A muffler for a twin-cylinder motorcycle

Abstract

This utility model belongs to the technical field of mufflers, and relates to a muffler for a twin-cylinder motorcycle. It includes a first muffler, a second muffler, a first exhaust pipe, a second exhaust pipe, a catalyst sleeve, and a connecting body. The first and second mufflers are arranged parallel to each other and fixedly connected. The front ends of both the first and second mufflers are connected to the rear ends of the catalyst sleeve. A catalyst is disposed inside the catalyst sleeve. The connecting body has a herringbone structure, with its rear end connected to the front end of the catalyst sleeve. A first connecting portion at the front end faces upward and connects to the rear end of the first exhaust pipe, while a second connecting portion faces forward and connects to the horizontal extension of the rear section of the second exhaust pipe. The front sections of the first and second exhaust pipes are parallel and spaced apart. The first and second exhaust pipes are respectively connected to the two exhaust ports of a twin-cylinder motorcycle engine. This utility model provides a twin-cylinder motorcycle muffler that improves the twin-cylinder compatibility of motorcycle mufflers.

Description

Technical Field

[0001] This utility model belongs to the technical field of mufflers, and relates to a muffler for a two-cylinder motorcycle. Background Technology

[0002] A motorcycle muffler is a device used to treat exhaust emissions from motorcycle engines, reducing engine noise and environmental pollution. An exhaust muffler consists of an exhaust pipe and a muffler cylinder, with a catalyst installed inside either the exhaust pipe or the muffler cylinder. The catalyst is a cylindrical material with a honeycomb-like center, used to purify the exhaust gases emitted by the engine.

[0003] For twin-cylinder motorcycles, the requirements for muffler emissions, layout, and noise reduction are even higher. Chinese utility model patent CN204113418U (publication date: January 21, 2015) discloses a dual-exhaust muffler, comprising two cylindrical bodies distributed upper and lower. One end of each cylinder is connected to the vehicle's exhaust port, and the other end is an outlet port. Multiple silencing cavities are spaced apart within each cylinder, and an air outlet is provided at the connection point of adjacent silencing cavities. The air outlet is a mesh-like air outlet. While the aforementioned muffler uses a dual-cylinder structure to increase emission efficiency, the dual-cylinder design significantly increases the muffler's volume, posing considerable challenges to its design, installation, and the layout of other components. Therefore, further structural optimization is needed for dual-cylinder mufflers. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a muffler for a two-cylinder motorcycle, improving the dual-cylinder compatibility of the motorcycle muffler, optimizing the layout, reducing pipeline interference, and enhancing stability.

[0005] To solve the above-mentioned technical problems, the objective of this utility model is achieved through the following technical solution: A muffler for a twin-cylinder motorcycle includes a first muffler, a second muffler, a first exhaust pipe, a second exhaust pipe, a catalyst sleeve, and a connector. The first and second mufflers are arranged in parallel and fixedly connected. The front ends of the first and second mufflers are simultaneously connected to the rear ends of the catalyst sleeve. A catalyst is disposed inside the catalyst sleeve. The connector has a herringbone structure, with its rear end connected to the front end of the catalyst sleeve. The first connecting part of the front end is arranged upward and connected to the rear end of the first exhaust pipe, and the second connecting part is arranged forward and connected to the horizontal extension of the rear section of the second exhaust pipe. The front sections of the first and second exhaust pipes are parallel and spaced apart. The first and second exhaust pipes are respectively connected to the two exhaust ports of the twin-cylinder engine of the motorcycle.

[0006] In the above-mentioned muffler of a twin-cylinder motorcycle, a front oxygen sensor is provided in the connecting body, and a rear oxygen sensor is provided on the rear side of the catalyst sleeve; both the front and rear oxygen sensors are installed through oxygen sensor connectors.

