| 摘要 |
PROBLEM TO BE SOLVED: To suppress a transverse drifting amount during traveling on a bank road by increasing an absolute value of a steering assist torque as a difference between a neutral speed and a vehicle speed becomes greater. SOLUTION: The vehicle steering device calculates the steering assist torque (compensated assist instruction value) for suppressing a transverse motion of a vehicle caused by disturbance, and applies the calculated steering assist torque to a steering system (causes a motor to output the calculated steering assist torque) based on a vehicle speed and a turning condition. Thus, during traveling on a bank road, by increasing an absolute value of the steering assist torque as a difference between a neutral speed at which a force acting downward on the bank road due to gravity and a force acting upward on the bank road due to a centrifugal force are balanced and the vehicle speed becomes greater, the transverse drifting amount during traveling on the bank road can be suppressed, for example, even when the neutral speed and the vehicle speed are different from each other. COPYRIGHT: (C)2009,JPO&INPIT |
