混合动力汽车串并联模式切换控制研究

Research on Series-parallel Mode Switching Control of Hybrid Electric Vehicles

混合动力汽车有多个能量源,汽车控制器在不同的工况需要协调选择不同的能量进行驱动,而混合动力汽车既有串联模式驱动也有并联模式驱动,不同的驱动方式能量损耗不同,如何提升能量的传递效率,一直都是多能源动力系统的关键。本论文首先通过研究混合动力汽车各部件间的速比关系,得出优化速比可以使得各部件间传递效率得到共同提升的结论,在此基础上计算各驱动模式的传递效率并得到平衡曲线,以此优化串并联模式切换时机,提升了整车的经济性。

Hybrid electric vehicles have multiple energy sources,and the car controller needs to coordinate and choose diff erent energy to drive under diff erent working conditions.Hybrid electric vehicles have both series mode and parallel mode drive,and different drive modes have different energy consumption,so how to improve the energy transfer effi ciency has always been the key to multi-energy power system.Firstly,this paper studies the speed ratio relationship between various components of hybrid electric vehicle,and draws the conclusion that optimizing the speed ratio can improve the transmission effi ciency between various components.On this basis,the transmission effi ciency of each drive mode is calculated and the balance curve is obtained,so as to optimize the timing of series-parallel mode switching and improve the economy of the vehicle.