During braking, energy regeneration for hybrid electric vehicles (HEV) is an important technique to improve their fuel economy and extend their driving range. Due to the effect of regenerative braking torque added by the electric motor, the control logic of the braking system should be adjusted. This paper presents a control strategy for an HEV braking system, which calculates the optimal target wheel slip ratio based on vehicle dynamic states; a fuzzy logic approach is applied to maintain the optimal target slip ratio so that the best compromise between hydraulic braking torque and regenerative braking torque can be obtained for the vehicle. This control strategy is implemented with an 8-DOF nonlinear vehicle model and a “Magic Formula” tire model; the simulation results show that the proposed strategy is robust and effective.
Advanced Braking Control System for Hybrid Electric Vehicle Using Fuzzy Control Logic
Sae Technical Papers
SAE 2006 Commercial Vehicle Engineering Congress & Exhibition ; 2006
2006-10-31
Conference paper
English
Advanced braking control system for hybrid electric vehicle using fuzzy control logic
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