Torque Distribution Based on Efficiency Optimization of Four wheel Independent Drive Electric Vehicle

Abstract:

The effect of torque distribution control algorithm on the vehicle economy of a four wheel drive electric vehicle was investigated. Mathematic models of key components were established based on theory and test data, and a simulation model of vehicle energy consumption was set up with MATLAB/Simulink software. To reduce the system energy consumption, a torque distribution control algorithm based on the system efficiency optimization was proposed. A torque distribution coefficient map was obtained, which avoided the timeliness problem of on line computation. Compared with the energy consumption of fixed coefficient algorithm, simulation results illustrate that the overall energy consumptions of optimal torque distribution decrease approximately by 5% in different driving cycles.

Key words:four wheel independent drive; torque distribution; energy consumption; efficiency