METHOD FOR DETERMINING POSITION OF MOVABLE SHUTTING-OFF ELEMENT OF INJECTION VALVE

摘要

PROBLEM TO BE SOLVED: To provide a method for determining a position of a movable shutting-off element of an injection valve. SOLUTION: This method is provided to determine a position of the movable shutting-off element of the injection valve of an automobile engine, in particular, a needle valve. The shutting-off element is driven by a piezoelectric element to open and close the injection valve. A voltage signal allotted to voltage detected by the piezoelectric element is determined and is used to determine a position of the shutting-off element. Change of voltage put into a model is determined by a model and is used to determine a position of the shutting-off element in the same way. In particular, a position of the shutting-off element is determined using difference between the change of voltage put into the model and a determined voltage signal. COPYRIGHT: (C)2006,JPO&NCIPI