Tight coupling type two-stage catalysis motorcycle silencer

Abstract

The utility model discloses a tight coupling type two-stage catalysis motorcycle silencer, which belongs to the technical field of motorcycle silencers and comprises a front-stage silencing bag and a rear-stage silencing bag, the front-stage silencing bag is fixedly connected with an exhaust port of a motorcycle engine through an exhaust pipe, a front-stage catalyst is mounted in an air inlet pipe, and a rear-stage catalyst is mounted in the rear-stage silencing bag. A rear-stage catalyst fixed to the tail end of the air inlet pipe is installed in the front-stage silencing bag, the front-stage silencing bag is connected with the rear-stage silencing bag through a front silencing pipe, and a first rear silencing pipe fixedly connected with the front silencing pipe and a second rear silencing pipe fixedly connected with an exhaust port of the rear-stage silencing bag are arranged in the rear-stage silencing bag. The first rear silencing pipe and the second rear silencing pipe are communicated with an inner cavity of the rear-stage silencing bag and are arranged in a staggered mode. The rear-stage catalytic agent is integrated in the front-stage silencing bag of the silencer, the overall arrangement structure is more compact, meanwhile, the gravity center of a whole vehicle is more stable, the weight of the silencer is reduced, and arrangement interference on other functional parts is eliminated.

Description

Technical Field

[0001] The utility model belongs to the technical field of motorcycle mufflers, and in particular relates to a tightly coupled two-stage catalytic 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 functional component of a motorcycle, the muffler plays a key role in noise control and emissions. Therefore, the design of motorcycle mufflers needs to be more compact and lightweight while also taking into account overall vehicle performance. Existing motorcycle mufflers still have significant room for improvement in noise control and overall structural layout. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a tight-coupled two-stage catalytic motorcycle muffler that is more compact, lightweight, and takes into account the performance of the entire vehicle.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions:

[0006] The utility model provides a tightly coupled two-stage catalytic motorcycle muffler, comprising a front-stage muffler package and a rear-stage muffler package, wherein the front-stage muffler package is tightly connected to the exhaust port of a motorcycle engine through an exhaust pipe, a front-stage catalyst is installed in an intake pipe, a rear-stage catalyst fixed to the tail end of the intake pipe is installed in the front-stage muffler package, the front-stage muffler package is connected to the rear-stage muffler package through a front muffler pipe, a rear muffler pipe 1 fixedly connected to the front muffler pipe, and a rear muffler pipe 2 fixedly connected to the exhaust port of the rear-stage muffler package are provided in the rear-stage muffler package, the rear muffler pipe 1 and the rear muffler pipe 2 are communicated with the internal cavity of the rear-stage muffler package and are staggered.

[0007] Furthermore, two intake pipes are provided, and the two intake pipes are merged and connected through a connecting pipe. The connecting pipe is fixedly installed in the front-stage silencer package, and the rear-stage catalyst is arranged at the end of the connecting pipe away from the intake pipe. The front-stage baffle one and the front-stage baffle two are fixed in sequence in the front-stage silencer package along the exhaust direction, and a gap is provided between the front-stage baffle one and the front-stage baffle two. The connecting pipe and the front silencer pipe are both fixed on the front-stage baffle one and the front-stage baffle two, and the connecting pipe and the front silencer pipe are staggered.

[0008] Furthermore, a rear-stage partition plate 1 and a rear-stage partition plate 2 are fixed in sequence in the rear-stage silencer package along the exhaust direction, a gap is provided between the rear-stage partition plate 1 and the rear-stage partition plate 2, the rear-stage silencer pipe 1 and the rear-stage silencer pipe 2 both pass through the rear-stage partition plate 1 and are fixed to the rear-stage partition plate 1, and the rear-stage partition plate 2 is provided close to the exhaust port of the rear-stage silencer package.

