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    Control system for hydraulic pump
    3.
    发明授权
    Control system for hydraulic pump 失效
    液压泵控制系统

    公开(公告)号：US5170625A

    公开(公告)日：1992-12-15

    申请号：US601798

    申请日：1990-10-31

    申请人： Hiroshi Watanabe ,  Eiki Izumi ,  Yasuo Tanaka ,  Hiroshi Onoue ,  Shigetaka Nakamura

    发明人： Hiroshi Watanabe ,  Eiki Izumi ,  Yasuo Tanaka ,  Hiroshi Onoue ,  Shigetaka Nakamura

    IPC分类号： E02F9/22 ,  F04B49/06 ,  F15B11/16 ,  F15B21/08

    CPC分类号： F15B21/087 ,  E02F9/2235 ,  E02F9/2296 ,  F04B49/065 ,  F15B11/165 ,  F04B2205/05 ,  F04B2207/042 ,  F15B2211/20553 ,  F15B2211/253 ,  F15B2211/3051 ,  F15B2211/30535 ,  F15B2211/31576 ,  F15B2211/324 ,  F15B2211/6054 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/6333 ,  F15B2211/6346 ,  F15B2211/6355 ,  F15B2211/6652 ,  F15B2211/7053 ,  F15B2211/71

    摘要： A control system for a hydraulic pump in a hydraulic drive circuit includes at least one hydraulic pump whose displacement volume is variable, at least one hydraulic actuator driven by a hydraulic fluid delivered from the hydraulic pump, and a flow control valve connected between the hydraulic pump and the actuator for controlling a flow rate of the hydraulic fluid supplied to the actuator. In the control system, the target value of the differential pressure between the delivery pressure of the hydraulic pump and the load pressure of the actuator is preset, and the displacement volume is varied dependent on the deviation between the differential pressure and its target value for controlling a pump delivery rate so that the differential pressure is held at the target value. The control system further influences the change rate of the delivery pressure of the hydraulic pump with respect to the change in the displacement volume of the hydraulic pump, and determines a control gain (Ki) for the change rate of the displacement volume from the received value; and controls the displacement volume of the hydraulic pump in accordance with the control gain and the differential pressure deviation.

    摘要翻译： PCT No.PCT / JP90 / 00962 Sec。 371 1990年10月31日第 102（e）1990年10月31日PCT PCT 1990年7月27日PCT公布。 公开号WO91 / 02167 日本1991年2月21日。液压驱动电路中的液压泵的控制系统包括至少一个液压泵，其排量可变，由液压泵输送的液压流体驱动的至少一个液压致动器， 控制阀连接在液压泵和致动器之间，用于控制供应到致动器的液压流体的流量。 在控制系统中，预先设定液压泵的输出压力与执行机构的负荷压力之间的压力差的目标值，并根据差压与其控制目标值之间的偏差来改变排量 泵输送速率使得压差保持在目标值。 控制系统进一步影响液压泵的输送压力相对于液压泵的排量的变化的变化率，并根据接收值确定排量的变化率的控制增益（Ki） ; 并根据控制增益和差压偏差来控制液压泵的排量。

    Control system for controlling input power to variable displacement hydraulic pumps of a hydraulic system
    6.
    发明授权
    Control system for controlling input power to variable displacement hydraulic pumps of a hydraulic system 失效
    用于控制液压系统的可变排量液压泵的输入功率的控制系统

    公开(公告)号：US4809504A

    公开(公告)日：1989-03-07

    申请号：US2281

    申请日：1987-01-12

    申请人： Eiki Izumi ,  Yasuo Tanaka ,  Hiroshi Watanabe ,  Shigetaka Nakamura

    发明人： Eiki Izumi ,  Yasuo Tanaka ,  Hiroshi Watanabe ,  Shigetaka Nakamura

    IPC分类号： F04B49/06 ,  F04B49/08 ,  F16H39/46

    CPC分类号： F04B49/08 ,  F04B49/065

    摘要： A control system for controlling input power to hydraulic pumps of a hydraulic system including a prime mover and a plurality of variable displacement hydraulic pumps driven by said prime mover. The control system comprises: a first computing unit for computing, for each of the hydraulic pumps, an input torque control value concerning a distribution of input torques of said hydraulic pumps from a representative pressure obtained on the basis of a discharge pressure of at least one other hydraulic pumps; a second computing unit for determining an input torque for each of the hydraulic pumps on the basis of a corresponding one of the input torque control values determined by the first computing unit; and a third computing unit for determining an object discharge rate of each of the hydraulic pumps from the input torque obtained by the second computing unit and an own discharge pressure of each of the hydraulic pumps.

