Patent · US Expired

Control circuit for a solenoid valve

US5645097A · kind A · utility

20Cited by

2References

7Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Jurgen Zechmann · Heilbronn, DE
Berend-Wilhelm Doden · Ludwigsburg, DE
Michael Wolf · Mundelsheim, DE
Helmut Wiss · Heubach, DE

Key dates

Filing date	Oct 21, 1994
Grant date	Jul 8, 1997
Priority date	—
Expiry date	Oct 21, 2014

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/0318
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A solenoid valve control circuit for controlling an actuation current of a solenoid valve when the valve is to be adjusted from its flow-permitting position into its closed position so that the actuation current is initially adjusted to a value beyond the current value at which the valve begins to drop out. However, the actuation current is subsequently adjusted back to the range which lies between the current value at which the valve goes into the closed position and the current value at which the valve goes into its flow-permitting position.

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