Six laboratories capable of chassis-testing heavy-duty vehicles participated in a crosscheck program designed to compare emissions results from a Ford L-9000. The single-axle vehicle was shipped to each laboratory and tested through a series of UDDS and steady-state cycles. The resulting data were compared statistically using reproducibility and repeatability analyses. Although one lab produced some results that significantly differed from the other five, the remaining labs produced comparable results. TPM, CO and THC were the most variable while NOX and CO2 were most stable. Lab differences included atmospheric and environmental conditions, road-load curve application and drivers. Comparison of steady state and transient tests suggest that driver variability is not a major factor.


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    Titel :

    Interlaboratory Cross-Check of Heavy-Duty Vehicle Chassis Dynamometers


    Weitere Titelangaben:

    Sae Technical Papers



    Kongress:

    SAE Powertrain & Fluid Systems Conference & Exhibition ; 2002



    Erscheinungsdatum :

    21.10.2002




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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