| 摘要 |
In an automotive vehicle having a four-wheel steering system in which, at least in the low and medium vehicle speed range, the rear wheels are steered in the reverse-phase direction relative to the front wheels in accordance with the steering force or steering angle of the front wheels and with the front-wheel steering speed. The method comprises the steps of deciding at low and medium vehicle speeds, a rear-wheel steering speed reference value determined in dependence on the front-wheel steering speed, increasing the reverse-phase direction steering speed of the rear wheels for low front-wheel steering speeds, and reducing the reverse-phase direction steering speed of the rear wheels for high front wheel steering speeds. The reference value of the rear-wheel steering speed in a large range of the front-wheel steering speed is controlled to be zero or to be in the coincident-phase direction. The reference value is also varied in the direction for reducing the degree of the reverse-phase direction as the vehicle speed increases, with the vehicle speed as a parameter.
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