This interim report covers the results of the first year of exhaust emission tests on a group of 152 heavy-duty gasoline fueled 1970 and 1971 model year vehicles. Each of the trucks were tested at four month intervals using a chassis version of the heavy-duty gasoline nine-mode Federal Test Procedure. An additional group of ten truck engines were tested on both a stationary engine dynamometer as prescribed by the FTP and on a chassis dynamometer to determine the correlation between the 2 test methods. The first objective of the project, to determine the effectiveness of exhaust emission controls on new 1970 and 1971 trucks in actual operation, has been met. The results of the initial round of tests indicate that a majority of the trucks were within the 1970 Federal standards for HC emissions and that less than half were within the standards for CO emissions.


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    Title :

    Surveillance Study of Control Equipped Heavy-Duty Gasoline Powered Vehicles


    Contributors:

    Publication date :

    1972


    Size :

    340 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





    Emission Control for Gasoline-Powered Heavy-Duty Vehicles

    Griffith, F. D. | SAE Technical Papers | 1969


    Characteristics on Exhaust Emissions from Heavy Duty Gasoline Powered Vehicles

    Yoshisa,K. / Koike,N. / Tsukamoto,Y. et al. | Automotive engineering | 1975



    Emissions Control of Gasoline Engines for Heavy-Duty Vehicles

    Urban, Charles M. / McFadden, John J. / Springer, Karl J. | SAE Technical Papers | 1975