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第 43 卷 第 1 期 Vol. 43, No. 1
2024 年 1 月 Journal of Applied Acoustics January, 2024
⋄ 研究报告 ⋄
某商用车怠速油底壳异响问题分析 ∗
徐小翔 1,2† 李 超 1,2 曾小春 1,2 王 毅 1,2 陈齐平 3
(1 江铃汽车股份有限公司产品研发总院 南昌 330001)
(2 江西省汽车噪声与振动重点实验室 南昌 330001)
(3 华东交通大学 载运工具与装备教育部重点实验室 南昌 330013)
摘要:针对产品开发过程中某柴油车型发动机油底壳怠速时 “呜呜” 异响问题,通过噪声与振动的测试及仿真
分析,对油底壳异响原因进行分析。结果表明,怠速时机油泵的工作激励频率与油底壳模态频率耦合,形成 “呜
呜” 声,并通过油底壳表面辐射出来。进一步实验研究表明,随着机油温度的升高,机油泵功率、工作激励幅值
会逐步减小,异响逐步减小。同时实验研究表明,机油量对油底壳模态频率有影响,油底壳内机油加注量越多,
油底壳模态频率越低,油底壳表面振动幅值及异响均逐步减小。针对该异响问题,明确该发动机机油加注上限
及下限时油底壳对应频率范围后,通过优化怠速转速,提高油底壳模态频率等使机油泵激励频率与油底壳模
态频率避频,解决了该异响问题。
关键词:油底壳;机油泵;异响
中图法分类号: TK421.6 文献标识码: A 文章编号: 1000-310X(2024)01-0076-06
DOI: 10.11684/j.issn.1000-310X.2024.01.009
Analysis and research on abnormal noise of idle oil pan of
a commercial vehicle
XU Xiaoxiang 1,2 LI Chao 1,2 ZENG Xiaochun 1,2 WANG Yi 1,2 CHEN Qiping 3
(1 Product R&D Institute, Jiangling Motors Corporation, Limited, Nanchang 330001, China)
(2 Jiangxi Provincial Key Laboratory of Automotive Noise and Vibration, Nanchang 330001, China)
(3 Key Laboratory of Conveyance and Equipment Ministry of Education,
East China Jiaotong University, Nanchang 330013, China)
Abstract: In order to solve the problem of “whine” abnormal noise of the engine oil pan at idle speed of a diesel
model in the process of product development, the cause of abnormal noise of the oil pan was analyzed through
noise and vibration test and simulation analysis. The results show that the working excitation frequency of
the oil pump at idle speed is coupled with the modal frequency of the oil pan, forming a “whine” sound, which
radiates through the surface of the oil pan. Further experimental research shows that with the increase of oil
temperature, the power and working excitation amplitude of oil pump will gradually decrease, and the abnormal
sound will gradually decrease. At the same time, the experimental research shows that the oil quantity has
an influence on the oil pan mode. The more oil filling in the oil pan, the lower the oil pan mode, and the
vibration amplitude and abnormal sound of the oil pan surface gradually decrease. In view of the abnormal
sound problem, the corresponding frequency range of the oil pan when the upper and lower limits of the engine
oil filling are defined, and the frequency avoidance of the oil pump excitation frequency and the oil pan mode
frequency is solved by optimizing the idle speed and improving the oil pan mode.
Keywords: Oil pan; Oil pump; Abnormal noise
2022-08-22 收稿; 2022-10-08 定稿
江西省汽车噪声与振动重点实验室开放课题资助项目 (JXNVHKB-KFKT-201804)
∗
作者简介: 徐小翔 (1990– ), 男, 江西南昌人, 硕士, 研究方向: 发动机 NVH 开发。
† 通信作者 E-mail: xxu21@jmc.com.cn