Patent ID: 8291693
Filing Date: 2012-10-23
Classification: F01N,F02D

Abstract:
1. A method comprising setting a predetermined oxygen filling value of an oxygen storage reservoir of a catalytic converter for a motor vehicle; collecting raw emissions data during operation of the motor vehicle, wherein the exhaust gas data comprises information about pollutants in an exhaust gas stream of the motor vehicle, wherein the pollutants are components which are to be oxidized or reduced by the catalytic converter; differentiating the raw emissions data by pollutant to obtain pollutant-differentiated raw emissions data; determining a combustion air ratio based on the pollutant-differentiated raw emissions data converted to a change of the oxygen filling value of an oxygen storage reservoir of the catalytic converter as a function of a mass flow of exhaust gas, detecting an oxygen storage behavior and an oxygen discharge behavior of the catalytic converter; wherein oxygen entry into and oxygen discharge out of the oxygen storage reservoir of the catalytic converter are corrected based on resetting the predetermined oxygen filling value based on the combustion air ratio.