through the third partition 10 to enhance the noise reduction effect.
[0029] In one embodiment of the present invention, the rear-stage silencer package 4 is provided with a main body partition 11 and silencer cotton 12 covering the main body partition 11 in close contact with the inner wall to enhance the exhaust noise reduction effect.
[0030] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.
Claims
1. An active variable exhaust muffler for a motorcycle, comprising a front-stage muffler package connected to an engine exhaust port via an intake pipe and a rear-stage muffler package connected to the front-stage muffler package via a first connecting pipe, characterized in that: The first connecting pipe is connected to the intake pipe through the intake muffler pipe located inside the front-stage muffler package. The intake muffler pipe is provided with air holes in a circumferential array. The first connecting pipe is provided with a variable exhaust valve. A second connecting pipe is connected between the rear-stage muffler package and the front-stage muffler package. The variable exhaust valve is controlled to open or close by an electronic control unit. Closing the variable exhaust valve can allow exhaust gas to flow from the second connecting pipe into the rear-stage muffler package.
2. The active variable exhaust motorcycle muffler according to claim 1, characterized in that: A first partition is provided in the front-stage silencer package, which divides the front-stage silencer package into a first chamber and a second chamber. A second partition is provided in the second chamber, and air holes are arranged in an array on the second partition. The second partition divides the second chamber into a silencer chamber and a connecting chamber. The air intake silencer pipe is located in the first chamber, and the first chamber is connected to the silencer chamber through a connecting pipe. The first end of the second connecting pipe extends into the connecting chamber.
3. The active variable exhaust motorcycle muffler according to claim 2, characterized in that: The second end of the second connecting pipe is communicated with the first connecting pipe, and the second end of the second connecting pipe is communicated and arranged between the variable exhaust valve and the rear-stage muffler package.
4. The active variable exhaust motorcycle muffler according to claim 3, characterized in that: An exhaust muffler pipe connected to the first connecting pipe is installed in the rear-stage muffler package, and air holes are arranged in a circumferential array on the exhaust muffler pipe.
5. The active variable exhaust motorcycle muffler according to claim 4, characterized in that: An exhaust pipe is fixedly installed in the rear-stage silencer package, a gap is provided between the exhaust pipe and the exhaust silencer, a third partition plate fixed to the exhaust pipe is fixedly installed in the rear-stage silencer package, and the exhaust pipe is arranged through the third partition plate.
6. The active variable exhaust motorcycle muffler according to claim 5, characterized in that: The inner wall of the rear-stage sound-absorbing package is fitted with a main body partition and sound-absorbing cotton covering the main body partition, and the main body partition is provided with through holes in a circumferential array.