Injection nozzle

Fluid sprinkling – spraying – and diffusing – Fluid pressure responsive discharge modifier* or flow... – Fuel injector or burner

Reexamination Certificate

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Details

C239S102200, C239S533300, C239S533120, C239S584000

Reexamination Certificate

active

07871021

ABSTRACT:
The invention relates to a fuel injection valve for internal combustion engines, comprising a valve body (1), with a drilling (3) embodied therein and defined at the combustion chamber end thereof by a conical valve seat (18) from which at least one injection opening (20) leads. A hollow valve needle (8) is arranged in the drilling (3) such as to be displaced longitudinally, comprising a valve sealing surface (35) at the end thereof facing the valve seat (18). A first sealing region (31; 34) and a second sealing region (32; 46; 48) are embodied on the valve sealing surface (35), whereby, on contact of the hollow valve needle (8) on the valve seat (18), the first sealing region (31; 34) provides a seal upstream of the at least one injection opening (20) and the second sealing region (32; 46; 48) downstream thereof.

REFERENCES:
patent: 4382554 (1983-05-01), Hofmann
patent: 4407457 (1983-10-01), Seifert
patent: 6412712 (2002-07-01), Buckley
patent: 6811103 (2004-11-01), Gurich et al.
patent: 7159799 (2007-01-01), Cooke
patent: 7309030 (2007-12-01), Cooke
patent: 7404526 (2008-07-01), Cooke et al.
patent: 2003/0025006 (2003-02-01), Scarbrough et al.
patent: 2007/0012798 (2007-01-01), Cooke
patent: 0054612 (1982-06-01), None
patent: 0878623 (1998-11-01), None
patent: 1069308 (2001-01-01), None
patent: 1526274 (2005-04-01), None
patent: 02/06665 (2002-01-01), None
patent: 2004/044414 (2004-05-01), None

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