Patent · US Expired

Discharge circuit for a capacitive actuator

US6333585A · kind A · utility

4Cited by

10References

6Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

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

Key dates

Filing date	Aug 15, 2000
Grant date	Dec 25, 2001
Priority date	—
Expiry date	Aug 15, 2020

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D41/2096
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A capacitive actuator (P), especially for a piezoelectrically operated injection valve for an internal combustion engine, is short-circuited by a discharge switch (M) after an actuation, the controlling input of the discharge switch (M) being connected to the actuator (P) so that the discharge switch (M) in case of a failure of the external control, is automatically rendered conductive by the actuator voltage (U.sub.P) and the actuator (P) is therefore automatically discharged.

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