EP 2850304 A1 20150325 - METHOD AND CONTROL UNIT FOR COMPENSATING A VOLTAGE OFFSET IN A TWO-POINT LAMBDA PROBE
Title (en)
METHOD AND CONTROL UNIT FOR COMPENSATING A VOLTAGE OFFSET IN A TWO-POINT LAMBDA PROBE
Title (de)
VERFAHREN UND STEUEREINHEIT ZUR KOMPENSATION EINES SPANNUNGSOFFSETS EINER ZWEIPUNKT-LAMBDASONDE
Title (fr)
PROCÉDÉ ET UNITÉ DE COMMANDE POUR LA COMPENSATION D'UN ÉCART DE TENSION D'UNE SONDE LAMBDA À DEUX POINTS
Publication
Application
Priority
- DE 102012208092 A 20120515
- EP 2013057954 W 20130417
Abstract (en)
[origin: WO2013171015A1] The invention relates to a method for compensating a voltage offset in a voltage-lambda characteristic of a two-point lambda probe in relation to a reference-voltage-lambda characteristic of the two-point lambda probe, the two-point lambda probe being arranged in an exhaust conduit of an internal combustion engine. For an output voltage of the two-point lambda probe, the increase in the voltage-lambda characteristic is determined and compared to the increase in the reference-voltage-lambda characteristic at the same output voltage, and the voltage offset is determined from a deviation between the determined increase in the voltage-lambda characteristic and the increase in the reference-voltage-lambda characteristic. The invention further relates to a control unit for performing the method. The method and the control unit enable a voltage offset in a two-point lambda probe caused by ageing or manufacturing tolerance to be determined and compensated for.
IPC 8 full level
F02D 41/14 (2006.01); F02D 41/12 (2006.01); F02D 41/24 (2006.01); G01N 33/00 (2006.01)
CPC (source: EP US)
F02D 41/1454 (2013.01 - EP US); F02D 41/2474 (2013.01 - EP US); G01M 15/104 (2013.01 - US); G01N 33/0006 (2013.01 - EP US); G01N 33/0073 (2013.01 - EP US); G01R 19/165 (2013.01 - US); F02D 41/123 (2013.01 - EP US); F02D 41/2454 (2013.01 - EP US)
Citation (search report)
See references of WO 2013171015A1
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 RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DE 102012208092 A1 20131121; DE 102012208092 B4 20220224; CN 104271927 A 20150107; CN 104271927 B 20170908; EP 2850304 A1 20150325; JP 2015517618 A 20150622; JP 6025970 B2 20161116; US 2015135802 A1 20150521; US 9696289 B2 20170704; WO 2013171015 A1 20131121
DOCDB simple family (application)
DE 102012208092 A 20120515; CN 201380025319 A 20130417; EP 13717488 A 20130417; EP 2013057954 W 20130417; JP 2015510707 A 20130417; US 201314401483 A 20130417