Title:
FUEL INJECTION VALVE
Document Type and Number:
WIPO Patent Application WO/2003/042526
Kind Code:
A1
Abstract:
A nozzle body (4) having a fuel injection hole (41), a valve guide (17), a valve disc (5), a mover (6), and a stopper (16) are subjected to low temperature nitriding at 350-480°C. A guide sleeve (14) for guiding the movement of the mover (6) is press fitted to the inner circumference at the forward end of a fixed core (3) wherein the guide sleeve (14) is applied with a hard coating of high hardness nonmagnetic member. An annular tip type valve guide (7) and a guide retainer (18) are disposed, while being stacked, in the nozzle body (4). The guide retainer (18) is made of a metallic material not subjected to nitriding and bonded tightly to the inner circumference of the nozzle body (4) through plastic deformation caused by applying a pressing force from above in the nozzle body (4) thus securing the valve guide (17) by means of the guide retainer (18).
Inventors:
SHIMIZU SYUICHI (JP)
KAGIYAMA ARATA (JP)
GUNJI KENICHI (JP)
KAGIYAMA ARATA (JP)
GUNJI KENICHI (JP)
Application Number:
PCT/JP2001/010056
Publication Date:
May 22, 2003
Filing Date:
November 16, 2001
Export Citation:
Assignee:
HITACHI LTD (JP)
HITACHI CAR ENG CO LTD (JP)
SHIMIZU SYUICHI (JP)
KAGIYAMA ARATA (JP)
GUNJI KENICHI (JP)
HITACHI CAR ENG CO LTD (JP)
SHIMIZU SYUICHI (JP)
KAGIYAMA ARATA (JP)
GUNJI KENICHI (JP)
International Classes:
F02M21/02; F02M51/06; F02M61/16; F02M69/04; F02M63/00; (IPC1-7): F02M21/02; F02M51/08; F02M51/06; F02M61/04
Domestic Patent References:
| WO2001011225A1 | 2001-02-15 | |||
| WO1996000313A1 | 1996-01-04 |
Foreign References:
| JPH0754732A | 1995-02-28 | |||
| JPH07197352A | 1995-08-01 | |||
| JPH10121195A | 1998-05-12 | |||
| US5346137A | 1994-09-13 |
Other References:
See also references of EP 1452717A4
Attorney, Agent or Firm:
Ogawa, Katsuo (Yusenkayabacho Building 9-8,
Nihoonbashi-kayabacho 2-chom, Chuo-ku Tokyo, JP)
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