    摘要翻译： 一种用于控制包括原动机和由所述原动机驱动的多个可变排量液压泵的液压系统的液压泵的输入功率的控制系统。 该控制系统包括：第一计算单元，用于针对每个液压泵，从基于至少一个的排出压力获得的代表性压力计算关于所述液压泵的输入转矩分布的输入转矩控制值 其他液压泵; 第二计算单元，用于基于由第一计算单元确定的输入转矩控制值中的相应一个确定每个液压泵的输入转矩; 以及第三计算单元，用于根据由第二计算单元获得的输入扭矩和每个液压泵的自身排出压力来确定每个液压泵的物体排出速率。

    Control system for hydraulic circuit apparatus
    7.
    发明授权
    Control system for hydraulic circuit apparatus 失效

    公开(公告)号：US4561249A

    公开(公告)日：1985-12-31

    申请号：US426096

    申请日：1982-09-28

    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： B66C13/18 ,  E02F9/20 ,  E02F9/22 ,  F15B11/16 ,  F15B11/17 ,  F15B21/08 ,  F16H39/46

    CPC分类号： E02F9/2242 ,  B66C13/18 ,  E02F9/2025 ,  E02F9/2221 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/17 ,  F15B21/087 ,  F15B2211/20546 ,  F15B2211/20561 ,  F15B2211/27 ,  F15B2211/30515 ,  F15B2211/30595 ,  F15B2211/327 ,  F15B2211/6333 ,  F15B2211/6652 ,  F15B2211/6654 ,  F15B2211/71

    摘要： A control system for a hydraulic circuit having at least first and second hydraulic pumps of the variable displacement type, a first hydraulic actuator arranged for hydraulic connection with the first pump through first valve to be driven thereby, and a second hydraulic actuator arranged for selective hydraulic connection with said first and second pumps through second and third valve respectively to be driven thereby. The order of priority for hydraulic connection is preset so that, when an operation signal for the second actuator is received while the first pump is inoperative, the first pump takes priority over the second pump, and when an operation signal for the first actuator is received while the first pump is in hydraulic connection with the second actuator, the first actuator takes priority over the second actuator and the second actuator is brought into hydraulic connection with the second pump, and the displacement volume of the first pump and switching of the second valve means are controlled such that, when the first pump which is, in hydraulic connection with the second actuator, is to be brought into hydraulic connection with the first actuator, the displacement volume of the first pump is returned to zero before changing of the hydraulic connection. The control system includes a first judging device for determining if the first pump is in hydraulic connection with the second actuator when the operation signal for the first actuator is received, and for generating a command for backing up reduction in the supply of hydraulic fluid into the second actuator simultaneously when the displacement volume of the first pump begins to returns to zero. When judged that the first pump is in hydraulic connection with the second actuator, a command signal switches a third valve to an open position in accordance with the backup command. A command for initiating a displacement of the second pump is generated in accordance with the backup command.

    Flushing valve system in closed circuit hydrostatic power transmission
    8.
    发明授权
    Flushing valve system in closed circuit hydrostatic power transmission 失效
    冲洗阀系统在闭路静液压传动

    公开(公告)号：US4531369A

    公开(公告)日：1985-07-30

    申请号：US351756

    申请日：1982-02-24

    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： F15B11/08 ,  F16H39/02 ,  F16H61/40 ,  F16H61/4008 ,  F16H61/4104 ,  F16H61/4139 ,  F16D31/02

    CPC分类号： F16H61/40 ,  F16H39/02 ,  F16H61/4104

    摘要： A flushing valve system suitable for use in a closed circuit hydrostatic transmission including a variable displacement hydraulic pump, a hydraulic actuator and two main lines. The flushing valve system includes poppet valves mounted in passages for respectively communicating the main lines with a fluid tank, passages mounting throttles for causing the pressure in the main lines to act on pressure chambers to keep poppets of the poppet valves from moving to an open position, and a change-over valve responsive to the pressure differential between the main lines to communicate the pressure chamber of the poppet valve connected to the main line on the lower pressure side with the fluid tank. The poppet valve connected to the main line on the lower pressure side opens when a predetermined pressure level is exceeded by the pressure in the main line, to thereby allow working fluid in the main line to be drained to the fluid tank.

    摘要翻译： 一种适用于闭路静液压变速器的冲洗阀系统，包括可变排量液压泵，液压执行器和两条主线。 冲洗阀系统包括安装在通道中的提升阀，用于分别将主管线与流体箱连通，通道安装节流阀，用于使主管线中的压力作用在压力室上，以使提升阀的弹簧保持不动地移动到打开位置 以及响应于主管之间的压力差的换向阀，将连接到下压侧的主管的提升阀的压力室与流体箱连通。 当主管中的压力超过预定压力水平时，连接到下压侧的主管的提升阀开启，从而允许主管线中的工作流体排出到流体箱。

    Circuit pressure control system for hydrostatic power transmission
    9.
    发明授权
    Circuit pressure control system for hydrostatic power transmission 失效
    静压力传动电路压力控制系统

    公开(公告)号：US4510750A

    公开(公告)日：1985-04-16

    申请号：US270569

    申请日：1981-06-04

    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： F16H61/42 ,  F16H61/433 ,  F16H61/46 ,  F16D33/02

