| 摘要 |
An apparatus (10) for turning steerable wheels (28, 124) of a vehicle (12) in response to input to a driver control interface (14) includes a sensor (18) for monitoring steering input to the driver control interface (14) and for providing a steering input signal indicative of the monitored steering input. Front and rear steering systems (24, 110 and 120, 126) are actuatable for turning front and rear sets of steerable wheels (28, 124), respectively. A controller (22), upon a malfunction of the front steering-system (24, 110), actuates only the rear steering system (120, 126) in response to the steering input signal.
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