In 1986, Radian initiated development of an improved vehicle evaporative emissions model -- a model that expands upon the present EPA MOBILE4 to incorporate key factors affecting evaporative emissions rates. The 1988 annual report describes model improvements, including: the relationship between tank temperature and ambient temperature; a user interface to allow the input of user-selected multiple driving patterns; improved estimates of controlled and uncontrolled diurnal emissions for 1981+ vehicles and older model year vehicles; inclusion of additional to update diurnal and hot-soak emission factors; and to update the effect of fuel tank level on hot-soak and diurnal emissions; investigation of the relationships between driving behavior and fuel tank temperature.


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    Title :

    CRC-Radian Evaporative Emissions Model: EVAP 2.0 Annual Report, 1988


    Contributors:
    S. Kishan (author) / T. H. DeFries (author) / R. Klausmeier (author)

    Publication date :

    1989


    Size :

    268 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English