Motorcycle silencer

A technology for mufflers and motorcycles, applied in mufflers, machines/engines, engine components, etc., can solve the problems of unsatisfactory noise reduction effect of mufflers, poor thinness and rigidity of exhaust ducts, and rising manufacturing costs. The effect of unchanged, increased stiffness and low production costs

Inactive Publication Date: 2011-06-29
力帆科技(集团)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

its like figure 1 As shown, the end of the shell 1 is sealed with an end plate 2, and the end chamber 1a is composed of the end plate 2, the partition plate 3 and the shell 1. There are vent holes on the end plate 2, and there are also holes on the end plate 2. If the exhaust duct 7 is inserted, the length of the inlet end of the exhaust duct 7 extending into the last chamber of the housing 1 is relatively short, which is only 1 of the distance from the air inlet 1b of the last chamber 1a to the end plate 2 / 6 or so, so that the exhaust gas entering the end chamber 1a expands and collides with the end plate 2, and is directly discharged through the exhaust duct 7 near the end plate, the buffer route is short, and the noise reduction effect is poor; and the exhaust duct wall is thin and rigid. , when the engine is at high speed, it is easy to vibrate and make a lot of noise. The inner diameter of the exhaust pipe is about 28mm, and the large inner diameter also makes the expanded exhaust gas fail to throttle and attenuate sufficiently. All these make the noise reduction effect of this kind of muffler unsatisfactory.
However, if relying on increasing the chamber, arranging more complex and variable ventilation sections, and thickening the shell to increase its rigidity, the structure will be complicated and the manufacturing cost will increase.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: The inner diameter of the silencer pipe 4 is about 18mm, the wall thickness is about 5mm, and the length is 81mm. The length of the silencer pipe 4 extending into the end chamber 1a is about 61mm. The distance of the silencer pipe 4 is 81mm, and the length of the silencer pipe 4 extending into the end chamber 1a is 3 / 4 of the distance from the air inlet 1b of the chamber to the end plate 2. The distance between gas port 1b is about 20mm.

Embodiment 2

[0015] Embodiment 2: the inner diameter of the muffler pipe 4 is about 18mm, the wall thickness is about 5mm, and the length is 81mm. The length of the muffler pipe 4 extending into the end chamber 1a is about 55mm. The distance of the silencer pipe 4 is 81mm, and the length of the silencer pipe 4 extending into the end chamber 1a is 2 / 3 of the distance from the air inlet 1b of the chamber to the end plate 2. The inlet end of the silencer pipe 4 and the end chamber 1a The distance between gas port 1b is about 26mm.

[0016] The present invention works like this: exhaust gas enters the muffler through the exhaust pipe, passes through the chambers of the muffler in turn, and in the process of entering each chamber through the vent pipe 6 on the partition 3, it continuously expands, throttles, and the sound energy A certain attenuation is obtained, and the gas entering the end chamber 1a expands and hits the end plate 2 and then turns around and is discharged from the muffler pip...

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PUM

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Abstract

The invention discloses a motorcycle silencer, which comprises a shell (1) in which chambers are separated. The tail of the shell (1) is enclosed by an end plate (2) with a hole; and the end plate (2) and a clapboard (3) adjacent to the end plate (2) form a tail chamber (1a) on the rear of the shell (1). The motorcycle silencer is characterized in that: a hush pipe (4) is inserted in the end plate (2), and the length of the hush pipe extending into the tail chamber (1a) is 1 / 2-4 / 5 of a distance from an air inlet (1b) of the chamber to the end plate (2); and the hush tube (4) has the wall thickness of 3-6mm. The motorcycle silencer can effectively reduce noise, has good silencing effect, and can weaken vibration and abnormal sound generated when an engine is at a high speed; and the hush tube is arranged on the conventional silencer, so that the motorcycle silencer is simple in structure, the material preparation and processing technologies are not changed basically, and the production cost is low.

Description

technical field [0001] This invention relates to engine exhaust devices, and in particular, to mufflers for motorcycles. Background technique [0002] The muffler is an important accessory of the motorcycle engine, which is used to reduce the exhaust noise and temperature of the engine, and also has the function of purifying the exhaust gas. At present, most motorcycles all adopt the resistant muffler, which includes a housing, the front end of the housing is connected to the exhaust port of the engine through an exhaust pipe, and the housing is provided with a partition with holes, and the housing is connected by the partition. The interior of the body is divided into multiple chambers. After the high-temperature exhaust gas of the engine enters the muffler through the exhaust pipe at high speed, it expands and throttles continuously during the process of passing through each chamber of the muffler. After so many sudden changes, the sound energy is attenuated. . its like ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): F01N1/08F01N13/08
Inventor吴志畅朱琦王松赵德勇
Owner力帆科技(集团)股份有限公司