Abstract: In a hydraulic brake circuit for a motor vehicle equipped with a wheel anti-lock device and with a wheel anti-slip device, a solenoid anti-slip valve (48) is located in a conduit (26) connecting the master cylinder (12) to the wheel brakes (10), upstream of a solenoid relief valve (34) controlled by the computer of the anti-lock device. When a risk of slipping of the wheels is detected, the solenoid anti-slip valve (48) is energized and a pump (40) associated with the anti-lock device is actuated. In the absence of any actuation of the brake pedal (14), the brakes (10) are thus actuated automatically by way of the pump (40) which sucks up the brake fluid contained in the tank (28) of the master cylinder (12) via the solenoid anti-slip valve (48).

Abstract: The invention relates to a pilot-controlled valve, especially for an anti-skid brake system, this system comprising at least one pressurized-fluid source (90, 115) and at least one pressure receiver, the valve comprising at least one pressurized-fluid inlet (86, 132) and comprising a piston mechanism (54, 114), sliding sealingly in a bore (52) and movable between a rest position and an active position under the effect of an actuating mechanism (17, 18), in order to control an isolating shutter (58, 66) between at least one of the pressurized-fluid sources (90, 115) and at least of the pressure receivers, and a discharge shutter (28) between at least one of the pressure receivers and a reservoir (15), the anti-skid brake system comprising a backfeed circuit including a flow restrictor between at least one of the pressurized-fluid sources (90, 115) and at least one of the pressure receivers.