EP 1627148 A1 20060222 - FUEL INJECTION VALVE FOR INTERNAL COMBUSTION ENGINES
Title (en)
FUEL INJECTION VALVE FOR INTERNAL COMBUSTION ENGINES
Title (de)
KRAFTSTOFFEINSPRITZVENTIL FÜR BRENNKRAFTMASCHINEN
Title (fr)
SOUPAPE D'INJECTION DE CARBURANT POUR MOTEUR A COMBUSTION INTERNE
Publication
Application
Priority
- DE 0302817 W 20030822
- DE 10313225 A 20030325
Abstract (en)
[origin: WO2004085832A1] The invention relates to a fuel injection valve comprising a valve body (1) containing a borehole (3) which is defined, on the combustion chamber end thereof, by a conical valve seat (13) from which a plurality of injection channels (11) extend, said injection channels having inlets (16) which are located in the valve seat (13) at the same height in relation to the longitudinal axis (7) of the borehole (3). A valve needle (5; 60; 62) is arranged in the borehole (3) in such a way that it can be longitudinally displaced, and a pressure chamber (20) is embodied between the wall of the borehole (3) and the valve needle (5; 60; 62). Said pressure chamber can be filled with fuel. A first conical surface (40) and a second conical surface (42) arranged downstream from the first are located on the combustion chamber end of the valve needle (5; 60; 62), a tight edge (45) being formed between said conical surfaces (40; 42). A peripheral first annular groove (50) is embodied in the second conical surface (42) of the valve needle (5; 60; 62), said annular groove extending in a radial plane in relation to the longitudinal axis (7) of the valve needle (5; 60; 62) and comprising an upstream edge (51) and a downstream edge (52), the downstream edge (52) extending, in the closing position of the valve needle (5; 60; 62), at the same level as the inlets (16) of the injection channels (11).
IPC 1-7
IPC 8 full level
F02M 45/08 (2006.01); F02M 47/02 (2006.01); F02M 61/10 (2006.01); F02M 61/18 (2006.01)
CPC (source: EP)
F02M 45/086 (2013.01); F02M 47/02 (2013.01); F02M 61/10 (2013.01); F02M 61/1873 (2013.01)
Citation (search report)
See references of WO 2004085832A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DE 10313225 A1 20041007; CN 1759240 A 20060412; EP 1627148 A1 20060222; JP 2006514210 A 20060427; WO 2004085832 A1 20041007
DOCDB simple family (application)
DE 10313225 A 20030325; CN 03826217 A 20030822; DE 0302817 W 20030822; EP 03747819 A 20030822; JP 2004569830 A 20030822