某两驱纯电乘用车差速器异响故障机理分析和解决  

Analysis and Optimization of Abnormal Steering Noise of a Two-wheel-drive Electric Passenger car

作　　者：陈辉 鲁方俊 程翔 吴桂义 CHEN Hui;LU Fangjun;CHENG Xiang;WU Guiyi(Wuxi CRRC-Hofer Powertrain Co.,LTD,Wuxi 214174,China)

机构地区：[1]无锡中车浩夫尔动力总成有限公司,无锡214174

出　　处：《车辆与动力技术》2024年第1期55-60,64,共7页Vehicle & Power Technology

摘　　要：在国家“碳达峰、碳中和”大背景下,纯电动汽车是未来汽车发展趋势,差速器是汽车转向系统的重要零件,其NVH性能好坏直接影响整车驾驶品质.文中基于解决工程上遇到的整车双扭线呜呜异响问题,通过对整车左、右半轴支架和电驱动差速器轴承壳体附件位置布置传感器,测量其振动和噪音信号并分析时域特征和音频数据,结合主观驾评结果,电驱动的差速器振动加速度出现瞬时冲击特征明显,差速器轴承壳体振动冲击幅值最大,同时结合电驱动总成台架故障复现测试,最终锁定电驱动差速器总成是造成整车双扭线呜呜异响的主要原因,制定优化策略并完成台架及整车验证,成功解决了问题.In the context of national"carbon peaking and carbon neutrality",electric vehicles are the future of automobiles.Differential is an important part of the automotive steering system,and its NVH performance directly affects the driving quality of the whole vehicle.When doing a lemniscate steering,noise was encountered in the test.To address the problem,sensors were arranged on the brackets of halfshafts on both sides and the accessories of the bearing housing of the electric drive.Vibration and noise signals were collected,then characteristics of those data were analyzed in the time domain as well as some audio data.Combined with evaluation during subjective driving,the instantaneous shock of the vibration acceleration of the electric drive differential are obvious,and the amplitude of vibration of the differential bearing housing is the largest.Tests were carried out to reproduce some failure in the electric driving assembly.Finally,locking the electric differential was found to be the main cause of the noise during lemniscate steering.Optimization strategy was formulated and bench test and vehicle verification were completed,which successfully solved this engineering problem.

关 键 词：差速器异响 行星齿轮 半轴齿轮 行星齿轮轴 垫片 金属摩擦声 

分 类 号：U467[机械工程—车辆工程]