EP 1163442 A1 20011219 - FUEL INJECTION NOZZLE
Title (en)
FUEL INJECTION NOZZLE
Title (de)
KRAFTSTOFF-EINSPRITZDÜSE
Title (fr)
INJECTEUR DE CARBURANT
Publication
Application
Priority
- DE 0100016 W 20010105
- DE 10000574 A 20000110
Abstract (en)
[origin: WO0151806A1] The invention relates to a fuel injection nozzle comprising a nozzle body which is provided with at least one nozzle hole (12) and a conical bearing surface (14). The inventive nozzle also comprises a nozzle needle (16) which can be displaced in the nozzle body and is provided with an inlet surface (18) as well as a radial step (20) arranged downstream in relation to and adjacent to the inlet surface. A sealing seat is thus formed in the transitional area with the inlet surface. Said sealing seat can engage with the bearing surface. The aim of the invention is to meter fuel for the pre-injection in a more accurate manner. According to the invention, an angle that is enclosed between the centre line of the injection nozzle and a tangent which is adjacent to the radial step in the area of the sealing seat amounts to more than 45 DEG . A circumference groove (24) is formed downstream in relation to and adjacent to the radial step. Said groove extends at least to the nozzle hole (12) in such a way that the narrowest cross-section is produced between the nozzle needle and the nozzle body in the region of the sealing seat for pre-injection purposes when the nozzle needle performs an opening lift movement.
IPC 1-7
IPC 8 full level
F02M 61/18 (2006.01)
CPC (source: EP KR US)
F02M 61/16 (2013.01 - KR); F02M 61/18 (2013.01 - EP US)
Citation (search report)
See references of WO 0151806A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 0151806 A1 20010719; BR 0103895 A 20011218; CN 1188591 C 20050209; CN 1358256 A 20020710; DE 10000574 A1 20010719; DE 50106669 D1 20050811; EP 1163442 A1 20011219; EP 1163442 B1 20050706; JP 2003519758 A 20030624; KR 20010102515 A 20011115; PL 349996 A1 20021021; US 2003057299 A1 20030327
DOCDB simple family (application)
DE 0100016 W 20010105; BR 0103895 A 20010105; CN 01800047 A 20010105; DE 10000574 A 20000110; DE 50106669 T 20010105; EP 01903592 A 20010105; JP 2001551985 A 20010105; KR 20017011329 A 20010906; PL 34999601 A 20010105; US 93621702 A 20020205