| 摘要 |
<p>PURPOSE:To provide a highly reliable device with a simple configuration by changing over a rear wheel control valve into opposite phase mode if the amount of turning the steering wheel goes beyond a non-sensitive zone, and holding the valve out of changing-over to stay in the same phase mode in otherwise case. CONSTITUTION:When a steering wheel 11 is turned left greatly, the front wheels 14 are steered to the left and an actuator rod 20 moves largely to allow a stopper 27 to move a piston 22 right. Now a cable 30 is pulled in the direction of arrow 53 to change over a spool 36 to the left, so that a piston 50 moves left to steer the rear wheels 51 to the right. Because the abovementioned stopper 27 does not contact any of the pistons 21, 22 while the steering angle on the steering wheel 11 remains small, no changeover operation of the rear wheel control valve V will take place, and a controller 48 energizes solenoids 43, 44 to steer the rear wheels 51 in the same direction as the front wheels 14.</p> |
