公开(公告)号：US4587808A

公开(公告)日：1986-05-13

申请号：US363454

申请日：1982-03-30

申请人： Hiroshi Watanabe ,  Eiki Izumi ,  Yukio Aoyagi ,  Kazuo Honma ,  Kichio Nakajima

发明人： Hiroshi Watanabe ,  Eiki Izumi ,  Yukio Aoyagi ,  Kazuo Honma ,  Kichio Nakajima

IPC分类号： F04B49/06 ,  F15B9/04 ,  F15B21/08 ,  G05D3/14 ,  F16D31/02

CPC分类号： G05D3/1445 ,  F04B49/06 ,  F15B21/087 ,  F15B9/04 ,  Y10S388/929 ,  Y10S60/911

摘要： A control system for a hydraulic circuit having a variable displacement hydraulic pump, and an actuator driven by the pump, in which a pump control controls a displacement volume varying member of the pump based on an operating signal giving a command with respect to the position thereof and a detector signal indicative of the actual position thereof while restricting the operating speed of the member to a level below a predetermined maximum speed. The control system has maximum speed setting device previously setting a first predetermined maximum speed and a second predetermined maximum speed higher than the first predetermined maximum speed for the operating speed of the variable displacement volume varying member and operative to select the first predetermined maximum speed when the direction of operation of the actuator commanded by the operating signal agrees with the actual direction of operation thereof, and select the second predetermined maximum speed when the position of the displacement volume varying member commanded by the operating signal is neutral or when the direction of operation of the actuator commanded by the operating signal is opposite to the actual direction of operation thereof. The pump control is constructed to effect the speed control of the displacement volume varying member based on the first or second predetermined maximum speed selected by the maximum speed setting device.

摘要翻译： 一种用于具有可变排量液压泵的液压回路的控制系统和由泵驱动的致动器，其中泵控制器基于给出相对于其位置的命令的操作信号来控制泵的排量体积变化部件 以及指示其实际位置的检测器信号，同时将构件的操作速度限制在低于预定最大速度的水平。 所述控制系统具有预先为所述可变排量容积变化构件的操作速度设定高于所述第一预定最大速度的第一预定最大速度和第二预定最大速度的最大速度设定装置，并且当所述最大速度设定装置选择所述第一预定最大速度时， 由操作信号指示的致动器的操作方向与其实际操作方向一致，并且当由操作信号指令的位移容积变化构件的位置为中性或当操作方向的操作时，选择第二预定最大速度 由操作信号指令的致动器与实际操作方向相反。 泵控制被构造为基于由最大速度设定装置选择的第一或第二预定最大速度来实现排量体积变化构件的速度控制。

公开(公告)号：US4528813A

公开(公告)日：1985-07-16

申请号：US290110

申请日：1981-08-05

申请人： Eiki Izumi ,  Hiroshi Watanabe ,  Yukio Aoyagi ,  Kazuo Honma ,  Kichio Nakajima

发明人： Eiki Izumi ,  Hiroshi Watanabe ,  Yukio Aoyagi ,  Kazuo Honma ,  Kichio Nakajima

IPC分类号： G05D16/00 ,  F16H61/40 ,  F16H61/431 ,  F16H39/46

CPC分类号： F16H61/431 ,  F16H2059/683 ,  F16H2059/6853 ,  F16H2059/6861

摘要： A control system for a hydrostatic power transmission having a variable displacement hydraulic pump (2) and a hydraulic actuator (3) connected in a closed or semi-closed circuit, wherein the displacement of the pump or the delivery thereby is adjustable in accordance with a manipulated variable of an operating lever (13). A control unit of the system (16) is operative to calculate a hydraulic pump displacement command (X) on the basis of a manipulated variable signal (X.sub.L) and circuit pressure signals (Pa, Pb) in such a manner that when the delivery side circuit pressure is higher than the suction side circuit pressure, the displacement is controlled to change in accordance with the manipulated variable while the rate of change in the displacement is controlled to change a maximum rate when the circuit pressure on the delivery side is below a pressure value that varies in dependence on the manipulated variable and is reduced once it is reached, while pump displacement is changed in response to the suction side circuit pressure, when it is higher than the delivery side pressure, in a similar manner except that a constant value is used instead of a value which varies in dependence on the manipulated variable.

