The requirement of reducing worldwide CO₂ emissions and engine pollutants are demanding an increased use of bio-fuels. Ethanol with its established production technology can contribute to this goal. However, due to its resistive auto-ignition behavior the use of ethanol-based fuels is limited to the spark-ignited gasoline combustion process. For application to the compression-ignited diesel combustion process advanced ignition systems are required. In general, ethanol offers a significant potential to improve the soot emission behavior of the diesel engine due to its oxygen content and its enhanced evaporation behavior.In this contribution the ignition behavior of ethanol and mixtures with high ethanol content is investigated in combination with advanced ignition systems with ceramic glow-plugs under diesel engine relevant thermodynamic conditions in a high pressure and temperature vessel. The investigation focuses on optimizing the injection conditions, especially injection pressure and rate. Optical measurements are performed by high speed imaging of the fuel injection and ignition, and evaluated in terms of ignition and flame propagation. The high speed imaging technology furthermore enables to gain information on the statistical behavior of the ignition process and thus provides a direct assessment of the repeatability of the ignition and combustion process.The results of the ignition investigation aim at improving the understanding of the glow-plug-induced ignition process in order to provide a reliable ignition strategy for the diesel engine operation with fuel with high ethanol content. The results show that the favorable spray targeting relative to the glow-plug depends on the glow-plug design. Furthermore a moderate injection pressure improves the ignition reliability of the ethanol fuels. The latter leads to the hypothesis that reduced injection-induced shear rates improve the ignition behavior by diminishing shear-induced quenching in the ignition zone in the direct vicinity of the hot glow-plug surface.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Glow-plug Ignition of Ethanol Fuels under Diesel Engine Relevant Thermodynamic Conditions


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2011 World Congress & Exhibition ; 2011



    Publication date :

    2011-04-12




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Glow-plug ignition of ethanol fuels under diesel engine relevant thermodynamic conditions

    Adomeit,P. / Jakob,M. / Kolbeck,A. et al. | Automotive engineering | 2011


    A glow-plug assisted direct-injection diesel engine using low-ignitability fuels

    Ikegami,M. / Shioji,M. / Umekita,K. et al. | Automotive engineering | 1990


    Ignition Behaviour of Marine Diesel Fuels under Engine Like Conditions

    Schmid, A. / Von Rotz, B. / Weisser, G. et al. | British Library Conference Proceedings | 2014


    Ignition Behaviour of Marine Diesel Fuels under Engine Like Conditions

    Schmid, Andreas / Von Rotz, Beat / Weisser, German et al. | SAE Technical Papers | 2014


    Glow plug assisted ignition and combustion of methanol in an optical direct ignition diesel engine

    Mueller,C.J. / Musculus,M.P. / Sandia National Lab.,Livermore,US | Automotive engineering | 2001