Fuel injection systems
US4300873A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1979 |
| Grant date | Nov 17, 1981 |
| Priority date | — |
| Expiry date | Nov 16, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M51/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injection system includes a pumping plunger contained in a cylinder and actuated in a direction to pump fuel from the cylinder by energization of an electromagnetic device including an armature. Stop means is provided to limit the movement of the armature when the device is energized and this includes a high rate spring constituted by a dished washer which is compressed by the armature during the final movement thereof. The washer is sufficiently strong to urge the armature in the opposite direction against the magnetic forces produced by the device, by an amount sufficient to bring about a reduction in the pressure in the cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.