并联混合动力电动汽车的模糊能量管理策略

为进一步优化并联的经济性，增强其能量管理策略的鲁棒性，针对高混合率，分析了常用的发动机最优曲线能量管理策略的不足，提出了以功率差、电池组荷电状态和电机转速为输入，以决定电机功率的比例系数为输出的模糊逻辑功率分配策略，在线计算电机所应承担的功率，达到了优化发动机工作点、电机效率和电池组荷电状态平衡的目的。通过整车循环工况前向仿真验证了该模糊策略对车辆经济性和工况适应性的改善。

A Fuzzy Energy Management Strategy for Parallel Hybrid Electric Vehicles

Multi-energy-source Powertrain Energy Management Strategy is one of the key problems in research on hybrid electric vehicles (HEV). To further improve the fuel economy and robustness of energy management strategy of parallel hybrid electric vehicles (PHEV), the shortage of the "Optimal Engine Curve" energy management strategy in common use for PHEV is analyzed. Based on that, a fuzzy logic power split strategy, with the difference between desired vehicle power and "engine optimization power", the state of charge of the batteries and the motor speed as inputs and a scaling factor of motor/generator power as an output, is presented. A set of fuzzy logic rules has been developed to determine the motor/generator power target value coordinating the engine operating points. The engine operating points, motor efficiency and balance of battery SOC are optimized. Results of forward-looking vehicle driving cycle simulation have shown the potential improvement of fuel economy and flexibility to different drive cycles.