Fuel injector having non contacting valve closing orifice structure
US5954033A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 9, 1996 |
| Grant date | Sep 21, 1999 |
| Priority date | — |
| Expiry date | Dec 9, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/88038
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injector having a housing with a bore, a tip, and an orifice through the tip and a check having a first end, a second end, and a check guide portion reciprocatable in the bore between first and second positions which, respectively, obstruct and provide fluid communication through the orifice. The check and housing respectively have a primary check seat disposed between the first and second ends and a primary nozzle seat disposed nearer said check guide portion than said tip. The primary check seat being engageable with the primary nozzle seat with a first engagement force when the check is in its first position. The check and housing respectively preferably also include a secondary check seat and a secondary nozzle seat which are engageable with a second engagement force, less than the first engagement force, when the check is in its first position. Having primary obstruction of fuel through the orifice by cooperating check seat and nozzle seat structures which are distally disposed relative to the tip provides a more reliable fuel injector and enables improved utilizing engine performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.