Patent ID: 6397798
Filing Date: 2002-06-04
Classification: F01L

Abstract:
An electromagnetic valve actuator for acruating a valve, comprising:a valve drive armature, resilient return means arranged for holding the valve at rest in a predetermined position, substantially halfway between two extreme positions one of which is a closed position, electromagnetic means having a ferromagnetic core placed on both sides of the valve drive armature, and a power circuit for applying power in alternate time periods to said electromagnetic means, wherein said power circuit includes: means for measuring an energization current generated by the power circuit in the electromagnetic means, means for calculating a velocity with which the armature approaches each of its extreme position by deriving said velocity from said energization current, and means for applying an energization current to the electromagnetic means in order to servo-control variation of said velocity, as provided by said calculation means for calculating a velocity, to a predetermined reference profile.