EP 0812983 B1 20020130 - A malfunction determining apparatus of an exhaust gas recirculation system
Title (en)
A malfunction determining apparatus of an exhaust gas recirculation system
Title (de)
Vorrichtung zur Detektion einer Fehlfunktion eines Abgasrückführungssystems
Title (fr)
Dispositif pour détecter un fonctionnement défectueux d'un système de récirculation de gaz d'échappement
Publication
Application
Priority
JP 15130396 A 19960612
Abstract (en)
[origin: EP0812983A2] A malfunction determining apparatus of an exhaust gas recirculation system (1) performs an accurate determination of malfunctioning of an EGR valve (4) based on an amount of change in the actual degree of opening of the EGR valve (4). The EGR valve (4) is provided between an exhaust passage (10) and an intake passage (9) of an internal combustion engine (2) of a vehicle. An actual valve opening degree detector detects an actual valve opening degree (ELIFTD) of the EGR valve (4). A target valve opening degree calculator calculates a target valve opening degree (ETLIFTD) of the EGR valve (4). A malfunction determining part calculates an amount of change (ELIFTD-ELIFTD1) in the actual valve opening degree (ELIFTD) when an amount of change (ETLIFTD-ETLIFTD1) in the target valve opening degree is equal to or greater than a predetermined value ( alpha ) so as to determine an occurrence of malfunction in the exhaust gas recirculation system (1) based on a comparison between the amount of change (ELIFTD-ELIFTD1) in the actual valve opening degree (ELIFTD) and a second predetermined value ( beta ). <IMAGE>
IPC 1-7
IPC 8 full level
F02M 25/07 (2006.01)
CPC (source: EP)
F02M 26/49 (2016.02); F02M 26/57 (2016.02); F02M 26/47 (2016.02); F02M 26/48 (2016.02)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0812983 A2 19971217; EP 0812983 A3 19980701; EP 0812983 B1 20020130; DE 69710127 D1 20020314; DE 69710127 T2 20020627; JP 2845198 B2 19990113; JP H09329062 A 19971222
DOCDB simple family (application)
EP 97108755 A 19970602; DE 69710127 T 19970602; JP 15130396 A 19960612