EP 1825134 B1 20091216 - FUEL INJECTION NOZZLE
Title (en)
FUEL INJECTION NOZZLE
Title (de)
KRAFTSTOFFEINSPRITZDÜSE
Title (fr)
INJECTEUR DE CARBURANT
Publication
Application
Priority
- EP 2005055656 W 20051031
- DE 102004057246 A 20041126
Abstract (en)
[origin: WO2006056522A1] Disclosed is a fuel injection nozzle (1) for internal combustion engines, comprising a nozzle member (2) with injection ports (11, 16), an outer valve needle (4) which is axially directed in a guiding bore (3) of the nozzle member (2), is embodied as a hollow needle, and controls injection of pressurized fuel through at least one first injection port (11), and an inner valve needle (5) that is coaxially guided within the outer valve needle (4) and controls injection of pressurized fuel through at least one second injection port (16). The inventive fuel injection nozzle (1) further comprises a plunger (17) which is guided in an axially movable manner and is provided with a first protrusion (22) that entrains the outer valve needle (4) in the opening direction thereof and a second protrusion (23) that entrains the inner valve needle (5) in the opening direction thereof following a preliminary lift (h<SUB>1</SUB>). The fuel injection nozzle (1) also comprises an actuator (19) for displacing the plunger (17), a first and a second rear nozzle chamber (25, 31 ), each of which is delimited by a control surface (24, 30) of the outer and inner valve needle (4, 5), respectively, said control surface (24, 30) being effective in the closing direction, a first control chamber (27) that is filled with fuel, is delimited by the plunger (17) in the opening direction, and is connected to the first rear nozzle chamber (25) via a throttle (26), as well as a second control chamber (33) which is filled with fuel, is delimited by the plunger (17) or an actuating member (18) of the actuator (19) in the opening direction, and is connected to the second rear nozzle chamber (31) via a throttle (32). The two valve needles (4, 5) can be displaced relative to the plunger (17) in the opening direction, counter to the effect of a closing spring (8, 12).
IPC 8 full level
F02M 45/08 (2006.01); F02M 51/06 (2006.01); F02M 61/20 (2006.01)
CPC (source: EP)
F02M 45/086 (2013.01); F02M 51/0603 (2013.01); F02M 61/205 (2013.01); F02M 2200/46 (2013.01); F02M 2200/505 (2013.01); F02M 2200/703 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DE 102004057246 A1 20060601; DE 502005008728 D1 20100128; EP 1825134 A1 20070829; EP 1825134 B1 20091216; JP 2008522069 A 20080626; WO 2006056522 A1 20060601
DOCDB simple family (application)
DE 102004057246 A 20041126; DE 502005008728 T 20051031; EP 05815589 A 20051031; EP 2005055656 W 20051031; JP 2007541904 A 20051031