面向经济性最优的电动汽车转矩动态分配策略研究  

Research on Dynamic Torque Distribution Strategy of Electric Vehicles for Optimal Economy

作　　者：殷广 朱晨迪 余旭东 刘洋 范盼 YIN Guang;ZHU Chendi;YU Xudong;LIU Yang;FAN Pan(Ningbo Institute of Dalian University of Technology(Ningbo,Zhejiang),315000,China;Geely Automobile Research Institute,Ningbo Co.,Ltd.)

机构地区：[1]大连理工大学宁波研究院,浙江宁波315000 [2]吉利汽车研究院(宁波)有限公司

出　　处：《小型内燃机与车辆技术》2024年第4期1-7,共7页Small Internal Combustion Engine and Vehicle Technique

摘　　要：为了提高四驱电动汽车的整车能效,提出了根据电机系统效率最优法进行前后电机转矩动态分配的策略。在Cruise中建立了整车仿真模型,在Simulink中搭建了转矩分配策略模型,通过联合仿真计算了不同车速、不同轮端转矩下的前后电机转矩分配与电耗。通过对多种转矩分配策略计算结果的对比分析以及对试验车辆在测试场地的实测数据与仿真结果的对比分析,证明了所提出的转矩动态分配策略是可行的。另外,探讨了四驱车型在低转矩阶段采用脱开装置之后,电机效率提高和整车电耗降低的可行性。To enhance the vehicle energy efficiency of four-wheel-drive electric vehicles,a strategy for dynamic torque distribution between the front and rear motors based on the optimal efficiency of the motor system is put forward.The vehicle simulation model is constructed in CRUISE,and the torque distribution strategy model is established in Simulink.The distribution of front and rear motor torques and power consumption under various vehicle speeds and different wheel-end torques are calculated through co-simulation.Through the comparative analysis of the calculation results of multiple torque distribution strategies and the comparison between the measured data of the test vehicle on the test site and the simulation results,it is verified that the proposed dynamic torque distribution strategy is feasible.Additionally,the feasibility of enhancing the motor efficiency and reducing the vehicle power consumption after adopting the disengagement device in the low-torque stage of the four-wheel-drive vehicle model is discussed.

关 键 词：四驱电动汽车 电机效率 联合仿真 转矩动态分配策略 

分 类 号：U469.72[机械工程—车辆工程]