排气系统对车辆怠速噪声贡献的研究

Study on the contribution of exhaust system to vehicle idling noise

随着汽车的NVH性能(噪声Noise、振动Vibration及声振粗糙度Harshness)备受消费者的青睐。本文详细阐述了排气系统的问题查找、试验验证、原因分析和优化方案的制定及验证,从排气系统的前消声器、主管、后消声器及尾管等方面制定优化方案和措施,在此同时还兼顾考虑了排气系统高频气流噪声性能、总体布置要求和排气系统背压技术指标。将某SUV车辆的怠速噪声得到非常明显的改善。

As auto Harshness(NVH) performance(Noise, Vibration Noise Vibration and acoustic Vibration roughness Harshness) accept consumer favour.This paper expounds the problem of exhaust system, test validation, cause analysis and optimization of the consultation and validation, from the head of the exhaust system, the former muffler, and muffler and tail pipe after formulation optimization schemes and measures, at the same time also considered both the high frequency air exhaust system noise performance, overall layout requirements and exhaust system back pressure.Will a SUV vehicle idle noise is very obvious improvement.