[0009] Furthermore, the rear-stage silencer package is provided with two exhaust ports, one of the two exhaust ports is fixedly connected to the rear silencer pipe 2, and the other of the two exhaust ports is fixedly connected to the exhaust pipe extending into the rear-stage silencer package, and the exhaust pipe and the rear silencer pipe 2 both pass through the rear-stage partition 2 and are fixed to the rear-stage partition 2.

[0010] Furthermore, the shells of the front-stage silencer package and the rear-stage silencer package are also provided with sound-absorbing interlayers.

[0011] Furthermore, the portion of the front silencer pipe extending into the front-stage silencer package, the rear silencer pipe 1, the portion of the rear silencer pipe 2 between the rear-stage partition 1 and the rear-stage partition 2, and the portion of the exhaust pipe between the rear-stage partition 2 and the exhaust port of the rear-stage silencer package are all provided with air holes in a circumferential array.

[0012] Furthermore, the front-stage partition plate 1 and the rear-stage partition plate 1 are both provided with air holes in an array.

[0013] The beneficial effects of the present invention are:

[0014] This utility model realizes the compatible arrangement of National IV and National V catalysts. During the National IV emission stage, the rear-stage catalyst can be used to meet the emission standards. When the National V is implemented, the front and rear-stage catalyst arrangement can be used to meet the National V emission standards. The rear-stage catalyst is integrated inside the front-stage silencer package of the muffler. The overall arrangement structure is more compact and the center of gravity of the vehicle is more stable, which improves the handling performance. Compared with the traditional arrangement method, the number of pipes used to connect the catalyst is reduced, and the weight of the muffler is reduced by about 0.3~0.5Kg, making the rear oxygen sensor required for the National V emission standard easier to arrange and eliminating interference with the arrangement of other functional components.

[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] Fig. 1This is a schematic diagram of the overall structure of the motorcycle muffler of the utility model;

[0018] Fig. 2 The figure is a schematic diagram of the internal structure of the front-stage silencer package and the rear-stage silencer package of the motorcycle silencer of the utility model.

[0019] The markings in the accompanying drawings are as follows: front-stage silencer package 1, rear-stage silencer package 2, air intake pipe 3, front silencer pipe 4, rear silencer pipe 1 5, rear silencer pipe 2 6, connecting pipe 7, front-stage baffle 1 8, front-stage baffle 2 9, rear-stage baffle 1 10, rear-stage baffle 2 11, exhaust pipe 12. DETAILED DESCRIPTION

[0020] like Figs. 1-2 As shown, the utility model provides a tightly coupled two-stage catalytic motorcycle muffler, comprising: a front-stage muffler package 1 and a rear-stage muffler package 2, wherein the front-stage muffler package 1 is tightly connected to the exhaust port of the motorcycle engine through an intake pipe 3, a front-stage catalyst is installed in the intake pipe 3, a rear-stage catalyst fixed to the tail end of the intake pipe 3 is installed in the front-stage muffler package 1, the front-stage muffler package 1 is connected to the rear-stage muffler package 2 through a front muffler pipe 4, the rear-stage muffler package 2 is provided with a rear muffler pipe 1 5 fixedly connected to the front muffler pipe 4, and a rear muffler pipe 2 6 fixedly connected to the exhaust port of the rear-stage muffler package 2, the rear muffler pipe 1 5 and the rear muffler pipe 2 6 are connected to the internal cavity of the rear-stage muffler package 2 and are staggered.

