The influences of the transmittable torque capacity were evaluated using commercial CVT unit. We found that the contact surface between the belt and pulley lie in boundary lubrication. The maximum torque capacity difference among all tested fluids reached up to 40%. In order to analyze the friction characteristics of contact parts of CVT, a block on disk type friction test was created. As a result, the torque capacity in actual CVT correlated with the friction coefficient of the friction test. In addition, the effects of oil additives on the torque capacity were investigated. The combination of detergent (overbased calcium sulfonate) and phosphorus additive was the most effective for increasing friction coefficient. The formation of calcium carbonate, iron phosphate, and calcium phosphate on the friction surface possibly has a great impact on the increment torque capacity.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Improvement of Torque Capacity of Metal V-Belt Type CVT Fluids


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    2003 JSAE/SAE International Spring Fuels and Lubricants Meeting ; 2003



    Publication date :

    2003-05-19




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Improvement of torque capacity of metal V-belt type CVT fluids

    Narita,K. / Abe,A. / Deshimaru,J. et al. | Automotive engineering | 2003


    2003-01-1977 Improvement of Torque Capacity of Metal V-Belt Type CVT Fluids

    Narita, K. / Abe, A. / Deshimaru, J. et al. | British Library Conference Proceedings | 2003


    Improvement of Torque Capacity of Belt-CVT by Micro Shot Peening

    Ikeda, A. / Yoshida, M. / Takekawa, S. et al. | British Library Conference Proceedings | 2001


    Testing the Torque Capacity of CVT Fluids

    Constans, Bernard / Gresser, Elise / Itoh, Fumitaka et al. | SAE Technical Papers | 2004


    Testing the torque capacity of CVT fluids

    Thomas,J. / Constans,B. / Gresser,E. et al. | Automotive engineering | 2004