| 摘要 |
<p>PURPOSE:To always make the behavior of a vehicle body due to the changes of vehicle speed in turning at the constant steering angle of a steering wheel approximately constant irrespective of the vehicle speed by suitably setting the rate of change to the vehicle speed of the transmission ratio of turn steering angle. CONSTITUTION:An input shaft 6 is coupled to an output shaft 7 by means of a differential gear structure 8. A sector gear 14 is provided in the pinion carrier 13 of this differential gear structure 8, and pinion 16 which is fixed to the rotary shaft of a motor 15 is engaged with the sector gear 14. The motor 15 is controlled by a controller 17 on the basis of a vehicle speed signal from a vehicle speed sensor 18. Namely, the transmission ratio of turn steering angle is changed in response to the vehicle speed, and is controlled to increase the rate of change in a low vehicle speed region and to decrease the rate of change in a high vehicle speed region. As a result, the behavior of a vehicle body such as lateral acceleration acting on the vehicle body or rolling etc. is always made approximately constant irrespective of the vehicle speed.</p> |
