汽车工程

汽车工程 ›› 2020, Vol. 42 ›› Issue (3): 396-400.doi: 10.19562/j.chinasae.qcgc.2020.03.017

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发动机半阶次振动引起的车内声品质问题分析和改进

金岩1,2, 赵涛1   

  1. 1.中国汽车工程研究院股份有限公司,重庆 401122;
    2.汽车噪声振动和安全技术国家重点实验室,重庆 400039
  • 收稿日期:2019-01-25 出版日期:2020-03-25 发布日期:2020-04-16
  • 通讯作者: 金岩,高级工程师,E-mail:jinyan@caei.com.cn

Analysis and Improvement of the Quality of Vehicle Interior Sound Induced by the Half Order Vibration of Engine

Jin Yan1,2, Zhao Tao1   

  1. 1.China Automotive Engineering Research Institute Co., Ltd., Chongqing 401122;
    2.State Key Laboratory of Vehicle NVH and Safety Technology, Chongqing 400039
  • Received:2019-01-25 Online:2020-03-25 Published:2020-04-16

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摘要： 本文中对加速车内噪声的粗糙感进行了分析和改进。首先通过对加速车内噪声频谱特性的分析,确定了半阶次噪声是引起车内噪声粗糙感的主要原因。接着对可能的传递路径进行了排查,结果表明车内的半阶次噪声主要来自于动力总成的振动,并通过变速器悬置侧支架传递到车内。最后采用了降低动力总成悬置刚度和提高悬置支架动刚度的方案,有效减小了车内噪声的粗糙感,提高了整车加速噪声品质。

关键词: 车内噪声, 粗糙感, 半阶次噪声, 传递路径

Abstract: The roughness of vehicle interior noise during acceleration is analyzed and improved in this paper. Firstly through the analysis on the frequency characteristics of vehicle interior acceleration noise, the main cause of the roughness of vehicle interior noise is determined to be the half order noises. Then the possible noise transfer paths are investigated and the results show that the vehicle interior half order noises stem from the vibration of powertrain and transmit into the vehicle through the side bracket of transmission mounts. Finally improving schemes of reducing the stiffness of engine mounts and increasing the dynamic stiffness of the side bracket of transmission mounts are adopted. As a result, the roughness of vehicle interior noise is reduced and the quality of vehicle acceleration noise is enhanced

Key words: vehicle interior noise, roughness, half order noise, transmitting path