ELECTROMAGNETICALLY OPERATED VALVE, ESPECIALLY FOR CONTROLLED-SLIP HYDRAULIC BRAKE SYSTEMS IN MOTOR VEHICLES

摘要

PCT No. PCT/DE95/00437 Sec. 371 Date Jan. 27, 1997 Sec. 102(e) Date Jan. 27, 1997 PCT Filed Mar. 30, 1995 PCT Pub. No. WO95/28305 PCT Pub. Date Oct. 26, 1995An electromagnetically operated valve which attains an automatic establishment of a reduced flow cross section that is effective after a closing position of the valve. The valve has a magnet armature, longitudinally movable in a valve dome, with a valve tappet for actuation of a seat valve. The seat valve is located in a valve chamber from which pressure fluid conduits, leads to upper and lower face ends of the circumferentially sealed off magnet armature. When the valve is opening from the closing position, an additional force acting in the closing direction upon the magnet armature is generated because of the shaping of the seat valve, and as a result of this additional force the seat valve assumes a partly closed position that is different from its position of repose. The valve is applicable particularly to traction-controlled hydraulic brake systems of motor vehicles.