CAJ | 학술논문

为研究不同自动变速器匹配对电动汽车能耗的影响,利用Simulink平台建立LF620纯电动汽车模型,并通过实车测试数据验证了模型的合理性。在此基础上以整车原地起步加速时间为动力性约束,以3种典型循环工况综合能耗最低为目标,对不同自动变速器速比和换挡控制策略进行优化。最后基于优化速比分析了不同自动变速器匹配对电动汽车能耗的影响。结果表明,相比于单挡变速器,使用两挡和3挡自动变速器可降低电动汽车对驱动电机的要求和整车能耗。另外,在传动效率相同的情况下,CVT的能耗要低于其他变速器。
위연구불동자동변속기필배대전동기차능모적영향,이용Simulink평태건립LF620순전동기차모형,병통과실차측시수거험증료모형적합이성。재차기출상이정차원지기보가속시간위동력성약속,이3충전형순배공황종합능모최저위목표,대불동자동변속기속비화환당공제책략진행우화。최후기우우화속비분석료불동자동변속기필배대전동기차능모적영향。결과표명,상비우단당변속기,사용량당화3당자동변속기가강저전동기차대구동전궤적요구화정차능모。령외,재전동효솔상동적정황하,CVT적능모요저우기타변속기。
In order to investigate the effects of the matching of automatic transmissions on the energy con-sumption of electric vehicle, a model for LF620 electric vehicle is developed with Simulink platform and validated by comparing simulation results with experimental data. Then an optimization is conducted on the speed ratio and shift schedule of transmission with minimizing the compromised energy consumption with three typical driving cycles as objective and the acceleration time with standing start as power performance constraint. Finally the effects of dif-ferent transmission configurations on vehicle energy consumption are analyzed based on optimized speed ratio. The results indicate that electric vehicles with 2-speed and 3-speed transmission can reduce energy consumption and the requirements on drive motor, compared with single speed. And under same transmission efficiency, CVT has the least energy consumption.