四驱纯电动车型加速性能优化分析

Analysis of Acceleration Performance Optimization on Four-wheel Drive Battery Electric Vehicle

文章基于量产状态纯电动四驱车型,进行加速性能提升,以达到赛道版本车型加速目标。在整车架构基本固定的情况下,通过优化电机可用的电流上限、实际场地测试标定起步前电机扭矩上限阈值、更换半热熔轮胎、轮毂轻量化、以及热胎改善起步打滑时间的方法。在提出方案的初期通过仿真软件计算各个方案对百公里加速时间减少量,再由实车场地现场标定确认标定值,最终测试百公里加速时间缩短0.4s,可达到3.5s,在同级别纯电动车型百公里加速性能方面,达到领先水平。同时在后续开发中,为加速性能提升积累了整车子系统开发方案,并且完善了轮胎-地面模型的实测数据积累,对整车动力性能开发具有一定的借鉴意义。

Based on the mass production battery electric four-wheel drive model,the acceleration performance is improved to achieve the acceleration target of the track version model.Under the condition that the vehicle architecture is basically fixed,the method of optimizing the current limit of the motor,the actual site test calibration of the motor torque limit before starting,the replacement of the semi-hot melt tire,the lightweight of the wheel hub,and the hot tire can improve the starting skid time.At the beginning of the proposal,simulation software is used to calculate the reduction of 100 km acceleration time of each plan,and then the calibration value is confirmed by on-site calibration at the real vehicle site.In the final test,the 100 km acceleration time is shortened by 0.4 s to 3.5 s,reaching the leading level in the 100 km acceleration performance of battery electric models of the same class.At the same time,in the follow-up development,in order to accelerate the performance improvement,the development scheme of the vehicle subsystem is accumulated,and the accumulation of the measured data of the tire-ground model is improved,which has certain reference significance for the development of the vehicle dynamic performance.