Optimized valve timing, according to engine load, may lead to significant improvements in pumping losses and internal EGR generation. Thus, VVT technology constitutes an effective way to reduce both fuel consumption and pollutant emissions.In this paper, the behavior of a small displacement, 2 valve, Spark-ignition engine, with variable valve timing, has been numerically and experimentally analyzed.The use of VVT allows obtaining combined internal EGR and Reverse Miller Cycle effects so to achieve a significant dethrottling at part load operation.High EGR rates require high turbulence intensity in order to accelerate the combustion rate. The engine performs an accurate combustion chamber design and a tangential intake port able to generate optimized swirl motion, according to the engine speed and load, during both the exhaust gas re-aspiration and the intake stroke. Engine performances at different cam phaser positions have been calculated by means of a 3-D computer code. Many of the obtained results have been compared to the measured data provided by ELASIS research center.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Experimental And Numerical Analysis Of A Small VVT S.I. Engine


    Additional title:

    Sae Technical Papers


    Contributors:
    Galloni, E. (author) / Torella, E. (author) / Fontana, G. (author)

    Conference:

    7th International Conference on Engines for Automobile ; 2005



    Publication date :

    2005-09-11




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Numerical and experimental analysis of different combustion chambers for a small spark ignition engine

    Fontana,G. / Galloni,E. / Palmaccio,R. et al. | Automotive engineering | 2004


    Numerical and Experimental Analysis of Different Combustion Chambers for a Small Spark-Ignition Engine

    Galloni, E. / Torella, E. / Fontana, G. et al. | SAE Technical Papers | 2004


    Medium Pressure Injection System for Small Diesel Engine Application: Numerical Simulation and Experimental Results

    Papaleo, Domenico / Bonandrini, Giovanni / Zappalà, Leonardo et al. | SAE Technical Papers | 2014


    AIR COOLING SYSTEM FOR SMALL INTERNAL COMBUSTION ENGINE EXPERIMENTAL ANALYSIS

    Vacca, A. / Facchini, B. / Migliorini, G. et al. | SAE Technical Papers | 2001


    NUMERICAL AND EXPERIMENTAL ANALYSIS OF A SINGLE STAGE DRONE JET ENGINE

    Soloiu, Valentin / Grall, Drake T. / Ilie, Marcel et al. | TIBKAT | 2021