Noise elimination system and noise elimination method for air inlet and exhaust system and vehicle

A technology of intake and exhaust and muffler, which is applied in the field of vehicles and can solve problems such as changing noise environments

Inactive Publication Date: 2019-11-01
ZHEJIANG GEELY NEW ENERGY COMML VEHICLES CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One purpose of the present invention is to solve the problem that the exhaust system in the prior art requires external sensors to test

Method used

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  • Noise elimination system and noise elimination method for air inlet and exhaust system and vehicle
  • Noise elimination system and noise elimination method for air inlet and exhaust system and vehicle

Examples

Experimental program
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Embodiment Construction

[0044] see figure 1 , in the intake and exhaust pipeline of the engine, when the engine is working, the air flow passes through the intake pipeline 60, and the flow route of the air in the intake pipeline 60 is as follows figure 1 As indicated by the arrow in the middle, the wall of the intake pipeline 60 collides, changing the flow field distribution of the air in the intake chamber 61 of the intake pipeline 60 , and generating vibration and noise.

[0045] see figure 1 and figure 2 , the muffler system 100 for the intake and exhaust system of the present invention is mainly composed of a signal acquisition unit, a control unit 30 and an execution unit 40 . Wherein, the signal collection unit is used for collecting the sound pressure signal in the air intake cavity 61 of the air intake pipeline. The control unit 30 is used to analyze the frequency spectrum of the collected sound pressure signal to obtain the actual peak frequency in the intake cavity 61, compare the actua...

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PUM

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Abstract

The invention provides a noise elimination system and noise elimination method for an air inlet and exhaust system and a vehicle. The noise elimination system comprises a signal acquisition unit, a control unit and an execution unit, wherein the signal acquisition unit is used for acquiring sound pressure signals in an air inlet cavity of an air inlet pipeline, the control unit is used for carrying out frequency spectrum analysis on the sound pressure signals so as to obtain an actual peak frequency in the air inlet cavity, comparing the actual peak frequency with a preset peak frequency of the control unit, and sending a corresponding control instruction according to the comparison result. The execution unit can adjust the size of an expansion cavity of a silencer of the noise eliminationsystem according to the control instruction, the purpose of automatic noise elimination and noise reduction is reached. The noise elimination system is provided with the signal acquisition unit, thesound pressure signals in the air inlet pipeline are collected, and the sound pressure signals can be automatically adjusted according to the actual variable noise environment, so that the purpose ofautomatically carrying out noise elimination and noise reduction is achieved.

Description

technical field [0001] The invention relates to the technical field of vehicle accessory manufacturing, in particular to a noise reduction system for an intake and exhaust system, a noise removal method and a vehicle with the noise reduction system. Background technique [0002] In the performance test of the whole vehicle, there is a big problem of vibration and noise in the intake and exhaust system. After the engine state is determined, the noise of the intake and exhaust system cannot be reduced by adjusting the engine end, so the importance of reducing the noise of the intake and exhaust ports through the adjustment of the intake and exhaust system itself is self-evident. [0003] At present, the existing intake and exhaust systems do not have their own acoustic sensors. For noise problems, the vibration / noise test of the intake and exhaust system is carried out through external sensors, and then the muffler is selected through frequency analysis. or structural design....

Claims

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Application Information

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IPC IPC(8): F02M35/12F02M35/10F01N13/00F01N13/08F01N1/16
CPCF01N1/161F01N1/166F01N13/007F01N13/008F01N13/08F02M35/10091F02M35/10295F02M35/10373F02M35/1222F02M35/1233F02M35/1294
Inventor 褚淑敏蔡文远王洋张振颜廷皓
Owner ZHEJIANG GEELY NEW ENERGY COMML VEHICLES CO LTD
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