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61. 发明授权

US5934879A Pump torque control system 失效
标题翻译：泵扭矩控制系统
公开(公告)号：US5934879A
公开(公告)日：1999-08-10
申请号：US771195
申请日：1996-12-20
申请人： Shigetoshi Konno , Toichi Hirata , Genroku Sugiyama , Shigehiro Yoshinaga , Youichi Kowatari , Kouji Ishikawa
发明人： Shigetoshi Konno , Toichi Hirata , Genroku Sugiyama , Shigehiro Yoshinaga , Youichi Kowatari , Kouji Ishikawa
IPC分类号： E02F9/22 , F04B49/06 , F04B49/00
CPC分类号： E02F9/2246 , E02F9/2235 , E02F9/2296 , B60W2710/0644
摘要： An engine torque, which corresponds to a target engine speed inputted in a controller, is determined by a functional computing function unit. A torque correction value is added to the engine torque, followed by the multiplication with a constant. The product is divided by a pump delivery pressure to determine a pump displacement. A target tilting corresponding to this value is determined by another functional computing function unit, and is then compared with another target tilting which has been determined from a negative control pressure. The smaller one is selected and is outputted as a target tilting. The torque correction value is set at an EEPROM through an input device as desired. Selection of a negative value as the torque correction value makes it possible to prevent occurrence of stalling.
摘要翻译：对应于输入到控制器中的目标发动机转速的发动机扭矩由功能计算功能单元确定。将扭矩校正值加到发动机转矩上，然后与常数相乘。产品除以泵的输送压力以确定泵的排量。对应于该值的目标倾斜由另一功能计算功能单元确定，然后与从负控制压力确定的另一目标倾斜进行比较。选择较小的一个作为目标倾斜输出。转矩校正值根据需要通过输入装置设置在EEPROM上。选择负值作为转矩校正值使得可以防止停止的发生。

62. 发明授权

US5907951A Hydraulic control system for construction machine 失效
标题翻译：施工机械液压控制系统
公开(公告)号：US5907951A
公开(公告)日：1999-06-01
申请号：US35334
申请日：1998-03-05
申请人： Tsukasa Toyooka , Toichi Hirata , Genroku Sugiyama , Kouji Ishikawa , Tsuyoshi Nakamura
发明人： Tsukasa Toyooka , Toichi Hirata , Genroku Sugiyama , Kouji Ishikawa , Tsuyoshi Nakamura
IPC分类号： F04B49/00 , E02F9/22 , F04B1/26 , F16D31/02
CPC分类号： E02F9/2296 , E02F9/2232 , E02F9/2285
摘要： A hydraulic control system according to the present invention for a construction machine is provided with a directional control valve switchable by a pilot control valve, a hydraulic cylinder, a pilot pump, a selector valve for selecting one of a maximum value out of pilot pressures of the pilot control valve, a flow control unit for controlling the flow rate of a variable displacement hydraulic pump, a pressure-reducing valve for converting a delivery pressure of the pilot pump to a pump control signal, which controls driving of the flow control unit, in accordance with a pilot pressure guided to a first signal line connected to the selector valve, a branch line connecting the pilot pump and the pressure-reducing valve with each other, and a second signal line for guiding the pump control signal, which has been converted at the pressure-reducing valve, to the flow control unit.
摘要翻译：根据本发明的用于建筑机械的液压控制系统设置有可由先导控制阀，液压缸，先导泵，先导泵，选择阀切换的方向控制阀，用于从先导控制阀先导控制阀，用于控制可变排量液压泵的流量的流量控制单元，用于将先导泵的输送压力转换为泵控制信号的减压阀，其控制流量控制单元的驱动，根据引导到连接到选择阀的第一信号线的先导压力，连接先导泵和减压阀的分支管线和用于引导泵控制信号的第二信号线在减压阀处转换到流量控制单元。

