串联混合动力汽车控制策略

Control Strategy for Series Hybrid-Power Vehicle

为了提高串联混合动力汽车的燃油经济性和排放性,延长动力系统部件的寿命,对串联混合动力汽车控制策略进行了研究。仿真分析了动力系统控制策略对整车性能的影响。结果表明:作者所采用的功率跟随+恒温器的控制策略充分利用了发动机和电池的高效区,既减少了蓄电池的过度循环和大电流放电,又避免了发动机的频繁起停,同时发动机的工作点主要集中在经济性和排放性较好的区域,使动力系统达到整体效率最高。

In order to improve the fuel economy and emission behavior of series hybrid-power vehicle and extend the life-span of the powertrain components, the control strategy for series hybrid-power vehicle was studied by means of simulation. The effects of powertrain system on vehicle performance were analysed. The simulation results show that the developed control strategy of “power follow-up plus thermostat” can make the best use of the high-efficiency areas of both the engine and the battery; the over-charge and high-current over-discharge conditions of the battery become less possible; the frequent starts and stops of the engine are avoided.Because the operating points of the engine are mainly within the areas of better economy and better emissions, the overall efficiency of the powertrain maximizes.