    CPC分类号： F16H61/433 ,  F16H2059/683 ,  F16H2059/6853 ,  F16H2059/6861

    摘要： A circuit pressure control system for a hydrostatic power transmission having a variable-displacement hydraulic pump driven by a prime mover, a hydraulic actuator for actuating a load and a displacement adjusting mechanism for the hydraulic pump. The hydraulic pump and actuator are connected together in closed or semi-closed circuit, and the displacement adjusting mechanism is actuated by a signal indicative of the operating lever manipulated variable and a signal indicative of the actual displacement of the hydraulic pump to control the speed of the hydraulic actuator. The circuit pressure control system is provided with a sensor for sensing the circuit pressure of the hydrostatic power transmission and generating a signal indicative of the sensed circuit pressure, a device for calculating based on the manipulated variable and circuit pressure signal a hydraulic pump displacement command that causes the displacement of the hydraulic pump to be changed at a maximum rate when the circuit pressure is below a predetermined value and causes the changing rate of the displacement to be reduced when the predetermined value is exceeded thereby, and a device for comparing the displacement command with the actual displacement of the hydraulic pump and producing a signal for decreasing the difference between them and supplying such signal to the displacement adjusting mechanism.

    摘要翻译： 一种用于具有由原动机驱动的可变排量液压泵的液压动力传动的回路压力控制系统，用于致动负载的液压致动器和用于液压泵的位移调节机构。 液压泵和致动器在闭合或半闭合的电路中连接在一起，位移调节机构由表示操作杆操纵变量的信号和表示液压泵的实际位移的信号致动以控制液压泵的速度 液压执行器。 电路压力控制系统设置有用于感测静液压力传递的电路压力并产生指示感测电路压力的信号的传感器，用于基于操作变量和电路压力信号计算的装置，液压泵排量指令， 导致当电路压力低于预定值时液压泵的位移以最大速率变化，并且当超过预定值时使位移的变化率减小，并且用于比较位移指令 与液压泵的实际位移产生用于减小它们之间的差异并将信号提供给位移调节机构的信号。

    Method of and system for controlling hydraulic power system
    10.
    发明授权
    Method of and system for controlling hydraulic power system 失效
    液压动力系统控制方法及系统

    公开(公告)号：US4606313A

    公开(公告)日：1986-08-19

    申请号：US387884

    申请日：1982-06-09

    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： F02D29/04 ,  B60W10/06 ,  B60W10/10 ,  B60W30/18 ,  E02F9/22 ,  F02D41/38 ,  F04B49/00 ,  F16H61/42 ,  F16H61/46 ,  F16H61/465 ,  F02M39/00

    CPC分类号： B60W10/103 ,  B60W10/06 ,  B60W30/1882 ,  E02F9/2235 ,  E02F9/2246 ,  E02F9/2296 ,  F02D29/04 ,  F02D41/38 ,  F16H61/465 ,  B60W2710/0644 ,  F02D2200/0602 ,  F02D2250/18 ,  F02D2250/31 ,  F16H61/42

    摘要： A method of and system for controlling a hydraulic power system comprising an internal combustion engine receiving a supply of fuel from a fuel injection pump, and at least one variable displacement hydraulic pump driven by the internal combustion engine. An engine speed deviation is obtained from the difference between a target speed set by an accelerator operation of the internal combustion engine and an output speed thereof. Then a fuel injection target value in predetermined functional relation to the engine speed deviation, is obtained based on at least the engine speed deviation, and a fuel injection rate of the fuel injection pump is controlled based on the fuel injection target value. At the same time, a displacement volume target value of the hydraulic pump is determined based on at least the engine speed deviation and an actual discharge pressure of the hydraulic pump in such a manner that as the engine speed deviation increases an input torque of the hydraulic pump decreases, and the displacement volume of the hydraulic pump is controlled based on the displacement volume target value.

    摘要翻译： PCT No.PCT / JP81 / 00270 Sec。 371日期1982年6月9日 102（e）1982年6月9日PCT PCT 1981年10月8日PCT公布。 公开号WO82 / 01396 日期：1982年4月29日。一种用于控制液压动力系统的方法和系统，包括从燃料喷射泵接收燃料的内燃机，以及由内燃机驱动的至少一个可变排量液压泵。 根据由内燃机的加速器操作设定的目标速度与其输出速度之间的差异，求出发动机转速偏差。 然后，基于至少发动机转速偏差获得与发动机转速偏差相关的预定功能关系的燃料喷射目标值，并且基于燃料喷射目标值来控制燃料喷射泵的燃料喷射率。 同时，至少基于液压泵的发动机转速偏差和实际排出压力来确定液压泵的排量体积目标值，使得随着发动机转速偏差增加液压泵的输入转矩 泵减少，并且基于排量体积目标值来控制液压泵的排量。