The Design And Simulation On The Power System Of The Hybrid Electric Vehicle

The energy problem is currently an important aspect of restricting the modern industrial development, and automobile industrial is one of the main sources of the energy consumption, so it is strategically meaning for the studying of automobile energy-saving and reducing automobile energy consumption. At present, all countries carried on a great deal of research and development to the automobile energy saving technique, among which hybrid electric vehicle (HEV) is one of the most industrialization and market types currently. Hybrid Electric Vehicle (HEV) combines the advantages of conventional Engine-driven vehicles and pure Electric Vehicle (EV). So the research of the HEV key technique, such as energy-saving mechanism and the parameter design and optimization etc, is a matter of realistic meaning.Performances of HEV, in terms of driving, fuel consumption, and exhaust emission, strongly depend on the coordination of the drivetrain and their control strategy. In this paper, the classification and associated characteristics of HEV are firstly analyzed and discussed. And then, the configuration and operation modes of electric assist parallel HEV are introduced.A design method of drivertrain for electric assist parallel HEV are presented, in which, both the weight and rate power of the drivetrain components are comprehensively considered.In this thesis, an idea was put forward that the HEV parameter design mainly is to design the degree of hybridization (DOH). And the design method of DOH was discussed in detail: Based on the drive cycle and HEV dynamics restriction, the total power of the motive sources was first determined as the precondition of DOH design.By analyzing components of the drivetrain, a modeling method based on ADVISOR is proposed. The transmission and control system models are then established on the Matlab/Simulink platform and the overall system is simulated and analyzed in Advisor.The study of this paper would be helpful to reduce the period of design for HEVs and supply the reference for drivetrain design, control strategy and vehicle's performance evaluation.