Verfahren und Vorrichtung zur Regelung eines in einem Abgaskanal einer Verbrennungskraftmaschine angeordneten NOx-Speicherkatalysators

摘要

The invention relates to a method for controlling a NO>X< storage catalyst by means of a NO>X<-sensitive measuring device, especially a NO>X< sensor, that is arranged downstream in relation to the NO>X< storage catalyst which is arranged in an exhaust gas channel of a combustion engine. According to the invention, a reference time (t>0<) is determined by means of a signal path of the NO>X<-sensitive measuring device (18) after the combustion engine (10) has been switched into a lean operating mode. Said reference time is used as the timely starting point for controlling processes being related to the NO>X< storage catalyst (16). The invention also relates to a device for carrying out the method. According to said device, means are provided by means of which the following procedure steps can be carried out: determining a reference time (t>0<) by means of a signal path (SV) of the NO>X<-sensitive measuring device (18) after regeneration of the NO>X< storage catalyst (16) and using the reference time (t>0<) as the timely starting point for controlling processes of the NO>X< storage catalyst (16).