中文摘要：

双模行星耦合式油电混合动力系统由两组或三组行星排构成，通过对离合器的控制实现输入分流式和复合分流式的切换,使得系统在全速比范围内效率较优。文章分析了现有不同类型功率分流式混合动力装置的输出特性与系统匹配参数关系，论证双模行星耦合式混合动力系统的优越性，提出了两种易于结构化实现的系统构型，以杠杆法为基础、以系统效率为优化目标进行了参数化设计。

英文摘要：

Dual mode planetary coupling type oil electricity hybrid power system is made up of two or three groups ofplanetary rows, it can switch between input split type and compound split type through controlling clutches, which makes thesystem efficiency optimalin full speed range. This paper analyzes the output characteristics and system parameters matchingof existing different types of power-split hybrid power devices, demonstrates the superiority of dual-mode planetary couplinghybrid system, designs two structure which is easy to realize the configuration, using the lever method as foundation, usingthe system efficiency as the target to optimizethe parametric design.