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    Auto-acceleration system for prime mover of hydraulic construction machine and control system for prime mover and hydraulic pump
    1.
    发明授权
    Auto-acceleration system for prime mover of hydraulic construction machine and control system for prime mover and hydraulic pump 有权
    液压工程机械原动机自动加速系统，原动机和液压泵控制系统

    公开(公告)号：US5930996A

    公开(公告)日：1999-08-03

    申请号：US164365

    申请日：1998-10-01

    申请人： Kazunori Nakamura ,  Ei Takahashi ,  Tsukasa Toyooka ,  Kouji Ishikawa ,  Tsuyoshi Nakamura ,  Yoichi Kowatari ,  Tadatoshi Shimamura ,  Genroku Sugiyama ,  Toichi Hirata

    发明人： Kazunori Nakamura ,  Ei Takahashi ,  Tsukasa Toyooka ,  Kouji Ishikawa ,  Tsuyoshi Nakamura ,  Yoichi Kowatari ,  Tadatoshi Shimamura ,  Genroku Sugiyama ,  Toichi Hirata

    IPC分类号： B60K25/02 ,  E02F9/22 ,  F02D29/04 ,  F04B49/00 ,  F16D31/02

    CPC分类号： E02F9/2296 ,  E02F9/2235 ,  E02F9/2246 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2292

    摘要： In the arm-crowding or track operation, a calculating portion (700d2 or 700d4) calculates a modification gain (KAC or KTR) depending on an operation pilot pressure and a calculating portion (700g) calculates a decrease modification (DND) based on the KAC or KTR, while a calculating portion (700m or 700p) calculates a modification gain (KACH or KTRH) depending on an operation pilot pressure and calculating portions (700q-700s) calculate an increase modification (DNH) based on the KACH or KTRH. A reference target engine revolution speed NR0 is modified using the DND and DNH. In other operations than the arm-crowding and track operations, NR0 is modified using only the decrease modification (DND) calculated from the modification gain just depending on the operation pilot pressure. In the operation where an engine revolution speed is desired to become higher as an actuator load increases, the engine revolution speed can be controlled in accordance with change of the actuator load as well. In other operations, the engine revolution speed can be controlled just depending on the direction and input amount in and by which corresponding operation instructing apparatus is operated.

    摘要翻译： 在手臂拥挤或轨道操作中，计算部分（700d2或700d4）根据操作先导压力计算修正增益（KAC或KTR），并且计算部分（700g）基于KAC计算减小修改（DND） 或KTR，而计算部分（700m或700p）根据操作先导压力计算修正增益（KACH或KTRH），并且计算部分（700q-700s）基于KACH或KTRH计算增加修改（DNH）。 使用DND和DNH修改参考目标发动机转速NR0。 在除了拥挤和跟踪操作之外的其他操作中，NR0仅使用根据操作先导压力从修改增益计算的减少修改（DND）进行修改。 在致动器负载增加时希望发动机转速变高的操作中，也可以根据致动器负载的变化来控制发动机转速。 在其他操作中，可以根据相应的操作指示装置的操作方向和输入量来控制发动机转速。

    Traveling hydraulic working machine
    3.
    发明授权
    Traveling hydraulic working machine 有权
    行走液压作业机

    公开(公告)号：US07493978B2

    公开(公告)日：2009-02-24

    申请号：US10541450

    申请日：2004-07-30

    申请人： Tsuyoshi Nakamura ,  Genroku Sugiyama ,  Kazunori Nakamura ,  Toichi Hirata

    发明人： Tsuyoshi Nakamura ,  Genroku Sugiyama ,  Kazunori Nakamura ,  Toichi Hirata

    IPC分类号： F02D29/04

    CPC分类号： F02D41/021 ,  E02F9/2246 ,  F02D29/02 ,  F02D31/001

    摘要： A traveling hydraulic working machine has a target revolution speed of an engine commanded by an input and sensors for detecting an operating situation of a hydraulic actuator and an operating situation of a traveling system. A prime-mover revolution speed control modifies the target revolution speed of the prime mover when the operating situation of the hydraulic actuator and the operating situation of the traveling system come into respective particular states, and controls the revolution speed of the prime mover, With the traveling hydraulic working machine, in the combined operation of traveling and working a hydraulic actuator, work can be performed on the basis of the engine revolution speed intended by an operator. When a working load varies, the engine revolution speed is automatically controlled.

