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1. 发明授权

US5488787A Hydraulic drive system for construction machine 失效
公开(公告)号：US5488787A
公开(公告)日：1996-02-06
申请号：US284410
申请日：1994-08-03
申请人： Yukio Aoyagi , Kazuhiko Otsubo , Gen Yasuda , Koji Fujita , Takayuki Yamakawa , Kazuyoshi Narita
发明人： Yukio Aoyagi , Kazuhiko Otsubo , Gen Yasuda , Koji Fujita , Takayuki Yamakawa , Kazuyoshi Narita
IPC分类号： E02F9/22 , F16D31/02 , G06F15/20
CPC分类号： E02F9/226 , E02F9/2217 , E02F9/2246
摘要： When a prime mover (1) is driven, a controller (25) outputs an open-drive signal for bringing an opening/shutting valve (23) into an open position and, upon a control lever (68, etc.) being operated, a hydraulic fluid is supplied from an auxiliary hydraulic pump (7) through pressure reducing valves to driving sectors of directional control valves (8 to 16) for shifting them. A flow rate and a direction of flow of the hydraulic fluid from main hydraulic pumps (3, 4) are thereby adjusted so that actuators (57A, 57B, 57C, 56A, 54) can be each operated at a speed depending on the amount by which the control lever is operated. When one of the actuators (57A, 57B, 57C, 56A, 54) is to be driven when the prime mover (1) is not driven, an open command is selected in a selection command device (24), whereupon the controller (25) outputs the open-drive signal, causing the opening/shutting valve (23) to open a line interconnecting the accumulator (21) and the pressure reducing valve (17), etc. By now operating the control lever (68), for example, the directional control valve (9) is shifted so that a boom cylinder (57A) is operated with the dead weight of a working unit to allow a descent thereof. When any of the actuators (57A, 57B, 57C, 56A, 54) is not to be driven when the prime mover (1) is in a stopped state, a shut command is selected in the selection command device (24), whereupon the controller (25) outputs a shut-drive signal, causing the opening/shutting valve (23) to shut off the line interconnecting the accumulator (21) and the pressure reducing valve (17). Even if the control lever (68), etc. are touched by a mistake under such a condition, no actuators (57A, 57B, 57C, 56A, 54) are operated and the working unit is not descended. Thus, the actuators are surely prevented from being operated against the intention of an operator.

2. 发明授权

US4627013A Load weight indicating system for load moving machine 失效
标题翻译：负载移动机负载重量指示系统
公开(公告)号：US4627013A
公开(公告)日：1986-12-02
申请号：US556403
申请日：1983-11-30
申请人： Shuichi Ichiyama , Yukio Aoyagi , Tomohiko Yasuda
发明人： Shuichi Ichiyama , Yukio Aoyagi , Tomohiko Yasuda
IPC分类号： E02F9/26 , G06F15/32 , G06G7/68
CPC分类号： E02F9/264
摘要： A load weight calculating system for a load moving machine, such as a hydraulic excavator, including a support, and a front attachment pivotably supported by the support. The front attachment includes a first linkage element pivotably supported by the support, a second linkage element pivotably supported by the first linkage element, a loading section supported by the second linkage element, and first and second hydraulic actuators for moving the first and second linkage elements, respectively. The load weight calculating system includes a first displacement detector and a second displacement detector for obtaining displacements .alpha..sub.1 and .beta..sub.1 of at least the first and second linkage elements, respectively, a pressing force sensor for obtaining a pressing force K.sub.1 exerted by at least one of the first and second hydraulic actuators, a weight calculating unit for calculating the weight of a load carried by the loading section based on the values .alpha..sub.1, .beta..sub.1 and K.sub.1 obtained at least by the first and second displacement detector and pressing force sensor, and a weight indicating unit for indicating a value associated with the load weight obtained by the weight calculating unit.
摘要翻译：一种用于负载移动机械的负载重量计算系统，例如包括支撑件的液压挖掘机，以及由支撑件可枢转地支撑的前部附件。前附件包括由支撑件可枢转地支撑的第一联动元件，由第一联动元件可枢转地支撑的第二联动元件，由第二联动元件支撑的装载部分，以及用于移动第一和第二联动元件的第一和第二液压致动器，分别。负载重量计算系统包括第一位移检测器和第二位移检测器，用于分别获得至少第一和第二联动元件的位移α1和β1;按压力传感器，用于获得由至少一个第一和第二液压致动器的重量计算单元，用于基于至少由第一和第二位移检测器和按压力传感器获得的值α1，β1和K1计算装载部分承载的载荷的重量的重量计算单元，以及权重指示单元，用于指示与由权重计算单元获得的负载权重相关联的值。

3. 发明授权

US4606313A Method of and system for controlling hydraulic power system 失效
标题翻译：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。

4. 发明授权

US4587808A Control system for hydraulic circuit means 失效
标题翻译：液压回路装置控制系统
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。

