We hypothesize that components designed to improve fuel economy by reducing power requirements should also result in a decrease in emissions of oxides of nitrogen (NOx). Fuel economy and NOx emissions of a pair of class 8 tractor-trailers were measured on a test track to evaluate the effects of single wide tires and trailer aerodynamic devices. Fuel economy was measured using a modified version of SAE test procedure J1321. NOx emissions were measured using a portable emissions monitoring system (PEMS). Fuel consumption was estimated by a carbon balance on PEMS output and correlated to fuel meter measurements. Tests were conducted using drive cycles simulating highway operations at 55 mph and 65 mph and suburban stop-and-go traffic. The tests showed a negative correlation (significant at p < 0.05) between fuel economy and NOx emissions. Single wide tires and trailer aerodynamic devices resulted in increased fuel economy and decreased NOx emissions relative to the baseline tests. Decreases in NOx emissions were disproportionately larger than increases in fuel economy; however, this effect may be an artifact of the particular engine being tested. These results demonstrate that emissions reductions can be achieved using strategies that decrease fuel use and save truck operators money.


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    Title :

    Effect of Single Wide Tires and Trailer Aerodynamics on Fuel Economy and NOx Emissions of Class 8 Line-Haul Tractor-Trailers


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    2005 SAE Commercial Vehicle Engineering Conference ; 2005



    Publication date :

    2005-11-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





    Effect of Single Wide Tires and Trailer Aerodynamics on Fuel Economy and NOx Emissions of Class 8 Line-Haul Tractor-Trailers

    Bachman, L.J. / Erb, A. / Bynum, C.L. et al. | British Library Conference Proceedings | 2005



    Improving the aerodynamics of long-haul freight tractor-trailers

    Evgrafov, A. N. / Vysotskii, M. S. | British Library Online Contents | 2002


    On the Aerodynamics of Tractor-Trailers

    Hammache, M. / Browand, F. / United Engineering Foundation (U.S.) | British Library Conference Proceedings | 2004