Injector
US5992767A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1998 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Jan 9, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M61/205
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An injector is disclosed which comprises a valve needle engageable with a seating. A spring urges the needle towards its seating, the spring engaging a spring abutment. A pressure backing member positioned within the injector is slidable relative to the spring abutment under the action of the pressure of fuel applied thereto. The pressure backing member is engageable with a surface associate with the needle to urge the needle towards its seating. The slidable pressure backing member reduces the pressure in the pumping chamber both prior to and after termination of the injection process. Also, the backing member maintains the pressure in a fuel supply passage of a low level to enhance the efficiency of the injector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.