This project studied the results of previous research on the potential effects of variable valve timing for improving automotive engine fuel economy. Methods of implementation of valve timing control and their practicality were also assessed. Some of the sources claim fuel economy improvements as high as 18 to 20 % but conclusions suffler from insufficient test data as well as a recording of major variables. Other deficiencies include insufficient attention to effects on driveability; lack of standard reference for data comparisons; and little consideration toward manufacturing feasibility. It is concluded that savings of 5 to 10 % over the normal drive cycle are probably realizable providing emphasis is directed towards optimizing valve timing schedules at low speeds under low loads as opposed to the current practice of wide open throttle. Methods if implementation as reported from research programs and patent disclosures were also evaluated, categorized and assessed for manufacturing practicability.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    The assessment of variable valve timing of internal combustion engines for fuel economy improvements and practicability


    Weitere Titelangaben:

    Bewertung der zeitvariablen Motorsteuerung bei Brennkraftmaschinen als Instrument der Energieeinsparung: Durchfuehrbarkeit


    Beteiligte:
    Taylor, T. jun. (Autor:in) / Kallin, R.L. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1981


    Format / Umfang :

    71 Seiten


    Medientyp :

    Report


    Format :

    Print


    Sprache :

    Englisch




    Improvements in fuel injection of internal combustion engines

    Cazalis, L. | Engineering Index Backfile | 1945


    The Synthesis and Analysis of Variable-Valve-Timing Mechanisms for Internal-Combustion Engines

    Maki, E.R. / Freudenstein, F. / Tsai, Lung-Wen | SAE Technical Papers | 1988


    The synthesis and analysis of variable-valve-timing mechanisms for internal combustion engines

    Freudenstein,F. / Maki,E.R. / Tsai,L.W. et al. | Kraftfahrwesen | 1988


    Fuel economy improvements with fast burn combustion in gasoline engines

    Curello,F.A. / Garibaldi,A.P. | Kraftfahrwesen | 1990


    Fuel Economy Improvements With EMD Engines

    Wadman,B. / General Motors, Electromotive Div.,US | Kraftfahrwesen | 1983