EP 1496246 A1 20050112 - Injection nozzle
Title (en)
Injection nozzle
Title (de)
Einspritzdüse
Title (fr)
Buse d'injection
Publication
Application
Priority
- EP 04251360 A 20040310
- EP 03254291 A 20030707
Abstract (en)
An injection nozzle (8) for an internal combustion engine is described. The injection nozzle (8) comprises: a nozzle body (9) provided with a blind bore (14) within which a valve needle (10) is moveable, the valve needle (10) being engageable with a seating surface (12) to control fuel flow between a supply chamber (29) and at least one injection nozzle outlet (16), the valve needle being provided with an annular groove (24) having an upstream edge defining an upper valve seating line (28a) and a downstream edge wherein, following wear in use, the lower edge becomes a lower valve seating line (28b) and the upper valve seating line (28a) and the lower valve seating line (28b) define an annular groove volume (38) therebetween, and wherein a surface of the bore (14) and the outer surface of the valve needle (10) define a first flow path through which fuel flows from the supply chamber (29) to the outlet(s) (16) when the valve needle is lifted from the seating surface (12), the nozzle (8) further including an additional flow path for said flow such that when, in use, the upper valve seating line (28a) and the lower valve seating line (28b) are in engagement with the seating surface (12), fuel is permitted to flow from the annular groove volume (38) to the at least one injection nozzle outlet via the additional flow path. The additional flow path may be defined by a fuel passageway (36) formed in the valve needle (10), and/or by one or more grooves (48) formed in the inner surface (50) of the nozzle body (9). <IMAGE> <IMAGE>
IPC 1-7
IPC 8 full level
F02M 61/04 (2006.01); F02M 61/18 (2006.01)
CPC (source: EP)
F02M 61/042 (2013.01); F02M 61/1873 (2013.01)
Citation (applicant)
- GB 2186632 A 19870819 - BOSCH GMBH ROBERT
- EP 1546547 A1 20050629 - BOSCH GMBH ROBERT [DE]
- US 5890660 A 19990406 - STEVENS JOHN WILLIAM [GB]
Citation (search report)
- [X] GB 2186632 A 19870819 - BOSCH GMBH ROBERT
- [X] DE 10020148 A1 20001116 - TOYOTA MOTOR CO LTD [JP]
- [X] US 2002179743 A1 20021205 - HAEBERER RAINER [DE], et al
- [E] WO 2004031570 A1 20040415 - BOSCH GMBH ROBERT [DE], et al
- [E] WO 2004027254 A1 20040401 - BOSCH GMBH ROBERT [DE]
- [E] WO 2004070197 A1 20040819 - BOSCH GMBH ROBERT [DE]
- [A] GB 2158151 A 19851106 - LUCAS IND PLC
- [A] US 5947389 A 19990907 - HASEGAWA TOSHIYUKI [JP], et al
- [A] DE 10109345 A1 20010830 - DENSO CORP [JP]
- [A] US 5950930 A 19990914 - POTZ DETLEV [DE], et al
- [A] PATENT ABSTRACTS OF JAPAN vol. 2000, no. 12 3 January 2001 (2001-01-03)
- [A] PATENT ABSTRACTS OF JAPAN vol. 1998, no. 14 31 December 1998 (1998-12-31)
Citation (examination)
EP 1546547 A1 20050629 - BOSCH GMBH ROBERT [DE]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
DOCDB simple family (application)
EP 04251360 A 20040310