BRAKE ANTILOCK CONTROL METHOD FOR VEHICLE

PURPOSE:To make the slipping rate in an adequate scope accurately by detecting the deceleration rate of the wheel rotation after passing a specific time from the starting of the decompression of the brake liquid pressure, setting the extending time of the decompression longer when the detected deceleration rate is larger while shorter when it is smaller, and continuing the decompression until the said extending time is over. CONSTITUTION:After a decompression instruction is issued, a timer 98 is reset, and a decompression is carried out for a fixed decompression time T1, which is a checked time by the timer 98 stored in a fixed decompression time memory 102. After the time T1 passes, the wheel deceleration speed alpha is taken in, from which the decompression extending time T2 is set depending on a map. As the wheel deceleration speed alphais the larger (as the mark of the wheel acceleration speed is negative and the absolute value is the larger), the decompression time is set the larger. And the decompression is carried out until the checked time of the timer 98 exceeds the sum of the fixed decompression time T1 and the decompression extending time T2. Consequently, even though the condition in the braking has various variations, the decompression is carried out for the time responding to the variations, and the slipping amount or the slipping rate is kept in an adequate scope.