| 摘要 |
PROBLEM TO BE SOLVED: To provide a working vehicle travel control device inhibiting a great load from being applied on an engine in an accurate manner while avoiding the insufficiency of driving force for traveling. SOLUTION: The working vehicle travel control device includes a control means 79 for controlling the actuation of an operating force adjusting means 48, the operating force adjusting means 48 being provided for changing and adjusting the operating force of a holding means 46, the holding means 46 being provided for holding an operation part 7Ma from moving from a set target position to a low-speed side with the operating force to move it to a high-speed side, the operation part 7Ma being provided for changing the capacity of a variable capacity hydraulic motor 7M for a travel hydrostatic continuously variable transmission 7 to which the power of the engine is transmitted. The control means 79 controls the operation part 7Ma to be kept at the set target position in accordance with information detected by a position detecting means 89 for detecting the position of the operation part 7Ma, while prohibiting the operating force of the holding means 46 from being increased over a set upper limit value even when the operation part 7Ma is moved to the low-speed side beyond the set target position and lowering the set upper limit value when the operation part 7Ma is moved to the low-speed side beyond the set target position. COPYRIGHT: (C)2010,JPO&INPIT
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