Fuel injection valve

Details Fuel injection valve Fuel injection valve

2008-03-04

2008-03-04

Hwu, Davis D. (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Unitary injection nozzle and pump or accumulator plunger

C239S091000, C239S533200, C239S533120, C239S585100, C239S585300, C239S585400, C239S585500

Reexamination Certificate

active

10544390

ABSTRACT:
In a fuel injection valve for slanted fuel injection, provided between a conical flow path and an injection port is an intermediate flow path having a cylindrical surface coaxial to the conical flow path, so that the injection port has a portion of the cylindrical surface connected to the conical surface of the conical flow path and another portion of the cylindrical surface connected to the cylindrical surface of the intermediate flow path, whereby generation of stagnation of flow of fuel is suppressed to decrease the formation of the carbon deposit. The intermediate flow path has a tapered conical surface that is connected to a downstream side end portion of said cylindrical surface and that includes a diameter gradually decreases in the direction of flow of fuel to cope with where the injection port diameter is small. A cone apex angle of the conical surface of the intermediate flow path is smaller than a cone apex angle of the valve seat surface.

REFERENCES:
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patent: 5033679 (1991-07-01), Golev et al.
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patent: 5890660 (1999-04-01), Stevens
patent: 5979801 (1999-11-01), Munezane et al.
patent: 6168095 (2001-01-01), Seitter et al.
patent: 6739525 (2004-05-01), Dantes et al.
patent: 10-184496 (1998-07-01), None
patent: 2000-303934 (2000-10-01), None
patent: 2002-364497 (2002-12-01), None

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