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Automobile muffler

A technology of automobile muffler and muffler cotton, which is applied to muffler devices, machines/engines, engine components, etc., can solve the problem of insufficient muffling effect and other problems, and achieve the effect of attenuating exhaust noise and reducing radiated noise.

Active Publication Date: 2013-01-09
LIUZHOU HENGZHUO AUTO PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the use of this technical solution, the automobile muffler has the following disadvantages: the noise reduction effect, especially the noise reduction effect of high-frequency noise, is not good enough

Method used

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  • Automobile muffler
  • Automobile muffler
  • Automobile muffler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] The present invention will be described in further detail below in conjunction with accompanying drawing:

[0014] Such as figure 1 , figure 2 , image 3 The automobile muffler shown has a shell that is connected by crimping between the cylinder body 8 and the front end cover 1 and the rear end cover 5; the cylinder body 8 is surrounded by overlapping two layers of steel plates, as Figure 4 As shown, the connecting longitudinal seam of the cylinder body 8 is surrounded by undercuts, that is, the first edge and the tail edge of the steel plate are connected by one of the sides biting into the groove formed by the other bent side, as shown in Figure 5 shown. In the shell, the front partition plate 2 with holes and the rear partition plate 7 are welded with the cylinder body 8 to divide the internal space into the first, second and third chambers in sequence along the air intake direction; Into the air intake pipe 9 inside the housing, the rear partition 7 seals the...

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Abstract

The invention discloses an automobile muffler, which comprises a shell, an air inlet pipe and an air outlet pipe, wherein the internal space of the shell is partitioned into a first cavity, a second cavity and a third cavity along an air inlet direction through a front perforated separation disc and a back perforated separation disc; the air inlet pipe and the air outlet pipe are arranged on the shell; the back separation disc is used for enclosing the inner end of the air inlet pipe; the pipe walls of the air inlet pipe in the first cavity and the second cavity are respectively distributed with a plurality of through holes; a part of the air outlet pipe in the shell is formed by connecting an air outlet section part which passes through the third cavity and the second cavity in sequence from the air outlet, a U-shaped pipe section part in the first cavity, and an air inlet section part passing through the second cavity; a plurality of muffling through holes are distributed in the pipe wall of the air outlet section of the air outlet pipe in the second cavity, and a jacket for enclosing the muffling through holes is arranged outside the pipe wall; and muffling cotton is arranged between the air outlet pipe and the jacket. Compared with the prior art, the automobile muffler has the advantages that the high and low-frequency noise is better attenuated, and the total noise is lowered by 2 decibels, from 73 decibels to 71 decibels.

Description

technical field [0001] The invention relates to the technical field of automobile manufacturing, in particular to a muffler for reducing engine exhaust noise pollution. Background technique [0002] As a key component to reduce the exhaust noise of the automobile engine, this muffler eliminates the noise by reducing and attenuating the exhaust pulsation pressure; there is a technical solution for a miniature van muffler: it includes a shell, which is installed in the shell The air inlet pipe and the air outlet pipe on the body, the inner space of the shell is divided into the first, second and third chambers along the air inlet direction by the front partition plate and the rear partition plate with holes, the air inlet pipe and the The air outlet pipes pass through the front partition and the rear partition in the casing, and the air inlet pipe and the air outlet pipe are provided with through holes on the pipe wall of the second chamber. [0003] This technical scheme au...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N1/10
Inventor 廖平魁郑杰
Owner LIUZHOU HENGZHUO AUTO PARTS
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