| 摘要 |
PURPOSE:To improve a degree of responsiveness in quick turning as well as to make improvements in rectilinear running stability in time of slow turning, by controlling a stering direction of rear wheels to a front-wheel steering direction according to a speed of steerange of a steering wheel and a car speed. CONSTITUTION:When a speed of steerage of a steering wheel is slow, the steering direction of rear wheels 14 is controlled in the same direction of that of front wheels 6. And, a steering angle deltarc of these rear wheels 14 in time of high speed in a car is controlled so as to become smaller than a steering angle deltara of these wheels 14 in time of low-and medium speed in the car. In addition, when the speed of steerage of the steering wheel is high, if the car speed is low or medium one, the steering direction of rear wheels 14 is controlled in the reverse direction against that of front wheels. In proportion as the car speed comes high, each steering angle of these rear wheels 14 is controlled so as to become small, and if the car speed enters a high speed range, the steering direction of these rear wheels 14 is controlled in the same direction as the steering direction of front wheels 6. However, a rear-wheel steering angle deltard at this time is set to be small. |
