The fuel property effects on first cycle mixture preparation were assessed by measuring the in-cylinder fuel equivalence ratio (Φ) with a Fast Flame Ionization Detector (FFID) using four different fuels. The Engine Coolant Temperature (ECT) was varied between -6°C and 80°C. The Φ values increased with both ECT and amount of injected fuel mass. The delivery fraction (fraction of the injected fuel that went into the combustible charge), however, increased with ECT but decreased with increase in injected fuel. The minimum required injected mass to produce a combustible mixture increased sharply with decrease in ECT below 20°C. There was, however, no single fuel parameter that would correlate with the measurements over the entire temperature range. Instead, the minimum required injected mass correlated to different distillation points on the ASTM distillation curve; e.g. at ECT of -6°C, it correlated to T20; at 40°C, it correlated to T50. Based on this data, an empirical procedure was established to assess the change of minimum required injected mass when the fuel properties were changed. A thermodynamics model was used to simulate the first cycle mixture preparation. The results were in good agreement with the data and thus quantitatively connected the fuel properties to the mixture preparation behavior.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Effect of Fuel Properties on First Cycle Fuel Delivery in a SI Engine


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    2004 Powertrain & Fluid Systems Conference & Exhibition ; 2004



    Publication date :

    2004-10-25




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Effect of Fuel Properties on First Cycle Fuel Delivery in a SI Engine

    Lang, K. R. / Cheng, W. K. / Society of Automotive Engineers | British Library Conference Proceedings | 2004


    Effect of fuel properties on first cycle fuel delivery in a spark ignition engine

    Lang,K.R. / Cheng,W.K. / Massachusetts Inst.of Technology,Cambridge,US | Automotive engineering | 2004


    Engine fuel delivery system

    SWANN PETER | European Patent Office | 2017

    Free access

    Effect of Intake Cam Phasing on First Cycle Fuel Delivery and HC Emissions in an SI Engine

    Thomas, Chris / Zhao, Fuquan / Lang, Kevin R. et al. | SAE Technical Papers | 2004


    Effect of intake cam phasing on first cycle fuel delivery and HC emissions in an spark ignition engine

    Lang,K.R. / Cheng,W.K. / Borland,M. et al. | Automotive engineering | 2004