Fuel injector and internal combustion engine having the same
US6125818A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 25, 1998 |
| Grant date | Oct 3, 2000 |
| Priority date | — |
| Expiry date | Feb 25, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49432
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A laminated fuel swirl element is employed, in which a strong swirl force flow is imparted to the fuel at a remote position relative to an injection hole, while on the other hand, at a position near the fuel injection hole, a weak swirl force is imparted to the fuel. A complex solid cone spray can be obtained in this way, which spray has a superior dispersion characteristic obtained by attracting small diameter droplets, which are generated at an outer peripheral portion of the spray, through a spray portion which is generated in the vicinity of a central area of the spray and has a large velocity. As to the spray characteristics in an electromagnetic fuel injector of the direct injection type for use in a gasoline engine, a complex solid cone spray can be obtained, and, as a result a good ignitability of the engine can be obtained by a spray portion having a small spreading angle produced by making the inertia force strong, and the amount of the unburned gas components of the combustion can be reduced by a spray portion having a short distance or extent of travel and a large spreading angle produced by making the inertia force weak.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.