Vehicle exhaust muffler pasted with high temperature-resistant sound-absorbing layer and manufacturing method thereof

A technology for automobile exhaust and high temperature resistance. It is applied in the direction of exhaust devices, noise reduction devices, machines/engines, etc. It can solve the problems of sound absorption performance and engine power loss, low engine power loss, and high cost, and achieve excellent absorption. Acoustic effect, improvement of vibration mode, effect of consuming sound transmission energy

Inactive Publication Date: 2010-09-15
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the existing automobile exhaust muffler that the sound absorption performance and engine power loss cannot be taken into account and the cost is high, the present invention provides a paste-resistant muffler that has good sound absorption performance while ensuring low engine power loss and low cost. Automobile exhaust muffler with high-temperature sound-absorbing layer and manufacturing method thereof

Method used

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  • Vehicle exhaust muffler pasted with high temperature-resistant sound-absorbing layer and manufacturing method thereof
  • Vehicle exhaust muffler pasted with high temperature-resistant sound-absorbing layer and manufacturing method thereof
  • Vehicle exhaust muffler pasted with high temperature-resistant sound-absorbing layer and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] refer to Figure 1 ~ Figure 4 , an automobile exhaust muffler pasted with a high-temperature-resistant sound-absorbing layer, comprising an exhaust pipe 1 and a housing, the housing comprising a cylinder shell 2, a left cover 2a and a right cover 2b, the left cover 2a and the The left end opening of the cylinder shell 2 is sealed and connected, and the right cover plate 2b is sealed and connected with the right end opening of the cylinder shell 2. The exhaust pipe 1 passes through the holes of the left cover plate and the right cover plate in turn, and is located in the cylinder There are at least two through holes on the pipe wall of the exhaust pipe in the shell 2, and the inner wall of the shell is coated with a high temperature resistant adhesive layer 4, on which a high temperature resistant sound-absorbing Material layer 3.

[0029] Further, the surface of the high-temperature-resistant sound-absorbing material layer 3 is in the form of pores, bumps or hair bundl...

Embodiment 2

[0039] refer to Figure 1 ~ Figure 4 , a method of manufacturing an automobile exhaust muffler pasted with a high-temperature-resistant sound-absorbing layer, the method of manufacturing comprises the following steps:

[0040] (1) Clean and dry the inner surface of the shell;

[0041] (2) Spraying a high-temperature-resistant adhesive on the inner wall surface of the shell to form a high-temperature-resistant adhesive layer;

[0042] (3) Paste a heat-resistant sound-absorbing material layer on the high-temperature-resistant adhesive layer, and solidify and form it.

[0043] The manufacturing method further includes the step: (4), drying and curing the high-temperature-resistant sound-absorbing material layer, using an airflow drying method with a drying temperature of 50-155°C.

[0044] The high-temperature-resistant sound-absorbing material layer is high-temperature-resistant inorganic fibers, and the density of the high-temperature-resistant inorganic fibers is between 20 ...

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Abstract

The invention relates to a vehicle exhaust muffler pasted with a high temperature-resistant sound-absorbing layer, which comprises an exhaust pipe and a shell, wherein the shell comprises a barrel shell, a left cover plate and a right cover plate, the left cover plate and the opening at the left end of the barrel shell are hermetically connected, the right cover plate and the opening at the right end of the barrel shell are hermetically connected, the exhaust pipe sequentially penetrates through the holes of the left cover plate and the right cover plate, at least two through holes are arranged on the pipe wall of the exhaust pipe positioned in the barrel shell, a high temperature-resistant binder layer is coated on the inner wall of the shell, and a high temperature-resistant sound-absorbing material layer is pasted on the high temperature-resistant binder layer. The invention also provides a manufacturing method of the vehicle exhaust muffler pasted with the high temperature-resistant sound-absorbing layer. The invention has good sound-absorbing performance and simultaneously ensures lower engine power loss and low manufacturing cost.

Description

technical field [0001] The invention relates to an automobile exhaust muffler and a manufacturing method thereof. Background technique [0002] When the automobile engine is working, a large amount of high-temperature exhaust gas is discharged, accompanied by huge noise caused by pressure fluctuations. Among them, people are paying more and more attention to the noise pollution of automobile exhaust. Automobile exhaust mufflers must have two basic functions of high temperature resistance and noise reduction. The mufflers in the prior art all encounter a pair of contradictions, that is, improving the sound absorption performance of the muffler is often at the expense of increasing the exhaust back pressure (ie, increasing the engine power loss). Contents of the invention [0003] In order to overcome the shortcomings of the existing automobile exhaust muffler that the sound absorption performance and engine power loss cannot be taken into account and the cost is high, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N1/10F01N13/08
Inventor 谢伟东
Owner ZHEJIANG UNIV OF TECH
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