    摘要翻译： 行驶液压作业机具有由输入装置引导的发动机的目标转速以及用于检测液压致动器的运转状况的传感器和行驶系统的运转状况。 原动机转速控制可以在液压执行器的运行状态和行驶系统的运行状态达到各自的特定状态时修改原动机的目标转速，并控制原动机的转速。 行驶液压作业机，在组合操作液压执行机构的同时进行工作时，可以根据操作者的发动机转速进行工作。 当工作负载变化时，发动机转速自动控制。

    Traveling hydraulic working machine
    4.
    发明申请
    Traveling hydraulic working machine 有权
    行走液压作业机

    公开(公告)号：US20060201147A1

    公开(公告)日：2006-09-14

    申请号：US10543920

    申请日：2004-11-15

    申请人： Tsuyoshi Nakamura ,  Kazunori Nakamura ,  Toichi Hirata ,  Genroku Sugiyama ,  Kentaro Itoga

    发明人： Tsuyoshi Nakamura ,  Kazunori Nakamura ,  Toichi Hirata ,  Genroku Sugiyama ,  Kentaro Itoga

    IPC分类号： F16D31/02

    CPC分类号： B60W10/30 ,  B66F9/0655 ,  B66F9/20 ,  E02F9/2235 ,  E02F9/2296 ,  F04B49/065 ,  F04B2203/0603 ,  F16H2059/467

    摘要： A modification torque computing unit 83 computes a modification torque ΔT and a torque converter speed ratio e is computed from input and output revolution speeds of a torque converter 31. A first determination coefficient α corresponding to the speed ratio e, and a second determination coefficient β corresponding to a pump pressure are computed. A selector 87 selects the smaller one of these coefficients as a determination coefficient γ, and the modification torque ΔT is multiplied by γ to provide a modification torque ΔTA. An adder 89 adds the modification torque ΔTA (negative value) to a pump base torque TR to provide a modified pump base torque TRA, whereby a maximum pump absorption torque TRA is controlled so as to become TRA. The maximum pump torque reducing control can then be performed while accurately confirming a work situation during the combined operation of travel and a working actuator.

    摘要翻译： 修改扭矩计算单元83计算修正转矩DeltaT，并且由变矩器31的输入和输出转速计算变矩器速度比e。 计算对应于速比e的第一确定系数α和对应于泵压的第二确定系数β。 选择器87选择这些系数中的较小的一个作为确定系数γ，并且将修正转矩DeltaT乘以伽玛以提供修改转矩DeltaTA。 加法器89将修正转矩DeltaTA（负值）与泵基本转矩TR相加以提供改进的泵基本转矩TRA，由此控制最大泵吸收转矩TRA以变成TRA。 然后可以在行驶和工作执行器的组合操作期间精确地确认工作情况的同时执行最大泵扭矩降低控制。

    Traveling hydraulic working machine
    6.
    发明授权
    Traveling hydraulic working machine 有权
    行走液压作业机

    公开(公告)号：US07370475B2

    公开(公告)日：2008-05-13

    申请号：US10543920

    申请日：2004-11-15

    申请人： Tsuyoshi Nakamura ,  Kazunori Nakamura ,  Toichi Hirata ,  Genroku Sugiyama ,  Kentaro Itoga

    发明人： Tsuyoshi Nakamura ,  Kazunori Nakamura ,  Toichi Hirata ,  Genroku Sugiyama ,  Kentaro Itoga

    IPC分类号： F16D31/02

    CPC分类号： B60W10/30 ,  B66F9/0655 ,  B66F9/20 ,  E02F9/2235 ,  E02F9/2296 ,  F04B49/065 ,  F04B2203/0603 ,  F16H2059/467

    摘要： A modification torque ΔT and a torque converter speed ratio e is computed from input and output revolution speeds of a torque converter 31. A first determination coefficient α corresponding to the speed ratio e, and a second determination coefficient β corresponding to a pump pressure are computed. A selector 87 selects the smaller one of these coefficients as a determination coefficient γ, and the modification torque ΔT is multiplied by γ to provide a modification torque ΔTA. An adder 89 adds the modification torque ΔTA (negative value) to a pump base torque TR to provide a modified pump base torque TRA, whereby a maximum pump absorption torque TRA is controlled so as to become TRA. The maximum pump torque reducing control can then be performed while accurately confirming a work situation during the combined operation of travel and a working actuator.

    摘要翻译： 根据变矩器31的输入和输出转速来计算修正转矩DeltaT和变矩器速比e。 计算对应于速比e的第一确定系数α和对应于泵压的第二确定系数β。 选择器87选择这些系数中的较小的一个作为确定系数γ，并且将修正转矩DeltaT乘以伽玛以提供修改转矩DeltaTA。 加法器89将修正转矩DeltaTA（负值）与泵基本转矩TR相加以提供改进的泵基本转矩TRA，由此控制最大泵吸收转矩TRA以变成TRA。 然后可以在行驶和工作执行器的组合操作期间精确地确认工作情况的同时执行最大泵扭矩降低控制。

    Pressure compensating valve spool positioned by difference in pressure receiving areas for load and inlet pressures
    8.
    发明授权
    Pressure compensating valve spool positioned by difference in pressure receiving areas for load and inlet pressures 失效
    压力补偿阀由压力接收区域负载和入口压力的差异定位

    公开(公告)号：US5152140A

    公开(公告)日：1992-10-06

    申请号：US640440

    申请日：1991-02-06

    申请人： Toichi Hirata ,  Hideaki Tanaka ,  Genroku Sugiyama ,  Yusuke Kajita ,  Kazunori Nakamura

    发明人： Toichi Hirata ,  Hideaki Tanaka ,  Genroku Sugiyama ,  Yusuke Kajita ,  Kazunori Nakamura

