Journal of Applied Sciences

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Optimization of Hybrid Electric Vehicle Power System Using Fuzzy Logic Control

ZHOU Chun-guo, LIU Hong-zhao, LI Xin, CUI Ya-hui   

  1. School of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an 710048, China
  • Received:2006-11-09 Revised:2007-05-29 Online:2007-09-30 Published:2007-09-30

Abstract: We study multi-target optimization of the power system of hybrid electric vehicles aimed at fuel saving and emission minimization. A fuzzy logic control strategy is used to realize different control targets. The structure chart and inference rule of the fuzzy logic control system is established, with emphasis on the discussion of the fuzzy control method and process. Two operation modes are simulated with the software, under ordinary electric control and fuzzy logic control, respectively. Curves of SOC change are obtained. Comparison between the control effects indicates that the fuzzy logic control strategy is suitable for the control of hybrid electric vehicles.

Key words: hybrid electric vehicle, optimization, fuzzy logic control