Fuel injector nozzle
US6491237B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2000 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | Jun 12, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M57/02
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel injector nozzle is disclosed which solves a long-standing problem in the industry of reducing polluting engine emissions. The nozzle has a needle which alternately blocks and leaves open spray holes for delivering fuel to the combustion chamber. The needle is received in a cavity where the injector needle seats. Machining the seat of the cavity causes a sac at the nozzle tip where the unburned fuel causes the polluting emissions. Minimizing the sac volume minimizes the polluting emissions. The present invention discloses a nozzle formed with a seat having an apex located at the bottom of a sac. The design of the present minimizes the sac volume and the sac volume is closer to zero volume than any prior design.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.