    IPC分类号： E02F9/22 ,  F15B13/04

    CPC分类号： F15B13/0417 ,  E02F9/2232 ,  E02F9/2296 ,  Y10T137/7858

    摘要： A hydraulic drive system has a hydraulic pump (1), an actuator (2), a flow control valve (5) disposed between the hydraulic pump and the actuator, a pressure compensating valve (8; 8A; 8B) having a valve spool (23; 23A; 23B) that controls the differential pressure (Pz-PLS) across the flow control valve, and a pump delivery rate control device (9) for controlling a flow rate of the hydraulic fluid delivered from the hydraulic pump dependent on a differential pressure (Pd-PLS) between a pump pressure and a load pressure of the actuator. The pressure compensating valve has a first control chamber (30; 30A) subjected to the load pressure (PLS) of the actuator such that the load pressure acts on a first pressure receiving section (28; 28A) of the valve spool to urge the valve spool in the valve-opening direction, a second control chamber (29; 29A) subjected to the inlet pressure (Pz) of the flow control valve such that the inlet pressure acts on a second pressure receiving section (27; 27A) of the valve spool to urge the valve spool in the valve-closing direction, and a target differential pressure setting arrangement (31, 50, 51; 31B, 51) for urging the valve spool in the valve-opening direction. A damping capability to the actuator (2) is provided by setting pressure receiving area (Az) of the second pressure receiving section (27; 27A) to be greater than a pressure receiving area (ALS) of the first pressure receiving section (28; 28A).

    摘要翻译： PCT No.PCT / JP90 / 01310 Sec。 371日期1991年2月6日 102（e）日期1991年2月6日PCT 1990年10月11日PCT PCT。 出版物WO91 / 05958 日期：1991年5月2日。液压驱动系统具有液压泵（1），致动器（2），设置在液压泵和致动器之间的流量控制阀（5），压力补偿阀（8; 8A; 8B ）具有控制跨过流量控制阀的差压（Pz-PLS）的阀芯（23; 23A; 23B）和用于控制从所述流量控制阀输送的液压流体的流量的泵输送速率控制装置（9） 液压泵取决于泵压力和执行器的负载压力之间的压差（Pd-PLS）。 压力补偿阀具有受到致动器的负载压力（PLS）的第一控制室（30; 30A），使得负载压力作用在阀芯的第一压力接收部分（28; 28A）上，以推动阀 阀门处于阀打开方向，第二控制室（29; 29A）经受流量控制阀的入口压力（Pz），使得入口压力作用在阀的第二压力接收部分（27; 27A）上 阀芯沿阀关闭方向推压阀芯，以及用于沿阀打开方向推压阀芯的目标压差设定装置（31,50,51; 31B，51）。 通过将第二受压部分（27; 27A）的压力接收面积（Az）设定为大于第一压力接收部分（28; 27）的受压面积（ALS）来提供致动器（2）的阻尼能力。 28A）。

    Hydraulic drive system for hydraulic work vehicle
    9.
    发明授权
    Hydraulic drive system for hydraulic work vehicle 有权
    液压工作车液压驱动系统

    公开(公告)号：US06220028B1

    公开(公告)日：2001-04-24

    申请号：US09204068

    申请日：1998-12-03

    申请人： Kouji Ishikawa ,  Toichi Hirata ,  Genroku Sugiyama ,  Tsukasa Toyooka ,  Tsuyoshi Nakamura ,  Yasuharu Gotou

    发明人： Kouji Ishikawa ,  Toichi Hirata ,  Genroku Sugiyama ,  Tsukasa Toyooka ,  Tsuyoshi Nakamura ,  Yasuharu Gotou

    IPC分类号： F16D3102

    CPC分类号： E02F9/2296 ,  B60W2710/0644 ,  E02F9/2235 ,  E02F9/2246 ,  E02F9/26

    摘要： A hydraulic drive system is provided with a signal guide system for guiding a delivery pressure of a pump as a command pressure via a line and a port, another signal guide system for guiding a pilot pressure of a pilot pump as another command pressure via a line and a port, a tilting control unit for controlling the displacement of the pump by the command pressures guided to the ports, a controller having a command current-setting unit for setting a relationship between a target engine speed and a command current, a target engine speed-indicating unit for an engine, and a solenoid-operated proportional valve for allowing the pilot pressure of the line to pass as is while no drive signal is outputted from the controller but for being reduced in opening to change the pilot pressure to a smaller value when a drive signal is outputted from the controller.

    摘要翻译： 液压驱动系统设置有信号引导系统，用于经由管线和端口引导泵的输送压力作为指令压力，另一个信号引导系统用于通过管线引导先导泵的先导压力作为另一个指令压力 以及端口，倾斜控制单元，用于通过被引导到端口的指令压力来控制泵的排量;控制器，具有用于设定目标发动机转速和指令电流之间的关系的指令电流设定单元，目标发动机 用于发动机的速度指示单元和用于允许线路的先导压力在没有驱动信号从控制器输出但为了减小开启以将先导压力改变为更小的电磁比例阀 当从控制器输出驱动信号时的值。

    Hydraulic control system for construction machine
    10.
    发明授权
    Hydraulic control system for construction machine 失效
    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。