Method and apparatus for driving at least one capacitive control element

US6441535B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Hellmut Freudenberg · Bad Abbach, DE
• Hartmut Gerken · Nittendorf, DE
• Martin Hecker · Laimerstadt, DE
• Christian Hoffmann · Leonberg, DE
• Richard Pirkl · Regensburg, DE
• Gunther Riedel · Kelkheim, DE

Key dates

• Filing date: Jan 16, 2001
• Grant date: Aug 27, 2002
• Expiry date: Jan 16, 2021

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02N2/067
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A control element, in particular a piezoelectrically operated fuel injection valve in an internal combustion engine, is charged, in order to compensate for stochastic reactions in the internal combustion engine, with a constant nominal voltage applied to a series circuit that includes a charge capacitor and a charge reversal capacitor, and it is discharged into the charge reversal capacitor to a prescribed voltage value. The remaining residual charge of the control element is charged into the charge capacitor via a limiter path.