The effect of the gasoline antiknock additive, MMT, on automotive emission control systems was studied in a 63-car field test. The cars were operated for 50 000 miles, and the effects of MMT on hydrocarbon, CO and NOx emissions, catalyst plugging and spark plug life were determined.Two concentration levels of MMT in a clear base fuel were studied, 1/32 g Mn/gal and 1/16 g Mn/gal. Seven 1977-78 model year cars, all calibrated to meet California standards, were included in the statistical design.The results of this study indicate that the use of MMT at either test concentration increases both engine and tailpipe hydrocarbon emissions, compared to clear fuel. At 50K miles, the average tailpipe hydrocarbon increase was 0.09 g/mile for 1/32 MMT fuel, and 0.11 g/mile for 1/16 MMT fuel. This increase was pronounced at low mileage intervals, and significant differences continued for the duration of the test. CO and NOx emissions, catalyst plugging, and spark plug life were not affected by MMT.The effect of the gasoline antiknock additive, MMT, on automotive emission control systems was studied in a 63-car field test. The cars were operated for 50 000 miles, and the effects of MMT on hydrocarbon, CO and NOx emissions, catalyst plugging and spark plug life were determined.Two concentration levels of MMT in a clear base fuel were studied, 1/32 g Mn/gal and 1/16 g Mn/gal. Seven 1977-78 model year cars, all calibrated to meet California standards, were included in the statistical design.The results of this study indicate that the use of MMT at either test concentration increases both engine and tailpipe hydrocarbon emissions, compared to clear fuel. At 50K miles, the average tailpipe hydrocarbon increase was 0.09 g/mile for 1/32 MMT fuel, and 0.11 g/mile for 1/16 MMT fuel. This increase was pronounced at low mileage intervals, and significant differences continued for the duration of the test. CO and NOx emissions, catalyst plugging, and spark plug life were not affected by MMT.


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    Titel :

    Results of Coordinating Research Council MMT Field Test Program


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Benson, J. D. (Autor:in) / Painter, L. J. (Autor:in) / Campion, R. J. (Autor:in)

    Kongress:

    Passenger Car Meeting & Exposition ; 1979



    Erscheinungsdatum :

    01.02.1979




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Results of Coordinating Research Council MMT Field Test Program

    Benson,J.D. / Campion,R.J. / Painter,L.J. et al. | Kraftfahrwesen | 1979




    Review of coordinating research council activities

    Veal, C.B. | Engineering Index Backfile | 1945


    A Vehicle Test Technique for Studying Port Fuel Injector Deposits - A Coordinating Research Council Program

    Taniguchi, Brian Y. / Benson, Jack D. / Tupa, Robert C. | SAE Technical Papers | 1989