[0007] In the above-mentioned muffler for a twin-cylinder motorcycle, the horizontal extension of the second exhaust pipe is connected to the second connecting part via a pipe joint. The front end of the pipe joint is fixedly connected to the inner wall of the second connecting part, and the rear end is fixedly connected to the outer wall of the horizontal extension. The rear end of the pipe joint is provided with an axial opening and is locked by a clamp.

[0008] In the above-mentioned muffler for a twin-cylinder motorcycle, the front end of the first muffler, the front end of the second muffler, the catalyst sleeve, and the outer side of the connector are all covered by a first anti-scalding plate. The first anti-scalding plate is fixed by a number of anti-scalding fixing plates, at least two of which are set on the catalyst sleeve and at least two of which are set on the connector.

[0009] In the above-mentioned muffler of a twin-cylinder motorcycle, the outer side of the first exhaust pipe is covered with a second anti-scalding plate, the second anti-scalding plate is fixedly connected to the first exhaust pipe by several clamps, the outer side of the second exhaust pipe (including its horizontal extension section) is covered with a third anti-scalding plate, the third anti-scalding plate is fixedly connected to the second exhaust pipe by several clamps, and the second anti-scalding plate and the third anti-scalding plate both form a partially overlapping structure with the first anti-scalding plate.

[0010] In the above-mentioned muffler for a twin-cylinder motorcycle, the first muffler and the second muffler are fixedly connected by a muffler mounting base. The muffler mounting base is fixedly connected to the motorcycle body by fasteners. The two sides of the muffler mounting base are provided with a first arc-shaped connecting end and a second arc-shaped connecting end that are respectively adapted to the first muffler and the second muffler. The first arc-shaped connecting end is fixedly connected to the outer wall of the first muffler by welding, and the second arc-shaped connecting end is fixedly connected to the outer wall of the second muffler by welding.

[0011] In the above-mentioned muffler for a twin-cylinder motorcycle, the first muffler and the second muffler are provided with the same muffler assembly. The muffler assembly includes an intake chamber, an exhaust chamber and an intermediate chamber arranged from front to back in the muffler cylinder. The intake chamber and the intermediate chamber are connected through a first inner pipe. The intermediate chamber and the exhaust chamber are connected through a second inner pipe. The exhaust chamber is connected to the outside through a tailpipe.

[0012] Compared with the prior art, this utility model has the following advantages: This invention provides a muffler for a twin-cylinder motorcycle. A connecting assembly is formed by a catalytic sleeve and a herringbone-shaped connector, connecting the vertically distributed muffler cylinders and the front and rear distributed exhaust pipes. This creates an integrated structure that better suits the dual exhaust, purification, and silencing capabilities of twin-cylinder motorcycles. This invention not only increases structural stability but also reduces exhaust interference between pipes, optimizes the layout, and improves silencing efficiency and engine operating stability. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present invention; Figure 2 This is a perspective view of the present invention from another angle (excluding the anti-scalding plate); Reference numerals in the attached drawings: 1. First muffler; 2. Second muffler; 3. First exhaust pipe; 4. Second exhaust pipe; 5. Catalyst sleeve; 6. Connector; 7. First connecting part; 8. Second connecting part; 9. Horizontal extension section; 10. Pipe joint; 11. First anti-scalding plate; 12. Anti-scalding fixing plate; 13. Second anti-scalding plate; 14. Third anti-scalding plate; 15. Muffler mounting base; 16. First arc-shaped connecting end; 17. Second arc-shaped connecting end. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-2 : A muffler for a twin-cylinder motorcycle includes a first muffler 1, a second muffler 2, a first exhaust pipe 3, a second exhaust pipe 4, a catalyst sleeve 5, and a connecting body 6. The first muffler 1 and the second muffler 2 are arranged in parallel and fixedly connected. The front ends of the first muffler 1 and the second muffler 2 are simultaneously connected to the rear ends of the catalyst sleeve 5. A catalyst is disposed inside the catalyst sleeve 5. The connecting body 6 has a herringbone structure, and its rear end is connected to the front end of the catalyst sleeve 5. The first connecting part 7 at the front end is arranged upward and connected to the rear end of the first exhaust pipe 3, and the second connecting part 8 is arranged forward and connected to the horizontal extension section 9 of the rear section of the second exhaust pipe 4. The front sections of the first exhaust pipe 3 and the second exhaust pipe 4 are parallel and spaced apart. The first exhaust pipe 3 and the second exhaust pipe 4 are respectively connected to the two exhaust ports of the twin-cylinder engine of the motorcycle.

