| 摘要 |
PROBLEM TO BE SOLVED: To provide an oil-hydraulic circuit of a work vehicle in which efficiency is improved to be favorable for driving a cooling-fan and working equipment. SOLUTION: The oil-hydraulic circuit includes an working-equipment actuator, a cooling fan-driving actuator, a variable displacement hydraulic-pump for supplying pressure oil to both of the working-equipment actuator and the cooling fan-driving actuator, and a controller for controlling a flow rate of the pressure-oil of the working-equipment actuator and a flow rate of the pressure-oil of the cooling fan-driving actuator. If the maximum delivery of the variable displacement hydraulic-pump is less than the sum total of the maximum flow-rate required for driving the working equipment, and the maximum flow-rate required for driving the cooling fan, and if the delivery of the hydraulic pump is less than the sum total of the flow-rate required for driving the working-equipment and the flow-rate required for driving the cooling fan, the controller exercises so that the flow-rate required for the working equipment takes priority, and the rest of the delivery is supplied for driving the cooling fan. COPYRIGHT: (C)2006,JPO&NCIPI
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