| 摘要 |
<p>PROBLEM TO BE SOLVED: To give a driver information properly and surely on steering operation of steering wheels by automatic steering via a steering wheel. SOLUTION: This automatic steering device for a vehicle has a gear ratio variable device 23 as a relationship variable means for changing the relationship between a turning angle of the steering wheel 14 and a variation of an actual steering angle of the dirigible road wheels, and automatically steers the dirigible road wheels by a power unit 28 so that the actual steering angle becomes the desired relationship to a target steering angle by setting the target steering angle of the dirigible road wheels, and controls the gear ratio variable device 23 so that the ratio of the variation of the actual steering angle to the turning angle of the steering wheel becomes the desired ratio at nonautomatic steering time, and controls the gear ratio variable device 23 so that the ratio of the turning angle of the steering wheel to the variation of the actual steering angle becomes the desired ratio at automatic steering time.</p> |