[0015] The exhaust gas produced by the engine is discharged through its two exhaust ports, entering the first exhaust pipe 3 and the second exhaust pipe 4 respectively. After converging through the herringbone connector 6, it enters the catalyst sleeve 5. The catalyst in the catalyst sleeve 5 purifies the exhaust gas. The purified exhaust gas enters the first muffler 1 and the second muffler 2 respectively. After being silenced by the silencing structure inside the first muffler 1 and the second muffler 2 respectively, it is discharged through the corresponding tailpipe.

[0016] In this embodiment, the first muffler 1 and the second muffler 2 are provided with the same muffler assembly. The muffler assembly includes an air inlet chamber, an exhaust chamber and an intermediate chamber arranged from front to back in the muffler cylinder. The air inlet chamber and the intermediate chamber are connected through a first inner pipe. The intermediate chamber and the exhaust chamber are connected through a second inner pipe. The exhaust chamber is connected to the outside through a tailpipe. As the gas flows through the above-mentioned muffler structure, the noise gradually attenuates, thereby achieving the effect of noise reduction.

[0017] In the above-mentioned muffler for a twin-cylinder motorcycle, a front oxygen sensor is installed inside the connector 6, and a rear oxygen sensor is installed on the rear side of the catalyst sleeve 5; both the front and rear oxygen sensors are installed through oxygen sensor connectors; the front oxygen sensor detects the exhaust gas discharged from the exhaust port, and the rear oxygen sensor detects the exhaust gas purified by the catalyst, which can better monitor the purification effect and state of the catalyst.

[0018] The horizontal extension section 9 of the second exhaust pipe 4 is connected to the second connecting part 8 through a pipe joint 10. The front end of the pipe joint 10 is fixedly connected to the inner wall of the second connecting part 8, and the rear end is fixedly connected to the outer wall of the horizontal extension section 9. The rear end of the pipe joint 10 is provided with an axial opening and is locked by a clamp.

[0019] This embodiment also optimizes the layout of the anti-scalding plate, making it cover a wider area, providing better anti-scalding effect, and increasing the overall stability of the muffler structure.

[0020] Specifically, the front end of the first muffler 1, the front end of the second muffler 2, the catalyst sleeve 5, and the outer side of the connector 6 are all covered by a first anti-scalding plate 11. The first anti-scalding plate 11 is fixed by a plurality of anti-scalding fixing plates 12. At least two of the anti-scalding fixing plates 12 are provided on the catalyst sleeve 5 and at least two are provided on the connector 6.

[0021] Furthermore, the outer side of the first exhaust pipe 3 is covered with a second anti-scalding plate 13, and the second anti-scalding plate 13 is fixedly connected to the first exhaust pipe 3 by several clamps. The outer side of the second exhaust pipe 4 (including its horizontal extension section 9) is covered with a third anti-scalding plate 14, and the third anti-scalding plate 14 is fixedly connected to the second exhaust pipe 4 by several clamps. The second anti-scalding plate 13 and the third anti-scalding plate 14 both form a partially overlapping structure with the first anti-scalding plate 11.

