With the crisis of energy and environment, hybrid electric vehicle has become one of the focuses of clearing vehicle in the world. Our research objective-A Optimal Control Strategy and Simulation on Propulsion System of the Series Hybrid Electric Vehicle WG6120HB- is also one of our national industrialization base's research tasks. On this ground , our work in this research has practical value,,In the first chapter, we discuss the inevitably emergency of HEV as well as problems their confronted. Then we give several ways to deal with these problems. In the following chapter, we mainly introduce three kinds of HEV propulsion system: Serial hybrid electric vehicle (HEV), Parallel hybrid electric vehicle (PHEV), combined hybrid electric vehicle (CHEV). This section clearly compares structure and propulsion model of this three different types HEV. Through these methods, we can achieve a systematical understanding of various HEV characteristic.We comprehensively analyze control strategies such as Drive Distance Increase type and Engine Power Trace type used in SHEV in chapter three. In order to give a comparatively comprehension, we also introduce two different control strategies which are applied in PHEV. Finally, we can decide which control strategies to be choose and then deeply understand those control strategies we used in WG6120HB.The last chapter is the most important part. Based on what has been discussed, we draw a conclusion that Engine Power Trace control strategy is adopted in WG6120HB. Then we bring forward our optimal control strategy and give simulation on the ADVISOR platform. The simulation ending appear that our minimize fuel consume objective which were constraint by several factors is achieved. And we also compare our control strategy with several control strategy recommended by ADVISOR software, but the simulation outcome proved that our controller had better performance. In the end, we point out some shortcoming of our controller as the next direction of our research.
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