Toyota has succeeded in developing for mass production the active four-wheel steering(4WS) system using yaw rate feedback and steering angle 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 ensures a good response and a high level of stabililty for quick steering wen 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 prwides 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:

    Sae Technical Papers


    Contributors:

    Conference:

    Passenger Car Conference & Exposition ; 1991



    Publication date :

    1991-09-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Development of four wheel steering system using yaw rate feedback control

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    Development of four wheel steering system using yaw rate feedback control

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    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