Abstract: A magnet system for magnet valves for controlling liquids including an electromagnet and a permanent magnet that produces magnetic fluxes, the magnetic fluxes of which are oriented opposite one another in a working air gap formed between a free-floating armature and a magnet pole. To attain a course of the force of attraction acting upon the armature that becomes negative beyond a certain excitation of the electromagnet, and to reduce the trigger power for the electromagnet, a magnetic opposite pole is disposed on the side of the armature remote from the working air gap, forming a second working air gap, which is coupled to the magnet housing, optionally via a stray air gap, via a flow guide element annularly engaging the permanent magnet.

Abstract: An electromagnetically actuatable valve is proposed that serves in particular as a fuel injection valve for fuel injection systems of internal combustion engines. An armature cooperates with magnet poles, and a bearing cone the length of the generatrix of which is approximately equivalent to the diameter is machined into a valve seat body. The armature and valve seat body may also have bearing faces of calotte shape facing one another.

Abstract: An electromagnetically actuatable valve that serves in particular in inject fuel into the intake tube of internal combustion engines operating with fuel injection systems. The fuel injection valve includes a valve housing core with a surrounding magnetic coil and a guide diaphgram secured across the valve housing, the guide diaphragm urges an armature/valve closing element, embodied in one piece in the form of a spherical section, toward a valve seat. The guide diaphragm loosely engages a flat bearing face of the armature, so that the valve closing element can automatically center itself with respect to the valve seat. Upon a reciprocating movement of the armature/valve closing element, the frictional force between the guide diaphragm and the bearing face prevents a radial movement of the armature/valve closing element.