This paper describes a detailed evaluation of overhead camshaft valve actuation. The conventional pushrod-operated valve train is compared to direct-acting and rocker-actuated overhead camshaft systems by both analytical and experimental means. The effect of the various methods of valve actuation on valve train weights, forces, and stresses is discussed. It is shown that the principal advantage of overhead camshafts is the increased natural frequency of the valve train. The resulting improved dynamic characteristics of the valve-actuating mechanism make it possible to design camshaft profiles which expand the useful operating range of high-speed engines.


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    Titel :

    THE ADVANTAGES OF OVERHEAD CAMSHAFTS–WHAT ARE THEY?


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    1968 Automotive Engineering Congress and Exposition ; 1968



    Erscheinungsdatum :

    01.02.1968




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


    Advantages of overhead camshafts -- What are they

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    Cast camshafts

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    Testing camshafts

    Engineering Index Backfile | 1932


    Grinding camshafts

    Engineering Index Backfile | 1930


    Measurement of Camshaft Wear - Wear and Kinematics of Overhead Camshafts

    Purmer,P.D. / van den Berg,W. / Shell Res.,NL | Kraftfahrwesen | 1985