Research On Multi-power-source Control Strategies And Hardware-in-the-Loop Simulation Testplatform Of Hybrid Electric Vehicles

Facing the challenges of oil shortage and air pollution, Hybrid Electric Vehiche(HEV) becomes one of the main clean vehicles and is on the list of National Electric Vehicle Key Projects of the Tenth-Five Plan and 863 hi-tech Program. In the dissertation, with HEV driveline and hybrid transit bus EQ6110-HEV as the main research subjects, the HEV driveline , control system, power control strategies, modeling, simulation and testplatform were studied and analyzed.Based on the basic structure model of vehicle driveline, the power train system in HEV is divided into three types: serial, parallel and combined type. The driving characteristic and performance of each type were analyzed.The working conditions and performance requirements of the most important modules including APU, motor and battery for HEV were analyzed. The control system of EQ6110 HEV based on CAN bus was designed. Also the application of CAN bus in the control system of HEV was analyzed and the overall setup of the software and the hardware were presented in detail.Through analysis of the energy flow of multi-power-source system, four driving modes and three braking modes for EQ6110 HEV were determined. In order to compromise the dynamics, fuel economy, safety and reliability for HEV, multi-power-source control strategy was designed. Also the control arithmetic was put forward.The evaluation of driving characteristic for HEV was built. Based on the model of power train system, control strategies for EQ6110 HEV was analyzed with matlab/simulink software in order to validate the correctness and practicability of control strategies. The hardware-in-the-Loop simulation testplatform was designed and its technical specification and characteristic were introduced. Experimental results showed that the designed system and control strategy were rational and reliable.