Patent · US Expired

Device for controlling a piezoelement injection valve

US6486587B2 · kind B2 · utility

10Cited by

13References

4Claims

0Family size

Assignee

Daimlerchrysler AG · US

Inventors

Rolf Klenk · Stuttgart, DE
Klaus Rössler · Altbach, DE
Alexander Stefani · Bittenfeld, DE
Guido Vent · Speyer, DE

Key dates

Filing date	Jul 27, 2001
Grant date	Nov 26, 2002
Priority date	—
Expiry date	Jul 27, 2021

Classification

Technology area (CPC H)Electricity
CPC primaryH02N2/067
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

In a device for controlling an injection valve which can be operated by a piezo-actuator and which comprises a charging and discharging circuit for the controlled charging of the piezo-actuator to a certain piezo-voltage, the charging and discharging circuit includes a power supply with a multitude of voltage levels which correspond to various valve opening positions and a switching device for the controlled switch-over between the plurality of voltage levels.

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