关键词: 涡轮增压器；Hiss 噪声；频谱分析

Abstract: With the increasing popularity of supercharged engines, the noise problem of superchargers has become increasingly prominent, especially Hiss noise, which has become a key and difficult problem in the industry. In order to solve the problem of Hiss noise of a certain type of engine turbocharger, this paper analyzes the generation mechanism of Hiss noise, identifies components with strong radiated noise through noise transmission path and frequency spectrum analysis, and acoustically wraps the turbine air intake pipe by making manual samples, it has been verified that the scheme is feasible. Finally, by changing the material of the intake pipe, making a quick sample, and verifying that the optimization scheme is feasible again, the Hiss noise can be solved. The research of this paper has important reference significance for solving the practical problems of noise, vibration, harshness (NVH) engineering.

Key words: Turbocharger; Hiss noise; Frequency spectrum analysis