Patent ID: 8028519
Filing Date: 2011-10-04
Classification: B01D,F01N,F02D

Abstract:
1. An engine control unit, for regenerating an emission control system of a combustion engine with a storage catalyst, wherein the engine control unit is configured to: receive a first output signal from a first exhaust gas probe arranged before the storage catalyst; receive a second output signal from a second exhaust gas probe arranged after the storage catalyst; regenerate the storage catalyst by an admission flow with a reduction agent in a regeneration phase during an adjustment of a lambda set point; monitor an amount of the reduction agent during the regeneration phase of the storage catalyst, wherein the amount of reduction agent is acquired by the second output signal; and create a correction signal out of a difference of a lambda value equal to one and the second output signal of the second exhaust gas probe, wherein the correction signal is added to the lambda set point to create a corrected lambda set point.