Fuel injector and internal combustion engine having the same

Details Fuel injector and internal combustion engine having the same Fuel injector and internal combustion engine having the same

1998-02-25

2000-10-03

Yuen, Henry C.

Internal-combustion engines

Combustion chamber means having fuel injection only

Having a particular relationship between injection and...

239466, F02B 500

Patent

active

061258180

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.

REFERENCES:
patent: 3081952 (1963-03-01), Woodward et al.
patent: 3100084 (1963-08-01), Biber
patent: 4105163 (1978-08-01), Davis, Jr. et al.
patent: 4166577 (1979-09-01), Elwell
patent: 4192466 (1980-03-01), Tanasawa et al.
patent: 5098016 (1992-03-01), Okamoto et al.
patent: 5713205 (1998-02-01), Sciocchetti et al.
patent: 5740777 (1998-04-01), Yamamoto et al.

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