Magnet system

A magnet system for magnet valves for controlling liquids, in particular for fuel injection valves, having an electromagnet, which has a magnet core forming a magnet pole, an exciter coil surrounding the magnet core and a magnet housing coaxial with and surrounding the exciter coil, said housing forms a magnetic short circuit and is connected via a short-circuit yoke to a face end of the magnet core remote from a pole face, an annular permanent magnet with an axial direction of magnetization, the permanent magnet being disposed coaxially with the magnet core near its pole face, and having an approximately disk-shaped armature, which is located free-floatingly opposite the magnet pole, forming a working air gap with the pole face thereof, wherein a circulation of the exciter coil and the disposition of the permanent magnet are selected such that the magnetic fluxes of the electromagnet and permanent magnet are in opposite directions to one another in the working air gap, a magnetic opposite pole (29) disposed on a side of the armature (28) remote from the working air gap (31), said magnetic opposite pole (29) forms a second working air gap (32) between its pole face (30) and the armature (28), said magnetic opposite pole is coupled to the magnet housing (25) via a magnetic flux guiding pole plate (35) which is spaced circumferentially from the permanent magnet (21).