电动汽车全油门加速整车抖动问题试验研究  

Experimental Study on Jitter of Electric Vehicle Accelerating with Full Throttle

作　　者：吴继辉 张永 杨少华 李运志 WU Jihui;ZHANG Yong;YANG Shaohua;LI Yunzhi

机构地区：[1]合众新能源汽车有限公司汽车工程研究院

出　　处：《汽车工程师》2021年第4期51-54,共4页Automotive Engineer

摘　　要：文章以电动汽车全油门加速工况下整车抖动问题为研究对象,通过分析识别主要激励为半轴的轴向派生力引发0.39阶。针对三球销式万向节进行运动学受力分析及理论推导,得出半轴当量夹角与轴向派生力相关。最后基于工程实际,将半轴当量夹角从7°降低至4.1°,优化后整车全油门加速工况下整车振动加速度峰值下降60.68%~70.08%,整车舒适性极大改善。The vehicle jitter problem under full throttle acceleration condition of electric vehicle is taken as the research object.By analyzing and identifying the axial derived force which is the main excitation of the half-axle,it initiates order 0.39.Based on the kinematics analysis and theoretical derivation of the three-ball pin universal joint,it is concluded that the equivalent Angle of the half-shaft is positively correlated with the axial derived force.Finally,based on the engineering practice,the equivalent Angle of half axle is reduced from 7°to 4.1°.After optimization,the peak vibration acceleration of the whole vehicle under the condition of full throttle acceleration is reduced by 60.68%~70.08%,and the comfort of the whole vehicle is greatly improved.

关 键 词：电动汽车 阶次 隔振率 模态 NVH 

分 类 号：U467[机械工程—车辆工程] U469.72[交通运输工程—载运工具运用工程]