Single-winding dual-latching valve actuation solenoid
US6724606B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Mar 8, 2002 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | Aug 17, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L9/20
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A solenoid with two magnetically separate yoke regions, providing two distinct armature latching positions, is driven by a single effective winding. In one embodiment, the yoke regions consist of U-cores on either side of the armature and a single winding consisting of multiple turns, each turn looping through both U-cores and looping around the ends of the armature. In a second embodiment, distinct winding regions associated with the separate yoke regions are interconnected in series to make a single effective winding. Passage of the armature across a defined central position of minimum inductance is detected electrically, permitting a determination of absolute flux at a position of known inductance and thereby initializing a flux integration over time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.