Method for determining the reducing agent concentration (NH3) in the exhaust gas stream of a combustion engine

Method for determining the reducing agent concentration (NH3) in the exhaust gas stream of a combustion engine

Process for determining the reductant (ammonia) concentration in the exhaust gas stream of an internal combustion (I. C.) engine comprises initially correcting the crude measured value obtained by a gas sensor using an offset value to produce an intermediate value; and changing the intermediate valu...

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Bibliographische Detailangaben
Hauptverfasser: SMUK, MIRKO, IRION, ECKARD, LEYE, HOLGER, KNEZEVIC, ALEKSANDAR
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Beschreibung
Zusammenfassung:Process for determining the reductant (ammonia) concentration in the exhaust gas stream of an internal combustion (I. C.) engine comprises initially correcting the crude measured value obtained by a gas sensor using an offset value to produce an intermediate value; and changing the intermediate value to a corrected ammonia measured value using the NOx concentration of the exhaust gas. Preferred Features: The NOx and ammonia concentrations are tabulated in a two dimensional table.