Electromagnetic unit fuel injector with piston assist solenoid actuated control valve
US4550875A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 1984 |
| Grant date | Nov 5, 1985 |
| Priority date | — |
| Expiry date | Aug 6, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M59/466
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An electromagnetic unit fuel injector includes a pump assembly having an external actuated plunger reciprocable in a bushing with flow therefrom during a pump stroke being directed to a fuel injection nozzle of the assembly. Fuel flow from the pump can also flow through a passage means, containing a normally open, substantially pressure-balanced control valve actuated by a solenoid assembly in the valve closing direction to block drain flow during a pump stroke, as desired. A piston, actuated by discharge fuel pressure is operatively connected to the control valve to assist the solenoid in holding the control valve in a closed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.