Modellbasierte Diagnose von NOx-Sensor-Fehlfunktion für ein System für selektive katalytische Reduktion

摘要

Methods and systems for detecting faults with nitrogen oxides sensors used to detect the presence of nitrogen oxides in an exhaust effluent gas stream emitted from a combustion engine during its operation include providing a virtual nitrogen oxides sensor measurement compared with actual nitrogen oxides content measured by nitrogen oxides sensors.