混联式混合动力系统多能源综合控制策略

Design and validation of hybrid control strategy for parallel-series HEV

为实现混合动力车辆的能源管理与控制,针对混联式混合动力系统设计了基于分层结构的多能源综合控制策略.该策略将混合动力控制逻辑划分为决策层、中间层与伺服层:决策层确定系统总功率需求与控制模式;中间层进行功率分配并确定各部件稳态控制目标;伺服层根据控制品质要求确定动态过程瞬时控制目标.开发多能源综合控制器ECU软硬件,并对硬件在环仿真平台上进行典型工况测试.测试结果表明,设计的混联式混合动力系统多能源综合控制策略实现了混合动力车辆的能量管理与控制,发动机工作点得到优化配置,提高了燃油经济性.控制策略的分层结构设计方法,使控制逻辑更为简明、清晰,同时兼顾了功率流的优化配置与动态过程的品质控制要求.

Based on the hierarchical structure,a hybrid control strategy is designed for PSHEV.The strategy divides the hybrid control logic into decision-making layer,the middle layer and the servo layer.The decision-making layer determines the total request power and the system control mode,the middle layer distributes the power to components and determines the static control objectives,and the servo layer determines the transient control objectives according to the requirement of control quality.The ECU software and hardware of the hybrid control unit is developed and the typical situation tests are carried out by the Hardware-In-the-Loop（HIL） simulation platform.The results indicate that the designed hybrid control strategy for PSHEV can realize the energy management and control well,and the fuel economy is increased by the optimal configuration of engine working state.The hierarchical structure designed method for control strategy makes the control logic much more concise and legible,and gives attention to the optimal configuration of the power and the requirement of control quality in transient process meanwhile.