EP 1520099 B1 20060322 - BOOSTED FUEL INJECTOR WITH RAPID PRESSURE REDUCTION AT END OF INJECTION
Title (en)
BOOSTED FUEL INJECTOR WITH RAPID PRESSURE REDUCTION AT END OF INJECTION
Title (de)
DRUCKÜBERSETZER KRAFTSTOFFINJEKTOR MIT SCHNELLEM DRUCKABBAU BEI EINSPRITZENDE
Title (fr)
INJECTEUR DE CARBURANT A MULTIPLICATEUR DE PRESSION A REDUCTION DE PRESSION RAPIDE LORS DE L'INJECTION
Publication
Application
Priority
- DE 0301098 W 20030403
- DE 10229419 A 20020629
Abstract (en)
[origin: WO2004003376A1] The invention relates to a device for injecting fuel into the combustion chamber (7) of an internal combustion engine. The device for injecting fuel comprises a high-pressure accumulator chamber (2) (common rail), a booster (5) and a metering valve (6). The booster (5) comprises a working chamber (10) and a control chamber (11) that are separated by an axially displaceable piston (12; 13, 14). A pressure change in the control chamber (11) of the booster (5) results in a pressure change in the compression chamber (15) of the booster (5). The compression chamber (15) impinges a nozzle chamber (22) in the nozzle body (4) surrounding an injection valve member (26) via a fuel inlet (21). A pressure relief valve (40) is disposed in a control line (20, 49) between the control chamber (11) of the booster (5) and a metering valve (6) that is configured as a 2/2 way valve. Said pressure relief valve comprises a valve body (43, 54) that impinges at least one hydraulic chamber (41, 42) of the pressure relief valve (40) and that can be linked with the pressure prevailing in the high-pressure accumulator chamber (2).
IPC 8 full level
F02M 47/00 (2006.01); F02M 59/10 (2006.01); F02M 45/00 (2006.01); F02M 47/02 (2006.01); F02M 57/02 (2006.01); F02M 61/10 (2006.01)
CPC (source: EP US)
F02M 45/00 (2013.01 - EP US); F02M 47/027 (2013.01 - EP US); F02M 57/025 (2013.01 - EP US); F02M 57/026 (2013.01 - EP US); F02M 59/105 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 2004003376 A1 20040108; DE 10229419 A1 20040129; DE 50302741 D1 20060511; EP 1520099 A1 20050406; EP 1520099 B1 20060322; JP 2005531712 A 20051020; US 2004231645 A1 20041125; US 6892703 B2 20050517
DOCDB simple family (application)
DE 0301098 W 20030403; DE 10229419 A 20020629; DE 50302741 T 20030403; EP 03722254 A 20030403; JP 2004516438 A 20030403; US 48889504 A 20040308