Abstract: The present invention provides a method for monitoring effectiveness of a three-way catalytic converter of a gasoline engine. The method includes detecting emissions of the gasoline engine by an NOX sensor arranged within the three-way catalytic converter or downstream of the three-way catalytic converter in an exhaust-gas flow direction and transmitting values measured by the NOX sensor together with operating variables of the gasoline engine and/or of the three-way catalytic converter to a processor. The processor is configured to execute a simulation model and thereby calculate emissions values of a reference catalytic converter on the basis of the operating variables. The method further includes comparing the calculated emissions values with the values measured by the NOX sensor.

Abstract: The present invention provides a method for monitoring effectiveness of a three-way catalytic converter of a gasoline engine. The method includes detecting emissions of the gasoline engine by an NOX sensor arranged within the three-way catalytic converter or downstream of the three-way catalytic converter in an exhaust-gas flow direction and transmitting values measured by the NOX sensor together with operating variables of the gasoline engine and/or of the three-way catalytic converter to a processor. The processor is configured to execute a simulation model and thereby calculate emissions values of a reference catalytic converter on the basis of the operating variables. The method further includes comparing the calculated emissions values with the values measured by the NOX sensor.