| 摘要 |
A system for steering at least one unpowered wheeled tag axle of a vehicle which in the latter's ordinary direction of movement follows the vehicle's front axle comprises an ancillary unit (29) adapted, if the vehicle's speed is below a threshold speed when a malfunction of the system occurs, to switching the system to a first fail-safe state with caster steering of the tag axle, but if the vehicle is above the threshold speed when a malfunction of the system occurs, to keeping the tag axle locked with its wheels in a fixed neutral position aligned with the vehicle's longitudinal direction in a second fail-safe state of the system. |
