Abstract: In view of the energy assignment of multipower sources and the randomness and uncertainty of real vehicle driving conditions in an extendedrange electric vehicle, an optimal curve fuzzy control strategy is put forward. The strategy includes two fuzzy subcontrollers to perform the fuzzy adjustment of engine operation region and the fuzzy assignment of series power, for deciding the working interval on the optimal curve of engine and the output power assignment between engine/generator and traction battery respectively in series powertrain configuration. The results of offline HIL simulation indicate that the control strategy adopted has a high generality and good robustness and can achieve the preset control objectives with a better fuel economy.

Key words: extended-range electric vehicle, dual fuzzy controller, fuel economy, hardware-in-the-loop, simulation experiment, extendedrange electric vehicle, dual fuzzy controllers, fuel economy, hardwareintheloop simulation