The automotive catalytic converters, which are employed to reduce engine exhaust emissions, operate in transient conditions under all modes of operation. The fluctuation in air-fuel ratio is a major contributor to these transients. The consideration of these transients is essential in accurate modeling of catalyst operation during actual driving conditions. In this work, a numerical investigation is carried out to comprehend the dynamic response of three-way catalytic converters subjected to changes in air-fuel ratio. The mathematical model considers the coupling effect of heat and mass transfer with the catalyst reactions as exhaust gases flow through the catalyst. The converter dynamic response is studied by considering a converter operating under steady conditions, which is suddenly subjected to air-fuel ratio variations. Two types of imposed fluctuations (sinusoidal and step changes) are considered. The catalyst response is predicted by using a simplified 4-step chemical mechanism. The paper elucidates the effect of air-fuel modulations on the catalyst HC, CO, and NO conversion efficiencies.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Prediction of the dynamic response of automotive catalytic converters with the simplified chemical kinetics


    Beteiligte:
    Shamin, T. (Autor:in) / Medisetty, V.C. (Autor:in)


    Erscheinungsdatum :

    2001


    Format / Umfang :

    13 Seiten, 22 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Simplified reaction modelling of automotive catalytic converters

    Weilenmann,T. / Tsinoglou,D. / Stilli,J. et al. | Kraftfahrwesen | 2010


    Simplified Reaction Modeling of Automotive Catalytic Converters

    Weilenmann, M. / Tsinoglou, D. / Stilli, J. et al. | British Library Conference Proceedings | 2010



    Analysis of transient thermal response of automotive catalytic converters

    Bella, G. / Cordiner, S. / Feola, M. et al. | Tema Archiv | 1994


    Contribution of Automotive Catalytic Converters

    Searles, R. / Deutsche Gesellschaft fur Materialkunde | British Library Conference Proceedings | 2002