功率分流式混合动力汽车同时具备串联式和并联式混合动力汽车的优点，但单模功率分流混合动力汽车会产生较高的电损耗。提出一种双模功率分流机构以改善单模功率分流机构的电耗高的缺点，不同于传统多行星齿轮组和多离合器的双模功率分流机构，仅包含单行星齿轮组，利用同步器进行模式切换。使用基于全局优化能量管理策略的后向仿真方法，以燃油经济性为目标，对该功率分流机构和丰田混合动力系统（THS）进行动力传动系统参数优化，并对仿真结果进行能量流分析。结果表明，相较丰田混合动力系统，提出的功率分流机构能降低电损失。

This paper proposed a new power-split hybrid electrical powertrain to reduce electric loss of single-mode power split hybrid electric vehicle (PSHEV). Different from traditional dual-mode power split mechanism with multi-planetary gear set and multi-clutch, this powertrain is a dual-mode configuration with a single planetary gear set, realizing mode switching by a Synchronizer. The backward simulation method based on global optimization energy management strategy was used to optimize the parameters of the proposed powertrain and Toyota Hybrid System (THS). The optimization results analyzed by energy flow method show that the proposed power split powertrain can reduce the power loss compared with that of THS.

U27

国家自然科学基金资助项目（51675062）。