EP 1039117 B1 20041020 - Method and determining abnormality in high-pressure fuel injection system
Title (en)
Method and determining abnormality in high-pressure fuel injection system
Title (de)
Fehlererkennungverfahren für ein Hochdruck-Kraftstoffeinspritzsystem
Title (fr)
Méthode d'identification d'anomalies dans un système d'injection à haute pression
Publication
Application
Priority
JP 8382499 A 19990326
Abstract (en)
[origin: EP1039117A2] The present invention proposes a method of abnormality determination for a high-pressure fuel injection system, which is capable of enlarging a range where a fuel force-feed timing or a fuel injection timing can be changed, and of determining occurrence of an abnormality with high precision. An electronic control unit (ECU)(60) detects a change in fuel pressure in a common rail (20) (rail pressure change amount), estimates a change in rail pressure based on an injection command value, a force-feed command value and the like, and makes a first abnormality determination based on the detected value and the estimated value. If occurrence of an abnormality is confirmed in the first abnormality determination, the ECU (60) restricts a timing for starting force-feeding of fuel such that only fuel injection is carried out in a second determination period. The ECU (60) then compares a detected value of a change in rail pressure with a value of a change in rail pressure estimated based on the injection command value and the like, and additionally makes a second abnormality determination. <IMAGE>
IPC 1-7
IPC 8 full level
F02M 63/00 (2006.01); F02D 41/22 (2006.01); F02D 41/38 (2006.01); F02D 45/00 (2006.01); F02M 65/00 (2006.01)
CPC (source: EP)
F02D 41/22 (2013.01); F02D 41/3809 (2013.01); F02D 2041/224 (2013.01); F02D 2200/0604 (2013.01)
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 1039117 A2 20000927; EP 1039117 A3 20030319; EP 1039117 B1 20041020; DE 60014997 D1 20041125; DE 60014997 T2 20050310; ES 2228321 T3 20050416; JP 2000282932 A 20001010; JP 4158272 B2 20081001
DOCDB simple family (application)
EP 00105642 A 20000316; DE 60014997 T 20000316; ES 00105642 T 20000316; JP 8382499 A 19990326