A methanol fuelled single cylinder research engine was tested under simulated cold start conditions of 0°C. The engine instrumentation provided dynamic measurements of pressures and temperatures in the cylinder, inlet port, and exhaust port. Initially, tests were conducted to gain a better understanding of the metabolism of methanol cold starting under limit conditions. Following these tests the exhaust charged cycle (ECC), a form of prompt exhaust gas recirculation, was employed as a means of improving in-cylinder mixture formation during starting.Tests using a special camshaft to obtain prompt EGR showed that successful starts using neat methanol could be achieved if ignition occurred during cranking. Thus, unlike the standard engine configuration, the ignition and starting limits with the prompt EGR system were essentially the same. Prompt EGR typically gave higher and earlier peak cylinder pressures and produced heat release rates which were unusually rapid for cold start conditions. As well the modified system was found to be much more tolerant of the post-start and run-up fuelling calibration strategy than the standard system, making it easier to achieve idle speed without stalling.


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    Titel :

    Improving the Cold Start Combustion in Methanol Fuelled Spark Ignition Engines by Means of Prompt EGR


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Gardiner, D.P. (Autor:in) / Bardon, M.F. (Autor:in) / Battista, V. (Autor:in) / Rao, V.K. (Autor:in)

    Kongress:

    International Congress & Exposition ; 1991



    Erscheinungsdatum :

    01.02.1991




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Improving the cold start combustion in methanol fuelled spark ignition engines by means of prompt EGR

    Gardiner,D.P. / Rao,V.K. / Bardon,M.F. et al. | Kraftfahrwesen | 1991


    Improving the cold starting and running of spark ignition engines fuelled with neat methanol

    Gardiner,D.P. / Rao,V.K. / Bardon,M.F. et al. | Kraftfahrwesen | 1991


    Decomposed methanol an excellent cold start fuel for spark ignition engines

    Pettersson, L. / Sjoestroem, K. | Tema Archiv | 1986


    Cold Starting Tests on a Methanol Fuelled Spark Ignition Engine

    Gardiner, D. P. / Bardon, M. F. | SAE Technical Papers | 1983


    Cold Starting Tests on a Methanol Fuelled Spark Ignition Engine

    Gardiner,D.P. / Bardon,M.F. / Royal Military College of Canada,Dept.of Mech.Engng.,CA | Kraftfahrwesen | 1983