Till 1980 Four-Wheel-Drive (4WD) was almost exclusively used for off road vehicles. Today nearly every European or Japanese vehicle manufacturer has in his product program a passenger car with 4WD. The systems used reach from a manual engagement of the second axle to a computer controlled power train. The purpose of this paper is, to elaborate on the most important differences of the available 4WD systems especially regarding the torque split. Emphasis is laid on the application of the viscous unit for torque transfer and torque control. New calculation methods confirm test results, proving that a vehicle using a viscous coupling for torque transfer has, indeed, permanent 4WD.


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    Title :

    Permanent and part-time four wheel drive and typical tractive force distribution


    Additional title:

    Permanenter und zeitweiser Vierradantrieb und typische Zugkraftverteilung


    Contributors:
    Lanzer, H. (author)

    Published in:

    SAE-Papers ; Sep ; 1-11


    Publication date :

    1986


    Size :

    11 Seiten, 14 Bilder, 2 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Permanent and Part-Time Four Wheel Drive and Typical Tractive Force Distribution

    Lanzer,H. / Steyr-Daimler-Puch,AT | Automotive engineering | 1986



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