Intake silencer

Abstract

The invention discloses an intake silencer. The intake silencer comprises a Helmholtz resonance noise elimination mechanism which is provided with an air intake channel, a communicating pipe and a resonance chamber; a high frequency noise elimination unit which is fixedly arranged on the inner wall of the resonance chamber comprises a closed chamber filled with liquid; a part or all of a wall body of the closed chamber is a film body which is capable of guiding vibration and contacts with the liquid; and the Helmholtz resonance noise elimination mechanism is provided with the high frequency noise elimination unit. According to the intake silencer, attenuation and absorption are performed on high frequency noise through vibration of the film body and vibration of the liquid in the closed chamber to achieve the absorption for high frequency and low frequency noise; the high frequency noise elimination unit is located inside the resonance chamber, so that the structure of the high frequency noise elimination unit is compact at the same time; and the high frequency noise elimination unit causes no vortex to an air intake system of an engine, brings no change to the roughness of the inner wall of a pipeline of the air intake system and increases no intake pressure to the engine at the same time. The intake silencer is suitable for air intake systems of various vehicles to effectively absorb the high frequency and low frequency noise.

Description

technical field [0001] The invention relates to a muffler, in particular to an intake muffler with a Helmtz resonance muffler mechanism. Background technique [0002] The Helmtz resonant muffler mechanism is widely used in the intake muffler of vehicles. When the flow channel moves, the gas in the connecting pipe reciprocates like a piston under the pressure of sound waves. When its frequency is the same as that of the resonant cavity, it will resonate to achieve the purpose of noise reduction. The Helmtz resonance noise reduction mechanism can eliminate low frequency Noise, but there is nothing to do about high-frequency noise. It is often necessary to set up a corresponding high-frequency noise reduction mechanism in the intake system, and setting too many noise reduction mechanisms will make the intake system difficult to layout, and at the same time affect the intake pressure of the engine. . Contents of the invention [0003] The technical problem to be solved by th...

AI Technical Summary

Problems solved by technology

[0002] The Helmtz resonant muffler mechanism is widely used in the intake muffler of vehicles. When the flow channel moves, the gas in the connecting pipe reciprocates like a piston under the pressure of sound waves. When its frequency is the same as that of the resonant cavity, it will resonate to achieve the purpose of noise reduction. The Helmtz resonance noise reduction mechanism can eliminate low frequency Noise, but there is nothing to do about high-frequency noise. It is often necessary to set up a corresponding high-frequency noise reduction mechanism in the intake system, and setting too many noise reduction mechanisms will make the intake system difficult to layout, and at the same time affect the intake pressure of the engine.

Images