An improved method of deriving total emissions for gaseous pollutants from gasoline motor vehicles in the UK is described. The bases of the new methodology are performance-related emission factors, derived from measurements made during actual journeys on urban, cross-country and motorway routes, combined with vehicle speed distributions and national traffic activity statistics which give the total annual distance travelled, classified according to type of vehicle and class of road. The uncertainties associated with each stage of the calculation are identified and evaluated as far as possible. The performance-related emissions are compared with total emissions, using fuel-related emission factors combined with national fuel consumption data. The results are complemented with descriptions of vehicle emission legislation, of the diesel total emissions and of the significance of changes in instrumentation for measuring hydrocarbon emissions.


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    Title :

    Revised Calculation of Gaseous Emissions from UK Motor Vehicles


    Contributors:

    Publication date :

    1985


    Size :

    43 pages



    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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