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Acoustic resonator

A technology of resonator and resonant cavity, which is applied in the direction of machines/engines, noise reduction devices, engine components, etc., can solve the problems of bulky equipment and achieve the effect of large damping range

Pending Publication Date: 2020-08-11
AKWEL SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This device proved to be particularly cumbersome

Method used

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  • Acoustic resonator
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Examples

Experimental program
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Embodiment Construction

[0048] figure 1An acoustic wave resonator for attenuating noise according to a first embodiment of the present invention is shown in . This resonator is indicated by the general reference numeral 10 .

[0049] The invention has more particular but not exclusive application to attenuating acoustic disturbances for fluid flow within duct 100 , such as the flow of intake air and / or exhaust air. This duct 100 is preferably substantially tubular and has a reference axis X. Of course, conduit 100 may alternatively comprise a different shape, such as a curved or S-shaped tubular shape, or the like.

[0050] For example, duct 100 is an intake duct of an intake system of an internal combustion engine of a motor vehicle. This duct 100 delimits an internal channel 110 for fluid flow, having a reference axis X and having a substantially tubular general shape around this axis X.

[0051] exist figure 1 In the first embodiment shown, a resonator 10 is mounted to a conduit 100 and inclu...

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Abstract

A resonator 10 is configured to attenuate the noise in a duct 100 delimiting an internal channel 110 for the flow of a fluid according to a reference axis X, the resonator of the type including an annular compartment 12 configured to extend around the channel 110 and provided with at least one orifice 14 forming a neck for communication with the flow channel 110 so as to form a resonance chamber 16. Accordingly, the compartment 12 has an inner structure 18 with a geometry shaped so as to produce a revolution annular asymmetry of the resonance chamber 16 about the reference axis, adapted to generate a phase shift of an acoustic pressure wave reflected inside the chamber 16 relative to an acoustic pressure wave incident from the main flow.

Description

technical field [0001] The present invention relates to an acoustic resonator suitable for installation in ducts for the flow of fluids, more particularly in ducts for gaseous fluids, and more particularly in the air intake and / or in the exhaust flow line. The invention also relates to a pipe comprising such an acoustic resonator. [0002] The invention applies more particularly, but not exclusively, to the technical field of heat engines equipped with turbochargers for compressing intake air. Background technique [0003] In a manner known per se, many motor vehicles with gasoline or diesel engines are equipped with a turbocharger consisting of a first turbine driven by the exhaust gas of the engine, the first turbine being mounted on A second turbine on the same shaft rotates and compresses the air or air / gasoline mixture before it enters the engine. [0004] The advantage of this assembly is that it allows a significant increase in the power of the engine, but the rot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B37/00F01D25/00F02B77/00
CPCF02B37/00F01D25/00F02B77/00F01N1/02F01N1/023F01N1/026F02M35/1216F02M35/1255F02M35/1266Y02T10/12
Inventor 帕斯卡尔·盖里阿德里安·厄斯塔什米歇尔·罗比诺
Owner AKWEL SA