Method for evaluating a catalyst system consisting of at least two catalysts for a motor vehicle and associated measuring and diagnostic device

摘要

Method for evaluating a catalytic converter system for a motor vehicle (6) consisting of at least two catalytic converters (9, 10), characterized in that the catalytic converter system is evaluated by at least one catalyst deterioration (9, 10) being carried out separately for each catalytic converter (9, 10). 10) is determined in relation to a corresponding new catalyst and used as part of the evaluation as a separate evaluation criterion, wherein at least one deterioration factor in dependence on a determination of the valence of different regions of the catalyst (9, 10) is determined by the in the Weighting of oxygen storage available to different areas along the axial length of the catalytic converter (9, 10) with a weighting dependent on the axial position, the weighting being determined during a cold start in a change in the raw emissions of the engine (8) detected in a further diagnostic procedure and / or od it is adjusted for a change in the raw emissions of the engine (8) due to the use of a different type of fuel.