Patent ID: 8646253
Filing Date: 2014-02-11
Classification: F01N,Y02T

Abstract:
1. A method for controlling an exhaust gas purification system of a combustion engine, the method comprising: storing at least one exhaust gas component of an exhaust gas with at least one catalytic converter comprising an oxidization catalytic converter, the at least one catalytic converter connected to the combustion engine via an exhaust gas duct; introducing a defined amount of uncombusted hydrocarbons into the exhaust gas duct upstream of the at least one catalytic converter; determining, via a diagnostic unit, an absorption capability of uncombusted hydrocarbons within one of the at least one catalytic converter; utilizing the absorption capability to forecast, via the diagnostic unit, NO oxidization capability of the at least one catalytic converter; wherein determining the absorption capability comprises one or both of the steps: a) determining a temperature increase or an achieved temperature value during a burn-off of the introduced uncombusted hydrocarbons; b) detecting partially uncombusted hydrocarbons downstream of the at least one catalytic converter.