This paper describes the application of a systems approach to address future passenger car diesel engine requirements. To meet future emissions targets, it is necessary to minimise engine out feedgas emissions and to ensure the best interaction between in-cylinder combustion and aftertreatment whilst providing competitive torque, power, refinement and driveability. To improve system operating ranges, a lean NOx aftertreatment system has been explored, consisting of an underfloor catalyst in series with a close coupled catalyst with controlled bypass. The aftertreatment system was configured to improve NOx conversion efficiencies through detailed understanding of feedgas/catalyst interactions. The use of in-cylinder post injection and other measures to improve feedgas constituents has been investigated. A detailed study of exhaust gas speciation as a function of both pilot and post in-cylinder injection timing and quantity is also summarised. A sophisticated optimisation process was utilised using design of experiments to determine the best control parameter settings for the combustion and aftertreatment system. The paper concludes with a system specification and calibration achieving in excess of 25 % aftertreatment conversion in drive cycle tests.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    A combined combustion and aftertreatment approach to achieve future emissions standards


    Weitere Titelangaben:

    Verfahren der kombinierten Verbrennung und Nachbehandlung zur Erfüllung künftiger Emissionsstandards


    Beteiligte:
    Ketcher, D. (Autor:in) / Cumming, B. (Autor:in) / Watts, M. (Autor:in)


    Erscheinungsdatum :

    2000


    Format / Umfang :

    14 Seiten, 12 Bilder, 2 Tabellen, 8 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    A combined combustion and aftertreatment approach to achieve future emissions standards

    Ketcher, D. / Cumming, B. / Watts, M. et al. | British Library Conference Proceedings | 2000


    Diesel combustion, emissions, and exhaust aftertreatment

    Society of Automotive Engineers / International Off Highway and Powerplant Congress and Exposition | TIBKAT | 1992


    Diesel engines: fuel injection, combustion, emissions, and exhaust aftertreatment

    Society of Automotive Engineers / International Off Highway and Powerplant Congress and Exposition | TIBKAT | 1994



    Ambient temperature light-off aftertreatment system for meeting ULEV emissions standards

    Lafyatis,D.S. / Ballinger,T.H. / Lammey,G. et al. | Kraftfahrwesen | 1998