EP 1727978 A1 20061206 - FUEL-INJECTION SYSTEM WITH REDUCED PRESSURE PULSATIONS IN THE RETURN RAIL
Title (en)
FUEL-INJECTION SYSTEM WITH REDUCED PRESSURE PULSATIONS IN THE RETURN RAIL
Title (de)
KRAFTSTOFFEINSPRITZANLAGE MIT VERRINGERTEN DRUCKSCHWINGUNGEN IM RÜCKLAUFRAIL
Title (fr)
SYSTEME D'INJECTION DE CARBURANT A ONDES DE PRESSION REDUITES DANS LA CONDUITE DE RETOUR
Publication
Application
Priority
- DE 2004000881 W 20040427
- DE 10328000 A 20030621
Abstract (en)
[origin: WO2005001280A1] The invention relates to a fuel-injection system (1) for an internal combustion engine, comprising: at least one injector (3) for injecting fuel into a combustion chamber of a motor, said injector having a high-pressure connection (10), via which it receives a supply of fuel at high pressure, a control valve (64) for controlling the injections of the injector and a low-pressure connection (12) for discharging a controlled quantity of fuel that is accumulated during the control of the injection; and a leakage line (11), which is connected to a fuel-return line (17) by the interposition of a pressure-holding valve (15), which opens in the direction of the fuel-return line when a predefined pressure is exceeded. Said system is characterised in that it is equipped with a throttle device (20) in the vicinity of the pressure-holding valve (15), said device being configured and located in such a way that when the pressure-holding valve is open, a reflection of pressure waves emanating from the injector in the form of negative-pressure waves is damped. Negative-pressure waves emanating from the pressure-holding valve towards the leakage line of the injector are damped or prevented. This reduces the risk of damage caused by cavitation.
IPC 8 full level
F02M 55/00 (2006.01); F02M 47/02 (2006.01); F02M 55/04 (2006.01); F02M 57/02 (2006.01); F02M 63/00 (2006.01); F02M 69/54 (2006.01)
CPC (source: EP KR)
F02M 37/0052 (2013.01 - EP); F02M 47/02 (2013.01 - KR); F02M 47/027 (2013.01 - EP); F02M 55/00 (2013.01 - KR); F02M 55/002 (2013.01 - EP); F02M 55/04 (2013.01 - EP KR); F02M 57/02 (2013.01 - KR); F02M 69/54 (2013.01 - EP); F02M 57/02 (2013.01 - EP); F02M 2200/04 (2013.01 - EP); F02M 2200/28 (2013.01 - EP); F02M 2200/30 (2013.01 - EP); F02M 2200/315 (2013.01 - EP)
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 2005001280 A1 20050106; AT E492720 T1 20110115; DE 10328000 A1 20050113; DE 502004012034 D1 20110203; EP 1727978 A1 20061206; EP 1727978 B1 20101222; JP 2006523793 A 20061019; KR 20060028699 A 20060331
DOCDB simple family (application)
DE 2004000881 W 20040427; AT 04729610 T 20040427; DE 10328000 A 20030621; DE 502004012034 T 20040427; EP 04729610 A 20040427; JP 2006500491 A 20040427; KR 20057024415 A 20051220