Vane type cam phasers have been widely used in internal combustion engines to vary valve timing to achieve purposes such as low emissions, greater torque, and higher horsepower. One of the primary concerns in using a vane phaser is its position holding ability when disturbances are present. Disturbances include cam torque oscillation, cam pulley speed fluctuation, oil pressure fluctuation, and engine acceleration or deceleration. Cam torque disturbance is the biggest contributor to phaser position error. This paper will first present the generic schematic of a variable cam phasing system and its challenges, followed by the characterization of the fluid dynamics of the vane phaser, with an emphasis on the effects of pressure, leakage, and oil aeration on the vane phaser fluid dynamics and its ability to reject cam torque disturbance. Finally, numerical evaluations of the vane phaser's ability to reject cam torque disturbance and sensitivity to various system parameters will be presented.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Characterization of Engine Variable Cam Phaser Fluid Dynamics and Phaser's Ability to Reject System Disturbances


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2004 World Congress & Exhibition ; 2004



    Publication date :

    2004-03-08




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Characterization of engine variable cam phaser fluid dynamics and phasers ability to reject system disturbances

    Zheng,L. / Plenzler,J. / Imagine Software,US et al. | Automotive engineering | 2004


    Characterization of Engine Variable Cam Phaser Fluid Dynamics and Phaser's Ability to Reject System Disturbances

    Zheng, L. / Plenzler, J. / Society of Automotive Engineers | British Library Conference Proceedings | 2004


    Design of an Electric Variable CAM Phaser Controller

    Cheever, G. / Sullivan, C. / Schten, K. et al. | British Library Conference Proceedings | 2012


    Continuously variable cam phaser optimization for spark ignition gasoline engine: a computational methodology approach

    Fiorenza,R. / Formisano,G. / Strazzullo,L. et al. | Automotive engineering | 2005


    Design of an Electric Variable CAM Phaser Controller

    Punater, Ash / Sullivan, Charles / Erickson, Clinton et al. | SAE Technical Papers | 2012