| 摘要 |
PURPOSE: A wheel pressure control method of an anti-lock brake system is provided to improve braking force, and to relieve vibration of a brake pedal in operating the anti-lock brake system by keeping frictional force and slip optimally. CONSTITUTION: Wheel speed is calculated according to a signal from a speed sensor(S10) and vehicle speed, deceleration, and acceleration of wheels are estimated from the calculated wheel speed(S11). The slip rate of the wheel is calculated with the vehicle speed and the wheel speed(S12), and the driving state of the wheel is detected by deciding the slip rate to be within the stable range(S13). The slip rate is detected to be within the optimal range of braking force by comparing the slip rate, deceleration and acceleration with the reference values(S14,S15). Hydraulic pressure is kept optimally in the wheel cylinder.
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