Study of combined energy supervisory control strategy on axis-split four wheel drive hybrid electric vehicle

This paper presents an axis-split four wheel drive (4WD) hybrid electric vehicle (HEV) contains three power components, a multiple control strategy which combines the rule based modes and instantaneous optimization is developed in order to meet the complex control requirements. Firstly, the operation characteristic and torque split requirement of specific mode are presented; then, instantaneous torque split has been implemented with optimization theory in the most complicated modes. Based on the strategy, a simulation plant is developed. Simulation results splendidly verify the feasibility and control effects of this strategy.