Apparatus for measuring the mechanical motion of a magnet valve armature for controlling fuel injection in a fuel injection system
US5311903A · kind A · utility
12Cited by
5References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1992 |
| Grant date | May 17, 1994 |
| Priority date | — |
| Expiry date | Dec 23, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8242
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention is directed to a magnet valve having a magnet coil and a magnet armature, which are coaxially surrounded by a secondary coil that measures the inductions arriving in the magnet coil. According to the invention, those inductions that arise in the magnet coil not only from a current flowing there but also by the motion of the magnet armature in the magnet coil are measured while the current is turned off. As a result, the instant at which the magnet armature begins its return stroke is detected exactly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.