Patent ID: 7243680

Claim:
An electromagnetic hydraulic valve, comprising a 3/2-way directional control valve, for controlling a variable valve train of an internal combustion engine, comprising: the hydraulic valve ( 1 ) substantially comprises an electromagnet ( 2 ) with an axially movable magnet armature ( 3 ) and a valve part ( 4 ) with at least a first valve seat ( 5 ) and a second valve seat ( 6 ) and a closing ball ( 7 ) corresponding to at least one of the valve seat ( 5 , 6 ), the electromagnet ( 2 ) is formed by a hollow-cylindrical plastic coil former ( 8 ) with an electrical plug contact ( 9 ), at least one coil winding ( 10 ) being accomodated in the coil former ( 8 ) and a magnet housing ( 11 ) which encloses the coil winding ( 10 ), the magnet housing ( 11 ) is formed as a cylindrical tube sleeve, one end face of which is bent into the interior of the sleeve, forming an annular base ( 12 ), and the other end face of which has a number of flange lugs ( 13 ) for connecting it to the coil former ( 8 ), the hollow cylinder of the plastic coil former ( 8 ) is formed at least partly as an armature space ( 14 ) of the magnet armature ( 3 ), into which an upper magnet pole ( 15 ) and a lower magnet pole ( 16 ) protrude and which is lined with a non-magnetic metal sleeve ( 17 ), the valve part ( 4 ) is formed by a hollow cylindrical valve housing ( 18 ), which has a pressure connection (P) at the end and a consumer connection (A) and between the consumer connection (A) and a tank connection (T), respectively formed as a radial opening in its lateral surface ( 19 ), within the hollow cylinder ( 20 ) of the valve housing ( 18 ), one of the valve seats ( 5 , 6 ) of the valve part ( 4 ) is respectively arranged between the pressure connection (P) and the consumer connection (A) and between the consumer connection (A) and the tank connection (T), the valve seats ( 5 , 6 ) of the valve part ( 4 ) are respectively formed as axial apertures in a base ( 21 , 22 ) of two cup-shaped deep-drawn parts ( 23 , 24 ) which are fastened in the hollow cylinder ( 20 ) of the valve housing ( 18 ) over their circumferential surfaces with a press fit, the hydraulic valve ( 1 ) insertable into a complementary valve receptacle by the valve part ( 4 ), which has at least one outer sealing ring ( 25 ), and said hydraulic valve ( 1 ) has a fastening flange ( 26 ), by means of which it can be screwed on the valve receptacle in a manner sealing the pressure medium, wherein at least the magnet housing ( 11 ) and the lower magnet pole ( 16 ) of the electromagnet ( 2 ) and/or the valve housing ( 18 ) and the fastening flange ( 26 ) of the hydraulic valve ( 1 ) are respectively formed as one-part integral components and as individual parts produced without machining.