Torque Distribution Strategy of Four-Wheel Independent Drive Electric Vehicle Based on Optimal Energy Consumption

Wheels of four-wheel independent drive electric vehicle (4WID EV) can be controlled independently, therefore, the torque distribution strategy becomes more complex. In this paper, a torque distribution strategy based on the optimal energy consumption is proposed. Under the given total torque command, the torque needed to be distributed by the current four wheels will be calculated by the extremum optimization algorithm, so that the four wheels can work in the high efficiency as much as possible, and the 4WID EV energy consumption becomes lowest. The simulation results showed that the torque distribution strategy proposed in this paper could significantly reduce energy consumption. Compared with torque average distribution strategy, the conventional method, this distribution strategy can save maximum energy 26.04% when the vehicle speed is between 20-100km/h.