A Study of Three-Way Catalyst Deterioration Monitoring

摘要

To meet the demand for Euro 6 regulations, a three-way catalyst (TWC) oxygen storage model and diagnosis algorithm are designed to detect the TWC deterioration. Oscillations are produced based on oxygen storage measurement, and then catalyst performance is evaluated based on catalyst oxygen storage states which are obtained by analyzing rear lambda signal. The algorithm is verified on the bench and the vehicle, and can meet the catalyst monitoring requirements of the EU 6 regulations.