| 摘要 |
A process for setting into oscillation an electromagnetic actuator, which actuates a switching element, in particular an internal combustion engine lift valve, and in which process an armature, which acts on the switching element, is oscillated between two electromagnet coils against the force of at least one reset spring by an alternating flow around the electromagnet coils so that the switching element with the armature and the reset springs represents an oscillatory spring-mass system, and wherein, starting from the quiescent state of the system, where the armature is held by the reset springs essentially in the center between these magnet coils, the electromagnet coils are excited alternatingly by driving with an electric alternating voltage of a specific frequency to set into oscillation this spring-mass system in the form of a constantly sinusoidal voltage curve or in the form of a correspondingly variable pulse width-modulated voltage curve.
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