The U.S. Environmental Protection Agency has evaluated and reported on the effectiveness of fuel economy retrofit devices for many years. Originally, such products were marketed as emission improvers but with pressures of the oil embargo in the early 1970's most devices began to be promoted to benefit fuel economy. For the most part, such devices are not effective and do not measure up to the claims made by their advertisers. Of over ninety devices evaluated by EPA, only five have improved fuel economy without increasing emission levels. Four other devices modestly improved fuel economy but caused emissions to increase to the point that installation of the devices were determined by EPA to be tampering under the provisions of the Clean Air Act. In general, even those few devices that improved fuel economy were not cost effective.


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    Title :

    The Evaluation of Retrofit Devices for the Improvement of Fuel Economy and Emissions


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE International Congress and Exposition ; 1984



    Publication date :

    1984-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    The evaluation of retrofit devices for the improvement of fuel economy and emissions

    Korth,M.W. / White,J.T. / Stahman,R.C. et al. | Automotive engineering | 1984





    Emissions and fuel economy interaction

    Nicholson,R.C. / General Motors,US | Automotive engineering | 1978