| 摘要 |
PURPOSE:To improve a degree of steering responsiveness so better, by installing a mechanical type decelerating device in an actuator steering rear wheels, while detecting displacement at the rear-wheel side of this device, and making it perform steering control, in case of a device controlling each steering angle of front and rear wheels variably in response to a car speed. CONSTITUTION:When a rack shaft 4 inside a gearbox 3 is slidden in both directions with rotation of a steering wheel 1 and symmetrical front wheels 7 are steered via a tie rod 5 and a knuckle arm 6, a motor 13 is driven and controlled by a computer 16 according to each output of a front steering angle sensor 14, a car speed sensor 17 and a manual select switch 18 selecting a steering ratio. With this constitution, a rack shaft 9 inside the gearbox 8 is slidden in both direction whereby symmetrical rear wheels 12 are steered. Then, a steering angle of these rear wheels is detected by a steering angle sensor 15 detecting displacement of the rack shaft 9, and the rear-wheel actual steering angle data obtained by this detection is fed back to the computer 16, thereby coming in useful for accurate steering control over the rear wheels 12. |
