关键词: 驻车系统；驻车操纵手柄；噪声性能；改进方案；改进效果

Abstract: With higher requirements for vehicle NVH, the NVH requirements for parking control handle are more and more strict. This paper expounds the noise types, generation principle, influence factors, optimization methods and cases of parking control handle. This paper mainly analyzes three kinds of common noises of parking control handle. For the tapping sound, the spring force of the button return spring is reduced from 11 N±1 N to 7 N±1 N by reducing the spring force of the button return spring. Increasing grease smear amount from 3 g to 6 g on both sides of pawl and gear plate, grease is imported grease, and knock sound is reduced from 58 dB to 55 dB. As for the unlocking noise, the unlocking noise was improved by wrapping rubber pad on the outside of the pawel limit structure. The iron touch of the pawel and the limit structure was changed to iron touch rubber. Through the verification of loading, the quality of the hard unlocking sound was significantly improved. As for drumming sound, the sound intensity and quality of drumming sound have been improved by wrapping bushing on the limit rivet, and the noise intensity has been reduced from 60 dB to 50 dB. After a series of measures, the noise of parking control handle has been greatly improved, and a good NVH effect has been obtained.

Key words: Parking system; Parking control handle; Noise performance; Improvement scheme; Improvement effect