Study And Simulation On Energy Control Strategy Of Yema Hybrid Electric Vehicle

The Automobile industry will be confronted with tremendous challenges in the 21^st Century due to environmental issues and declining petroleum resources. A Hybrid Electric Vehicle (HEV), combining a conventional powertrain system with electric vehicle powertrain system, can also satisfy the requirements of energy efficiency and low emissions without sacrificing the conventional vehicle's merits of long driving range and high drivability. Thus, for the short-to-mid-term HEV has the most potential as an alternative to conventional vehicle. In order to reach the overall design objectives of a HEV, regardless of topology of the vehicle, the research on the energy control strategy is one of the most significant parts of HEV design, and it is also the foundation of building HEV prototype.In this paper, the present development status of HEV is introduced firstly. After analyzing and comparing the three general HEV's configuration (Series Hybrid Electric Vehicle, SHEV; Parallel Hybrid Electric Vehicle, PHEV; and Series-Parallel Hybrid Electric Vehicle, PSHEV), according to the whole vehicle's design requirements and actual condition, four schemes of Yema HEV's configuration have been fixed on. This paper places emphasis on one PHEV scheme of them. Under this configuration, the main power components have been chosen. Furthermore, the studies on these components have been conducted. Since the mathematical models of the engine is the most essential theory foundation for Yema PHEV's control strategy design, the detailed study on the engine, therefore, has been done separately, and the accurate models of the engine has been set up by using formula-draft method.