摘要翻译： 一种用于静液压动力传动的控制系统，其具有连接在闭合或半闭合回路中的可变排量液压泵（2）和液压致动器（3），其中泵或其输送的位移可根据 操作杆（13）的操纵变量。 系统（16）的控制单元可操作以基于操纵可变信号（XL）和电路压力信号（Pa，Pb）计算液压泵排量指令（X），使得当输送侧 回路压力高于吸入侧回路压力，根据操作变量控制位移变化，同时当输送侧的回路压力低于压力时控制位移变化率以改变最大速率 值根据操作变量而变化，并且一旦达到就减小，而泵位移响应于吸入侧回路压力而变化，当其高于输送侧压力时，除了使用恒定值 而不是根据操纵变量而变化的值。

公开(公告)号：US4586330A

公开(公告)日：1986-05-06

申请号：US401304

申请日：1982-07-23

申请人： Hiroshi Watanabe ,  Eiki Izumi ,  Yukio Aoyagi ,  Kazuo Honma ,  Kichio Nakajima

发明人： Hiroshi Watanabe ,  Eiki Izumi ,  Yukio Aoyagi ,  Kazuo Honma ,  Kichio Nakajima

IPC分类号： F15B11/16 ,  E02F9/20 ,  E02F9/22 ,  F15B11/17 ,  F15B21/08

CPC分类号： F15B11/17 ,  E02F9/2221 ,  E02F9/2296 ,  F15B21/087 ,  F15B2211/20546 ,  F15B2211/20561 ,  F15B2211/27 ,  F15B2211/30515 ,  F15B2211/30595 ,  F15B2211/6333 ,  F15B2211/6652 ,  F15B2211/6654 ,  F15B2211/71

摘要： A control system for a hydraulic circuit including at least first and second variable displacement volume type hydraulic pumps, at least first and second hydraulic actuators driven by the pumps, and valves for controlling hydraulic connections between the pumps and the actuators. The control system includes a device for deciding the order of priority of hydraulic connections between the first actuator and the first and second hydraulic pumps and the order of priority of hydraulic connections between the second pump and the first and second actuators. A first sensor is provided for sensing maximization of the displacement volume of the first pump, sensing that the displacement volume of the second pump has become substantially zero. A device decides target displacement volumes of the first and second pumps based on information supplied at least by the priority order deciding device and first and second sensor. When the flow rate of hydraulic fluid supplied to the first actuator is increased, the displacement volume of the second pump is increased from substantially zero after the displacement volume of the first pump is maximized. When the flow rate of hydraulic fluid supplied to the first actuator is reduced, the displacement volume of the first pump is reduced after the displacement volume of the second pump has become substantially zero.

摘要翻译： 一种用于液压回路的控制系统，包括至少第一和第二可变容量型液压泵，由泵驱动的至少第一和第二液压致动器以及用于控制泵和致动器之间的液压连接的阀。 控制系统包括用于确定第一致动器和第一和第二液压泵之间的液压连接的优先顺序的装置以及第二泵与第一和第二致动器之间的液压连接的优先顺序。 提供第一传感器用于感测第一泵的排量的最大化，感测到第二泵的排量已经变得基本上为零。 设备基于至少由优先顺序决定装置和第一和第二传感器提供的信息来确定第一和第二泵的目标排量。 当提供给第一致动器的液压流体的流量增加时，在第一泵的移动容积最大化之后，第二泵的排出容积从基本上为零增加。 当提供给第一致动器的液压流体的流量减小时，在第二泵的排量已经变为基本为零之后，第一泵的排出容积减小。

公开(公告)号：US4520626A

公开(公告)日：1985-06-04

申请号：US337283

申请日：1982-01-05

申请人： Kichio Nakajima ,  Eiki Izumi ,  Hiroshi Watanabe ,  Yukio Aoyagi ,  Kazuo Honma

发明人： Kichio Nakajima ,  Eiki Izumi ,  Hiroshi Watanabe ,  Yukio Aoyagi ,  Kazuo Honma

IPC分类号： F15B11/00 ,  F15B7/10 ,  F15B11/08 ,  F16K11/07 ,  F16D31/02

CPC分类号： F15B7/10 ,  F15B2211/5059

摘要： A hydraulic drive system including a main line, a variable displacement hydraulic pump and another main line connected to a single rod cylinder in a closed hydraulic circuit, and a flushing valve having a first switching position in which one main line is communicated with a low pressure line and a second switching position in which the other main line is communicated with the low pressure line. The flushing valve is operative to maintain at least one of the two main lines in communication with the low pressure line at all times while moving from one switching position to the other switching position, to keep a lock-up phenomenon from taking place in the closed hydraulic circuit. The system further includes a pressure generating device for generating between the two main lines a pressure differential necessary for effecting switching of the flushing valve.

