Internal combustion engine exhaust silencer capable of automatically following two working conditions

An exhaust muffler, automatic follow-up technology, applied in the direction of machine/engine, muffler, mechanical equipment, etc., to reduce exhaust noise

Active Publication Date: 2017-03-22
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] As the working conditions of the internal combustion engine are different, the muffler of the present invention can correspond to different resonance frequencies respectively, and can meet the noise reduction requirements under the two working conditions of idling speed and high speed, and can solve the problem that the existing resonance cavity muffler only needs one working condition. The noise can effectively eliminate the problem of noise

Method used

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  • Internal combustion engine exhaust silencer capable of automatically following two working conditions
  • Internal combustion engine exhaust silencer capable of automatically following two working conditions
  • Internal combustion engine exhaust silencer capable of automatically following two working conditions

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Embodiment Construction

[0029] Refer below image 3 , 4 The exhaust muffler that automatically follows the two working conditions of the internal combustion engine of the present invention will be further described.

[0030] The exhaust muffler of the present invention, which automatically follows the two working conditions of the internal combustion engine, comprises a section of pipeline 1 and a first airtight resonant cavity 21 outside the pipeline 1 . The first circular hole 13 is opened on the wall of the pipeline 1, and the first circular hole 13 communicates with the inner cavity of the pipeline 1 and the first resonance cavity 21; on the inner wall of the pipeline 1 opposite to the first circular hole 13 A first cylinder 11 is provided, and the first cylinder 11 extends into the first circular hole 13 ; the expansion coefficient of the material used for the first cylinder 11 is smaller than that of the material used for the pipe 1 and the first resonant cavity 21 .

[0031] A second resonan...

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Abstract

An internal combustion engine exhaust silencer capable of automatically following two working conditions comprises a pipe 1 and a sealed first resonant cavity 21 outside the pipe 1, and is characterized in that a first round hole 13 is formed in a wall surface of the pipe 1, and communicates with a cavity of the pipe 1 and the first resonant cavity 21; a first cylinder 11 is arranged on the inner wall, which is opposite to the first round hole 13, of the pipe 1, and extends into the first round hole 13; and the expansion coefficient of the material of the first cylinder 11 is smaller than the expansion coefficient of the materials of the pipe 1 and the first resonant cavity 21.

Description

technical field [0001] The invention relates to an exhaust muffler for an internal combustion engine. [0002] technical background [0003] Construction machinery and vehicles widely use internal combustion engines as power. In recent years, people have become more and more strict on the vibration and noise control of internal combustion engines. Noise control has gradually become a technical barrier for related products to enter the market. The noise of the internal combustion engine mainly comes from the exhaust noise of the engine. The most common way to reduce the exhaust noise is to install an exhaust muffler in the exhaust pipe system of the engine. The exhaust muffler can not only allow the airflow to pass smoothly, but also effectively prevent Or weakening the outward propagation of sound energy is a simple and effective method to control exhaust noise. It has been widely used in noise control engineering. There are many types of mufflers, which can be divided into...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N1/02
CPCF01N1/02
Inventor 翁泽宇余来娟胡世鸣王喆卢波游红武胡夏夏刘红丁红钢
Owner ZHEJIANG UNIV OF TECH
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