Patent ID: 7007920
Filing Date: 2006-03-07
Classification: F01L,F02D,F16K,Y02T

Abstract:
1. A method of controlling energaization of an electro-magnetically driven valve having electromagnets and an armature which is attracted to the electromagnets and thereby moving a valve body to either of an opened position or a closed position, comprising: determining a target moving speed of the armature relative to the electromagnets dependent upon a spacing distance of the armature from the electromagnet; controlling at least a part of energization of the electro-magnetically driven valve through a feedforward control so as to make an actual moving speed of the armature relative to the electromagnets in conformity with the target moving speed while controlling at least the other part of the energization through a feedback control based upon a deviation of the actual moving speed from the target moving speed; in which a gain of the feedback control is changed based upon a relation between the actual moving speed and the target moving speed.