EP 1563182 B1 20120111 - INJECTOR WITH A DIRECTLY-ACTUATED COMPOUND NOZZLE NEEDLE FOR FUEL INJECTION IN AN INTERNAL COMBUSTION ENGINE
Title (en)
INJECTOR WITH A DIRECTLY-ACTUATED COMPOUND NOZZLE NEEDLE FOR FUEL INJECTION IN AN INTERNAL COMBUSTION ENGINE
Title (de)
INJEKTOR MIT EINER DIREKT ANGETRIEBENEN REGISTER-DÜSENNADEL FÜR DIE KRAFTSTOFFEINSPRITZUNG IN EINEN VERBRENNUNGSMOTOR
Title (fr)
INJECTEUR DOTE D'UN POINTEAU A NIVEAUX A ENTRAINEMENT DIRECT POUR L'INJECTION DE CARBURANT DANS UN MOTEUR A COMBUSTION INTERNE
Publication
Application
Priority
- DE 0303850 W 20031120
- DE 10254186 A 20021120
Abstract (en)
[origin: WO2004046540A1] A piezoelectric injector with a directly-actuated compound nozzle needle (5) for fuel injection in an internal combustion engine is disclosed. Both nozzle needles (15, 17) of the compound nozzle needle (5) are operated for opening the injection holes (16, 19) not as conventionally by means of a fuel pressure generated in the injector or by means of a servo valve, but rather directly by the piezoelectric actuator (3). The actuator (3) can thus advantageously directly control both nozzle needles (15, 17) by means of the amplitude of the control voltage applied thereto. In the inactive state, pressure springs (11; 20, 21) hold the injection holes (16, 19) of both stages closed.
IPC 8 full level
F02M 45/08 (2006.01); F02M 47/04 (2006.01); F02M 51/06 (2006.01); F02M 61/16 (2006.01); F02M 63/00 (2006.01)
CPC (source: EP)
F02M 45/086 (2013.01); F02M 51/0603 (2013.01); F02M 61/167 (2013.01); F02M 63/0026 (2013.01); F02M 2200/46 (2013.01); F02M 2200/701 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 2004046540 A1 20040603; DE 10254186 A1 20040617; EP 1563182 A1 20050817; EP 1563182 B1 20120111
DOCDB simple family (application)
DE 0303850 W 20031120; DE 10254186 A 20021120; EP 03767443 A 20031120