摘要翻译： 一种液压驱动系统，包括主线，可变排量液压泵和在闭合液压回路中连接到单杆气缸的另一主线，以及具有第一切换位置的冲洗阀，其中一条主线与低压连通 线路和第二切换位置，其中另一主线路与低压线路连通。 冲洗阀可操作以在从一个切换位置移动到另一个切换位置时始终保持两条主线中的至少一条与低压管线连通，以保持闭合状态下的锁定现象 液压回路。 该系统还包括用于在两条主线之间产生用于实现冲洗阀切换所需的压力差的压力产生装置。

公开(公告)号：US4451893A

公开(公告)日：1984-05-29

申请号：US311969

申请日：1981-10-16

申请人： Eiki Izumi ,  Hiroshi Watanabe ,  Yukio Aoyagi ,  Kazuo Honma ,  Kichio Nakajima

发明人： Eiki Izumi ,  Hiroshi Watanabe ,  Yukio Aoyagi ,  Kazuo Honma ,  Kichio Nakajima

IPC分类号： F16H61/40 ,  F16H61/4008 ,  F16H61/433 ,  G06F15/46

CPC分类号： F16H61/475 ,  F16H61/433 ,  F16H61/46

摘要： A control method and a control system for a hydrostatic drive system including a variable displacement hydraulic pump and a hydraulic actuator connected together to form a closed hydraulic fluid circuit. When the flow rate of the hydraulic pump is increased, the rate of change in the tilt of the hydraulic pump is controlled so that the discharge pressure does not exceed a first set of preset values with respect to the flow rate of the pump, meanwhile when the flow rate of the pump is reduced, the rate of change in the tilt of the hydraulic pump is controlled so that the suction pressure does not exceed a second set of preset values with respect to the flow rate of the pump.

摘要翻译： 一种用于静液压驱动系统的控制方法和控制系统，包括可变排量液压泵和连接在一起的液压致动器，以形成闭合的液压流体回路。 当液压泵的流量增加时，控制液压泵的倾斜变化率，使得排出压力相对于泵的流量不超过第一组预设值，同时当 泵的流量减小，控制液压泵的倾斜变化率，使得吸入压力相对于泵的流量不超过第二组预设值。

公开(公告)号：US4395199A

公开(公告)日：1983-07-26

申请号：US276367

申请日：1981-06-15

申请人： Eiki Izumi ,  Hiroshi Watanabe ,  Yukio Aoyagi ,  Kazuo Honma ,  Kichio Nakajima

发明人： Eiki Izumi ,  Hiroshi Watanabe ,  Yukio Aoyagi ,  Kazuo Honma ,  Kichio Nakajima

IPC分类号： B60W10/06 ,  B60W30/18 ,  E02F9/22 ,  F02B63/06 ,  F02D29/04 ,  F02D41/24 ,  F02D45/00 ,  F02M31/04 ,  F04B49/00

CPC分类号： B60W10/06 ,  B60W10/04 ,  B60W10/103 ,  B60W30/18 ,  E02F9/2235 ,  E02F9/2246 ,  E02F9/2292 ,  E02F9/2296 ,  F02D29/04 ,  F02D41/24

摘要： A control method of a system for generating hydraulic power, the system including an internal combustion engine controlled by fuel injection from a fuel injection pump, and a plurality of hydraulic pumps of the variable displacement type. An engine speed deviation is obtained by calculating a difference between a target engine speed set by a manipulated variable of an accelerator for the internal combustion engine and an output engine speed of the engine. The engine speed deviation is converted into a pump control coefficient which is in a functional relation with this deviation. A calculation is performed with the converted value and an externally manipulated variable for inclination of a swash plate of the hydraulic pump, and the calculated value is supplied to a regulator of the hydraulic pump as a target value for inclination of the swash plate thereof to thereby control the inclination angle of the swash plate of the hydraulic pump. At the same time, the engine speed deviation is converted into a rack displacement target value which is a functional relation with this deviation, and the rack displacement of the fuel injection pump is adjusted by the converted value to thereby control the amount of fuel injection.

