Verfahren zum Betreiben eines Dreiwegekatalysators einer Brennkraftmaschine

摘要

The invention relates to an internal combustion engine (1), especially for a motor vehicle, that is provided with a three-way catalyst (12) that can be impinged upon with nitrogen oxides. The control device (18) is used to switch from a rich-mixture operation to a lean-mixture operation of the internal combustion engine (1). The control device (18) allows an extrapolation from the NOx emissions to the aging of the three-way catalyst (12).