Exhaust system silencer for automobile

A technology of exhaust system and muffler, which is applied in the field of auto parts, can solve the problem of weak muffler noise reduction effect, and achieve the effect of reducing noise

Active Publication Date: 2020-01-31
宁波宏诺汽车零部件科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The automobile exhaust system muffler provided by the present invention changes the structure of the muffler in the prior art, and solves the problem that the muffler effect of the existing muffler is weak

Method used

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  • Exhaust system silencer for automobile
  • Exhaust system silencer for automobile
  • Exhaust system silencer for automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 A kind of automobile exhaust system muffler shown is the main muffler of the exhaust system, comprising a shell 10, a partition 40 and an inner muffler pipe 50, the shell 10 has an inner cavity 11, and the inner cavity 11 One end communicates with the middle pipe 20 of the exhaust system, the other end of the inner chamber 11 communicates with the tailpipe 30 of the exhaust system, the partition 40 is arranged in the inner chamber 11, and the partition 40 A through hole 41 is opened on it, and the partition 40 divides the inner chamber 11 into a front chamber 111 and a rear chamber 112, the front chamber 111 communicates with the middle pipe 20, and the rear chamber 112 communicates with the tailpipe 30, the inner muffler pipe 50 is set in the rear chamber 112 through an annular plate 60, and the annular plate 60 divides the rear chamber 112 into a first rear chamber 1121 and the second rear chamber 1122, one end of the inner muffler pipe 50 extends in...

Embodiment 2

[0028] Such as figure 1 As shown, on the basis of the first embodiment, the side wall of the second conical tube 54 is provided with several vent holes 541, and the apertures of the vent holes 541 are all less than 1mm. When the gas flows through the second When the conical tube 54 is used, the energy loss of the sound wave due to gas flow in the propagation process depends on the friction loss of the air in the micropores, and the friction loss depends on the acoustic resistance of the second conical tube 54. The greater the acoustic resistance, the greater the frictional loss. The greater the loss, the acoustic resistance is inversely proportional to the square of the aperture. When the aperture is less than 1 mm, the acoustic resistance is greatly increased compared with the general perforated tube (the aperture is between several millimeters and tens of millimeters), thus making the second The sound absorption performance of the tapered pipe 54 is enhanced.

Embodiment 3

[0030] Such as figure 1 and figure 2 As shown, on the basis of the second embodiment, the side wall of the through hole 41 is provided with several cylinders 70 in a ring, and the adjacent cylinders 70 are connected by a short plate 80, and the short plate 80 is A rectangular hole 81 is opened, and a first channel 90 is formed between adjacent cylinders 70 and corresponding short plates 80 and the side walls of the through holes 41 , and between several cylinders 70 and several short plates 80 The second passage 100, when the gas flows from the second passage 100, the inner cavities of several cylinders 70, several first passages 90, and several rectangular holes 81 to the first rear chamber 1121, in the second passage 100 The confluence with the first rear chamber 1121, the confluence of the inner cavity of the cylinder body 70 and the first rear chamber 1121, the confluence of the first channel 90 and the first rear chamber 1121, the rectangular hole 81 and the first rear ...

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PUM

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Abstract

The invention discloses an exhaust system silencer for an automobile, and belongs to the field of automobile parts. The exhaust system silencer for the automobile comprises a shell, a partition plateand an inner silencing pipe, wherein the shell is provided with an inner cavity, one end of the inner cavity is in communication with a middle pipe of an exhaust system, the other end of the inner cavity is in communication with a tail pipe of the exhaust system, the partition plate is arranged in the inner cavity, a through hole is formed in the partition plate, and the partition plate divides the inner cavity into a front chamber and a rear chamber; the front chamber is in communication with the middle pipe, and the rear chamber is in communication with the tail pipe; and the inner silencingpipe is arranged in the rear chamber through an annular plate, the rear chamber is divided into a first rear chamber and a second rear chamber by the annular plate, one end of the inner silencing pipe extends into the second rear chamber. Due to the fact that the shell is internally provided with the partition plate and the inner silencing pipe, the silencing effect of the exhaust system silenceris better, and the comfort of the automobile is improved.

Description

technical field [0001] The invention relates to the technical field of auto parts, in particular to an exhaust system muffler for an automobile. Background technique [0002] The automobile muffler is mainly used to reduce the noise generated by the engine of the motor vehicle. The principle is that the automobile exhaust pipe is composed of two pipes with different lengths. The length difference is equal to half of the wavelength of the sound waves emitted by the car, so that the two rows of sound waves interfere with each other and cancel each other out when they are superimposed, reducing the sound intensity and reducing the transmitted sound, thereby achieving the effect of noise reduction. [0003] Existing mufflers are usually equipped with exhaust pipes with different pipe diameters in the casing. Due to the change of pipe diameter, the flow velocity of gas will change. When the flow velocity of gas slows down, the gas flow will cause Noise reduction, although such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N1/06F01N1/08
CPCF01N1/06F01N1/08F01N1/082
Inventor 不公告发明人
Owner 宁波宏诺汽车零部件科技有限公司
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