| 摘要 |
A vehicle (10) includes a steering system (25) for moving a pair of wheels (14a,14b) supported by wheel support structure (S) the system (25) including a pressure source (29) for providing a supply of pressurised fluid to first and second steering valves (28a,28b), and first and second fluid operated actuators (26a,26b) each of which includes an actuating member (44a,44b), the steering valves (28a,28b) each being operator controlled to provide the pressurised fluid, at least when the steering system is in a first operating mode, from the first steering valve (28a) to the first fluid operated actuator (26a) and from the second steering valve (28b) to the second fluid operated actuator (26b) to achieve steering, and when the steering system (25) is operating in a second operating mode, only one of the first and second steering valves (28a;28b) is providing pressurised fluid from the pressure source (29) to its respective fluid operated actuator (26a,26b) to achieve steering.
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