Improvement of Fuel Economy Using Fuzzy Logic-Based Power Distribution Control Strategy for a FCHEV

This paper presents a new type of fuzzy logic-based power control strategy for a fuel cell hybrid electric vehicle to improve fuel economy while maintaining the battery SOC. The fuel cell system is environmentally-friendly but it has inherent limitation such as slow response time and low fuel efficiency especially at the low power region. To resolve this problem, the battery system has been additionally used and the required fuel cell power is procured using fuzzy rule base by referring the vehicle driving status and the battery status. The validity and the effectiveness of the proposed control strategy are verified via simulation results for three types of standard drive cycles