Toyota has succeeded in developing for mass production the active four-wheel steering (4WS) system using yaw rate feedback and steering anle feedforward control. The active 4WS system consists of a group of various sensors, including the newly developed yaw rate sensor, ECU, a rear wheel steering actuator that employs a stepping motor and hydraulic valve, and other hydraulic elements, which actively control the steering angle of the rear wheels. The new system ensurs a good response and a high level of stability for quick steering even during a high-speed drive. When the vehicle deflects due to a sudden side wind, road surface disturbance, or abrupt braking, steering is automatically corrected through the rear wheels to significantly improve forward stability. In addition, the system provides improved performance in making small radius turns because the rear wheels are steering up to five degrees when the front wheels are turned to a large angle. Also, improved vehicle maneuverability at low speed is obtained.


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    Title :

    Development of four wheel steering system using yaw rate feedback control


    Additional title:

    Entwicklung eines 4-Rad-Lenksystems mittels Abweichungsgrad-Rückkopplungsregelung


    Contributors:
    Sato, H. (author) / Kawai, H. (author) / Isikawa, M. (author) / Iwata, H. (author) / Koike, S. (author)

    Published in:

    Publication date :

    1991


    Size :

    7 Seiten, 13 Bilder, 11 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Development of four wheel steering system using yaw rate feedback control

    Sato,H. / Kawai,H. / Isikawa,M. et al. | Automotive engineering | 1991


    Development of Four Wheel Steering System Using Yaw Rate Feedback Control

    Sato, Hiroki / Kawai, Hiroyuki / Iwata, Hitosi et al. | SAE Technical Papers | 1991



    Feedback control of four-wheel steering using time delay control

    Song, J.G. / Yoon, Y.S. | Tema Archive | 1998


    Feedback control of four-wheel steering using time delay control

    Song,J.G. / Yoon,Y.S. / Korea Advanced Inst.of Science and Technol.,KR | Automotive engineering | 1998