Electromagetically actuated valve for slip-controlled hydraulic brake systems in motor vehicles

An electromagnetically actuated valve (10), for slip-controlled hydraulic brake systems in motor vehicles, which comprises:

• a magnet armature (21) is accommodated in longitudinally movable fashion in a closed valve dome (14), the valve dome (14) is surrounded by a solenoid (17), emanating from the magnet armature (21) is a valve tappet (22) with a closing member (24) arranged at an end remote from the armature, a valve body (27) with a valve seat (29) as a pressure-medium inlet is secured in a housing (11) of the valve (10), with the solenoid (17) unexcited, a return spring (31) raises the closing member (24) from the valve seat (29) due to the action of said return spring (31), the closing member (24) and the valve seat (29) part of the valve body (27) forms a first seat valve (30) and are situated in a valve chamber (35) which is connected to a pressure-medium outlet of the valve (10), the valve chamber (35) has a valve subchamber (43) which acts as a retaining space and from there emanates a first pressure-medium passage (45) that leads to a control chamber (47) situated between a valve dome end (47) of the magnet armature (21) which is remote from the closing member and the valve dome (14), a second pressure-medium passage (48) leads from the valve chamber (35) to a balance chamber (49) which is arranged between an end (50) of the magnet armature (21) which is close to the closing member and a pole core (13) of the valve (10), a pressure generated in the valve subchamber (43) is capable of bringing about a force in the control chamber (46) that acts counter to the force of the return spring (31) on the magnet armature (21) and as a result due to the force, the seat valve (30) assumes a partially closed position which differs from its rest position, a pressure-medium-transmitting connection along the circumference of the magnet armature (21) is provided between the control chamber (46) and the balance chamber (49), the pressure-medium-transmitting connection is controlled by a second seat valve (51), in a rest position and during a first partial stroke of the magnet armature (21) following this rest position, the pressure-medium transmitting connection is open, in the working position and during a second partial stroke of the magnet armature (21) following the working position, the pressure-medium-transmitting connection is closed by the second seat valve (51).