EP 0877159 B1 20030625 - Process for checking the operability of the heater of a lambda sensor in the exhaust pipe of an internal combustion engine
Title (en)
Process for checking the operability of the heater of a lambda sensor in the exhaust pipe of an internal combustion engine
Title (de)
Verfahren zur Überprüfung der Funktionsfähigkeit der elektrischen Heizung einer Lambda-Sonde im Abgasrohr einer Brennkraftmaschine
Title (fr)
Procédé de comtrôle du fonctionnement du chauffage de la sonde lambda dans l'échappement d'un moteur à combustion
Publication
Application
Priority
DE 19719390 A 19970507
Abstract (en)
[origin: EP0877159A2] The method involves measuring the electrical resistance (RL) of the heater when the heating current (IH) has been switched off and a measurement current (IM) applied which is lower than the heating current. The electrical resistance of the heater is connected to a positive voltage to apply the heating or measurement current.
IPC 1-7
IPC 8 full level
F02D 41/14 (2006.01); F02D 41/22 (2006.01); G01N 27/26 (2006.01); G01N 27/409 (2006.01); G01R 27/02 (2006.01)
CPC (source: EP US)
F02D 41/1494 (2013.01 - EP US); F02D 41/1495 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES FR GB IT SE
DOCDB simple family (publication)
EP 0877159 A2 19981111; EP 0877159 A3 19991229; EP 0877159 B1 20030625; DE 19719390 A1 19981112; DE 59808786 D1 20030731; ES 2202676 T3 20040401; JP H1183790 A 19990326; US 5929328 A 19990727
DOCDB simple family (application)
EP 98106013 A 19980402; DE 19719390 A 19970507; DE 59808786 T 19980402; ES 98106013 T 19980402; JP 11926398 A 19980428; US 7391598 A 19980507