EP 3853451 A1 20210728 - DYNAMIC DETECTION OF AMMONIA EXCESS BY MEANS OF A SOFTWARE ALGORITHM IN ORDER TO ELIMINATE THE AMMONIA SENSOR
Title (en)
DYNAMIC DETECTION OF AMMONIA EXCESS BY MEANS OF A SOFTWARE ALGORITHM IN ORDER TO ELIMINATE THE AMMONIA SENSOR
Title (de)
DYNAMISCHE AMMONIAK-ÜBERSCHUSS DETEKTION MITTELS EINES SOFTWARE-ALGORITHMUS ZUR ELIMINIERUNG DES AMMONIAK-SENSORS
Title (fr)
DÉTECTION DYNAMIQUE D'EXCÈS D'AMMONIAQUE À L'AIDE D'UN ALGORITHME LOGICIEL POUR ÉLIMINER LE CAPTEUR D'AMMONIAQUE
Publication
Application
Priority
- DE 102018007421 A 20180920
- EP 2019000242 W 20190816
Abstract (en)
[origin: WO2020057768A1] The invention relates to an internal combustion engine having an exhaust gas aftertreatment system, the exhaust gas aftertreatment system comprising the following in the given order in the flow direction of the exhaust gas: a device for metering ammonia and/or a compound that can be decomposed to form ammonia into the exhaust gas to be cleaned, as a reducing agent; one or more SCR catalysts, which form a first SCR unit; one or more SCR catalysts and/or at least one ammonia oxidation catalyst and/or at least one ammonia slip catalyst (ASC), which form a second SCR unit; and a nitrogen oxide sensor (NOx sensor) for determining the concentration of the nitrogen oxides (NOx) in the exhaust gas tail pipe, wherein the amount, to be metered into the exhaust gas, of ammonia and/or of a compound that can be decomposed to form ammonia is set using the nitrogen oxide concentration in the exhaust gas tail pipe that is determined by means of the NOx sensor, characterized in that the occurrence or non-occurrence of an ammonia excess in the region of the NOx sensor can be determined from the sensor signal of the NOx sensor by evaluating said sensor signal.
IPC 8 full level
F01N 3/20 (2006.01); F01N 13/00 (2010.01)
CPC (source: EP KR US)
F01N 3/2066 (2013.01 - EP); F01N 3/208 (2013.01 - EP KR US); F01N 13/009 (2014.06 - EP KR US); F01N 3/105 (2013.01 - US); F01N 13/008 (2013.01 - US); F01N 2560/021 (2013.01 - EP KR); F01N 2560/026 (2013.01 - EP KR US); F01N 2570/18 (2013.01 - EP KR); F01N 2610/02 (2013.01 - EP KR US); F01N 2610/1453 (2013.01 - US); F01N 2900/1616 (2013.01 - US); Y02A 50/20 (2018.01 - EP); Y02T 10/12 (2013.01 - EP KR)
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 102018007421 A1 20200326; DE 102018007421 B4 20210701; CN 112689703 A 20210420; CN 112689703 B 20221129; EP 3853451 A1 20210728; JP 2022500583 A 20220104; JP 7432291 B2 20240216; KR 20210058843 A 20210524; US 11434802 B2 20220906; US 2022056830 A1 20220224; WO 2020057768 A1 20200326
DOCDB simple family (application)
DE 102018007421 A 20180920; CN 201980058789 A 20190816; EP 19759291 A 20190816; EP 2019000242 W 20190816; JP 2021504803 A 20190816; KR 20217007934 A 20190816; US 201917275964 A 20190816