This paper presents a general discussion of automatic transmission parasitic losses and efficiency characteristics. Efficiency characteristics of the three major automatic transmission components - pump, torque converter, and gearbox - and their contribution to the transmission total torque losses are examined. A data reduction method for isolating gearbox torque losses from total transmission losses is also described. The information presented is based on pump, torque converter, and transmission testing performed at SwRI for Ford Motor Company. Test data was used to perform analytical fuel economy benchmarking studies. Testing included 13 transmissions manufactured by American, European, and Japanese manufacturers for 3.0-5.8L truck applications.


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    Title :

    Automatic transmission efficiency characteristics and gearbox torque loss data regression techniques


    Additional title:

    Wirkungsgradcharakteristiken des automatischen Getriebes. Bestimmung der Drehmomentverluste im Getriebe mit der Regressionstechnik


    Contributors:

    Published in:

    Publication date :

    1993


    Size :

    7 Seiten, 18 Bilder, 2 Tabellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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