Legislative restrictions on the currently limited exhaust gas components and the future CO2 emissions limits have led to intensive research in the field of alternative fuels and innovative combustion approaches. Increased homogeneity of air-fuel mixture through advanced injection is one combustion approach, which potentially reduces engine-out nitrogen oxide and particulate emissions, with good fuel consumption in certain load ranges. Ignition characteristics under homogenous combustion conditions differ from those under heterogeneous conditions. Among other reasons, this is due to the increased role of low temperature chemistry with increasing homogeneity.The ignition behaviour of diesel fuels is characterised by the Cetane number (CN), which is, however, determined at significant higher temperatures than those prevalent during ignition under homogenous combustion. As a result, its relevance as a fuel characteristic number requires evaluation. In this work, the relevance of CN and other candidates as a characteristic number has been analysed under partly homogeneous combustion conditions.The investigations have been performed on a single cylinder heavy duty diesel engine. Increased mixture homogeneity was achieved through multiple pilot injections in addition to a main injection in the vicinity of ignition top dead centre (TDC). In order to identify a global characteristic number, fuels with different properties, including types of diesel, kerosene and naphtha-based fuels, were selected for the study. The ignition delay measured at the engine were validated with shock tube measurements, The correlation between the ignition delay and the candidate characteristic numbers like initial boiling point, molecular weight and activation energy have been analytically evaluated.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Characterisation of Fuel Ignition under Partly Homogeneous Diesel Combustion


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2014 World Congress & Exhibition ; 2014



    Publication date :

    2014-04-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Characterisation of Fuel Ignition under Partly Homogeneous Diesel Combustion

    Rajamani, V.K. / Rohs, H. / Society of Automotive Engineers | British Library Conference Proceedings | 2014


    Ideal Homogeneous Combustion versus Partly Homogeneous Combustion for PC Diesel Engines

    Haas, S. / Bargende, M. / Berner, H.J. et al. | British Library Conference Proceedings | 2007


    Ideal homogeneous combustion versus partly homogeneous combustion for PC diesel engines

    Berner, Hans-Jürgen / Bargende, Michael / Haas, Simon | SAE Technical Papers | 2007


    Ideal homogeneous combustion versus partly homogeneous combustion for passenger car diesel engines

    Haas,S. / Bargende,M. / Berner,H.J. et al. | Automotive engineering | 2007


    Influence of the Combination of Fuel Properties for a DI-Diesel Engine Under Partly Homogeneous Combustion

    Jeihouni, Y. / Ruhkamp, L. / Pischinger, S. et al. | British Library Conference Proceedings | 2013