The valve train was instrumented to record the instantaneous roller speed, roller pin friction torque, pushrod forces, and cam speed. Results are presented for one exhaust valve of a motored Cummins L-10 engine. The instantaneous cam/roller friction force was determined from the instantaneous roller speed and the pin friction torque. The pushrod force and displacement were also measured. Friction work loss was determined for both cam and roller interface as well as the upper valve train which includes the valve pushrod, rocker arm, valve guide, and valve. Roller follower slippage on the cam was also determined. A kinematic analysis with the measured data provided the normal force and contact stress at cam/roller interface.(1) Finally, the valve train friction was found to be in the mixed lubrication regime.(2)Further efforts will address the theoretical analysis of valve train friction to predict roller slippage.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Friction Measurement in the Valve Train with a Roller Follower


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    International Congress & Exposition ; 1994



    Erscheinungsdatum :

    01.03.1994




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Friction measurement in the valve train with a roller follower

    Lee,J. / Patterson,D.J. / Morrison,K.M. et al. | Kraftfahrwesen | 1994


    Analysis of cam/roller follower friction and slippage in valve train systems

    Lee,J. / Patterson,D.J. / Southwest Research Inst.,San Antonio,US et al. | Kraftfahrwesen | 1995


    Analysis of Cam/Roller Follower Friction and Slippage in Valve Train Systems

    Patterson, Donald J. / Lee, Jongmin | SAE Technical Papers | 1995


    Studies on Friction Loss of Valve Train with Roller Follower (Influence of Solid Contact between Cam and Roller)

    Nagafuji, M. / Soejima, M. / Ogawa, E. et al. | British Library Conference Proceedings | 2005


    Studies on Friction Loss of Valve Train with Roller Follower - Influence of Solid Contact between Cam and Roller -

    Soejima, M. / Nagafuji, M. / Ogawa, E. et al. | British Library Online Contents | 2006