Global Patent Index - EP 1036923 A2

EP 1036923 A2 2000-09-20 - Method of determining abnormality in high-pressure fuel injection device

Title (en)

Method of determining abnormality in high-pressure fuel injection device

Title (de)

Verfahren zur Feststellung von Abnormitäten in einer Hochdruckbrennstoffeinspritzvorrichtung

Title (fr)

Méthode de détermination des anormalités dans un système d'injection de combustible à haute pression


EP 1036923 A2 (EN)


EP 00104931 A


JP 7225899 A

Abstract (en)

The present invention provides a method of determining abnormality, which is capable of specifying a fuel force-feed system subject to an abnormality without causing fluctuations of a fuel pressure in an accumulator line. A fuel pump (30) is provided with a first supply pump (50a) and a second supply pump (50b), and these supply pumps (50a, 50b) alternately force-feed fuel to a common rail (20). Respective fuel injection valves (12) carry out fuel injection based on a fuel pressure (rail pressure) in the common rail (20). An ECU (60) detects a rail pressure rise amount during a fuel force-feed period and calculates an estimated value of rail pressure rise amount based on a force-feed command value for the fuel pump (30). The ECU (60) determines which one of the supply pumps (50a, 50b) is in the process of force-feeding fuel in a certain fuel force-feed period, and determines individually the occurrence of an abnormality in the respective supply pumps (50a, 50b) based on the detected value and the estimated value of rail pressure rise amount. <IMAGE>

IPC 1-7 (main, further and additional classification)

F02B 77/08

IPC 8 full level (invention and additional information)

F02D 45/00 (2006.01); F02D 41/22 (2006.01); F02D 41/38 (2006.01); F02D 41/40 (2006.01); F02M 63/02 (2006.01)

CPC (invention and additional information)

F02D 41/3809 (2013.01); F02D 41/221 (2013.01); F02M 59/08 (2013.01); F02M 63/0225 (2013.01); F02D 2041/224 (2013.01); F02D 2200/0604 (2013.01); F02M 59/102 (2013.01); F02M 63/027 (2013.01)

Designated contracting state (EPC)


DOCDB simple family

EP 1036923 A2 20000920; EP 1036923 A3 20010808; EP 1036923 B1 20030917; DE 60005235 D1 20031023; DE 60005235 T2 20040708; ES 2207434 T3 20040601; JP 2000265896 A 20000926