Fuel injection valve

Details Fuel injection valve Fuel injection valve

2008-03-11

2008-03-11

Hwu, David D. (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Unitary injection nozzle and pump or accumulator plunger

C239S089000, C239S533200, C239S533120, C239S533140, C239S585100, C239S585500

Reexamination Certificate

active

11234380

ABSTRACT:
In a fuel injection valve in which a funnel-shaped fuel collecting recess35is provided between a valve seat8and an outlet hole7, and a flat fuel diffusion chamber36which diffuses a fuel radially outward and guides the fuel to a plurality of fuel injection holes11is provided between opposed surfaces of a valve seat member3and an injector plate10, a seating portion16ahaving a spherical band shape, and a valve tip end portion16bwhich projects into a cone shape toward a center of the outlet hole7from the seating portion16aand leaves its top portion in the outlet hole7even at the time of valve opening of a valve body18are formed at the valve body18, a cone angle α of the valve tip end portion16bis set to be larger than a funnel angle β of the fuel collecting recess35, and an inner peripheral surface7A of the outlet hole7is formed along an inner peripheral side curved surface of a virtual torus T so that the inner peripheral surface is connected to a bottom surface of the fuel collecting recess35and a ceiling surface of the fuel diffusion chamber36. Thus, generation of eddies at the time of reverse of the fuel flow in the outlet hole of the valve seat member is prevented to reduce pressure loss of the fuel, thereby suppressing decrease in the amount of injected fuel, promoting atomization of the injected fuel and stabilizing spray forms.

REFERENCES:
patent: 5755386 (1998-05-01), Lavan et al.
patent: 5788161 (1998-08-01), Potz et al.
patent: 6105884 (2000-08-01), Molnar et al.
patent: 6131826 (2000-10-01), Teiwes
patent: 6170763 (2001-01-01), Fuchs et al.
patent: 6616071 (2003-09-01), Kitamura et al.
patent: 6779743 (2004-08-01), Kitamura
patent: 63-154767 (1988-10-01), None
patent: 2-067459 (1990-03-01), None
patent: 9-250423 (1997-02-01), None
patent: 9-137764 (1997-05-01), None
patent: 10-507507 (1998-07-01), None
patent: 10-281041 (1998-10-01), None
patent: 2000-97129 (2000-04-01), None
patent: 2002-130074 (2002-05-01), None

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