Title:
FUEL INJECTION VALVE FOR COMBUSTION ENGINES
Document Type and Number:
WIPO Patent Application WO/2004/104406
Kind Code:
A1
Abstract:
The invention relates to a fuel injection valve for combustion engines, in which a valve seat (18) is provided whence at least one injection opening (20) departs. A valve needle (8) with a valve sealing surface (35), which is formed on the valve needle (8), interacts with the valve seat (18) whereby closing and opening the at least one injection opening (20). A first sealing edge (26) and a second sealing edge (28) are formed on the valve sealing surface (35) whereby, when the valve needle (8) is closed, the first sealing edge (26) rests against the valve seat (18) in a sealing manner upstream from the at least one injection opening (20), and the second sealing edge (28) is located downstream from the at least one injection opening (20). The valve needle (8) comprises, on its face oriented toward the valve seat (18), a recess (37) so that a sealing lip (40) is formed, which can be inwardly deformed in an elastic or ductile manner by the valve needle (8) resting upon the valve seat (18), and on which the second sealing edge (28) is formed.
Inventors:
MERTENS JOCHEN (DE)
Application Number:
PCT/DE2003/004022
Publication Date:
December 02, 2004
Filing Date:
December 06, 2003
Export Citation:
Assignee:
BOSCH GMBH ROBERT (DE)
MERTENS JOCHEN (DE)
MERTENS JOCHEN (DE)
International Classes:
F02M45/08; F02M61/04; F02M61/18; F02M63/00; (IPC1-7): F02M61/04; F02M61/18; F02M45/08
Domestic Patent References:
| WO2003040543A1 | 2003-05-15 |
Foreign References:
| DE19931891A1 | 2001-01-18 | |||
| DE10115216A1 | 2002-10-10 | |||
| DE10000501A1 | 2001-07-19 | |||
| DE10122389A1 | 2002-11-21 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 12 29 October 1999 (1999-10-29)
Attorney, Agent or Firm:
ROBERT BOSCH GMBH (Stuttgart, DE)
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