[0021] In this solution, the front-stage muffler package 1 is connected to the two exhaust ports of the engine through two intake pipes 3, respectively, by flange fastening. The exhaust gas discharged from the engine enters through the intake pipe 3, and produces a three-way catalytic reaction with the front-stage catalyst in the intake pipe 3. After that, it enters the front-stage muffler package 1 and produces a three-way catalytic reaction with the rear-stage catalyst. The front-stage catalyst and the rear-stage catalyst react with the exhaust gas to purify the pollutants such as CO, THC, and NOx in the exhaust gas. At the same time, the airflow quickly enters the front-stage muffler package 1, filling the entire front-stage muffler package 1, and then enters the rear-stage muffler package 2 through the front muffler pipe 4. After filling the rear-stage muffler package 2, it is discharged into the atmosphere from the exhaust port of the rear-stage muffler package 2 through the rear muffler pipe 2 6. Among them, the catalyst is a cylindrical body with a honeycomb shape in the middle, which is used to purify the exhaust gas emitted by the engine.

[0022] This solution achieves compatible layout of National IV and National V catalysts. During the National IV emission stage, the rear-stage catalyst can be used to meet the emission standards. When National V is implemented, the front and rear-stage catalyst layout solution can be used to meet the National V emission standards. The rear-stage catalyst is integrated into the muffler front-stage silencer package 1. The overall layout structure is more compact and the center of gravity of the vehicle is more stable, which improves the handling performance. Compared with the traditional layout method, the number of pipes used to connect the catalyst is reduced, and the weight of the muffler is reduced by about 0.3~0.5Kg. This makes the rear oxygen sensor required for the National V emission standard easier to arrange and eliminates interference with the layout of other functional components.

[0023] In one embodiment of the present invention, the air intake pipe 3 is provided with two, and the two air intake pipes 3 are connected by a connecting pipe 7. The connecting pipe 7 is fixedly installed in the front-stage muffler package 1, and the rear-stage catalyst is arranged at the end of the connecting pipe 7 away from the air intake pipe 3. The front-stage partition 1 8 and the front-stage partition 2 9 are fixed in sequence in the exhaust direction in the front-stage muffler package 1. A gap is provided between the front-stage partition 1 8 and the front-stage partition 2 9. The connecting pipe 7 and the front muffler pipe 4 are all penetrated by the fixed It is fixed on the front-stage partition plate 1 8 and the front-stage partition plate 2 9, and the connecting pipe 7 is staggered with the front silencer pipe 4; the rear-stage partition plate 10 and the rear-stage partition plate 2 11 are fixed in the rear-stage silencer package 2 along the exhaust direction, and a gap is provided between the rear-stage partition plate 10 and the rear-stage partition plate 2 11. The rear silencer pipe 1 5 and the rear silencer pipe 2 6 both pass through the rear-stage partition plate 10 and are fixed to the rear-stage partition plate 10, and the rear-stage partition plate 2 11 is provided close to the exhaust port of the rear-stage silencer package 2.

[0024] In this solution, when the exhaust gas flows through the front-stage silencer package 1 and the rear-stage silencer package 2, the silencer structure composed of the partition and the silencer pipe of the front and rear-stage silencer packages can effectively reduce the airflow velocity and increase the resistance of the airflow discharge, thereby achieving the purpose of noise reduction and silencing.

[0025] In one embodiment of the present invention, the rear-stage silencer package 2 is provided with two exhaust ports, one of the two exhaust ports is connected to the rear silencer pipe 2 6, and the other of the two exhaust ports is connected to the exhaust pipe 12 extending into the rear-stage silencer package 2, and the exhaust pipe 12 and the rear silencer pipe 2 6 both pass through the rear-stage partition 2 11 and are fixed to the rear-stage partition 2 11.

[0026] In one embodiment of the present invention, the shells of the front-stage silencer package 1 and the rear-stage silencer package 2 are both provided with a sound-absorbing interlayer (not shown in the figure) to effectively reduce the high-frequency noise generated during high-speed operation of the engine, thereby reducing the uncomfortable noise pollution radiated from the silencer by the airflow.

[0027] In one embodiment of the present invention, the portion of the front muffler pipe 4 extending into the front muffler package 1, the portion of the rear muffler pipe 1 5 and the portion of the rear muffler pipe 2 6 between the rear baffle 1 10 and the rear baffle 2 11, and the portion of the exhaust pipe 12 between the rear baffle 2 11 and the exhaust port of the rear muffler package 2 are all provided with air holes in a circumferential array, so that the exhaust gas can fill the front and rear muffler packages.

