| 摘要 |
PURPOSE:To ensure the safety by prohibiting actuation of the device and giving an alarm, when it is sensed that no opposite phase actuation is generated from the output of an opposite phase sensing means in the condition that the output of a steering condition sensing means is to generate opposite phase steering. CONSTITUTION:Through a cylinder the front wheels 1 are steered from a steering wheel 10, and a same-phase control valve 98 uses this steering oil pressure as a pilot pressure and supplies one oil chamber of a rear power cylinder 90 with a same-phase steering force oil pressure. Meantime a controller 126 determines the steering angle speed from the output of a steering angle sensor 128, supplies a control signal to an opposite phase control valve 100 on the basis of the determined steering angle speed and a signal given by a car speed sensor 127, applies the opposite phase steering force oil pressure to the other oil chamber of the rear power cylinder 90, and steers the rear wheels 82 with synthetization of the same-phase and opposite phase steering forces. If therein out of opposite phase actuation is sensed from an opposite phase pressure sensing switch 131 even though the condition is such that the opposite phase steering shall be made, the controller 126 does not actuate the opposite phase control valve 100, but emits warning with a lamp 138. |
