Patent ID: 7971429

Claim:
A method of regenerating a particle filter and for the desulfurization of a NO x storage catalytic converter in an exhaust gas aftertreatment system of an internal combustion engine, the method comprising: raising a temperature of the particle filter in at least one mode of operation “DPF-heating”; heating up the NO x storage catalytic converter in at least a second mode of operation “NO x storage cat heating”; in a subsequent mode of operation, setting a Lambda value of λ<1 in an exhaust gas; and when a regeneration is requested for the particle filter or a desulfurization is requested for the NO x storage catalytic converter initializing a combined complete or partial regeneration of the particle filter as well as a desulfurization of the NO x storage catalytic converter; wherein after or during the mode of operation “DPF-heating”, switching the operation to the second mode of operation “NO x storage cat heating”, specifying a new set point temperature, and wherein during mode of operation “NO x storage cat heating”, setting a Lambda value of λ>1 in the exhaust gas.