EP 3619412 A2 20200311 - METHOD FOR FILTERING AN AIR-FUEL RATIO SIGNAL PRODUCED BY AN ENGINE EXHAUST SENSOR
Title (en)
METHOD FOR FILTERING AN AIR-FUEL RATIO SIGNAL PRODUCED BY AN ENGINE EXHAUST SENSOR
Title (de)
VERFAHREN ZUR FILTRIERUNG EINES DURCH EINEN MOTORABGASSENSOR ERZEUGTEN SIGNALS DES LUFT-BRENNSTOFF-VERHÄLTNISSES
Title (fr)
PROCEDE DE FILTRAGE D'UN SIGNAL DE RICHESSE ISSU D'UNE SONDE À L'ÉCHAPPEMENT D'UN MOTEUR
Publication
Application
Priority
- FR 1753906 A 20170503
- FR 2018051016 W 20180424
Abstract (en)
[origin: WO2018202975A2] The invention relates to a method for filtering and correcting the richness signal (Upstream sensor meas) measured by a sensor under at least one engine operating condition creating oscillations in the measured richness (Upstream sensor meas) and a modification to a sensor model, said sensor being referred to as the upstream sensor. The operating condition is identified during earlier tests on the engine relative to the adjustment of the pre-determined richness set value (Sensor rich set value) for the engine, with a value of an engine operating parameter indicating that the condition is in effect being saved. As soon as said at least one value is detected at a given moment in the operation of the engine, a first nominal filtering is suspended and replaced by a second filtering of the measured richness (Upstream sensor meas). A correction is then made to at least one parameter (ttrans, treps) of the sensor.
IPC 8 full level
F02D 41/14 (2006.01); F02D 41/24 (2006.01)
CPC (source: EP)
F02D 41/1401 (2013.01); F02D 41/1439 (2013.01); F02D 41/1456 (2013.01); F02D 41/1486 (2013.01); F02D 41/1441 (2013.01); F02D 41/1454 (2013.01); F02D 41/2432 (2013.01); F02D 2041/1431 (2013.01); F02D 2041/1432 (2013.01); F02D 2041/1433 (2013.01); F02D 2200/0411 (2013.01); F02D 2200/101 (2013.01)
Citation (search report)
See references of WO 2018202975A2
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)
WO 2018202975 A2 20181108; WO 2018202975 A3 20190103; CN 110582628 A 20191217; CN 110582628 B 20220325; EP 3619412 A2 20200311; EP 3619412 B1 20210113; FR 3065992 A1 20181109
DOCDB simple family (application)
FR 2018051016 W 20180424; CN 201880029724 A 20180424; EP 18724960 A 20180424; FR 1753906 A 20170503