One very effective way to improve fuel economy of motor vehicles is to reduce the viscosity of the automatic transmission fluid (ATF). However, viscometric constraints often exist for a particular ATF application. The proper choice of viscosity index (VI) improver allows viscosity reduction at lower temperatures, while maintaining viscosity at higher temperatures. This study shows that molecular weight of a VI improver is a key factor to achieve high thickening efficiency, improved shear stability and limited metal fatigue failure simultaneously. Based on this study, an optimum VI improver has been found and a new fuel economy ATF was developed.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Study of Viscosity Index Improver for Fuel Economy ATF


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE Powertrain & Fluid Systems Conference & Exhibition ; 2003



    Publication date :

    2003-10-27




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Study of viscosity index improver for fuel economy ATF

    Umamori,N. / Kugimiya,T. / TonenGeneral Sekiyu,JP | Automotive engineering | 2003


    Study of Viscosity Index Improver for Fuel Economy ATF

    Umamori, N. / Kugimiya, T. / SAE | British Library Conference Proceedings | 2003


    Evaluation of a Butadiene-Styrene Viscosity Index Improver

    Mitacek, Bill / Yochum, K. H. / Streets, W. L. | SAE Technical Papers | 1976


    Behavior of viscosity index improver-containing oils in non-steady state contacts

    Gunsei,S. / Smeeth,M. / Spikes,H. et al. | Automotive engineering | 1998


    Megatrend fuel economy: how to optimize viscosity with viscosity index improvers

    Seemann,M. / Lauterwasser,F. / Smolenski,D.J. et al. | Automotive engineering | 2015