Electromagnetic hydraulic valve, in particular a 3/2-way directional control valve, for controlling a variable drive train of an internal combustion engine

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.