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Patent Searching and Data


Title:
FUEL INJECTOR
Document Type and Number:
WIPO Patent Application WO2000015959
Kind Code:
A9
Abstract:
A fuel injector (10) includes a spool control valve (39), a plunger (14) which moves in a fuel pressure chamber (23) between retracted and full stroke positions. The fuel injector (10) may include a spill port (43) for spilling fuel from the fuel pressure chamber (23), the spill port (43) being open at the start and closed by the translating motion of the plunger (14) to delay the start of injection. The fuel pressure chamber (23) may further include a control port (53) which is closed at the start of plunger motion and is opened by the plunger (14) to connect the pressure chamber (23) to a needle back chamber (44) to bias the needle valve (16) closed. The needle back chamber (44) becomes isolated from the pressure chamber (23) by further movement of the plunger (14) and includes a drain port (48) to allow the pressure in the needle back chamber (44) to decay upon control port (53) closure, thereby effecting split injection or rate shaping.

Inventors:
LEI NING
XILIN YANG
ARNOLD STEVEN C
Application Number:
PCT/US1999/020816
Publication Date:
August 10, 2000
Filing Date:
September 09, 1999
Export Citation:
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Assignee:
INT TRUCK AND ENGINE CORP (US)
International Classes:
F02M45/06; F02M47/00; F02M45/08; F02M51/00; F02M57/02; F02M59/10; F02M61/20; (IPC1-7): F02M37/04
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