Abstract
This research proposes a regenerative braking co-operative control system for the automatic transmission (AT)-based hybrid electric vehicle (HEV). The brake system of the subject HEV consists of the regenerative braking and the electronic wedge brake (EWB) friction braking for the front wheel, and the hydraulic friction braking for the rear wheel. A regenerative braking co-operative control algorithm is suggested for the regenerative braking and friction braking, which distributes the braking torque according to the driver’s demand. A vehicle test was performed to evaluate the proposed braking system and cooperative control algorithm.
Highlights
In hybrid electric vehicle’s (HEV) braking, the regenerative braking can not be used only by itself due to the following reasons: 1) the regenerative braking force is not large enough to cover the driver’s demanded braking force, 2) battery state of charge (SOC) limitation, 3) vehicle speed, etc [1][2]
This study proposes a co-operative control system of the regenerative braking for an automatic transmission (AT)-based HEV using the electronic wedge brake (EWB) on the front wheel, and the hydraulic brake on the rear wheel
The regenerative braking on the front wheel and the friction braking on the rear wheel are performed in the section S according to the co-operative control algorithm
Summary
In hybrid electric vehicle’s (HEV) braking, the regenerative braking can not be used only by itself due to the following reasons: 1) the regenerative braking force is not large enough to cover the driver’s demanded braking force, 2) battery state of charge (SOC) limitation, 3) vehicle (motor) speed, etc [1][2]. Friction braking should be needed together with the regenerative braking and a control algorithm is required to ensure active co-operative control between the regenerative braking and friction braking[3][4]. This study proposes a co-operative control system of the regenerative braking for an automatic transmission (AT)-based HEV using the electronic wedge brake (EWB) on the front wheel, and the hydraulic brake on the rear wheel. A regenerative braking co-operative control algorithm is suggested for the regenerative braking and friction braking. A vehicle test was performed to evaluate the proposed braking system and co-operative control algorithm
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