【発明の名称】4輪操舵制御装置

Japanese Patent JP2505238

B2

A steering control system comprises means for performing a secondary steer of front and rear wheels by angles computed using a steer angle theta , steer angle angular velocity theta and vehicle speed V from the following formulas, where delta f is a front wheel secondary steer angle, delta r is a rear wheel secondary steer angle, N is a steer gear ratio and Kf, Kr, Tf and Tr are control constants which are functions of vehicle speed. In accordance with the present invention, the control system is provided with means for correcting the control constants Kf and Kr in such a way that the control constants Kf and Kr become a steady-state value when the steer angle is larger than a predetermined value and become smaller than the steady-state value when the steering angle becomes smaller than the predetermined value, means for correcting the control constants Tf and Tr in such a way that the control constants Tf and Tr become a steady-state value when the steer angle is larger than a predetermined value and become smaller than the second mentioned steady-state value when the steer angle becomes smaller than the second mentioned predetermined value, means for correcting the control constants Kf and Kr in such a way that the control constant Kr reduces at the rate larger than the control constant Kf as the steer angle reduces from the first mentioned predetermined value, and means for correcting the control constants Tf and Tr in such a way that the control constant Tf reeduces at the rate larger than the control contant Tr as the steer angle reduces from the second mentioned predetermined value.

MORI KAZUNORI
SUGASAWA FUKASHI
KAWAGOE KENJI
MORI HIROSHI

JP2885888A

June 05, 1996

February 12, 1988

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NISSAN MOTOR

B62D6/00; B62D7/14; B62D7/15; B62D101/00; B62D113/00; B62D117/00; (IPC1-7): B62D7/14; B62D6/00

Akihide Sugimura (1 outside)

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