Past experience indicates that the method for evaluating the foaming tendencies of automatic transmission fluids, shown in the “Specification for Automatic Transmission Fluid, Type A, Suffix A,” is adequate for the qualification of fluids for transmission operation. Its usefulness, however, for evaluating field failures and for monitoring the shelf-life stability of the foam inhibitor is severely limited by the fact that the procedure requires a sample size of at least 6 qt.The purpose of this paper is to present a new test procedure for the evaluation of foaming tendencies that utilizes a small sample size (500 ml) and shows good correlation with the results obtained during qualification.The paper also presents the results of studies which were necessary for the development of the proposed test procedure. These studies were concerned with the mechanism of foam formation and collapse, with the conditions affecting the equilibrium between the rates of formation and collapse, with air entrainment and retention in the fluid, and with the effect of siloxane additives on the foaming characteristics of the fluids.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Evaluation of the Foaming Tendencies of Automatic Transmission Fluids


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    Pre-1964 SAE Technical Papers ; 1906



    Publication date :

    1963-01-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Foaming and Air Entrainment in Automatic Transmission Fluids

    Dixon,L.T. / Korcek,S. / Ford Motor,Fuels and Lubr.Dep.,US | Automotive engineering | 1976


    Foaming and Air Entrainment in Automatic Transmission Fluids

    Dixon, L. T. / Korcek, S. | SAE Technical Papers | 1976


    Procedures for evaluation of automatic transmission fluids

    Fuelberth, W.K. / Sharp, H.L. / Wilkins, R.A. | Engineering Index Backfile | 1966


    Procedures for the Evaluation of Automatic Transmission Fluids

    Sharp, Harold L. / Wilkins, Robert A. / Fuelberth, Walter K. | SAE Technical Papers | 1966


    EVALUATING AUTOMATIC TRANSMISSION FLUIDS

    KOENIG, E. F. / KITE, WILLIAM H. | SAE Technical Papers | 1959