Measurements of the instantaneous heat flux at three positions on the cylinder head surface, and the steady-state cylinder head temperatures at four positions on the cylinder head have been obtained. Engine tests were performed for a range of air-fuel ratios including regimes rich of stoichiometric, stoichiometric, and lean of stoichiometric. In addition, ignition timing was advanced in increments from 22° BTDC to 40° BTDC.All tests were run with the throttle either fixed in the wide open position, or fixed in a position that produced 75% of the maximum power with the standard ignition timing and an air-fuel ratio of 13.5. This was done to ensure that changes in air mass flow rate were not influencing the results. In addition, all tests were performed with a fuel mixture preparation being provided by system designed to deliver a homogeneous premixed charge to the inlet port. This was done to ensure that mixture preparation issues were not confounding the results.Based on the results of the heat flux measurements, a phenomenological model for spatially resolved predictions of the steady-state heat flux to the cylinder head was developed. This model allows prediction of the changes in steady state flux to the cylinder head occurring as a result of changes in air-fuel ratio, load, and ignition timing.The phenomenological model was used in a finite element prediction of energy flows in the nonmoving parts of the engine. In-cylinder boundary conditions were determined using the phenomenological model. Comparisons of steady state temperatures predicted from the finite element analysis with those measured in the engine tests showed good agreement.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Steady-State Thermal Flows in an Air-Cooled, Four-Stroke Spark-Ignition Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Tillock, Brad R. (Autor:in) / Boyce, Brian P. (Autor:in) / Martin, Jay K. (Autor:in)

    Kongress:

    International Congress & Exposition ; 1999



    Erscheinungsdatum :

    1999-03-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Steady-State Thermal Flows in an Air-Cooled Four-Stroke Spark-Ignition Engine

    Boyce, B. P. / Martin, J. K. / Tillock, B. R. et al. | British Library Conference Proceedings | 1999


    Steady-state thermal flows in an air-cooled, four-stroke spark-ignition engine

    Boyce,B.P. / Martin,J.K. / Tillock,B.R. et al. | Kraftfahrwesen | 1999



    Modulization of four-stroke single-cylinder spark-ignition air-cooled engine models

    Wu, Y-Y / Chen, B-C / Hsieh, F-C | SAGE Publications | 2007


    Modulization of four-stroke single-cylinder spark-ignition air-cooled engine models

    Wu,Y.Y. / Chen,B.C. / Hsieh,F.C. et al. | Kraftfahrwesen | 2007