【摘要】 为了简化混合动力系统复杂的模式控制以及模式切换问题,提出了一种基于分层决策思想的模式划分、能量管理和力矩分配策略。主控制器根据驾驶操作和车辆状态,依次进行驾驶模式决策、能量管理决策和力矩分配控制,控制结构清晰,易于实现。为了评估该控制策略及关键参数的优化,针对正在开发的XL2000轻度混合动力轿车,以AVL CRUISE和MATLAB/SIMULINK为平台,建立了用于控制策略研究和性能分析的仿真模型。通过不同驾驶循环工况下的仿真,表明该策略在实现电池的荷电状态(SOC)平衡控制的前提下,可改善整车当量油耗15.8%~28.5%。台架试验也表明了该控制策略的有效性。更多还原

【Abstract】 In order to simplify the complicated control mode management and transition control among control modes for a mild hybrid electrical vehicle,a control mode based on a layered structure and energy management and torque distribution strategy for a mild HEV’s powertrain system was proposed.Driving mode identification,energy management mode identification and torque distribution strategy were performed sequentially by a powertrain controller.To evaluate the control strategy Could optimize its key control parameters,a simulation model based on AVL CRUISE and MATLAB/SIMULINK was established.The simulation results under different driving cycles indicated that the control strategy can effectively increase equivalent fuel consumption of 15.8%～28.5% for the mild HEV with the battery’s State of Charge(SOC)balance control. Moreover,bench test verified the advantage of control strategy.更多还原