Global Patent Index - EP 1692393 B1

EP 1692393 B1 20070725 - INJECTOR USED TO INJECT FUEL INTO INTERNAL COMBUSTION CHAMBERS IN INTERNAL COMBUSTION ENGINES, PARTICULARLY, A PIEZO-ACTUATOR CONTROLLED COMMON-RAIL-INJECTOR

Title (en)

INJECTOR USED TO INJECT FUEL INTO INTERNAL COMBUSTION CHAMBERS IN INTERNAL COMBUSTION ENGINES, PARTICULARLY, A PIEZO-ACTUATOR CONTROLLED COMMON-RAIL-INJECTOR

Title (de)

INJEKTOR ZUR EINSPRITZUNG VON KRAFTSTOFF IN BRENNRÄUME VON BRENNKRAFTMASCHINEN, INSBESONDERE PIEZOAKTORGESTEUERTER COMMON-RAIL-INJEKTOR

Title (fr)

INJECTEUR DESTINE A L'INJECTION DE CARBURANT DANS LES CHAMBRES DE COMBUSTION DE MOTEURS A COMBUSTION INTERNE, NOTAMMENT INJECTEUR A PRESSION MODULEE (COMMON-RAIL) COMMANDE PAR UN ACTIONNEUR PIEZO-ELECTRIQUE

Publication

EP 1692393 B1 20070725 (DE)

Application

EP 04786749 A 20040909

Priority

  • DE 2004002028 W 20040909
  • DE 10353169 A 20031114

Abstract (en)

[origin: WO2005050003A1] The invention relates to an injector which is used to inject fuel into internal combustion chambers in internal combustion engines, particularly, a piezo-actuator controlled common-rail-injector. Said injector comprises control means (17), particularly a piezo actuator (13), which are arranged in an injector body (10) and which actuate a control valve (20), which is disposed in a valve plate (18), by means of at least one multiplying piston (14). The invention also relates to a nozzle body (31) comprising a nozzle outlet which is disposed on the combustion chamber (free) side end thereof, a nozzle needle (33) which is arranged in an axially displaceable manner and/or which can is actuated in a longitudinal recess (32) of the nozzle body (31); a throttle disk (25) which is arranged between the nozzle body (31) and the control valve (20) and which is closed on the rear end (oriented away from the nozzle outlet) of the longitudinal recess (32). Said throttle disk forms an opening stop for the nozzle needle (33) which co-operates with the rear front surface (orientated away from the nozzle outlet) of the nozzle needle (33) and defines the opening stroke of the nozzle needle (33), and a control chamber (45) formed between the rear nozzle needle front surface and the throttle disk (25), said control chamber being hydraulically connected to a pressure connection (29) which is used to supply fuel. The invention is characterised in that a cylindrical retaining body (24) is arranged in the injector body (10), said retaining body receiving the multiplying piston(s) and the valve plate (18) containing the control valve (20).

IPC 8 full level

F02M 59/46 (2006.01); F02M 47/02 (2006.01); F02M 63/00 (2006.01)

CPC (source: EP)

F02M 47/027 (2013.01); F02M 63/0026 (2013.01); F02M 63/0045 (2013.01); F02M 2200/703 (2013.01); F02M 2547/001 (2013.01)

Citation (examination)

None

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

DOCDB simple family (publication)

WO 2005050003 A1 20050602; AT 368177 T 20070815; BR PI0416579 A 20070130; CN 1878949 A 20061213; DE 10353169 A1 20050616; DE 502004004465 D1 20070906; EP 1692393 A1 20060823; EP 1692393 B1 20070725; JP 2007510849 A 20070426; KR 20060120105 A 20061124; US 2007170286 A1 20070726

DOCDB simple family (application)

DE 2004002028 W 20040909; AT 04786749 T 20040909; BR PI0416579 A 20040909; CN 200480033400 A 20040909; DE 10353169 A 20031114; DE 502004004465 T 20040909; EP 04786749 A 20040909; JP 2006538640 A 20040909; KR 20067009230 A 20060512; US 57890404 A 20040909