Abstract： To investigate a powersplit hybrid electric vehicle (HEV), the lever method was used to analyze the dynamic behavior of the power coupling mechanism, and the ratio of the motor speed, torque and power to the engine was obtained. The ratio of transmission efficiency to electric power of the vehicle was calculated, and the power split and circulation phenomena were analyzed. To avoid power circulation phenomenon and ensure high transmission efficiency of the vehicle, the mechanical point(MP) control strategy was formulated, and the optimal switching threshold K value was optimized. The dualplanetary HEV model was built on the AVL/Cruise platform, and the whole vehicle energy management strategy was built in MATLAB/Simulink. The control strategies were simulated and verified under NEDC cycle condition. The results show that compared with the OOL control strategy, the MP control strategy can guarantee the higher efficiency of transmission system with state of charge(SOC) kept in good scope, and the equivalent fuel consumption per hundred kilometers of HEV is decreased by 8.5% with effectively improved fuel economy.
汪少华, 李佳芯, 施德华, 孙晓强. 基于传动效率最优的功率分流式混合动力汽车控制[J]. 江苏大学学报（自然科学版）, 2018, 39(6): 621-627.
WANG Shaohua, LI Jiaxin, SHI Dehua, SUN Xiaoqiang. Control strategy of powersplit HEV based on optimal transmission efficiency
[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2018, 39(6): 621-627.
2018, Vol. 39 
