A process for the desulphurization arranged in an exhaust gas duct of an internal combustion engine, no φ × φ - storage catalytic converter

摘要

The present invention relates to a process for the desulphurization of a arranged in an exhaust gas duct of an internal combustion engine, no φ × φ - storage catalytic converter, wherein the internal combustion engine for the desulfurization, alternately in a lean operating mode, with the lambda value 1 and a rich operating mode is operated with a lambda value 1. Dollars a it is provided that the progress of the desulfurization on the basis of a characteristic of a size of intervals (i φ n φ) is monitored during the desulfurization, wherein the interval (i φ n φ) from the beginning of a n -, which is of a rich operating phase (t f φ, φ φ n φ) up to a drop below a predefinable lambda threshold value (s φ f φ) downstream of the no φ × φ - storage catalytic converter (16) takes. Dollars a furthermore, there is provided that the progress of the desulfurization using a curve of the lambda sensor voltage (u φ n φ) downstream of the no φ × φ - storage catalytic converter (16), which, according to a predetermined interval after the beginning of the n -, which is of a rich operating phase (t f φ, φ φ n φ) is determined, is monitored.