Study On Powertrain Control System Of Hybrid Electric Vehicles

Under two greatest pressures of the energy crisis and the environmental protection, the hybrid electric vehicles (HEV) are obtaining developed vigorously in the world scope. Compared with the traditional automobile, the HEV's engine works frequently under the best conditions, reduced the exhaust gas and improved efficiency availably. The Energy-Recycled System can improve the energy efficiency of the vehicles. The HEV can discharge in certain specific region realization zero when it uses the mode of the pure electrically operated pattern. Linked the study of HEV Powertrain and Control System, this thesis introduces the developments as follows:1. It is analyzed of the essential technology of the powertrain of th HEV, discussed the basic structure type of the HEV , and compared and analyzed the respective charaters in the thesis, which . provided the theory basis to choose the vehicle type and the strategy2. It is chosen the minicar as the base model to study the HEV with the features of the development of Guangxi automobile industry,and It is designed the powertrain of the HEV. It is determined the structural style of the HEV and the combination form of the hybrid powertrain according to the analytical result..3. It is simulated and calculated the main power assembly parameters and the energy match of the Hev's powertrain, analyzed the vehicle each performance, designed the powertrain based on the parallel electric assistant control strategy, and validated the rationality of the parameter.4. Aimed at the parallel HEV, It is planed the overall construction of the powertrain control system, designed the suitable control strategy based on the parallel electric assistant control strategy .confirmed the process of the system ,and provide the top layout and direction of the system developed in the future.