EP 0781912 B1 20021030 - Apparatus for determining malfunctioning of fuel injection control system
Title (en)
Apparatus for determining malfunctioning of fuel injection control system
Title (de)
Fehlerüberwachungsvorrichtung für ein Brennstoffeinspritzsteuerungssystem
Title (fr)
Dispositif pour identifier le malfonctionnement d'un système de commande d'injection de carburant
Publication
Application
Priority
JP 33734895 A 19951225
Abstract (en)
[origin: EP0781912A2] A system for detecting malfunctions in an apparatus for controlling a fuel injection mechanism of a diesel engine (2) provided with a plurality of cylinders (C) is disclosed. Each cylinder (C) accommodates a piston (42) for producing rotation of a crankshaft (40) and a nozzle (4) for performing fuel injection during each reciprocation cycle of the piston (42). Injection amount of the fuel is altered based on a compensation value computed for each cylinder (C) so as to minimize a value indicating cyclic rotating speed fluctuation of the crankshaft (40) produced by each cylinder (C). The system is characterized by memory means for storing an initial data indicative of the compensation value of each cylinder (C) computed during an initial injection stage of each nozzle (4), comparing means for comparing a malfunction judgement value with a magnitude obtained by computing the difference or ratio between an actual compensation value and the initial data, and determining means for determining the malfunctioning of the apparatus when the computed magnitude exceeds the predetermined range. <IMAGE>
IPC 1-7
IPC 8 full level
F02D 41/14 (2006.01); F02D 41/22 (2006.01); F02D 41/40 (2006.01); F02D 45/00 (2006.01); F02B 3/06 (2006.01); F02D 13/02 (2006.01)
CPC (source: EP)
F02D 41/1498 (2013.01); F02D 41/221 (2013.01); F02D 41/2451 (2013.01); F02B 3/06 (2013.01); F02D 2013/0292 (2013.01); F02D 2200/1015 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0781912 A2 19970702; EP 0781912 A3 19990602; EP 0781912 B1 20021030; DE 69624549 D1 20021205; DE 69624549 T2 20030618; JP H09177587 A 19970708
DOCDB simple family (application)
EP 96120868 A 19961224; DE 69624549 T 19961224; JP 33734895 A 19951225