| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a tractor which suppresses deterioration in finishing of a field surface when vehicle speed is suddenly changed during tilting work or when the tilting work of a headland is started. <P>SOLUTION: The tractor 1 for performing the tilting work with a plowing depth control that follows a target plowing depth in which a plowing depth is previously set by lifting the rotary tilting device 30 limits the rotary tilting device 30 from lifting by the plowing depth control until a specified distance A or a specified time B has passed when the vehicle speed is changed for not less than a specified value. In detail, the rotary tilting device 30 is prohibited from lifting, the gain of the plowing depth control is reduced, a dead zone of the plowing depth control is enlarged, or the target plowing depth of the plowing depth control is corrected to the plowing depth side. <P>COPYRIGHT: (C)2012,JPO&INPIT |
