EP 2449237 A1 20120509 - METHOD AND DIAGNOSTIC DEVICE FOR DIAGNOSING A HEATABLE EXHAUST GAS PROBE OF AN INTERNAL COMBUSTION ENGINE
Title (en)
METHOD AND DIAGNOSTIC DEVICE FOR DIAGNOSING A HEATABLE EXHAUST GAS PROBE OF AN INTERNAL COMBUSTION ENGINE
Title (de)
VERFAHREN UND DIAGNOSEVORRICHTUNG ZUR DIAGNOSE EINER BEHEIZBAREN ABGASSONDE EINER BRENNKRAFTMASCHINE
Title (fr)
PROCÉDÉ ET DISPOSITIF DE DIAGNOSTIC PERMETTANT LE DIAGNOSTIC D'UNE SONDE DE GAZ D ÉCHAPPEMENT CHAUFFANTE D'UN MOTEUR À COMBUSTION INTERNE
Publication
Application
Priority
- EP 2010059251 W 20100630
- DE 102009027378 A 20090701
Abstract (en)
[origin: WO2011000853A1] The invention relates to a method (71) for diagnosing a heatable exhaust gas probe (11) of an internal combustion engine, wherein a predetermined temporally varying or constant voltage (U1, U2) or a predetermined temporally varying or constant current (I1, I2) is generated by means of a voltage source (41, 51), the voltage (U1, U2) or the current (I1, I2) is applied to terminals (APE, RT, I PN, RE, ALE, I PE, 37) of the exhaust gas probe (11), a current (I1, I2) that flows through the voltage source or a voltage (U1, U2) that is applied to the voltage source when a voltage (U1, U2) or a current (I1, I2) is applied is detected, and the current (I1, I2) or the voltage (U1, U2) is evaluated for diagnosing the exhaust gas probe (11). In order to provide a method (71) for diagnosing the exhaust gas probe (71), which allows a reliable and accurate diagnosis of the exhaust gas probe (71) and permits information to be derived about the type of error potentially present in the exhaust gas probe (71), according to the invention the method (71) is carried out independently of an open and/or closed loop control unit of the internal combustion engine, wherein an operating temperature of the exhaust gas probe (71) is adjusted to a predetermined temperature value by way of a control element (59) that is separate from the open and/or closed loop control unit.
IPC 8 full level
F02D 41/14 (2006.01); F02D 41/26 (2006.01)
CPC (source: EP KR US)
F02D 41/1494 (2013.01 - KR); F02D 41/1495 (2013.01 - EP KR US); F02D 41/266 (2013.01 - KR); G01N 27/4175 (2013.01 - EP KR US); F02D 41/1494 (2013.01 - EP US); F02D 41/266 (2013.01 - EP US)
Citation (search report)
See references of WO 2011000853A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
DE 102009027378 A1 20110105; CN 102472185 A 20120523; CN 102472185 B 20160106; EP 2449237 A1 20120509; JP 2012531603 A 20121210; JP 5620483 B2 20141105; KR 20120102497 A 20120918; US 2012167656 A1 20120705; US 9062623 B2 20150623; WO 2011000853 A1 20110106
DOCDB simple family (application)
DE 102009027378 A 20090701; CN 201080029983 A 20100630; EP 10726131 A 20100630; EP 2010059251 W 20100630; JP 2012518081 A 20100630; KR 20117031604 A 20100630; US 201013381437 A 20100630