In the exhaust air gas aisle of the internal combustion engine distribution facilities to be done in manner for controlling the desulfurization of the NOX storage catalytic converter which distribution

摘要

(57) Abstract This invention distribution facilities being done in downstream of the NO _X storage catalyst, depending on the NO _X density in the exhaust and using 1 where you send the signal NO _X sondes at least, it regards the method and the device in order to control the desulfurization of the NO _X storage catalyst which distribution facilities is done in the exhaust passage of the internal combustion engine. At least one which is suitable to the desulfurization effect where it decides the NO _X activity (NOA) of the NO _X storage catalyst (18) from the NO _X density which was measured with downstream of the NO _X storage catalyst (18), when being less than the specified threshold (SW) of NO _X activity (NOA) of the NO _X storage catalyst (18), it starts desulfurization with specified desulfurization parameter, it decides the irreversible deterioration of the NO _X storage catalyst (18) on the basis of desulfurization record, when exceeding specified deterioration limiting value (SW _IR), starts power desulfurization, in that case is highDesulfurization parameter is selected, depends on the height of the NO _X initial activity (NOAMX) which recovers after that driving the internal combustion engine 10, after the power desulfurization.