公开(公告)号：US5352095A

公开(公告)日：1994-10-04

申请号：US997513

申请日：1992-12-28

申请人： Masayuki Tanaka ,  Isao Murota ,  Kazuhito Nakai ,  Makoto Iga

发明人： Masayuki Tanaka ,  Isao Murota ,  Kazuhito Nakai ,  Makoto Iga

IPC分类号： E02F9/22 ,  F02D29/04 ,  F02D45/00 ,  F04B1/26 ,  F04B49/00 ,  F04B49/06 ,  F15B21/04

CPC分类号： E02F9/2296 ,  E02F9/2246 ,  E02F9/226 ,  F02D29/04 ,  F04B49/065 ,  F15B21/045 ,  F04B2205/11

摘要： A method for controlling a hydraulic pump driven by an engine, including measuring a temperature of at least one of the engine and a hydraulic fluid, comparing the measured temperature with a first predetermined temperature to judge as to whether the measured temperature is higher than the first predetermined temperature or not, comparing the measured temperature with a second predetermined temperature to calculate a difference between the measured temperature and the second predetermined temperature, and decreasing an output flow rate of the hydraulic pump by a degree according to the difference between the measured temperature and the second predetermined temperature, when the measured temperature is judged to be higher than the first predetermined temperature.

摘要翻译： 一种用于控制由发动机驱动的液压泵的方法，包括测量发动机和液压流体中的至少一个的温度，将测量的温度与第一预定温度进行比较，以判断测量的温度是否高于第一 将测量温度与第二预定温度进行比较，以计算测量温度和第二预定温度之间的差，并且将液压泵的输出流量按照测量温度和 当所述测量温度被判断为高于所述第一预定温度时，所述第二预定温度。

公开(公告)号：US5266010A

公开(公告)日：1993-11-30

申请号：US997883

申请日：1992-12-29

申请人： Masayuki Tanaka ,  Isao Murota ,  Kazuhito Nakai ,  Makoto Iga

发明人： Masayuki Tanaka ,  Isao Murota ,  Kazuhito Nakai ,  Makoto Iga

IPC分类号： F02D29/00 ,  F02D29/04 ,  F04B49/06 ,  F04B49/10 ,  F15B21/00 ,  F15B21/04 ,  F04B47/06

CPC分类号： F15B21/045 ,  F02D29/04 ,  F04B49/065 ,  F04B49/10 ,  F04B2207/03

摘要： A method for controlling a hydraulic pump included by an apparatus, comprises the steps of: measuring a circumferential atmospheric temperature of the apparatus, comparing the measured circumferential atmospheric temperature with a first temperature to judge as to whether the measured circumferential atmospheric temperature is higher than the first temperature or not, and decreasing an output of the hydraulic pump when the measured circumferential atmospheric temperature is judged to be higher than the first temperature.

公开(公告)号：US06758128B2

公开(公告)日：2004-07-06

申请号：US10181154

申请日：2002-07-16

申请人： Makoto Iga ,  Yoshiyuki Shimada

发明人： Makoto Iga ,  Yoshiyuki Shimada

IPC分类号： F15B1108

CPC分类号： E02F9/2203 ,  E02F9/2225 ,  E02F9/2285 ,  F15B11/166 ,  F15B13/042 ,  F15B13/0426 ,  F15B21/082 ,  F15B2211/3116 ,  F15B2211/329 ,  F15B2211/36 ,  F15B2211/50563 ,  F15B2211/575 ,  F15B2211/6355 ,  F15B2211/71 ,  F15B2211/75

摘要： An oil hydraulic circuit having a pilot operated control valve, for performing control of pressure oil supply to a hydraulic actuator and a pilot valve gear for outputting a pilot pressure to the control valve, that improves operationality when a fine operation is performed. The pilot valve gear has a first pressure controller that outputs a pilot pressure corresponding to the degree of operation of an operating lever and a second pressure controller that reduces the pilot pressure outputted from the first pressure controller based on a signal from an operating speed changeover switch and outputs the reduced pilot pressure to the control valve.

