The effect of changing catalyst precious metal ratios and loadings on close coupled catalytic converter efficiencies has been studied. The three precious metals were platinum, palladium and rhodium. The specific matrix used for the development of response surface models is a central composite design and provides the capability of visually optimising the precious metal loadings. Catalysts were evaluated using perturbed scans. lightoff curves from the dynamometer aged, and vehicle emission tests. These scans show percent conversion efficiencies of the three legislated gases; HC, CO and NOx, over a range of Air Fuel Ratios (λ). Whilst lean and rich lightoff curves provide indications of conversion efficiencies at varying temperatures. Prior to testing the catalysts were aged, using an accelerated dynamometer ageing process, to 80K simulated kilometres. The catalysts were then fitted to a vehicle and chassis roll emission tests conducted.The purpose of the paper is to correlate the light off and perturb scan tests with vehicle emission tests. The possibility of testing remotely from a vehicle and achieving optimal solutions is commercially very attractive. Response surface methodology (RSM) provides a basis for the statistical design of experiment (DoE) evaluation models which were used to determine optimum precious metal loadings.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Optimisation of Precious Metal Loadings in Automotive Catalysts Using Response Surface Methodology


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Rutter, B. (Autor:in) / Eade, D. (Autor:in) / Collingwood, I. (Autor:in) / Kisenyi, J. (Autor:in) / Hurley, R. (Autor:in)

    Kongress:

    1996 SAE International Fall Fuels and Lubricants Meeting and Exhibition ; 1996



    Erscheinungsdatum :

    01.10.1996




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch





    Optimisation of Precious Metal Loadings in Automotive Catalysts Using Response Surface Methodology

    Rutter, B. / Hurley, R. / Eade, D. et al. | British Library Conference Proceedings | 1996


    Advanced three-way catalysts - optimisation by targeted zoning of precious metal

    Collins,N.R. / Cooper,J.A. / Morris,D. et al. | Kraftfahrwesen | 2005


    Advanced Three-Way Catalysts - Optimisation by Targeted Zoning of Precious Metal

    Ravenscroft, A. / Morris, D. / Cooper, J. A. et al. | SAE Technical Papers | 2005


    Three-way Catalyst Concepts with Optimized Low Precious Metal Loadings

    Engler, B. / Koberstein, E. / Lox, E. | SAE Technical Papers | 1990