The results of an investigation into intake system fuel evaporation are used to study the influence of engine speed on fuel anti-knock performance. It is found that, while adding methanol to gasoline causes dramatic cooling at low engine speeds, this relative effect is lost at higher speeds, primarily due to lower residence times. At low speeds, the cooling inhibits knock for methanol-gasoline blends. However, at high speeds, these blends are found to lose this relative advantage, removing the knock inhibition provided by cooling, and this facilitates knocking at high speeds.


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    Title :

    Fuel Evaporation and the High Speed Knock Phenomenon of Methanol-Gasoline Blended Fuels


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Fuels & Lubricants Meeting & Exposition ; 1994



    Publication date :

    1994-10-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English







    Characterization of Emissions from Methanol and Methanol/Gasoline Blended Fuels

    Schuetzle, Dennis / Anderson, Richard D. / Prater, Thomas J. | SAE Technical Papers | 1981


    Characterization of Emissions from Methanol and Methanol/Gasoline Blended Fuels

    Schuetzle,D. / Prater,T.J. / Anderson,R.D. et al. | Automotive engineering | 1981