Global patent index - EP 1039117 A2

EP 1039117 A2 2000-09-27 - 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

EP 1039117 A2 (EN)

Application

EP 00105642 A

Priority

JP 8382499 A

Abstract (en)

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 (main, further and additional classification)

F02D 41/22; F02D 41/38

IPC 8 full level (invention and additional information)

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 (invention and additional information)

F02D 41/22 (2013.01); F02D 41/3809 (2013.01); F02D 2041/224 (2013.01); F02D 2200/0604 (2013.01)

Citation (applicant)

JP H10238392 A 19980908 - TOYOTA MOTOR CORP

Designated contracting state (EPC)

DE ES FR GB IT

EPO simple patent family

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

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