Skid Control of Small Electric Vehicles with In-Wheel Motors (Effect of ABS and Regenerative Brake Timing Control on Emergency Braking)

Abstract

This paper presents an active safety device for skid control of small electric vehicles with in-wheel motors. Due to the space limitation on the driving tire, a mechanical brake system was installed rather than hydraulic brake system. For the same reason, anti-lock brake system (ABS) that is a basic skid control method cannot be installed on the driving tire. During braking on icy road or emergency braking, the tire will be locked and the vehicle is skidding. To prevent tire lock-up and vehicle from skidding, we proposed the combination of ABS and regenerative brake timing control. The hydraulic unit of ABS is installed on the non-driving tire while the in-wheel motors on the driving tire will be an actuator of ABS to control the regenerative braking force. The performance of the ABS and regenerative brake timing control on the emergency braking situation is measured by the simulation. The simulation result shows that the combination of ABS and regenerative brake timing control can prevent tire lock-up and vehicle from skidding.

Multi‐objective optimisation of electro–hydraulic braking system based on MOEA/D algorithm

“…Nowadays, the researches on the electro–hydraulic composite braking system mainly involve the system dynamic modelling, control strategy developing of the braking force from different angles, control strategy optimisation by considering various constraints, and real‐time control of the regenerative braking with various control methods and so on [8, 9]. Kim and Kim [10] investigated the vehicle stability control by the combination of the regenerative braking and electro–hydraulic brake (EHB).…”