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    • 1. 发明公开
    • COOLING FAN DRIVING DEVICE AND FAN ROTATION NUMBER CONTROL METHOD
    • 驱动装置,用于控制风扇速度的冷却风扇和方法
    • EP2412948A4
    • 2017-05-17
    • EP10755859
    • 2010-03-10
    • KOMATSU MFG CO LTD
    • IMAIZUMI MASAAKIWADA MINORU
    • F01P7/04F04B49/06F04D25/04F04D27/00F15B11/00
    • F04D13/12F01P7/044F04B49/002F04B49/065F04B49/20F04D25/04F04D25/08F04D25/16F15B11/042F15B2211/633
    • The invention provides a cooling fan driving device and the a fan rotational speed control method using the device capable of reducing uneconomical waste of flow volume of pressurized oil discharged from a hydraulic pump when the rotational speed of a cooling fan is increased to the target rotational speed. The target rotational speed of the cooling fan is set at a target rotational speed setting portion 22 of a controller 7 based on temperature of refrigerant and hydraulic oil and the rotational speed of an engine. An acceleration pattern for increasing the rotational speed of the cooling fan to the target rotational speed is set at an acceleration pattern setting portion 23 based on the rotational speed of the cooling fan, the target rotational speed set at the target rotational speed setting portion 22, and magnitude of force due to inertia of the cooling fan and the hydraulic motor which drives the cooling fan. The rotational speed command value calculation portion 24 performs control so that pressurized oil is supplied to the hydraulic motor at a flow rate required when the hydraulic motor is controlled to be accelerated based on the acceleration pattern. Thus, it is possible to reduce relief flow volume to be wasted without being consumed for the acceleration control of the hydraulic motor.
    • 本发明提供的冷却风扇驱动装置和所述使用能够减少从液压泵喷出的压力油的流量的不经济的废物的装置。当冷却风扇的旋转速度增大到目标旋转速度的风扇转速控制方法 , 所述冷却风扇的目标转速被设定为基于制冷剂的温度和液压油和发动机的转速的控制部7的目标转速设定部22。 对于冷却风扇的旋转速度增加至转速被设定为在加速模式设定基于所述冷却风扇的旋转速度部23的目标加速度模式,目标转速设定为目标转速设定部22, 和力的大小,由于冷却风扇的转动惯量和液压马达驱动的冷却风扇。 旋转速度指令值计算部分24执行控制,在需要时液压马达进行控制的流率,以便没有压力油供给到液压马达以基于加速模式被加速。 因此,能够减少溢流流体积而不被消耗的液压马达的加速控制被浪费。