前后轴独立驱动的增程式电动汽车整车控制策略

Vehicle Control Strategy for a Rear Axle Independent Drive Extended Range Electric Vehicle

纯电动汽车因续驶里程短和充电速度慢等原因制约了其进一步发展,增程式电动汽车在保证较低燃油消耗率的前提下弥补了纯电动汽车的缺陷。本文以前后轴独立驱动的增程式电动汽车为例,以保证整车的动力性能和降低燃油消耗率为出发点,提出了前后轴独立驱动增程式电动汽车的整车逻辑门限控制策略,该策略控制发动机的工作点随整车需求功率的变化而工作在不同的最优燃油消耗点上。仿真分析可知发动机在不同工况下均可以工作在低燃油消耗点附近,这表明该控制策略可实现对整车燃油经济性的良好控制。

Pure electric vehicles have restricted their further development due to short driving range and slow charging speed.The extended-range electric vehicle can not only reduce the fuel consumption rate,but also make up for the shortcomings of the short driving range and slow charging of the pure electric vehicle.In order to improve vehicle dynamic performance and reduce fuel consumption,this paper designs logic threshold control strategy for vehicle based on an Extended Range Electric Vehicle which is driven by independent front and rear axles.This strategy controls the engine operating point to work at different optimal fuel consumption points with the change of the vehicle power demand.According to the result of simulation analysis,the engine can work with a relatively low fuel consumption point under different working conditions.In this way,we can achieve a good control of fuel economy.