EP 0946868 B1 20040211 - METHOD FOR ELECTRIC DIAGNOSIS OF AN INTERNAL COMBUSTION ENGINE OXYGEN SENSOR
Title (en)
METHOD FOR ELECTRIC DIAGNOSIS OF AN INTERNAL COMBUSTION ENGINE OXYGEN SENSOR
Title (de)
METHODE ZUR ELEKTRISCHEN DIAGNOSE EINES SAUERSTOFFSENSORS EINES VERBRENNUNGSMOTORS
Title (fr)
PROCEDE DE DIAGNOSTIC ELECTRIQUE D'UNE SONDE A OXYGENE D'UN MOTEUR A COMBUSTION INTERNE
Publication
Application
Priority
- FR 9702284 W 19971212
- FR 9615724 A 19961220
Abstract (en)
[origin: FR2757634A1] The invention concerns a method for electric diagnosis of an oxygen sensor of an internal combustion engine functioning on several richness values and in particular on a lean burn, characterised in that it consists in the following steps: monitoring the functioning of the engine and when predetermined functioning conditions are observed in which the richness of the carburetted mixture remains different from the stoichiometry for a sufficient time interval, measuring the voltage level of the signal emitted by said oxygen sensor; comparing this voltage value to a polarisation value and deducing therefrom if said voltage value is substantially equal to the polarisation voltage the existence of a fault in the electric connection of the sensor, or otherwise the absence of fault in the sensor electric connection.
IPC 1-7
IPC 8 full level
F02D 41/14 (2006.01)
CPC (source: EP)
F02D 41/1476 (2013.01); F02D 41/1495 (2013.01)
Designated contracting state (EPC)
DE ES GB IT
DOCDB simple family (publication)
FR 2757634 A1 19980626; FR 2757634 B1 19990122; AU 5489198 A 19980717; DE 69727588 D1 20040318; DE 69727588 T2 20041216; EP 0946868 A1 19991006; EP 0946868 B1 20040211; ES 2213842 T3 20040901; WO 9828615 A1 19980702
DOCDB simple family (application)
FR 9615724 A 19961220; AU 5489198 A 19971212; DE 69727588 T 19971212; EP 97951321 A 19971212; ES 97951321 T 19971212; FR 9702284 W 19971212