[0028] In one embodiment of the present invention, air holes are arranged in an array on the front-stage partition plate 8 and the rear-stage partition plate 10.

[0029] In one embodiment of the present invention, both the front and rear stage silencer packages are designed with a unique resonant silencer cavity structure, which can effectively improve the sound quality of the exhaust airflow and provide a proper sports sound 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. A close-coupled two-stage catalytic motorcycle muffler, characterized by: The utility model comprises a front-stage silencer package and a rear-stage silencer package, wherein the front-stage silencer package is fastened to the exhaust port of the motorcycle engine through the exhaust pipe, a front-stage catalyst is installed in the intake pipe, and a rear-stage catalyst fixed to the tail end of the intake pipe is installed in the front-stage silencer package, the front-stage silencer package is connected to the rear-stage silencer package through the front silencer pipe, and the rear-stage silencer package is provided with a rear silencer pipe 1 fixedly connected to the front silencer pipe and a rear silencer pipe 2 fixedly connected to the exhaust port of the rear-stage silencer package, the rear silencer pipe 1 and the rear silencer pipe 2 are communicated with the internal cavity of the rear-stage silencer package and are staggered.

2. The close-coupled two-stage catalytic motorcycle muffler according to claim 1, characterized in that: There are two intake pipes, which are connected by a connecting pipe. The connecting pipe is fixedly installed in the front-stage silencer package. The rear-stage catalyst is arranged on the connecting pipe away from the end of the intake pipe. The front-stage baffle 1 and the front-stage baffle 2 are fixed in sequence in the front-stage silencer package along the exhaust direction. A gap is provided between the front-stage baffle 1 and the front-stage baffle 2. The connecting pipe and the front silencer pipe are both fixed on the front-stage baffle 1 and the front-stage baffle 2, and the connecting pipe and the front silencer pipe are staggered.

3. The close-coupled two-stage catalytic motorcycle muffler according to claim 2, characterized in that: A rear-stage partition plate 1 and a rear-stage partition plate 2 are fixed in sequence in the rear-stage silencer package along the exhaust direction. A gap is provided between the rear-stage partition plate 1 and the rear-stage partition plate 2. The rear-stage silencer pipe 1 and the rear-stage silencer pipe 2 both pass through the rear-stage partition plate 1 and are fixed to the rear-stage partition plate 1. The rear-stage partition plate 2 is provided close to the exhaust port of the rear-stage silencer package.

4. The close-coupled two-stage catalytic motorcycle muffler according to claim 3, characterized in that: The rear-stage silencer package is provided with two exhaust ports, one of which is fixedly connected to the rear silencer pipe 2, and the other of the two exhaust ports is fixedly connected to the exhaust pipe extending into the rear-stage silencer package, and the exhaust pipe and the rear silencer pipe 2 both pass through the rear-stage partition 2 and are fixed to the rear-stage partition 2.

5. The close-coupled two-stage catalytic motorcycle muffler according to claim 4, characterized in that: The shells of the front-stage silencer package and the rear-stage silencer package are also provided with sound-absorbing interlayers.

6. The close-coupled two-stage catalytic motorcycle muffler according to claim 4, characterized in that: The portion of the front silencer pipe extending into the front-stage silencer package, the rear silencer pipe 1, the portion of the rear silencer pipe 2 between the rear-stage partition 1 and the rear-stage partition 2, and the portion of the exhaust pipe between the rear-stage partition 2 and the exhaust port of the rear-stage silencer package are all provided with air holes in a circumferential array.

7. The close-coupled two-stage catalytic motorcycle muffler according to claim 4, characterized in that: The front-stage partition plate 1 and the rear-stage partition plate 1 are both provided with air holes in an array.

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