混合动力汽车用行星齿轮结构参数优化及应用

Optimization and Application of Planetary Gear Set for Hybrid Electric Vehicle

摘要:

外齿圈和太阳轮的齿数之比是行星齿轮机构的特征参数,确定该参数是动力系统匹配的重要部分,故需对该特征参数进行优化.首先,分析混合动力汽车对动力部件的性能要求,进行动力部件的选型设计,并制定混合动力汽车能量分配策略;然后,对包含行星齿轮机构的整车动力系统进行动力学和运动学分析,确定其动力学微分方程,建立描述行星齿轮机构特征参数与动力部件的最高转速和整车设计最高车速的函数关系,并仿真寻优;最后,在Advisor中仿真验证.结果表明,整车匹配合理,验证了寻优方法的正确性.

Abstract:

This paper focuses on the characteristic parameter optimization of the planetary gear set (PGS),which is the teeth number ratio of the ring gear and the sun gear.And it is the critical part of the powertrain matching.At first,the power components were selected according to the vehicle performance and the criterions for the power components selection were presented.The energy management for the hybrid electric vehicle (HEV) was also formulated.Then the dynamics and the kinematic characteristics of the PGS were analyzed and the differential equations for the powertrain were constructed.A geometry technique was carried out for optimizing the characteristic parameter of the PGS.The result shows that there is a functional relationship among the optimized ratio,the vehicle maximum velocity and the maximum speed of all the power components.The simulation in the Advisor and the analysis show the match in the powertrain is reasonable.And the optimization method is validated.