| 摘要 |
PROBLEM TO BE SOLVED: To provide a traveling control device of a tractor can move a machine body while securing safe handling of a vehicle according to degree of abnormality even when sensor abnormality of a traveling control system occurs. SOLUTION: The continuously variable transmission controlling device of the work vehicle is provided with a transmission control part 5 for adjusting a trunnion position in a target operation position by a trunnion position sensor 7s regarding a trunnion 8a for adjusting a vehicle speed by a continuously variable transmission 8 having an operation range from a neutral position to an advancing/retreating full speed position. The transmission control part 5 outputs warning in an alarm mode which is different from the case when a neutral position detection value is out of the prescribed range when the neutral position detection value is in the prescribed range from the neutral position reference value in the case of full speed position abnormality where a full speed position detection value output by the position sensor 7s is out of the proper range separately set, with respect to a neutral position reference value and an advancing/retreating full speed position reference value set for the position sensor 7s, in response to the neutral position and the advancing/retreating full speed position of the trunnion 8a. COPYRIGHT: (C)2010,JPO&INPIT
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