四驱混联电动汽车的燃油经济性优化

从等效燃油量出发,建立了四驱混联电动汽车在充/放电模式下的等效模型。控制发动机工作在最经济区域,以等效燃油消耗率为优化目标函数,寻求出整车燃油消耗量最低的理想操作线。通过仿真和台架试验得到燃油经济性优化结果,结果表明理想操作线决定了发动机和各个电机的最佳控制值,可使车辆系统的效率最高,油耗最低。

A Study on Fuel Economy Optimization for 4WD Hybrid Electric Vehicles

In this paper an equivalent model for 4WD hybrid electric vehicles under charge and discharge modes of battery is set up with a concept of equivalent fuel consumption.For the conditions that the engine is operated within the region of the best fuel economy,and taking the equivalent specific fuel consumption as target function,an optimization is conducted to get the desired operation curve,along which the minimum fuel consumption is achieved.A corresponding bench test is also carried out.The results show that the optimal control variables of engine and electric motors are determined by the desired operation curve,so ensuring the best efficiency and minimum fuel consumption of the vehicle.