摘要翻译： 一种具有先导操作控制阀的油压回路，用于执行对液压致动器的压力油的控制，以及用于向控制阀输出先导压力的先导阀齿轮，从而提高精细操作时的操作性。 先导阀齿轮具有第一压力控制器，其输出对应于操作杆的操作程度的先导压力和第二压力控制器，所述第二压力控制器基于来自操作速度切换开关的信号降低从第一压力控制器输出的先导压力 并将减少的先导压力输出到控制阀。

公开(公告)号：US06241482B1

公开(公告)日：2001-06-05

申请号：US09162445

申请日：1998-09-29

申请人： Makoto Iga

发明人： Makoto Iga

IPC分类号： F04B126

CPC分类号： E02F9/2292 ,  E02F9/2235 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2296 ,  F15B11/16 ,  F15B21/042 ,  F15B2211/20584 ,  F15B2211/3116 ,  F15B2211/62 ,  F15B2211/6355 ,  F15B2211/67 ,  F15B2211/71

摘要： A hydraulic pilot circuit having a pilot pump which discharges pilot oil, and a plurality of pilot valves which control a plurality of hydraulic directional control valves by supplying the pilot oil with control, wherein heating of hydraulic oil due to retaining pilot pressure oil is reduced, and controllability is not damaged even if the plurality of pilot valves are operated at the same time, because sufficient pilot oil is supplied to the pilot valves. A variable displacement pump is adopted as the pilot pump. An operation detecting means detects operating condition of the hydraulic pilot valves, a controller computes the necessary discharge of the pilot pump for operating the hydraulic directional control valves from the operating condition, and the pilot pump discharges only the necessary oil flow.

摘要翻译： 具有排出先导油的先导泵的液压先导回路和通过向先导油供给控制来控制多个液压方向控制阀的多个先导阀，其中减少由于保持先导压力油而导致的液压油的加热， 并且由于向先导阀供给充足的先导油，所以即使同时操作多个先导阀，也不会损坏可控制性。采用可变排量泵作为先导泵。 操作检测装置检测液压先导阀的运行状况，控制器从运行状态计算用于操作液压方向控制阀的先导泵的必要排放，而先导泵只排出必要的油流。

公开(公告)号：US5198800A

公开(公告)日：1993-03-30

申请号：US716526

申请日：1991-06-17

申请人： Shoji Tozawa ,  Saburo Tanaka ,  Makoto Iga

发明人： Shoji Tozawa ,  Saburo Tanaka ,  Makoto Iga

IPC分类号： E02F3/43 ,  E02F9/20 ,  E02F9/24 ,  E02F9/26

CPC分类号： E02F9/24 ,  E02F9/2033

摘要： An excavator includes an upper structure swingably supported by a lower structure. A worker position sensor consists of a plurality of radio frequency transceivers provided in the excavator and a radio frequency transceiver carried by each of the excavation workers working within the working range of the excavator. A signal processing unit determines whether the relative distance between each worker and the excavator is either of short distance, slightly long distance or long distance and identifies the position of each worker for each of the predetermined identifying areas. A determining signal from the signal processing unit is supplied to a control unit. The control unit is connected to a drive unit which includes electro-hydraulic proportional valves for energizing actuators for positioning, swing, and traveling of the excavator. This control unit is also connected to a machine sensor which includes a swing angle sensor, a traveling level sensor, and a swing operation lever sensor. The control unit determines whether the machine is moved to approach the workers. The control unit controls the machine so that the lower structure stops or travels slowly or the upper structure swings slowly when the machine is approaching the workers and, so that the movement of the machine remains unchanged when it is moved away from the workers.

摘要翻译： 挖掘机包括由下部结构可摆动地支撑的上部结构。 工作位置传感器由设置在挖掘机中的多个射频收发器和由在挖掘机的工作范围内工作的每个挖掘工作者承载的射频收发器组成。 信号处理单元确定每个工人和挖掘机之间的相对距离是距离短距离还是长距离长距离，并且识别每个工作人员对于每个预定识别区域的位置。 来自信号处理单元的确定信号被提供给控制单元。 控制单元连接到驱动单元，该驱动单元包括用于对用于定位，摆动和行进的挖掘机的致动器的电液比例阀。 该控制单元还连接到包括摆角传感器，行驶级传感器和摆动操作杆传感器的机器传感器。 控制单元确定机器是否被移动以接近工人。 控制单元控制机器，使得下部结构停止或行进缓慢，或者当机器接近工人时，上部结构缓慢地摆动，从而当机器移动离开工人时机器的运动保持不变。