摘要翻译： PCT No.PCT / JP80 / 00247 Sec。 371日期：1981年6月15日 102（e）日期1981年6月15日PCT提交1980年10月14日PCT公布。 出版物WO81 / 01031 日期：1981年04月16日。一种用于产生液压动力的系统的控制方法，该系统包括通过燃料喷射泵的燃料喷射控制的内燃机和可变排量型的多个液压泵。 通过计算由内燃机的加速器的操作变量和发动机的输出发动机转速设定的目标发动机转速之间的差来获得发动机转速偏差。 发动机转速偏差转换为与该偏差成功函数关系的泵控制系数。 利用转换后的值和液压泵的斜盘倾斜的外部操作量进行计算，将计算出的值作为液压泵的调节器作为倾斜斜盘的目标值 控制液压泵旋转斜盘的倾斜角度。 同时，将发动机转速偏差转换为与该偏差成功函数关系的齿条位移目标值，并且通过转换值调节燃料喷射泵的齿条位移，从而控制燃料喷射量。

公开(公告)号：US5155996A

公开(公告)日：1992-10-20

申请号：US566466

申请日：1990-08-20

申请人： Akira Tatsumi ,  Toichi Hirata ,  Masakazu Haga ,  Eiki Izumi

发明人： Akira Tatsumi ,  Toichi Hirata ,  Masakazu Haga ,  Eiki Izumi

IPC分类号： E02F9/22

CPC分类号： F16H61/4078 ,  E02F9/2235 ,  E02F9/2246 ,  E02F9/2296 ,  F16H61/433 ,  B60W10/06 ,  F15B2211/20553 ,  F15B2211/253 ,  F15B2211/50536 ,  F16H2059/6846

摘要： A hydraulic drive system for a construction machine comprising a prime mover (1), a hydraulic pump (2) of variable displacement type driven by the prime mover, at least one hydraulic actuator (6) driven by a hydraulic fluid delivered from the hydraulic pump, control valves connected between the hydraulic pump and the actuator for controlling a flow rate of the hydraulic fluid supplied to the actuator dependent on the operation amount of control apparatus, pump control apparatus for controlling a displacement volume of the hydraulic pump dependent on the operation amount of the control apparatus such that the delivery rate of the hydraulic pump is increased with an increase in the operation amount, and prime mover control apparatus (29) for controlling a revolution speed of the prime mover. The prime mover control apparatus (29) has a function (33, 36) to monitor saturation of the delivery rate of the hydraulic pump (2), and to raise up the revolution speed of the prime mover (1) to prevent the pump from the saturation when the hydraulic pump reaches a predetermined state concerned with the saturation.

公开(公告)号：US4945723A

公开(公告)日：1990-08-07

申请号：US213179

申请日：1988-06-29

申请人： Eiki Izumi ,  Toichi Hirata ,  Yusaku Nozawa ,  Masahiko Shimotori

发明人： Eiki Izumi ,  Toichi Hirata ,  Yusaku Nozawa ,  Masahiko Shimotori

IPC分类号： E02F9/22 ,  F15B11/16 ,  F15B11/20 ,  F15B13/04 ,  F15B13/06

CPC分类号： F15B13/0405 ,  E02F9/2225 ,  E02F9/2232 ,  Y10T137/87193

摘要： A hydraulic drive system has first and second flow control valves. Each of the control valves has a main valve of the seat valve type with a valve body for controlling communication between an inlet port and an outlet port which are both connected to a main circuit. Each further have a variable restrictor capable of changing an opening degree thereof in response to displacements of the valve body, and a back pressure chamber communcating with the inlet port through the variable restrictor and producing a control pressure to urge the valve body in the valve-closing direction. A pilot valve is connected to a pilot circuit which is connected between the back pressure chamber and the outlet port of the main valve; and an auxiliary valve is connected to the pilot circuit for controlling a differential pressure between the inlet pressure and the outlet pressure of the pilot valve. The auxiliary valve is controlled such that the differential pressure between the inlet pressure and the outlet pressure of the pilot valve has a relationship expressed by a certain equation including constants .alpha., .beta. and .gamma., with respect to a differential pressure between the delivery pressure of a hydraulic pump and the maximum load pressure of the first and second hydraulic actuators, a differential pressure between that maximum load pressure and the self-load pressure of each of the hydraulic actuators, and the self-load pressure, wherein the constants .alpha., .beta. and .gamma. are set to respective predetermined values.

