Regeneration of a NOx storage catalytic converter of an internal combustion engine

摘要

A method for NOx and/or SOx regeneration of an NOx-storage catalytic converter arranged in an exhaust treatment system of an internal combustion engine having more than one cylinder. A mass flux of reducing agents are increased in the exhaust treatment system. A control unit operates the more than one cylinder of the internal combustion engine so that the cylinders are selectively detuned. The control unit can operate a first part of the cylinders under a lean condition where lambda>1 and the control unit can operate a second set of the cylinders under a rich condition where lambda<1.