The U.S. EPA has proposed a Tier 3 rule to lower average NMOG+NOx emissions from new light duty vehicles by approximately 80% from 2017 to 2025. Early in this time period, gasoline-fueled vehicles are expected to use technologies similar to California SULEV-II/PZEV certified models currently in limited production. These late model vehicles feature engine control systems that promote rapid catalyst light-off and are designed for ultra-high catalyst conversion efficiency.To enable the use of advanced catalyst coatings and materials, the EPA is also proposing to limit the sulfur content of gasoline to an annual average of 10 ppm while optionally maintaining the current maximum cap of 80 ppm. Fuel sulfur is known to poison precious metal-based catalysts, and the impact on emissions is well understood for older technology vehicles. However, there is a lack of test data on the sensitivity and reversibility of late model vehicle emissions to sulfur.This study evaluated six late model vehicles to determine if the exhaust emissions effects caused by exposure to 80 ppm high sulfur fuel were reversible, after the vehicles were refueled with 10 ppm sulfur fuel. Catalysts and sensors were aged to full useful life in the laboratory and then installed on the vehicles for testing. A statistical analysis concluded that there was no difference in the mean emissions of NMOG, NOx, CO, Soot and PN measured before and after the high sulfur fuel exposure. The emissions effects caused by high sulfur fuel exposure were reversible for all vehicles with 95% confidence.


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    Titel :

    Reversibility of Gasoline Sulfur Effects on the Exhaust Emissions of Late Model Vehicles


    Weitere Titelangaben:

    Sae Int. J. Fuels Lubr
    Sae International Journal of Fuels and Lubricants


    Beteiligte:
    Reek, Aaron (Autor:in) / Vertin, Keith (Autor:in)

    Kongress:

    SAE 2014 World Congress & Exhibition ; 2014



    Erscheinungsdatum :

    2014-04-01


    Format / Umfang :

    16 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Reversibility of Gasoline Sulfur Effects on the Exhaust Emissions of Late Model Vehicles

    Vertin, K. / Reek, A. / Society of Automotive Engineers | British Library Conference Proceedings | 2014


    Reversibility of Sulfur Effects on Emissions of California Low Emission Vehicles

    Schlenker, Ann M. / Schleyer, Charles H. / Eckstrom, John et al. | SAE Technical Papers | 1999


    Investigation of Sulfur Sensitivity and Reversibility in Late-Model Vehicles

    Lax, David / Lyons, James M. / Welstand, Steve | SAE Technical Papers | 1999


    Investigation of sulfur sensitivity and reversibility in late-model vehicles

    Lyons,J.M. / Lax,D. / Welstand,S. et al. | Kraftfahrwesen | 1999


    Investigation of Sulfur Sensitivity and Reversibility in Late-Model Vehicles

    Lyons, J. M. / Lax, D. / Welstand, S. et al. | British Library Conference Proceedings | 1999