This study investigates the wear characteristics of a variable valve timing (VVT) system used to vary the phasing of the inlet valve events on a medium speed marine diesel engine.The running-in properties of critical components within the system are examined.The effect of surface finish and surface hardness upon wear is examined. It was found that in order to prevent excessive wear between the roller and tappet follower then the roller should be harder than the tappet. Tappet and roller hardness values of 60 and 70 Rockwell Hardness ‘C’ (HRC) respectively were found to be satisfactory.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Wear Characteristics of a Roller Follower Variable Valve Timing System


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Off-Highway & Powerplant Congress & Exposition ; 1995



    Publication date :

    1995-09-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Wear Characteristics of a Roller Follower Variable Valve Timing System

    Leonard, H. J. / Stone, C. R. / Donaldson, C. P. et al. | British Library Conference Proceedings | 1995


    Design and Analysis of a Roller Follower Variable Valve Timing System

    Elliot, C. / Stone, C. R. / Johnston, D. N. et al. | SAE Technical Papers | 1993


    Design and analysis of a roller follower variable valve timing system

    Leonard,H.J. / Stone,C.R. / Charlton,S.J. et al. | Automotive engineering | 1993


    Analysis of Roller-Follower Valve Gear

    Stone, C. R. / Leonard, H. J. / Colechin, M. | SAE Technical Papers | 1993


    Analysis of roller-follower valve gear

    Colechin,M. / Stone,C.R. / Leonard,H.J. et al. | Automotive engineering | 1993