公开(公告)号：US4571941A

公开(公告)日：1986-02-25

申请号：US333555

申请日：1981-12-22

申请人： Yukio Aoyagi ,  Eiki Izumi ,  Sotaro Tanaka ,  Takeshi Yamaguchi

发明人： Yukio Aoyagi ,  Eiki Izumi ,  Sotaro Tanaka ,  Takeshi Yamaguchi

IPC分类号： E02F9/12 ,  F16H61/40 ,  F16H61/4157 ,  F16H61/42 ,  F16H61/433 ,  F16H39/46

CPC分类号： F16H61/4157 ,  E02F9/123 ,  F16H61/433

摘要： A hydraulic power system having a variable displacement hydraulic pump, a hydraulic motor driven by the hydraulic pump for actuating a load, with the pump and motor being connected to constitute a closed hydraulic circuit. A hydraulic servo controls the displacement volume of the pump, and a motor stop arrangement prevents, in its operative position, the motor from rotating. The system includes a control valve responsive to a main line pressure in the closed hydraulic circuit for controlling a hydraulic fluid supply to the hydraulic servo to prevent the main line pressure from substantially exceeding a predetermined level, and a control is responsive to the operation of the hydraulic servo for releasing the motor stop arrangement from the operative position when the hydraulic servo is operating.

摘要翻译： 具有可变排量液压泵的液压动力系统，由用于致动负载的液压泵驱动的液压马达，泵和马达被连接以构成闭合​​的液压回路。 液压伺服机构控制泵的排量，马达停止装置在其工作位置防止电动机旋转。 该系统包括响应于闭合液压回路中的主管路压力的控制阀，用于控制向液压伺服机构供给的液压流体，以防止主管路压力基本上超过预定水平，并且控制响应于 液压伺服机构，用于在液压伺服机构运转时将电机停止装置从工作位置释放。

公开(公告)号：US4561250A

公开(公告)日：1985-12-31

申请号：US346249

申请日：1982-02-05

申请人： Yukio Aoyagi ,  Eiki Izumi ,  Takeshi Yamaguchi ,  Sotaro Tanaka

发明人： Yukio Aoyagi ,  Eiki Izumi ,  Takeshi Yamaguchi ,  Sotaro Tanaka

IPC分类号： E02F9/12 ,  F16H61/40 ,  F16H61/4078 ,  F16H61/42 ,  F16H61/433 ,  F16H61/444 ,  F15B11/16

CPC分类号： F16H61/444 ,  E02F9/123 ,  F16H61/40 ,  F16H61/4078 ,  F16H61/433 ,  F16H2059/6861

摘要： A hydraulic drive system including at least one hydraulic actuator, two variable displacement hydraulic pumps each connected to the hydraulic actuator to form a closed circuit therewith and connected in parallel with each other, two prime movers each driving one of the hydraulic pumps, and directional control valves each arranged between the hydraulic actuators and one of the hydraulic pumps. The directional control valves are each operative to shut, when one of the prime movers associated therewith is shut down, the hydraulic pump connected to the shutdown prime mover off the other hydraulic pump and the hydraulic actuator, to thereby prevent the hydraulic pump from being rotated by the pressure fluid delivered by the other hydraulic pump.

摘要翻译： 一种液压驱动系统，包括至少一个液压致动器，两个可变排量液压泵，每个液压致动器均连接到液压致动器以与其形成闭合回路并彼此并联连接，两个驱动一个液压泵的原动机，以及方向控制 每个阀布置在液压执行器和其中一个液压泵之间。 当与其关联的原动机中的一个被关闭时，方向控制阀各自关闭，液压泵连接到关闭原动机，离开另一个液压泵和液压致动器，从而防止液压泵旋转 通过由另一液压泵输送的压力流体。