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    • 74. 发明授权
    • Control apparatus and control method for hydraulically driven cooling fan
    • 液压驱动冷却风扇的控制装置及控制方法
    • US07856951B2
    • 2010-12-28
    • US11922835
    • 2006-07-06
    • Mitsuhiko KamadoShigeru YamamotoTomohiro Nakagawa
    • Mitsuhiko KamadoShigeru YamamotoTomohiro Nakagawa
    • F01P7/10
    • F01P7/044F01P5/043
    • An invention relating to a control apparatus and a control method for a hydraulically driven cooling fan for reducing the peak pressure produced upon reversing the switch position of a switching valve, without stopping an engine, and without greatly modifying existing hydraulic circuitry or increasing the apparatus cost. In the invention, in the case that a reversing switch has been operated so as to output a reversal processing commencement instruction signal, control is carried out such that, under the condition that the rotational speed of the engine has decreased to not more than a stipulated rotational speed, capacity adjusting means is controlled, so as to reduce the capacity of a hydraulic pump, and thus reduce the fan rotational speed, and then the switch position of the switching valve is reversed.
    • 一种用于液压驱动的冷却风扇的控制装置和控制方法的发明,用于在不停止发动机的情况下减少在切换阀的开关位置反转时产生的峰值压力,并且不会大大改变现有的液压回路或增加设备成本 。 在本发明中,在反转开关被操作以输出反转处理开始指示信号的情况下,进行控制,使得在发动机的转速降低到规定值以下的条件下 旋转速度,容量调节装置被控制,以便降低液压泵的容量,从而降低风扇转速,然后切换阀的开关位置反转。