EP 1613855 B1 20071128 - FUEL INJECTOR PROVIDED WITH A SERVO LEAKAGE FREE VALVE
Title (en)
FUEL INJECTOR PROVIDED WITH A SERVO LEAKAGE FREE VALVE
Title (de)
KRAFTSTOFFINJEKTOR MIT LECKAGEFREIEM SERVOVENTIL
Title (fr)
INJECTEUR DE CARBURANT COMPORTANT UNE SOUPAPE ASSERVIE LIBRE DE FUITES
Publication
Application
Priority
- DE 2004000412 W 20040304
- DE 10315016 A 20030402
Abstract (en)
[origin: WO2004088121A1] The invention relates to a fuel injector (18) for injecting a fuel into the combustion chamber of an internal combustion engine. The inventive injector comprises a pressure relay valve (3) whose pressure relay piston (4) separates the working chamber (5) continuously receiving the fuel supplied by a pressure source (1,2) from a differential decompression pressure chamber (6). A pressure fluctuation is produced in said differential pressure chamber (6) by means of a servo valve (22) whose control chamber (36) can be released from pressure by means of a switch valve (32) which closes or opens a hydraulic connection (21, 38, 30) between the differential pressure chamber (6) and a first return run (30) on a low-pressure side. Said fuel injector is characterised in that when the pressure relay valve (3) is deactivated, the high pressure area of the servo valve (22) which closes the control chamber (36), a first hydraulic chamber (37) and a second hydraulic chamber (38) are sealed with respect to the return run (30) by means of a sealing surface (24).
IPC 8 full level
F02M 59/10 (2006.01); F02M 47/02 (2006.01); F02M 57/02 (2006.01); F02M 59/46 (2006.01); F02M 61/20 (2006.01); F02M 63/00 (2006.01)
CPC (source: EP US)
F02M 57/025 (2013.01 - EP US); F02M 59/105 (2013.01 - EP US); F02M 59/46 (2013.01 - EP US); F02M 59/466 (2013.01 - EP US); F02M 61/205 (2013.01 - EP US); F02M 63/0005 (2013.01 - EP US); F02M 63/0007 (2013.01 - EP US); F02M 63/0029 (2013.01 - EP US); F02M 47/025 (2013.01 - EP US); F02M 47/027 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 2004088121 A1 20041014; DE 10315016 A1 20041028; DE 502004005606 D1 20080110; EP 1613855 A1 20060111; EP 1613855 B1 20071128; US 2006011735 A1 20060119; US 7188782 B2 20070313
DOCDB simple family (application)
DE 2004000412 W 20040304; DE 10315016 A 20030402; DE 502004005606 T 20040304; EP 04717029 A 20040304; US 53070904 A 20040304