This report presents exhaust emission and fuel economy measurements for one heavy-duty gasoline fueled vehicle operated over various driving cycles. These driving cycles were developed from actual in-use operational data collected in New York and Los Angeles under the CAPE-21 program. In each location, both freeway and non-freeway operational parameters were recorded. A data matrix (relating speed, acceleration and frequency of occurrance) was prepared for each city and class of operation. Several different cycles were generated for each matrix. Evaluation of the concept of chassis testing for heavy-duty vehicles were the major purpose of this project. The test program was designed to measure the sensitivity of exhaust emissions and fuel economy to the various driving cycles and road load conditions. In addition, a brief attempt was made to characterize cold start emissions and the effects of increased vehicle frontal area. Three of the fully transient cycles were 'linearized' (steady state cruises and constant accelerations) to see if a simpler type of transient operation could accurately predict fuel economy. Finally, experiments were undertaken to measure the instantaneous exhaust dilution ration in order to assess the adequacy of the CVS flow rate.


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    Titel :

    Exhaust Emissions and Fuel Consumption of a Heavy-Duty Gasoline Powered Vehicle Over Various Driving Cycles - 427 Cubic Inch 1977 California GMC 6500


    Beteiligte:
    R. Nash (Autor:in)

    Erscheinungsdatum :

    1978


    Format / Umfang :

    42 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch