EP 1201905 B1 20051214 - A device for detecting failure in a high pressure fuel supply system
Title (en)
A device for detecting failure in a high pressure fuel supply system
Title (de)
Vorrichtung zur Erkennung von Fehlern in einer Hochdruck-Kraftstoffeinspritzanlage
Title (fr)
Dispositif de detection de défaut dans un système d'alimentation en carburant haute pression
Publication
Application
Priority
JP 2000329448 A 20001027
Abstract (en)
[origin: EP1201905A2] Fuel of a high pressure is supplied from a high-pressure fuel injection pump 5 into a common-rail 3, and is, then, supplied to the fuel injection valves 1 from the common-rail. A control circuit (ECU) 20 compares a change in the fuel pressure in the common-rail detected by a fuel pressure sensor 31 during a judging period with an estimated value of change in the pressure during the judging period to judge the leakage of fuel from the common-rail. The judging period is set to take place in a period in which it is estimated that the fuel flows in the least amount into a pressure-accumulating chamber in the former half or in the latter half of the fuel supply stroke of the fuel pump. This minimizes the effect of fuel flowing into the common-rail, and improves the accuracy of leakage detection. <IMAGE>
IPC 1-7
IPC 8 full level
F02D 45/00 (2006.01); F02D 41/22 (2006.01); F02D 41/38 (2006.01)
CPC (source: EP)
F02D 41/22 (2013.01); F02D 41/3809 (2013.01); F02D 2041/224 (2013.01); F02D 2041/225 (2013.01)
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 1201905 A2 20020502; EP 1201905 A3 20030924; EP 1201905 B1 20051214; DE 60115812 D1 20060119; DE 60115812 T2 20060810; ES 2252131 T3 20060516; JP 2002130023 A 20020509; JP 3798615 B2 20060719
DOCDB simple family (application)
EP 01125541 A 20011025; DE 60115812 T 20011025; ES 01125541 T 20011025; JP 2000329448 A 20001027