63. 发明授权

US5673558A Hydraulic circuit system for hydraulic excavator 失效
标题翻译：液压挖掘机液压回路系统
公开(公告)号：US5673558A
公开(公告)日：1997-10-07
申请号：US596296
申请日：1996-02-13
申请人： Genroku Sugiyama , Toichi Hirata , Koji Ishikawa , Tsukasa Toyooka , Tsuyoshi Nakamura
发明人： Genroku Sugiyama , Toichi Hirata , Koji Ishikawa , Tsukasa Toyooka , Tsuyoshi Nakamura
IPC分类号： E02F3/43 , E02F3/85 , E02F9/22 , F16D31/02
CPC分类号： E02F9/2282 , E02F9/2228 , E02F9/2242 , E02F9/2285
摘要： For enabling a boom to be smoothly raised during the triple combined operation of boom-up, arm-crowd and bucket-crowd in a hydraulic circuit system for a hydraulic excavator, in a first valve group of a hydraulic valve apparatus (12), a variable throttle valve (70) is installed in a feeder passage (32) of a bucket directional control valve (21) downstream of a load check valve (32a), and a secondary pressure C as a boom-up operation command is introduced through a line (71) to a pilot control sector (70a) of the variable throttle valve (70) which sector operates in the throttling direction, so that when the secondary pressure C is 0 or small, the variable throttle valve (70) is fully opened and, as the secondary pressure C increases, an opening area of the variable throttle valve (70) is reduced to restrict the flow rate of a hydraulic fluid supplied through the bucket directional control valve (21).
摘要翻译： PCT No.PCT / JP95 / 01258 Sec。 371日期1996年2月13日 102（e）日期1996年2月13日PCT提交1995年6月23日PCT公布。公开号WO96 / 00820 日期1996年1月11日为了在液压挖掘机的液压回路系统中，在液压阀装置的第一阀组中，在起重臂，悬臂和斗斗的三重组合操作期间能够平稳地升高起重臂（12）中，可变节流阀（70）安装在负载止回阀（32a）下游的铲斗方向控制阀（21）的供给通路（32）中，作为动臂上升操作的二次压力C 命令通过管线（71）引导到可变节流阀（70）的先导控制扇区（70a），该扇区在节流方向上操作，使得当二次压力C为0或小时，可变节流阀 70）完全打开，并且随着二次压力C增加，可变节流阀（70）的开口面积减小以限制通过铲斗方向控制阀（21）供给的液压流体的流量。

64. 发明授权

US5442912A Hydraulic recovery device 失效
标题翻译：液压回收装置
公开(公告)号：US5442912A
公开(公告)日：1995-08-22
申请号：US256557
申请日：1994-07-11
申请人： Toichi Hirata , Genroku Sugiyama , Masami Ochiai
发明人： Toichi Hirata , Genroku Sugiyama , Masami Ochiai
IPC分类号： E02F9/22 , F15B11/024 , F16D31/02 , F15B11/16
CPC分类号： E02F9/2282 , E02F9/2221 , E02F9/2296 , F15B11/024 , F15B2011/0243 , F15B2011/0246 , F15B2211/20546 , F15B2211/20576 , F15B2211/30505 , F15B2211/30525 , F15B2211/3058 , F15B2211/3116 , F15B2211/31576 , F15B2211/329 , F15B2211/6303 , F15B2211/6309 , F15B2211/6313 , F15B2211/6316 , F15B2211/6346 , F15B2211/6654 , F15B2211/6655 , F15B2211/67 , F15B2211/7053 , F15B2211/7058 , F15B2211/71 , F15B2211/75 , F15B2211/88
摘要： A hydraulic recovery device in a hydraulic system having a pump (1) driving a plurality of actuators through a plurality of control valves (2, 3), the hydraulic recovery device comprising a variable resistance valve (6, 60) in a first line being controlled by a control signal (Px), a third line, a check valve (7) disposed in the third line for allowing the hydraulic fluid to flow only in a direction from the first line toward the second line. The hydraulic recovery device further comprises (a) detecting apparatus (101; 106; 102a, 102b; 103a, 103b) for detecting a condition variable (Pd; Ph; Pia1, Pia2; Pib1, Pib2) related to an operation of the actuator (4); (b) control apparatus (100; 100A-100H) for receiving a signal from the detecting apparatus and producing a drive signal (i; i*) corresponding to the condition variable based on a relationship stored therein in advance; and (c) control signal generating apparatus (105) for receiving the drive signal and producing the control signal (Px) corresponding to the drive signal, whereby the device can optionally set a characteristic of the variable resistance valve and can avoid abrupt changes in a recovered flow rate.
摘要翻译： PCT No.PCT / JP93 / 01763 Sec。 371日期：1994年7月11日 102（e）日期1994年7月11日PCT 1993年12月3日PCT PCT。第WO94 / 13959号公报日期：1994年6月23日。液压系统中的液压回收装置，具有通过多个控制阀（2,3）驱动多个致动器的泵（1），所述液压回收装置包括可变阻力阀（6， 60）由控制信号（Px）控制，第三线，设置在第三线中的止回阀（7），用于允许液压流体仅沿着从第一线路朝向第二线路的方向流动。液压回收装置还包括（a）检测装置（101; 106; 102a，102b; 103a，103b），用于检测与致动器的操作有关的状态变量（Pd; Ph; Pia1，Pia2; Pib1，Pib2） 4）; （b）控制装置（100; 100A-100H），用于从所述检测装置接收信号，并且根据预先存储的关系产生与所述条件变量相对应的驱动信号（i; i *）; 和（c）用于接收驱动信号并产生对应于驱动信号的控制信号（Px）的控制信号发生装置（105），由此该装置可以可选地设置可变电阻阀的特性，并且可以避免回收流量。

