Electromagnetically actuated injection valve
US5918818A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 21, 1997 |
| Grant date | Jul 6, 1999 |
| Priority date | — |
| Expiry date | May 21, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/0665
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An injection valve with an injection hole includes a yoke, a fixed core surrounded by the yoke, a non-magnetic stopper between the yoke and the fixed core, a valve for opening and closing the injection hole, a movable core, whose axial movement is limited by the stopper, and an electromagnetic coil for attracting (when energized) the movable core to the fixed core. The movable core contacts the stopper and an air gap is formed between a surface of the movable core and at least one of the yoke and the fixed core. Since the movement of the movable core is limited by the stopper, the amount of movement by the movable core and the air gap formed between the surface of the movable core and at least one of the yoke and the fixed core are easily adjusted by adjusting the thickness of the stopper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.