Patent · US Expired

Apparatus and method for driving a piezoelectrically controlled fuel injection valve

US6109245A · kind A · utility

12Cited by

3References

8Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Klaus Egger · Wenzenbach, DE
Christian Hoffmann · Leonberg, DE
Wendelin Klugl · Dietenhofen, DE
Hellmut Freudenberg · Bad Abbach, DE
Detlev Schöppe · Wenzenbach, DE

Key dates

Filing date	Sep 21, 1999
Grant date	Aug 29, 2000
Priority date	—
Expiry date	Sep 21, 2019

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D41/221
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

An apparatus for driving a piezoelectrically controlled fuel injection valve includes a piezoelectric actuator having a discharging device and preferably a power MOSFET switch connected in parallel therewith. The discharging device is turned on by a monitoring device that is likewise connected in parallel with the piezoelectric actuator if an opening time of the piezoelectric actuator exceeds a predetermined monitoring time. The discharging device and the monitoring device are constructed as an integrated circuit (ASIC) and are integrated in a valve housing. A method for operating the apparatus is also provided.

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