| 摘要 |
A steering system ( 10 ) for a motor vehicle comprising a steerable wheel ( 12 ) defining a steering angle ( 20 ), a powered actuator ( 14 ) controlling the steering angle ( 20 ) and a steering wheel ( 16 ) providing a driver input control angle. The ratio of the driver input control angle to the steering angle ( 20 ) defines a steering ratio. The steering system ( 10 ) also includes a controller ( 18 ) selectively varying the steering ratio based, at least in part, upon road conditions.
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