Patent ID: 6486587
Filing Date: 2002-11-26
Classification: F02D,H02N

Abstract:
A device for controlling an injection valve, which can be activated by means of a piezo-actuator, in particular for a spark ignition engine with internal air/fuel mixture formation, havingcharging and discharging means for the controlled charging and discharging of said piezo-actuator to a desired charging and, respectively, discharging piezo-voltage, said charging and discharging means including a voltage supply with a time-controlled switching means providing an initial charging voltage level and an initial discharging voltage level, said initial charging voltage level being higher than the desired charging piezo-voltage and the initial discharging voltage level being lower than the desired discharging piezo-voltage level, and time-controlled switching means for a rapid time-controlled establishment of the desired piezo-voltage in the piezo-actuator.