Device and method for driving a capacitive actuator

Christian Hoffmann (Inventor), Georg Brasseur (Inventor), Hellmut Freudenberg (Inventor), Hartmut Gerken (Inventor), Richard Pirkl (Inventor)

Research output: Patent


A device and a method for driving at least one capacitive actuator, in particular a piezoelectrically operated fuel injection valve of an internal combustion engine, by a microprocessor-controlled control circuit. The device has a charging capacitor which can be recharged by an energy source, which charges the at least one actuator via switches controlled by the control circuit, and into which the actuator is discharged again.

Original languageEnglish
Patent numberUS6137208
IPCH02N 2/ 06 A I
Priority date5/08/97
Publication statusPublished - 24 Oct 2000


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