Patent · US Expired

Method and apparatus for determining the armature impact time when a solenoid valve is de-energized

US5650909A · kind A · utility

30Cited by

2References

11Claims

0Family size

Assignee

MTU Motoren-und Turbinen-Union · DE

Inventors

Jörg Remele · Hagnau, DE
Andreas Schneider · Leonberg, DE

Key dates

Filing date	Sep 18, 1995
Grant date	Jul 22, 1997
Priority date	—
Expiry date	Sep 18, 2015

Classification

Technology area (CPC H)Electricity
CPC primaryH01F2007/1684
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

This invention relates to a method and apparatus for recognizing the impact time of a solenoid valve armature during de-energizing. In order to obtain a detectable impact signal of the armature, a measuring current is provided in the magnet coil during the armature's downward movement to generate a magnetic measuring field. When this magnetic measuring field is changed due to the armature movement, an induction voltage is generated, which is monitored to detect the time of impact of the armature.

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