an intake muffler

Abstract

The invention discloses an air intake muffler, which is installed in front of an engine intake manifold, and comprises a cavity (3), an air inlet (1) and an air outlet arranged on the cavity (3) and connected to an intake pipe (2), the cavity (3) is divided into the upper cavity (31) and the lower cavity (32) by the interlayer plate, and the upper cavity (31) and the lower cavity (32) are provided with multiple chamber with microperforations. The intake muffler of this invention has a simple structure, is directly connected with the intake system, is easy to install, takes up little space, and can attenuate intake noise of different frequencies to reduce the impact of intake noise on the noise inside and outside the car, improving the Vehicle NVH performance.

Description

technical field [0001] The invention belongs to the field of automobile manufacturing and relates to improving high-frequency noise of intake air, and more specifically relates to an intake muffler for the intake noise of a supercharged engine. Background technique [0002] In the vehicle noise, the intake noise is one of the main noises, especially for a vehicle with a supercharged engine, the intake noise often has a greater impact on the NVH of the vehicle. The filter cannot completely eliminate the peaks of these frequency bands. The traditional solution is to add a 1 / 4 wavelength tube or a resonant cavity in the intake system. This method can only eliminate the peaks of a certain frequency. For supercharged engines, further Air noise has a wide range of high-frequency areas and many peaks. If the traditional method is used to arrange multiple wavelength tubes or resonant cavities to eliminate multiple frequency bands, it is often impossible to achieve due to space const...

AI Technical Summary

Problems solved by technology

[0002] In the vehicle noise, the intake noise is one of the main noises, especially for a vehicle with a supercharged engine, the intake noise often has a greater impact on the NVH of the vehicle. The filter cannot completely eliminate the peaks of these frequency bands. The traditional solution is to add a 1 / 4 wavelength tube or a resonant cavity in the intake system. This method can only eliminate the peaks of a certain frequency. For supercharged engines, further Air noise has a wide range of high-frequency areas and many peaks. If the traditional method is used to arrange multiple wavelength tubes or resonant cavities to eliminate multiple frequency bands, it is often impossible to achieve due to space constraints, so the most important peaks can only be selectively eliminated.

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