The new California LEV-II regulations for “near zero” evaporative emissions require a 75% reduction from current emission levels for light duty vehicles. To meet the challenge of satisfying these new regulations, there is an immediate need for an increased understanding of the sources of evaporative emissions. Hydrocarbon speciation by gas chromatography is a powerful analytical tool for determining the composition of complex hydrocarbon mixtures. Gas chromatography and gas chromatography/mass spectrometry were used to identify the volatile organic compounds (VOC) present in the evaporative emissions from a number of prototype and recent production model gasoline-fueled vehicles. For a “typical” evaporative emissions sample, more than 90% of the emissions were found to be fuel-type hydrocarbons. When emission profiles from 2-day diurnal (SHED) tests on different vehicles were compared in terms of their gross features, discernable patterns emerged which provide valuable information regarding the sources of emissions. These profiles can be used to identify the probable cause of a failed SHED test. This report describes the application of the speciation methodology, provides examples of information obtained, and establishes a case for collecting speciation samples from all developmental SHED tests.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Identifying Sources of Evaporative Emissions - Using Hydrocarbon Profiles to Identify Emission Sources


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2000 World Congress ; 2000



    Publication date :

    2000-03-06




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Identifying Sources of Evaporative Emissions - Using Hydrocarbon Profiles to Identify Emission Sources

    Siegl, W. O. / Guenther, M. T. / Henney, T. et al. | British Library Conference Proceedings | 2000


    Identifying sources of evaporative emissions - using hydrocarbon profiles to identify emission sources

    Siegl,W.O. / Guenther,M.T. / Henney,T. et al. | Automotive engineering | 2000


    Windshield Washer Fluid and R134A as Evaporative Emissions Sources

    Cullen, K. / Coordinating Research Council | British Library Conference Proceedings | 2002


    Sources of Hydrocarbon Emissions in Rotary Engines

    Burley, Harvey A. / Meloeny, Michael R. / Stark, Terrence L. | SAE Technical Papers | 1978


    Sources of hydrocarbon emissions in rotary engines

    Burley, H.A. / Meloeny, M.R. / Stark, T.L. | Tema Archive | 1978