Anti-locking control system

Claim 1

Antilocking control system of the type comprising wheel speed sensors and brake pressure control devices assigned to the vehicle wheels, and an evaluation circuit which receives wheel speed signals from said sensors and produces control signals for controlling said brake pressure control devices in successive control cycles each having a duration and comprising a pressure reduction phase, a pressure maintenance phase, and a pressure build-up phase, said evaluation circuit comprising means for determining the duration of two successive control cycles which are followed by a subsequent control cycle, means for comparing the durations of said successive control cycles, means for preventing a pressure reduction phase in the subsequent cycle and initiating a pressure maintenance phase in the subsequent cycle when the durations of the two successive control cycles differ by less than a first predetermined time.