Fuel injection valve for internal combustion engine

Details Fuel injection valve for internal combustion engine Fuel injection valve for internal combustion engine

2011-03-01

2011-03-01

Hwu, Davis (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Including valve means in flow line

Reciprocating

C239S585500

Reexamination Certificate

active

07896262

ABSTRACT:
A fuel injection valve has a valve guide, a valve member movable in a center opening of the valve guide along an axial direction of the valve guide, and a covering layer disposed on a surface of the valve guide. The valve guide has a valve seat placed on an inner surface thereof and a nozzle hole from which fuel is injected. The valve member is seated on the valve seat to close the nozzle hole and leaves the valve seat to open the nozzle hole. The covering layer is placed around an outlet opening of the nozzle hole. The covering layer is made of boron nitride in a hexagonal crystal system so as to have a hydrophilic property higher than that of the surface of the valve guide.

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patent: 2004/0187798 (2004-09-01), Schneider et al.
patent: 2005/0067512 (2005-03-01), Shimizu et al.
patent: WO 91/15611 (1991-10-01), None
patent: 3174321 (2001-03-01), None
patent: 2001-090638 (2001-04-01), None
Japanese Office Action dated Oct. 20, 2009, issued in corresponding Japanese Application No. 2007-332574, with English translation.

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