Regenerative Braking System At Low Vehicle Speed

To achieve a high regenerative efficiency, a good safety and a notable comfort for the driver, an optimized coordination between the friction braking and the regenerative braking must be realized. One difficult coordination situation is at low vehicle speed. The regenerative braking efficiency can be improved considerably by reducing the speed at which braking engine torque is replaced by friction braking torque. However a highly responsive braking system is necessary.This study presents a new compact Electro-Hydraulic Brake System(EHBS), using a ball-screw electric actuator and a specific architecture to decrease the response time of the pressurization. Simulations of the system had been performed to show braking performances and comfort results for the driver. It shows the benefits and the feasibility of this compact EHBS and the proposition is aligned with the global electrification trend of vehicles.