Efficiency optimized hybrid operation strategy

Details Efficiency optimized hybrid operation strategy Efficiency optimized hybrid operation strategy

2006-11-03

2010-11-09

Nguyen, Cuong H (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Electric vehicle

C307S046000, C307S064000, C320S101000, C320S104000, C903S903000, C903S905000, C180S065280

Reexamination Certificate

active

07831343

ABSTRACT:
A propulsion system for a fuel cell hybrid vehicle that includes a fuel cell system and an EESS, where the propulsion system employs an algorithm for increasing system efficiency. A power limit value is defined as the maximum system efficiency times the charge/discharge efficiency of the EESS. If the vehicle operator requests a power greater than the power limit value, then the fuel cell system will preferably provide the power, and if the power request from the vehicle operator is less than the power limit value, then the EESS will preferably provide the power. The algorithm also considers changing operation conditions and parameters that impact the fuel cell system efficiency and the electric energy storage system efficiency, such as the state of charge of the EESS and regenerative braking.

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