5. 发明授权

US5056312A Hydraulic drive system for construction machines 失效
标题翻译：液压驱动系统
公开(公告)号：US5056312A
公开(公告)日：1991-10-15
申请号：US449845
申请日：1989-11-22
申请人： Toichi Hirata , Genroku Sugiyama , Yusuke Kajita , Yukio Aoyagi , Tomohiko Yasudi , Gen Yasuda , Hiroshi Watanabe , Eiki Izumi , Yasuo Tanaka , Hiroshi Onoue , Shigetaka Nakamura
发明人： Toichi Hirata , Genroku Sugiyama , Yusuke Kajita , Yukio Aoyagi , Tomohiko Yasudi , Gen Yasuda , Hiroshi Watanabe , Eiki Izumi , Yasuo Tanaka , Hiroshi Onoue , Shigetaka Nakamura
IPC分类号： E02F9/22 , F15B11/16 , F15B21/08
CPC分类号： F15B21/087 , E02F9/2228 , E02F9/2235 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B11/163 , F04B2205/05 , F04B2207/01 , F15B2211/20553 , F15B2211/25 , F15B2211/30535 , F15B2211/3111 , F15B2211/40515 , F15B2211/40569 , F15B2211/428 , F15B2211/455 , F15B2211/6052 , F15B2211/6309 , F15B2211/6313 , F15B2211/6355 , F15B2211/65 , F15B2211/6653 , F15B2211/6654 , F15B2211/71 , F15B2211/78
摘要： A hydraulic system for a construction machine comprising plural hydraulic actuators (23-28) driven by fluid supplied from a pump (22), first and second flow control valves (29-34) for controlling flows of fluid supplied to the first and second actuators, and first and second distribution compensating valves (35-40) for controlling first differential pressure (.DELTA.P v1-.DELTA.P v6) produced between inlets and outlets of the first and second flow control valves. The first and second distribution compensating valves have respective drives (45-50, 35c-40c) for applying control forces (Fc1-Fc2) in accordance with the second differential pressure to the associated distribution compensating valves, to thereby set target values of the first differential pressures. The hydraulic system includes first means (59) for detecting the second differential pressure (.DELTA.P LS) from the discharge pressure (P s) of the pump (22) and the maximum load pressure (P amax) out of the first and second actuators; second means (61) for calculating individual values (Fc1-Fc6), as values of the control forces applied from the drives (45-50, 35C-40C) of the first and second distribution compensating valves (35-40), in accordance with at least the second differential pressure detected by the first means; and first and second control pressure generators (62a-62f) provided in association with the first and second distribution compensating valves. The first and second control pressure generators (62a-62f) produce control pressures (P c1-P c6) dependent on the individual values obtained by the second means and output the control pressures to the drives (35c-40c) of the first and second distribution compensating valves.

6. 发明授权

US4561250A Hydraulic drive system having a plurality of prime movers 失效
标题翻译：具有多个原动机的液压驱动系统
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。

7. 发明授权

US4520626A Hydraulic drive system for single rod cylinder 失效
标题翻译：单杆缸液压驱动系统
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。

8. 发明授权

US4451893A Control method and control system for hydrostatic drive system 失效
标题翻译：静液压驱动系统控制方法及控制系统
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。

9. 发明授权

US4395199A Control method of a system of internal combustion engine and hydraulic pump 失效
标题翻译：内燃机和液压泵系统的控制方法
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。

10. 发明授权

US5277027A Hydraulic drive system with pressure compensting valve 失效
标题翻译：带压力调节阀的液压驱动系统
公开(公告)号：US5277027A
公开(公告)日：1994-01-11
申请号：US946353
申请日：1992-10-27
申请人： Yukio Aoyagi , Tomohiko Yasuda
发明人： Yukio Aoyagi , Tomohiko Yasuda
IPC分类号： E02F9/22 , F16D31/02
CPC分类号： E02F9/2232 , E02F9/2282 , E02F9/2292 , E02F9/2296
摘要： A hydraulic drive system for construction machines comprising a valve group (52) including a plurality of directional control valves (9-13) of center bypass type, a center bypass line (2a) for connecting in series center bypasses of the plural directional control valves to a low-pressure circuit (29), a plurality of bleeding-off variable restrictor means (56) respectively disposed in the center bypasses of the plural directional control valves, a pressure compensating valve (20) provided in the center bypass line, and first and second differential pressure detecting lines (22, 24) connected to the center bypass line for transmitting a differential pressure to the pressure compensating valve. One (22) of the first and second differential pressure detecting lines (22,244) is connected to the center bypass line (2a) at a position between the bleeding-off variable restrictor means (56) of at least one particular directional control valve (9) in the valve group (52) and the bleeding-off variable restrictor means (56) of another directional control valve (10) adjacent to that particular directional control valve, and the other (24) of the first and second differential pressure detecting lines (22, 24) is connected to the center bypass line (2a) at a position adapted to detect a differential pressure across the bleeding-off variable restrictor means of at least that another directional control valve.
摘要翻译： PCT No.PCT / JP92 / 00477 Sec。 371日期：1992年10月27日 102（e）1992年10月27日PCT 1992年4月15日提交PCT。1。一种用于建筑机械的液压驱动系统，包括阀组（52），其包括多个中心旁路型方向控制阀（9-13）用于将多个方向控制阀的串联中心旁路连接到低压回路（29）的中心旁通管路（2a），分别设置在多个方向控制阀的中心旁路的多个排出可变节流装置（56）控制阀，设置在中心旁路管路中的压力补偿阀（20）以及连接到用于将压差传递给压力补偿阀的中心旁路管路的第一和第二差压检测线（22,24）。第一和第二差压检测线（22,244）中的一个（22）在至少一个特定方向控制阀（9）的排出可变节流装置（56）之间的位置处连接到中心旁通管线（2a））和与该特定方向控制阀相邻的另一个方向控制阀（10）的排出可变节流装置（56）和第一和第二差压检测线的另一个（24）（22,24）在适于检测出至少另一个方向控制阀的排出可变节流装置两端的差压的位置处连接到中心旁通管线（2a）。

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