[0022] In this embodiment, the first muffler 1 and the second muffler 2 are fixedly connected by a muffler mounting base 15. The muffler mounting base 15 is fixedly connected to the motorcycle body by fasteners. The muffler mounting base 15 has a first arc-shaped connecting end 16 and a second arc-shaped connecting end 17 on both sides, respectively adapted to the first muffler 1 and the second muffler 2. The first arc-shaped connecting end 16 is fixedly connected to the outer wall of the first muffler 1 by welding, and the second arc-shaped connecting end 17 is fixedly connected to the outer wall of the second muffler 2 by welding. This embodiment's muffler mounting base 15 not only securely mounts the muffler but also increases the structural stability between the first and second mufflers.

[0023] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A muffler for a twin cylinder motorcycle, characterized by, The system includes a first muffler (1), a second muffler (2), a first exhaust pipe (3), a second exhaust pipe (4), a catalyst sleeve (5), and a connector (6). The first muffler (1) and the second muffler (2) are arranged parallel to each other and fixedly connected. The front ends of the first muffler (1) and the second muffler (2) are simultaneously connected to the rear ends of the catalyst sleeve (5). The catalyst sleeve (5) contains a catalyst. The connector (6) has a herringbone structure, and its rear end is connected to the front end of the catalyst sleeve (5). The first connecting part (7) at the front end is arranged upward and connected to the rear end of the first exhaust pipe (3), and the second connecting part (8) is arranged forward and connected to the horizontal extension section (9) of the rear section of the second exhaust pipe (4). The front sections of the first exhaust pipe (3) and the second exhaust pipe (4) are parallel and spaced apart. The first exhaust pipe (3) and the second exhaust pipe (4) are respectively connected to the two exhaust ports of the motorcycle's twin-cylinder engine.

2. A muffler for a twin cylinder motorcycle as claimed in claim 1, wherein A front oxygen sensor is provided inside the connector (6), and a rear oxygen sensor is provided on the rear side of the catalyst sleeve (5).

3. A muffler for a twin cylinder motorcycle as defined in claim 1, characterized in that The horizontal extension section (9) of the second exhaust pipe (4) is connected to the second connecting part (8) through a pipe joint (10). The front end of the pipe joint (10) is fixedly connected to the inner wall of the second connecting part (8), and the rear end is fixedly connected to the outer wall of the horizontal extension section (9). The rear end of the pipe joint (10) is provided with an axial opening and is locked by a clamp.

4. A muffler for a twin cylinder motorcycle as claimed in claim 3, wherein The front end of the first muffler (1), the front end of the second muffler (2), the catalyst sleeve (5), and the outer side of the connector (6) are all covered by a first anti-scalding plate (11). The first anti-scalding plate (11) is fixed by several anti-scalding fixing plates (12). At least two of the anti-scalding fixing plates (12) are set on the catalyst sleeve (5) and at least two are set on the connector (6).

5. A muffler for a twin cylinder motorcycle as claimed in claim 4, wherein The outer side of the first exhaust pipe (3) is covered with a second anti-scalding plate (13), which is fixedly connected to the first exhaust pipe (3) by several clamps. The outer side of the second exhaust pipe (4) is covered with a third anti-scalding plate (14), which is fixedly connected to the second exhaust pipe (4) by several clamps. The second anti-scalding plate (13) and the third anti-scalding plate (14) both form a partially overlapping structure with the first anti-scalding plate (11).

6. A muffler for a twin-cylinder motorcycle according to claim 1, characterized in that, The first muffler (1) and the second muffler (2) are fixedly connected by a muffler mounting base (15). The muffler mounting base (15) is fixedly connected to the motorcycle body by fasteners. The muffler mounting base (15) has a first arc-shaped connecting end (16) and a second arc-shaped connecting end (17) on both sides, which are adapted to the first muffler (1) and the second muffler (2) respectively. The first arc-shaped connecting end (16) is fixedly connected to the outer wall of the first muffler (1) by welding, and the second arc-shaped connecting end (17) is fixedly connected to the outer wall of the second muffler (2) by welding.

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