In this study, real-world evaporative emissions testing was performed on 50 late-model vehicles (30 passenger cars and 20 light-duty trucks) ranging in age from 1992 to 1997 model year. Six of the 50 vehicles were equipped with enhanced evaporative emission control systems; 49 were procured from an Arizona State Inpsection and Maintenance (I/M) Program test lane located in Mesa, Arizona; one vehicle was procured from an employee of the test facility. Hot soak, running loss, and real-time diurnal testing was performed using tank fuel that averaged 6.5 RVP. Hot soak and running loss testing was performed at above 95 deg F and one- and three-day diurnal testing was done using heat builds of 72-96 deg F. The data collected indicate that the small percentage of the vehicle fleet with evaporative emission control system defects contributes disproportionately to the total evaporative emissions of the fleet.


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    Titel :

    Real World Evaporative Testing of Late-Model In-Use Vehicles. Evaporative Emissions from Late-Model In-Use Vehicles


    Beteiligte:
    D. McClement (Autor:in) / B. Hall (Autor:in) / M. Strunck (Autor:in) / J. Lyons (Autor:in)

    Erscheinungsdatum :

    1999


    Format / Umfang :

    114 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




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