主办：陕西省汽车工程学会
ISSN 1671-7988  CN 61-1394/TH
创刊：1976年
Automobile Applied Technology

Automobile Applied Technology ›› 2022, Vol. 47 ›› Issue (12): 83-88.DOI: 10.16638/j.cnki.1671-7988.2022.012.017

• Design and Research • Previous Articles    

Cause Analysis and Improvement of Exhaust System Whistling of a Vehicle

LIU Guobin1 , CHEN Zhujian1, LI Yun2 , HUANG Linghe1, ZHONG Jiande1, LI Haichao1   

  1. 1.Liuzhou Kaiyue Technology Company Limited; 2.Dongfeng Liuzhou Motor Company Limited,
  • Online:2022-06-30 Published:2022-06-30
  • Contact: LIU Guobin

某乘用车排气系统啸叫原因分析及改善

刘国彬 1，陈祝健 1，李 云 2，黄灵河 1，钟建德 1，李海潮 1   

  1. 1.柳州铠玥科技有限公司；2.东风柳州汽车有限公司
  • 通讯作者: 刘国彬
  • 作者简介:刘国彬（1989—），男，工程师，研究方向为整车 NVH 仿真分析、车辆动力学，E-mail：916606979@qq.com。

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Abstract: During the development of a front engine front drive SUV, there is a clear whistling sound in the car with engine speed over 4 000 r/min under full throttle acceleration. After investigation tests and computational fluid dynamics analysis of the front muffler, it is determined that the whistling is caused by an opening in the intubation of the front muffler. Combining with the results of computational fluid dynamics analysis, the optimization scheme is proposed and verified on the real vehicle. It is proved that the whistling is improved significantly, which provides a reference for solving similar problems.

Key words: Acceleration condition; Exhaust system; Whistling; CFD

摘要： 某前置前驱 SUV 在开发过程中，全油门加速工况下，发动机转速 4 000 r/min 以上车内 有明显啸叫声。经排查试验以及对前消进行计算流体力学分析，确定啸叫为前级消声器内插 管上开孔所导致。结合计算流体力学分析结果，提出了优化方案，并进行实车验证。经验证， 啸叫问题得到明显改善，为同类问题的解决提供了参考。

关键词: 加速工况；排气系统；啸叫问题；计算流体力学