Anti-skid control system for motor vehicles

Claim 1

An anti-skid control system for a motor vehicle, having a plurality of wheels and in which wheel velocity of the wheels is decreased by increasing brake pressure and is increased by reducing the brake pressure, and in which the reduction of the brake pressure is to be stopped at a point where a level of the wheel velocity is reached which is higher than a low peak of the wheel velocity by a predetermined percentage of difference between the wheel velocity at time when reduction of the brake pressure is started, and the low peak of the wheel velocity, comprising: means for providing a computed vehicle velocity on the basis of the highest one of the wheel velocities of the motor vehicle; means for providing a first reference velocity and a second reference velocity, each of said reference velocities being lower than said computed vehicle velocity, said first and second reference velocities respectively having a first and a second velocity different, or a first and a second velocity ratio, with respect to said computed vehicle velocity; said first reference velocity being higher than said second reference velocity; and means for continuing reducing the brake pressure beyond said point until the wheel velocity recovers up to said first reference velocity, if the time period from when the wheel velocity reaches said second reference velocity to said point where said level of the wheel velocity is reached, is longer than a predetermined time period.