摘要
针对无变速器纯电动汽车动力系统的特点,提出了一种在整车设计前期基于加速性能要求可快速、准确获得整车预期加速曲线的方法。首先,分析了已有加速曲线拟合方法的不足,进而通过理论分析和推导提出了无变速器纯电动汽车加速曲线分段拟合方法,并对分析过程中假设的合理性进行了进一步论证。然后,根据获得的加速曲线进行实车匹配验证,结果显示,匹配得到的电机峰值功率与实际使用的电机峰值功率的误差为1.4%,这充分证明了本文加速曲线拟合方法的合理性和准确性。本文方法发展并完善了参数匹配理论,揭示了动力源与加速特性的内在联系,对整车设计前期的电机选定具有重要指导意义。
Regarding the characteristics of the pure electric vehicle power system without transmission,a method for quickly and accurately obtaining the expected acceleration curve of the vehicle is proposed,which is based on the requirement of acceleration performance in the early stage of vehicle design.First,the shortcomings of the existing acceleration curve fitting method are analyzed.Based on this,not only the segmentation fitting method of acceleration curve of pure electric vehicle without transmission is put forward through theoretical analysis and deduction,but also the rationality of the hypothesis in the analysis process is further demonstrated.Then,according to the obtained acceleration curve,the real vehicle matching verification is carried out.The results show that the error between the peak power of the matched motor and the peak power of the actually used motor is 1.4%,which fully proves the rationality of the proposed acceleration curve fitting method and the accuracy of the fitting.The segmentation fitting method of acceleration curve develops and perfects the parameter matching theory,reveals the internal relationship between power source and acceleration characteristics,and has important guiding significance for motor selection in the early stage of vehicle design.
作者
曾小华
纪人桓
宋大凤
王恺
牛超凡
ZENG Xiao-hua;JI Ren-huan;SONG Da-feng;WANG Kai;NIU Chao-fan(State Key Laboratory of Automotive Simulation and Control,Jilin University,Changchun 130022,China)
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2020年第3期804-811,共8页
Journal of Jilin University:Engineering and Technology Edition
基金
国家重点研发计划项目(2018YFB0105900).
关键词
车辆工程
电动汽车
加速曲线
参数匹配
动力性
vehicle engineering
electric car
acceleration curve
parameter matching
power performance
