In this paper, optimal tire force distribution for a vehicle under steady-state cornering is discussed. The objective is to achieve maximum longitudinal acceleration without compromising the curve following ability of the vehicle. Four vehicle configurations are considered: single-wheel-steering, single wheel-drive; four-wheel-steering, single wheel-drive; four-wheel steering, four-wheel drive; and human steering, four-wheel-drive. It was found that single-wheel-steering offers no benefits over four-wheel-steering vehicles. Torque split four-wheel-drive mechanism only reduces the performance by about 1 % (when the lateral acceleration is 0.3 G) if the split ratio is adjusted according to the road friction. When the split ratio is fixed (say, 50/50), the performance may deteriorate by up to 20 %. When the steering is controlled by human drivers and the longitudinal forces are constrained not to generate yaw moment, the maximum acceleration and deceleration are about 16 % lower than the optimal cases (with adaptive torque split ratio, 0.3G lateral acceleration). Under the same (no yaw moment) constraint, the extra performance limit introduced by conventional differentials is very minimal.


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    Title :

    Traction/braking force distribution for optimal longitudinal motion during curve following


    Additional title:

    Die für eine optimale Längsbewegung bei Kurvenfahrten erforderliche Verteilung von Antriebs- und Bremskräften


    Contributors:
    Peng, H. (author) / Hu, J.S. (author)

    Published in:

    Vehicle System Dynamics ; 26 , 4 ; 301-320


    Publication date :

    1996


    Size :

    20 Seiten, 15 Bilder, 1 Tabelle, 16 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English