| 摘要 |
PURPOSE:To enhance the revolving characteristics by automatically operating the steering of a trailer on the basis of the hitch angle formed from the axis of a tractor and the traction rod of trailer, and thereby performing steering of the trailer quickly. CONSTITUTION:Steering of a tractor 2 is operated, and the front wheels 30 are given a certain angle to the axis 31, to allow running along an arc of circle C. Thereby angle alpha1 is formed with the axis 31 of tractor 2 and the traction rod 3. The angle alpha1 is sensed by a hitch angle sensor 25, and the output is fed into a differential sensing circuit 32, and if the hitch angle exceeds a minor admissible angle of play with zero as center in the condition that the tractor 2 and trailer 5 are on a straight line, a signal corresponding to the amount of exceeding is fed into a calculator circuit 33. Now the calculator circuit 33 actuates a solenoid valve 34 for a hydraulic cylinder 21. and a steering operating mechanism 15 peforms swing of each wheel 12, 13.
|
