Abstract
Brake-by-wire system is potentially employed in electric vehicle and autonomous vehicle thanks to the controllability on hydraulic pressure of wheel brakes. In this paper, a newly designed electronic control hydraulic braking (ECHB) system is founded as the brake-by-wire system. With the consideration lying on the regenerative braking and active braking performance, braking forces distribution of ECHB system in front and rear wheel brakes as well as motor regenerative braking force is introduced. Hydraulic braking system and motor drive are working cooperatively as the driver's braking demand is fulfilled in regenerative braking, and hydraulic pressure is allocated properly to avoid the wheel locking to enhance active braking safety. A comprehensive modeling process is developed with hydraulic braking system in AMESim, vehicle dynamics in CarSim, and braking control unit (BCU) and motor drive in MATLAB/Simulink respectively. Two co-simulation scenarios are programed for ECHB system evaluation: typical regenerative braking and active braking conditions. Simulation results are analyzed with depiction and calculation according to the dynamic performance. Effectiveness and feasibility of proposed ECHB system are concluded in view of energy economy and braking safety enhancement.
Published Version
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