65. 发明授权

US5392539A Hydraulic drive system for construction machine 失效
公开(公告)号：US5392539A
公开(公告)日：1995-02-28
申请号：US75588
申请日：1993-06-15
申请人： Toichi Hirata , Genroku Sugiyama , Masami Ochiai
发明人： Toichi Hirata , Genroku Sugiyama , Masami Ochiai
IPC分类号： E02F9/22 , F16D31/02 , G06F15/20
CPC分类号： E02F9/2239 , E02F9/2292
摘要： In a hydraulic drive system for a construction machine, first flow control mechanism includes first and second flow control valves (11a, 11b) and first interlock mechanism (54, 55) for interlocking the first and second flow control valves with first directional control mechanism (7), and second flow control mechanism includes third and fourth flow control valves (12a, 12b) and second interlock mechanism (56, 57) for interlocking the third and fourth flow control valves with second directional control mechanism (9). First pressure control mechanism includes at least first pressure control valve (13a) operated in response to a pressure signal in a valve-closing direction, and second pressure control mechanism includes only second pressure control valve (15b) operated in response to the pressure signal in a valve-closing direction. A first hydraulic pump (25a) is connected to a first actuator (19) via the first flow control valve (11a), the first pressure control valve (13a) and the first directional control mechanisms (7), and a second hydraulic pump ( 25b) is connected to the first actuator (19) via the second flow control valve (11b) and the first directional control mechanism (7). The first hydraulic pump (25a) is also connected to a second actuator (21) via the third flow control valve (12a) and the second directional control mechanism (9) in parallel to the first actuator (19) without passing any pressure control valve, and the second hydraulic pump (25b) is also connected to the second actuator (21) via the fourth flow control valve (12b), the second pressure control valve (15b) and the second directional control mechanism (9) in parallel to the first actuator (19).

66. 发明授权

US5177964A Hydraulic drive traveling system 失效
标题翻译：液压驱动行驶系统
公开(公告)号：US5177964A
公开(公告)日：1993-01-12
申请号：US499418
申请日：1990-06-25
申请人： Hideaki Tanaka , Toichi Hirata , Genroku Sugiyama , Hitoshi Kagiwada , Tomohiko Yasuoka , Hiroshi Watanabe , Eiki Izumi , Hiroshi Onoue
发明人： Hideaki Tanaka , Toichi Hirata , Genroku Sugiyama , Hitoshi Kagiwada , Tomohiko Yasuoka , Hiroshi Watanabe , Eiki Izumi , Hiroshi Onoue
IPC分类号： E02F9/22 , F16H61/40 , F16H61/4069 , F16H61/4148 , F16H61/42 , F16H61/421 , F16H61/425 , F16H61/435 , F16H61/46 , F16H61/47
CPC分类号： E02F9/2235 , E02F9/2253 , E02F9/2296 , F16H61/4069 , F16H61/4148 , F16H61/421 , F16H61/425 , F16H61/435 , F16H61/46 , F16H61/47
摘要： A hydraulic drive traveling system has a pressure compensated low control valve connected between a hydraulic pump and a variable displacement type hydraulic motor for controlling a flow rate of the hydraulic fluid supplied to the motor. The flow rate is controlled in accordance with the delivery pressure of the pump and demanded traveling speed of the motor. When the delivery pressure of the pump is at a high level, the motor is shifted to a first capacity. When the delivery pressure of the pump is low, the motor is shifted to either the second capacity or the first capacity depending upon the demanded traveling speed.
摘要翻译： PCT No.PCT / JP90 / 00097 Sec。 371日期：1990年6月25日 102（e）1990年6月25日PCT 1990年1月26日PCT PCT。公开号WO90 / 08910 1990年9月8日。液压驱动行驶系统具有连接在液压泵和可变排量型液压马达之间的压力补偿低控制阀，用于控制供给马达的液压流体的流量。流量根据泵的输送压力进行控制，并要求电机的行进速度。当泵的输送压力处于高水平时，电动机转移到第一容量。当泵的输送压力低时，电动机根据需要的行驶速度而转移到第二容量或第一容量。

67. 发明授权

US5155996A Hydraulic drive system for construction machine 失效
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.

