A process for Endlagenansteuerung an operated by an electromagnetic actuator gas exchange valve on a reciprocating internal combustion engine

The invention relates to a method for controlling an electromagnetic actuator for actuating a gas exchange valve in an internal combustion piston engine, comprising two electromagnets spaced from one another, between which an armature acting upon the gas exchange valve is guided back and forth by the force of at least one return spring between the pole faces of both electromagnets and performs a predetermined lift defining an open position and a closed position of the gas exchange valve, whereby the electromagnets are alternately impinged upon by a trip voltage and the lift of the armature is detected by means of a sensor array during its movement from one pole face to the other pole face. Depending on the detected actual values of the lift of the armature, the flow of energy in the tripped electromagnets is controlled by the control unit in such a way that the armature moves at a speed tending to zero at a predetermined distance range relative to the pole face of the corresponding tripping electromagnet. At the end of the lift motion, the trip current flow of the tripping electromagnet is guided in such a way that the armature is maintained oscillating at a short distance from the pole face.