Patent · US Expired

Device and method for driving a capacitive actuator

US6137208A · kind A · utility

8Cited by

3References

11Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Christian Hoffmann · Leonberg, DE
Georg Brasseur · Wien, AT
Hellmut Freudenberg · Bad Abbach, DE
Hartmut Gerken · Nittendorf, DE
Richard Pirkl · Regensburg, DE

Key dates

Filing date	Feb 16, 1999
Grant date	Oct 24, 2000
Priority date	—
Expiry date	Feb 16, 2019

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D2041/2003
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.