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Automobile exhaust pipe noise elimination processing method

A technology for noise elimination and automobile exhaust, which is applied in the direction of mufflers, engine components, machines/engines, etc. It can solve problems such as limited scope of application, large power loss of mufflers, and short service life of mufflers, so as to reduce the residual air flow Possibility, effect of improving service life

Inactive Publication Date: 2014-10-29
CHENGDU XINGBODA PRECISION MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the production and processing of general mufflers, the resistive mufflers and resistive mufflers mainly used on the market can only deal with high-frequency or low-frequency noise separately, and the scope of application is not wide. In terms of: in high temperature, water vapor and gas that is corrosive to sound-absorbing materials, the service life of the muffler is short, and the effect on low-frequency noise is poor; the biggest disadvantage is that the power loss of the muffler is too large

Method used

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  • Automobile exhaust pipe noise elimination processing method

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Embodiment 1

[0021] Such as figure 1 As shown, the noise elimination processing method of the automobile exhaust pipe of the present invention includes the following steps. First, the airflow is introduced into the breather pipe 10 through the air inlet 3, and the pneumatic control valve 11 installed at the air inlet 3 can be adjusted according to the air flow. When the air flow exceeds a certain limit, the pneumatic control valve 11 opens, so that the air flow directly enters the space formed by the first partition plate 5 and the muffler chamber 2 from the air inlet 3. Part of the air flow enters the space between the second partition plate 5 and the baffle 6 through the connecting pipe 7, and the remaining part of the air flow is silenced step by step by the through holes 8 on the two partition plates 5. The air flow from the air inlet 3 suddenly enters from a small space environment into a larger space environment. Only a few frequency sound waves near the natural frequency of the throu...

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Abstract

The invention discloses an automobile exhaust pipe noise elimination processing method. The automobile exhaust pipe noise elimination processing method includes two continuous noise elimination processing processes, firstly, when the amount of airflow flowing inside through an air inlet is small, noise correspondingly generated by the airflow is low, a pneumatic control valve is directly closed, the airflow is directly exhausted through an air outlet via a breather pipe, the probability that the airflow is left in a noise elimination cavity is decreased, and the service life of a silencer can be prolonged.

Description

Technical field [0001] The invention relates to a muffler, in particular to a noise elimination processing method for automobile exhaust pipes. Background technique [0002] In the urban environment, traffic noise is the pollution source with the strongest radiation and the widest impact. In the noise of motor vehicles, exhaust noise is one of the main noise sources. Its reduction is mainly through the installation of exhaust mufflers, which will inevitably have a great impact on the engine; the power loss of general mufflers is 3%~8%. Larger power loss is allowed when the sound attenuation is large; the muffler matching low-power engine requires lower power loss. [0003] There are more and more cars in our country, people's requirements for cars are no longer just means of transportation, but also energy-saving, environmentally friendly, beautiful and comfortable. The traffic noise of motor vehicles is the main source of urban road noise, and the noise regulations for automobil...

Claims

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Application Information

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IPC IPC(8): F01N1/08F01N1/10
Inventor 吴光武
Owner CHENGDU XINGBODA PRECISION MACHINERY
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