A method and determination of the control voltage for a einspritzentil with a piezoelectric actuator

摘要

According to the invention, a method for determining the control voltage for a piezoelectric actuator of an injection valve is proposed in which, before the next injection operation, first, indirectly, the pressure in a hydraulic coupler (4) is measured. The pressure is measured by the piezoelectric actuator (2) is mechanically coupled with the hydraulic coupler (4) is coupled, so that the pressure of a corresponding piezo - voltage induced in the actuator (2). This induced voltage, before the next injection operation for the correction of the control voltage, inter alia, for the actuator (2) is used. Too low an induced voltage, the error for the detection of an injection evaluated by observing the. Dollars a the injection valve (1) is preferably for a common - rail - a system for a fuel injection for a gasoline - or diesel engine is used (fig. 1).