Speciated HC emissions from the exhaust system of a production engine without an active catalyst have been obtained with 3 sec time resolution during a 70°F cold start using two control strategies. For the conventional cold start, the emissions were initially enriched in light fuel alkanes and depleted in heavy aromatic species. The light alkanes fell rapidly while the lower vapor pressure aromatics increased over a period of 50 sec. These results indicate early retention of low vapor pressure fuel components in the intake manifold and exhaust system. Loss of higher molecular weight HC species does occur in the exhaust system as shown by experiments in which the exhaust system was preheated to 100° C. The atmospheric reactivity of the exhaust HC emissions for photochemical smog formation increases as the engine warms.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Time-Resolved Measurement of Speciated Hydrocarbon Emissions During Cold Start of a Spark-Ignited Engine


    Additional title:

    Sae Technical Papers



    Conference:

    International Congress & Exposition ; 1994



    Publication date :

    1994-03-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Time-resolved measurement of speciated hydrocarbon emissions during cold start of a spark-ignited engine

    Kaiser,E.W. / Siegl,W.O. / Baidas,L.M. et al. | Automotive engineering | 1994


    Speciated hydrocarbon emissions of spark ignition engine during cold start and warm-up

    Kubo,S. / Yamamoto,M. / Kizaki,Y. et al. | Automotive engineering | 1993


    Speciated Hydrocarbon Emissions of SI Engine During Cold Start and Warm-up

    Nakanishi, Kiyoshi / Yamamoto, Masami / Yamazaki, Satoshi et al. | SAE Technical Papers | 1993


    Effect of Fuel Preparation on Cold-Start Hydrocarbon Emissions from a Spark-Ignited Engine

    Cramer, Carl F. / Kaiser, Edward W. / Connolly, Frank T. et al. | SAE Technical Papers | 1996


    Exhaust hydrocarbon emissions during the running-in of a spark ignited engine

    Willcock,M. / Tidmarsh,D. / Foss,P. et al. | Automotive engineering | 1991