Title:
FUEL INJECTOR SEAT WITH A SHARP EDGE
Document Type and Number:
WIPO Patent Application WO2000065227
Kind Code:
A9
Abstract:
A fuel injector seat (64) for a fuel injector assembly, and more particularly for a high-pressure fuel injector assembly, having a number of features for minimizing the formation of combustion chamber deposits on the seat (64), providing a selected finish on a needle-sealing portion, and reducing sac volume. These features include positioning a transition portion between the needle-sealing portion and an orifice portion, positioning a sharp edge (606) at the outlet of the orifice portion, and applying a coating to certain surfaces of the seat. This invention also relates to a fuel injector seat and method of manufacturing the fuel injector seat, and a method of evaluating when the transition portion is required between the orifice and needle-sealing portions for a particular seat arrangement.
Inventors:
IMOEHL WILLIAMS JAMES
HALL BRYAN
HALL BRYAN
Application Number:
PCT/US2000/011178
Publication Date:
June 13, 2002
Filing Date:
April 27, 2000
Export Citation:
Assignee:
SIEMENS AUTOMOTIVE CORP LP (US)
International Classes:
F02B33/44; F02M51/06; F02M61/12; F02M61/16; F02M61/18; (IPC1-7): F02M61/16; F02M61/18
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