68. 发明授权

US5146747A Valve apparatus and hydraulic circuit system 失效
标题翻译：阀门装置和液压回路系统
公开(公告)号：US5146747A
公开(公告)日：1992-09-15
申请号：US623644
申请日：1990-12-18
申请人： Genroku Sugiyama , Toichi Hirata
发明人： Genroku Sugiyama , Toichi Hirata
IPC分类号： E02F9/22 , F15B11/16 , F15B13/04
CPC分类号： E02F9/2296 , E02F9/2232 , E02F9/2285 , F15B11/165 , F15B13/0417 , F15B2211/20553 , F15B2211/30505 , F15B2211/30535 , F15B2211/30555 , F15B2211/3111 , F15B2211/3144 , F15B2211/31576 , F15B2211/329 , F15B2211/351 , F15B2211/50518 , F15B2211/50536 , F15B2211/5151 , F15B2211/528 , F15B2211/56 , F15B2211/6052 , F15B2211/6054 , F15B2211/6058
摘要： A valve apparatus (10; 10A) has at least one directional control valve (31; 31A) having a pair of variable restricting sections (43, 44) disposed between a supply passage (35) communicating with a hydraulic fluid supply source (11) and a pair of load passages (36, 37) communicating with an actuator (12). A pressure controller (32) or a pressure compensating valve (32A) is provided for holding a differential pressure across the variable restricting sections at a predetermined value. A detection line (57; 57A) is branched from a first passage (32; 86, 87) located between the pair of variable restricting sections and the pair of load passages for receiving a load pressure produced upon operation of the actuator. A check valve (59) or shuttle valve (90, 91) is provided for selecting a maximum load pressure and a control line (61, 62) introduces the selected maximum load pressure, as a control pressure, to the pressure controller or pressure compensating valve. Further, a passage (71; 86) and a check valve (73) are disposed downstream of a point where the detection line (57; 57A) is branched from the first passage (39; 86), for allowing a flow of a hydraulic fluid from the first passage toward the load passage (36) corresponding to one (43) of the variable restricting sections, but blocking off a flow of the hydraulic fluid in the reverse direction when the one variable restricting section (43) is opened.

69. 发明授权

US4938022A Flow control system for hydraulic motors 失效
标题翻译：液压马达流量控制系统
公开(公告)号：US4938022A
公开(公告)日：1990-07-03
申请号：US213107
申请日：1988-06-29
申请人： Toichi Hirata , Yusaku Nozawa
发明人： Toichi Hirata , Yusaku Nozawa
IPC分类号： E02F9/22 , F15B13/04
CPC分类号： E02F9/2232 , E02F9/2225 , F15B13/0405 , Y10T137/87193
摘要： In a hydraulic drive system, first and second flow control valves means comprise each: a main valve having a valve body for controlling communication between an inlet port and an outlet port both connected to a main circuit, a variable restrictor capable of changing an opening degree thereof in response to displacements of the valve body, and a back pressure chamber communicating with the outlet port through the variable restrictor and producing a control pressure to urge the valve body in the valve-opening direction; a pilot valve connected to a pilot circuit which is connected between the inlet port of and the back pressure chamber of the main valve; and an auxiliary valve 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 and outlet pressures of the pilot valve has a relationship expressed by a certain equation including predetermined 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 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, respectively.

70. 发明授权

US4881450A Drive control system for hydraulic machine 失效
标题翻译：液压机驱动控制系统
公开(公告)号：US4881450A
公开(公告)日：1989-11-21
申请号：US173585
申请日：1988-03-25
申请人： Toichi Hirata , Masakazu Haga , Ichiro Hirami , Kuniaki Yoshida
发明人： Toichi Hirata , Masakazu Haga , Ichiro Hirami , Kuniaki Yoshida
IPC分类号： G05B19/40
CPC分类号： G05B19/40 , G05B2219/35438 , G05B2219/36551 , G05B2219/41309
摘要： A drive control system, which is suitable for use in a hydraulic machine, is equipped with an electric lever device having a manipulation lever and a potentiometer for generating an electrical manipulation signal corresponding to the degree of each manipulation of the lever, a control valve connected to a hydraulic circuit adapted to actuate a hydraulic actuator, and a controller unit equipped with a main controller for receiving the manipulation signal and computing a control signal for the control valve on the basis of the manipulation signal and an output device for generating an electrical actuation signal corresponding to the control signal. The system also includes a neutral position sensing means provided with the electric lever device and adapted to sense a neutral position of the manipulation lever and an inhibition device which receives an output signal from the neutral position sensing means and when the manipulation lever is at the neutral position, inhibits the transmission of a signal between the main controller of the control means and the control valve.

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