Patent ID: 9593617
Date: 2017-03-14
CPC Classifications: F01N,F02D,F02M,Y02A,Y02T

Claim:
1. A method for diagnosing an exhaust-gas catalytic converter configured to catalytically convert at least one exhaust-gas component, the catalytic converter being arranged in an exhaust-gas system of an internal combustion engine having an engine control unit and an exhaust-gas recirculation system configured to withdraw a partial stream of exhaust gas downstream from the exhaust-gas catalytic converter and to feed the partial stream into combustion air of the internal combustion engine, said engine control unit configured to implement the method, the method comprising: determining a momentary raw emission (NO measuring a momentary concentration of the exhaust-gas component (NO determining a diagnostic value of the exhaust-gas catalytic converter in terms of the conversion of the exhaust-gas component as a function of a modeled raw emission (NO