混联混合动力客车动力系统建模与转矩分配控制策略研究

Study on Modeling of Power Train for Series-Parallel Hybrid Electric Bus and Torque Distribution Control Strategy

以某型号混联式混合动力公交客车为研究对象,在分析其动力系统的基础上,利用Cruise软件建立了动力系统仿真模型,并结合车辆实际运行特点,设计了一种以燃油经济性和超级电容电量平衡特性为控制目标的转矩分配控制策略,在选定的工况下进行了仿真.仿真结果表明,与实车测试数据相比,设计的控制策略在保证整车动力性的基础上,燃油消耗降低了6.2%,并较好地维持了超级电容的电量平衡,验证了整车仿真模型与转矩分配控制策略的正确性和有效性.

Using a series-parallel hybrid electric bus as the study object and based on the analysis of the power train, the simulation model of power train is established in Cruise. Combined with the characteristics of vehicle operation, a torque distribution control strategy with fuel economy and super capacitor charge balance feature as major control objects is proposed. Then the simulation is completed under the selected cycle condition. The results show that on the basis of guarantee the vehicle dynamic performance, the torque distribution control strategy can reduce the fuel consumption by 6.2% compared with the real vehicle test data. And the charge balance of super capacitor is well maintained. All of these verify the validity and feasibility of the simulation model and torque distribution control strategy.