Patent ID: 7162866
Filing Date: 2007-01-16
Classification: F01N,Y02A

Abstract:
1. A method for operating an internal combustion engine of a motor vehicle, the engine being operatively connected to an adsorption catalyst for treating an exhaust-gas stream, comprising: loading the adsorption catalyst with nitrogen oxides in the exhaust-gas stream; unloading the adsorption catalyst, wherein the exhaust-gas stream through the adsorption catalyst is decreased during the unloading, and wherein a fuel/air mixture is added to the exhaust-gas stream upstream from the adsorption catalyst during the unloading; and switching over from the unloading to the loading of the adsorption catalyst, wherein the addition of the fuel/air mixture to the exhaust-gas stream is initially ended at the beginning of the switching over, wherein the decreasing of the exhaust-gas stream is ended following a predefined flushing time after the ending of the addition of the fuel/air mixture, and wherein the flushing time is predefined such that the unloading of the adsorption catalyst by the decreased exhaust-gas stream continues during the flushing time as long as the exhaust-gas stream continues to carry the fuel/air mixture.