Optimization of energy recovery strategy for pure electric commercial vehicles
In order to improve the driving mileage of electric commercial trucks,the kinetic energy consumed by sliding and braking of electric trucks shall be recovered as much as possible under the condition of ensuring driving safety.Based on the ECE regulations and the ideal braking distribution curve of the front and rear wheels,an energy recovery strategy based on the opening of the brake pedal for the electric commercial truck with rear wheel drive was proposed,without changing the mechanical braking structure of the original vehicle,to optimize the original scheme.Based on the motor experimental data,the braking force was distributed by using the motor torque curve with the best starting electric efficiency fitted by the least square method.By using the brake pedal opening and change rate,the transition rule from the current torque to the target torque was formulated to ensure the smoothness of braking.Finally,the model was built by Simulink software and integrated into the vehicle controller.The results showed that on the premise of ensuring safety,SOC consumption in the specified section was from 100%to 70%,and the driving mileage of this scheme was 6.6%higher than that of the original vehicle scheme.It was verified that the optimization strategy could effectively improve the driving mileage of vehicles.
NETL
NSTL
万方数据
维普
