NEEDLE LIFT DAMPER DEVICE OF INJECTOR FOR FUEL INJECTION AND NEEDLE LIFT DAMPING METHOD

Title:

NEEDLE LIFT DAMPER DEVICE OF INJECTOR FOR FUEL INJECTION AND NEEDLE LIFT DAMPING METHOD

Document Type and Number:

WIPO Patent Application WO/2002/040854

Kind Code:

A1

Abstract:

An injector (8b) for fuel injection capable of always providing a stable needle lift damping effect by relieving a fuel pressure inside a pressure control chamber (37) so as to lift a needle valve (36), comprising a damper member (62) installed slidably in a needle valve (36), a damping chamber (63) formed between the damper member (62) and the needle valve (36), a leak passage (64) allowing fuel inside the damping chamber (63) to be throttled and leaked, and a stopper member (41) limiting the upper position of the damper member (62), wherein fuel inside the damping chamber (63) is leaked after throttled by the leak passage (64) so as to damp the lift of the needle valve (36), whereby the needle valve (36) performs a damper member (62) guiding function, the damper member (62) is prevented from being wobbled, and a stable needle lift damping effect can be provided at all times.

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Inventors:

NISHIMURA TERUKAZU (JP)
MINATO AKIHIKO (JP)
TAKASE SHIGEHISA (JP)
FUJITA MAHORO (JP)
BREITBACH HERMANN (LU)

Application Number:

PCT/JP2000/008137

Publication Date:

May 23, 2002

Filing Date:

November 17, 2000

Export Citation:

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Assignee:

ISUZU MOTORS LTD (JP)
DELPHI TECH INC (US)
NISHIMURA TERUKAZU (JP)
MINATO AKIHIKO (JP)
TAKASE SHIGEHISA (JP)
FUJITA MAHORO (JP)
BREITBACH HERMANN (LU)

International Classes:

F02M47/02; F02M55/04; F02M63/00; (IPC1-7): F02M47/00; F02M47/02; F02M61/10; F02M61/20

Foreign References:

JPH0666218A	1994-03-08
JPH02146255A	1990-06-05
JPH0579422A	1993-03-30
JPH0711996A	1995-01-13
JP2000329024A	2000-11-28

Other References: