A viscous damper is used as part of the automatic transaxle torque converter in some new passenger cars for improved driveability and fuel economy. A viscous silicone fluid is a critical component of the damper. Fluid viscosity-shear rate characteristics were determined in the laboratory for temperatures of 25 to 150 °C at shear rates from 400 to over 6000 reciprocal seconds. Using these data, and the dimensions of the viscous damper, a mathematical model was developed which predicts viscous damper output torque. Correlation between model predictions and actual measured torques from dynamometer tests was excellent. As a result, the mathematical model is useful for predicting viscous damper performance from measured fluid viscosity-shear rate characteristics. Also, since the model includes the critical viscous damper dimensions, it can be used for determining effects of damper design modifications on damper performance.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Modeling Torque Converter Clutch Viscous Damper Performance


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE International Congress and Exposition ; 1985



    Publication date :

    1985-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Modeling Torque Converter Clutch Viscous Damper Performance

    Tung,S. / Linden,F.L. / General Motors Research Labs,US | Automotive engineering | 1985


    Modeling torque converter clutch viscous damper performance

    Tung, S.T. / Linden, J.L. | Tema Archive | 1985


    Centrifugal Torque Converter Clutch

    Silberschlag, Russell | SAE Technical Papers | 1984


    Centrifugal torque converter clutch

    Silberschlag,R. / Borg-Warner,US | Automotive engineering | 1984


    Torque converter clutch engagement pressure

    ZHAO YANAN / NEFCY BERNARD D / KUANG MING LANG | European Patent Office | 2018

    Free access