Patent ID: 7021256

Claim:
An electromagnetic hydraulic control valve for controlling a variable valve drive of an internal combustion engine, the valve comprising: an electromagnet having a coil winding arranged on a spool, and a magnet housing enclosing the coil winding, a hydraulic part including a valve stem with a pressure connection, a tank connection and a consumer connection, the spool of the electromagnet and the valve stem of the hydraulic part are a one-piece body with an axial longitudinal bore having a length and having different diameters along the length, the longitudinal bore defining an armature space; an axially movable magnet armature in the bore, a closing body connected to the magnet armature, and the bore defining a control region for the closing body and the magnet armature, the magnet housing including an annular collar which projects into the armature space of the longitudinal bore of the body, and the collar defines a top magnet pole of the electromagnet, a bottom magnet pole of the electromagnet also projecting into the armature space of the longitudinal bore of the body, the bottom magnet pole is connected to the magnet housing in a magnetically conductive manner; the bottom magnet pole comprises an annular disk integrally in the body, the annular disk having a plurality of free sections with an outer circumference of the annular disk; a plurality of radial webs arranged at the outer circumference of the annular disk for fastening the magnet housing to the hydraulic valve and for fastening the hydraulic valve to an engine block of the internal combustion engine.