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Helmholtz silencer for automobile air inflow and exhaust debugging

A technology of muffler and muffler chamber, applied in intake muffler, combustion air/combustion-air treatment, muffler device, etc., can solve the problem of high cost of intake and exhaust debugging, single frequency of Helmholtz muffler, not arbitrary Changes and other issues to achieve the effect of shortening the development time cycle, saving manufacturing costs, and reducing costs

Inactive Publication Date: 2018-02-02
SAIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem solved by the invention is that the frequency of the existing Helmholtz muffler used for automobile air intake and exhaust adjustment is single and cannot be changed arbitrarily, resulting in high cost of air intake and exhaust adjustment

Method used

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  • Helmholtz silencer for automobile air inflow and exhaust debugging
  • Helmholtz silencer for automobile air inflow and exhaust debugging

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Embodiment Construction

[0017] In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0018] refer to figure 1 , A Helmholtz muffler for vehicle air intake and exhaust debugging includes: a housing 1 with a muffler cavity 11 and a connecting pipe 2 located outside the muffler cavity 11 and communicated with the muffler cavity 11 . The Helmholtz muffler further includes an adjustment part 3, and the adjustment part 3 has a plurality of adjustment positions, and corresponding to the plurality of adjustment positions, the muffler cavity 11 has different volumes.

[0019] According to the frequency formula of the anechoic cavity 11: Where f is the frequency, and V is the volume of the muffler cavity 11 . In this technical solution, by changing the adjustment position of the adjustment part 3 , the volume V of the muffl...

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Abstract

The invention relates to a helmholtz silencer for automobile air inflow and exhaust debugging. The helmholtz silencer comprises a shell with a silencing cavity and a connecting pipe located outside the silencing cavity and communicating with the silencing cavity; the helmholtz silencer further comprises an adjusting part, wherein the adjusting part is provided with a plurality of adjusting positions, and the silencing cavity has different volumes correspond to the multiple adjusting positions; and / or, the shell is detachably connected with the connecting pipe so as to replace the connecting pipes with different lengths and / or different inner diameters. According to the technical scheme, frequency of the silencing cavity can be changed according to needs by utilizing a helmholtz silencer, aplurality of helmholtz silencer samples do not need to be manufactured, and optimal noise eliminating frequency is locked, therefore, manufacturing cost can be saved, the development time period canbe shortened, and cost for air inflow and exhaust debugging can be reduced.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a Helmholtz muffler used for debugging of the intake and exhaust of automobiles. Background technique [0002] In automobiles, the main function of the engine intake line is to provide clean air for the engine for full combustion. When the engine is working, the noise generated by the combustion of air in the engine will be transmitted through the intake and exhaust pipes, affecting the driving experience of passengers. With the development of science and technology and the improvement of living standards, people have higher and higher requirements for vehicle NVH (N refers to Noise, V refers to Vibration, and H refers to Harshness). Usually, the intake and exhaust pipes are bypassed or built-in with Helmholtz mufflers to reduce low-frequency noise. [0003] However, this Helmholtz muffler has a strong muffler frequency selectivity. This requires that the Helmholtz muffler...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N1/02F02M35/12
CPCF01N1/023F02M35/1261
Inventor 朱志文顾彦彭岳华夏云峰顾成
Owner SAIC MOTOR
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