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Hybrid electric vehicle research and development to solve the environmental pollution and energy crisis can play a considerable role, while China's current hybrid electric vehicle research is still in its infancy, for which the Ministry of Science and Technology in hybrid electric vehicles as 863 plan a big project. Hybrid electric vehicles (Hybrid Electric Vehicle HEV) is a set of mechanical, electrical, chemical and thermodynamic system in one of the complex highly non-linear dynamic systems, vehicle fuel economy, taking into account the cost of the vehicle HEV control policy direction. The main object of study of parallel hybrid electric vehicles (Parallel Hybrid Electric Vehicle, PHEV), fuzzy logic control (Fuzzy Logic Control, FLC) as the main research method, the energy distribution of the fuzzy logic controller through the establishment of a PHEV power system, and use ADVISOR2002 and Matlab / Simulink simulation software created by car model simulation. This paper analyzes the structure and type of hybrid electric vehicles, hybrid drive, and made a summary of the characteristics and conditions of the various drive types. Then expounded parallel hybrid electric vehicles of thought control and control strategies, different control strategies were compared to determine the control strategy based on fuzzy logic control, and then a brief introduction to the basics of fuzzy theory. One for the PHEV improved fuzzy control strategy, it is actually a multi-structure of the fuzzy controller, the vehicle at the start, acceleration, deceleration, cruise control rule set idle different modes of operation, in order to to adapt to the type of energy demand in the respective modes of the car. To simulation by improved fuzzy controller embedded Advisor, such improved fuzzy controller simulation results and the fuzzy controller simulation results contrast can be seen that the effect of the improved fuzzy control is superior overall general fuzzy control, fuzzy logic control improved, hybrid electric vehicle exhaust emissions and fuel consumption in CYC_ECE_EUDC driving cycle were reduced by 12.2% and 6.5%, decreased by 1.8% and 4.6% in the CYC_UDDS driving cycle . Improved FLC, the operating point of the engine compared to the more dense, smaller fluctuation when it is running, this can reduce vehicle exhaust emissions and energy saving.
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