EP 1963662 A1 20080903 - FUEL INJECTOR
Title (en)
FUEL INJECTOR
Title (de)
KRAFTSTOFFINJEKTOR
Title (fr)
INJECTEUR DE CARBURANT
Publication
Application
Priority
- EP 2006067848 W 20061027
- DE 102005059437 A 20051213
Abstract (en)
[origin: WO2007068526A1] The invention relates to a fuel injector having an injector housing (1) which comprises a pressure space (21, 17), from which highly pressurized fuel is injected into a combustion chamber of an internal combustion engine, as a function of the pressure in a nozzle needle control space (36), if a nozzle needle (8) lifts off from its seat, wherein the pressure in the nozzle needle control space (36) is controlled directly by a control valve device which comprises a piezoelectric actuator (48) which experiences an extension in length when it is charged. In order to provide a fuel injector which has improved injection performance and can be manufactured inexpensively, the control valve device comprises a valve piston (45) which is coupled to the piezoelectric actuator (48) and has a free end which is arranged in a valve piston control space (40), which is connected to the nozzle needle control space (36), and, in the charged state of the piezoelectric actuator (48), interrupts a hydraulic pressure relief connection (55) between the valve piston control space (40) and a pressure relief space (52).
IPC 8 full level
F02M 59/46 (2006.01); F02M 47/02 (2006.01); F02M 51/06 (2006.01); F02M 61/16 (2006.01); F02M 63/00 (2006.01)
CPC (source: EP US)
F02M 47/027 (2013.01 - EP US); F02M 61/167 (2013.01 - EP US); F02M 63/0026 (2013.01 - EP US); F02M 2547/003 (2013.01 - EP US)
Citation (search report)
See references of WO 2007068526A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
DE 102005059437 A1 20070614; CN 101331314 A 20081224; EP 1963662 A1 20080903; US 2008257980 A1 20081023; WO 2007068526 A1 20070621
DOCDB simple family (application)
DE 102005059437 A 20051213; CN 200680046975 A 20061027; EP 06807600 A 20061027; EP 2006067848 W 20061027; US 9424306 A 20061027