| 摘要 |
PROBLEM TO BE SOLVED: To provide a posture control device of an agricultural working vehicle capable of performing a posture changing operation of a machine main body in an extremely stable state, even when rotational speed of an engine becomes low and flow rate suppliable by a hydraulic pump is reduced. SOLUTION: Driving conditions of a plurality of hydraulic cylinders C2 to C5 are determined in a form that a cylinder to be driven is selected from the hydraulic cylinders C2 to C5 so that the deviation of a front and rear inclined angle of the machine main body V from a target front and rear inclined angle and the deviation of a left and right inclined angle of the machine main body V from a target left and right inclined angle may be simultaneously reduced, and in a form that target flow rate of hydraulic fluid is determined so that total required flow rate of flow rate of hydraulic fluid to be supplied to the selected plurality of hydraulic cylinders C2 to C5 may not exceed flow rate suppliable by the hydraulic pump. Driving operations are performed for the selected plurality of hydraulic cylinders C2 to C5 by supplying hydraulic fluid at the target flow rate determined for each of the hydraulic cylinders C2 to C5. COPYRIGHT: (C)2006,JPO&NCIPI
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