Riding Comfort of an Electric Vehicle Based on the Coupling Affection of Mechanical Friction and Electric Regenerative Brake

Abstract

In order to satisfy the braking comfort of electric vehicles, the braking performance and braking force distribution schemes are studied for the coupling braking system of mechanical friction and electric regenerative braking of electric vehicles. First, the performance of the coupling brake system was analyzed. Then the problem of braking force distribution is studied, and the logical distribution of braking force based on comfortness is proposed. The influence of braking strength and braking speed on the braking comfort of electric vehicles is fully considered. So the braking force is distributed between the two braking systems and between the front and rear axles to meet the comfort. The consistency of the two braking systems is achieved through multidisciplinary modeling, comprehensive simulation and system optimization design. And the electric vehicle model was established on the MATLAB, AMESim and ADAMS co-simulation platform, then the braking comfort and safety of the electric vehicles were simulated. The simulation results were in compliance with the ECE regulations. Finally, the braking efficiency of the series and parallel braking distribution strategies under gravel pavement is compared. The results show that the braking efficiency of the series braking distribution strategy is better. Through theoretical simulation and experimental tests, it is found that the braking force distribution strategy is feasible and effective. Electro-hydraulic brake system has good performance, paving the way for the industrialization of electric vehicles.