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Automobile exhaust noise elimination structure

A technology of automobile exhaust and muffler, which is applied in the direction of exhaust devices, gas chambers, noise reduction devices, etc., to achieve the effects of improving sound quality, easy layout, and simple structure

Pending Publication Date: 2021-10-01
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The technical scheme disclosed in this patent document is a beneficial attempt in the technical field

Method used

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  • Automobile exhaust noise elimination structure
  • Automobile exhaust noise elimination structure
  • Automobile exhaust noise elimination structure

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Experimental program
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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] see figure 1 , figure 2 and image 3 , a car exhaust muffler structure shown, including a muffler shell 20 with an oval cross section, a left end cover 6 located at the left end of the muffler shell, a right end cover 7 located at the right end of the muffler shell, and an air intake The main pipe 1 and the exhaust main pipe 2 are characterized by:

[0021] A first partition 8 and a second partition 9 are arranged in the muffler housing 20, and the muffler housing is divided into a first chamber 11, a second chamber 12 and a third chamber 13; It is arranged between the left end cover 6 and the center rear part of the first partition 8 and communicates with the second chamber 12, and the exhaust main pipe 2 is arranged on the upper center of the first partition 8 and the second partition 9 between the parts and communicate with the second chamber 12;

[0...

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Abstract

The invention relates to an automobile exhaust noise elimination structure. The automobile exhaust noise elimination structure comprises a noise eliminator shell with an oval section, a left end cover arranged at the left end of the noise eliminator shell and a right end cover arranged at the right end of the noise eliminator shell. The automobile exhaust noise elimination structure also comprises an air inlet main pipe and an exhaust main pipe, and is characterized in that: a first partition plate and a second partition plate are arranged in the noise eliminator shell, so that the noise eliminator shell is divided into a first cavity, a second cavity and a third cavity; the air inlet main pipe is arranged between the left end cover and the rear portion of the center of the first partition plate and communicated with the second cavity; the exhaust main pipe is arranged between the upper portion of the center of the first partition plate and the upper portion of the center of the second partition plate and communicated with the second cavity; a throat pipe is inserted in the center of an outlet at the right end of the air inlet main pipe; the right end of the throat pipe is inserted into the third cavity; and the third cavity and the throat pipe form a first resonant cavity. According to the invention, under the condition that the overall noise elimination level is guaranteed, the problem of accelerated roar caused by two different low-frequency sounds is solved, and the acoustic quality of an automobile is improved.

Description

technical field [0001] The invention relates to an automobile exhaust system, in particular to an automobile exhaust muffler structure, in particular to a muffler structure for solving two different low-frequency roaring problems at an automobile exhaust port. Background technique [0002] Exhaust noise is one of the main noise sources of a vehicle, and the quality of the exhaust sound directly affects the acoustic quality of the vehicle. Restricted by chassis space layout, cost pressure, and weight, the muffler cannot be designed with a large volume. Therefore, in the case of limited volume, it is particularly important to design a muffler structure that can simultaneously solve the problem of low-frequency roar of multiple exhaust ports. [0003] At present, the main method to solve the problem of low-frequency roar at the exhaust port is to design a low-frequency resonant cavity inside the muffler. The low-frequency resonant cavity is mainly composed of a throat and a c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N13/00F01N1/02F01N1/24
CPCF01N13/007F01N1/02F01N1/24F01N2490/00
Inventor 张江生杨渝黎杰张海燕杨亮贾文宇庞剑黄永波陈思
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD