Automotive exhaust emission testing according to legislated procedures and driving cycles is a routine process today in the United States, Europe and SE Asia. In practice, the selection of catalytic converters and the general design of exhaust aftertreatment systems are mainly aimed at the attainment of the legislated emissions limits with a reasonable safety margin. However, during the system optimization process, the catalyst and/or exhaust system manufacturer screens a large number of catalysts with a significant number of system design variations. In this process, certain levels of statistical uncertainty are present and must be seriously taken into account as stricter emissions standards are addressed and the safety margins become leaner. A methodology is developed and presented in this paper that is able to determine confidence levels in the attainment of specific emissions limits. This methodology combines results from experimental assessment of the distributions of engine-out emissions and catalyst activity by employing a previously developed and extensively validated model of a diesel oxidation catalyst. In this way, the emissions control system optimization is substantially aided and the required experimental effort is considerably reduced.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Statistical uncertainty in automotive emissions testing


    Beteiligte:


    Erscheinungsdatum :

    1999-05-01


    Format / Umfang :

    12 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Statistical uncertainty in automotive emissions testing

    Kandylas, I.P. | Online Contents | 1999


    Statistical uncertainty in automotive emissions testing

    Kandylas,I.P. / Stamatelos,A.M. / Dimitriadis,S.G. et al. | Kraftfahrwesen | 1999


    Improved Driving Cycle for Testing Automotive Exhaust Emissions

    Karstens, D. / Kuhler, M. | SAE Technical Papers | 1978


    Automotive emissions

    Hooper, F. C. | TIBKAT | 1973


    Improved Driving Cycle for Testing Automotive Exhaust Emissions

    Kuhler,M. / Karstens,D. / Volkswagenwerk | Kraftfahrwesen | 1978