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公开(公告)号：US5150574A
公开(公告)日：1992-09-29
申请号：US573138
申请日：1990-09-24
申请人： Toichi Hirata , Hideaki Tanaka , Genroku Sugiyama , Yusuke Kajita
发明人： Toichi Hirata , Hideaki Tanaka , Genroku Sugiyama , Yusuke Kajita
CPC分类号： F15B13/0417 , E02F9/2232 , E02F9/2296
摘要： A hydraulic drive system for a construction machine has a flow control valve (5) disposed between a hydraulic pump and an acutator, a pressure compensating valve for controlling a differential pressure across the flow control valve, and a pump delivery rate regulator 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 valve body subjected to control forces. A first control force based on the differential pressure across the flow control valve to the valve body urges the valve body in the valve-closing direction. A second predetermined control force urges the valve body in the valve-operating direction; and a third control force based on the differential pressure (Pd-PLS) between the pump pressure and the load pressure of the actuator urges the valve body in the valve-opening direction.
摘要翻译： PCT No.PCT / JP90 / 00573 Sec。 371 1990年9月24日第 102（e）1990年9月24日PCT PCT 1990年5月1日PCT公布。 WO90 / 13748 PCT公开 日本1990年11月15日。一种用于建筑机械的液压驱动系统具有设置在液压泵和辅助器之间的流量控制阀（5），用于控制流量控制阀两端的压差的压力补偿阀，以及泵 输送速率调节器，用于根据泵压力和致动器的负载压力之间的差压（Pd-PLS）控制从液压泵输送的液压流体的流量。 压力补偿阀具有经受控制力的阀体。 基于流量控制阀与阀体两端的差压的第一控制力在阀关闭方向上推动阀体。 第二预定控制力促使阀体处于阀操作方向; 并且基于泵压力和致动器的负载压力之间的差压（Pd-PLS）的第三控制力促使阀体沿阀打开方向。
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公开(公告)号：US5005358A
公开(公告)日：1991-04-09
申请号：US349851
申请日：1989-05-10
申请人： Toichi Hirata , Hideaki Tanaka , Genroku Sugiyama , Yusuke Kajita
发明人： Toichi Hirata , Hideaki Tanaka , Genroku Sugiyama , Yusuke Kajita
CPC分类号： E02F9/225 , B62D11/18 , E02F9/2296 , F15B11/165 , F15B13/0417 , F15B2211/20553 , F15B2211/253 , F15B2211/30515 , F15B2211/30535 , F15B2211/3111 , F15B2211/329 , F15B2211/351 , F15B2211/40515 , F15B2211/40569 , F15B2211/41581 , F15B2211/4159 , F15B2211/428 , F15B2211/45 , F15B2211/46 , F15B2211/5059 , F15B2211/6052 , F15B2211/6054 , F15B2211/6058 , F15B2211/6355 , F15B2211/7058 , F15B2211/71
摘要： A hydraulic drive system for a crawler-mounted construction vehicle includes: a hydraulic pump (1); a plurality of hydraulic actuators including traveling hydraulic motors (2, 3) driven by the hydraulic pump; a plurality of flow control valve means including first and second flow control valve means (15, 16; 35, 36) for respectively controlling the flow rates of the hydraulic fluid supplied from the pump to motors; pump controlling means (11) for effecting control during the driving of the motors in such a manner that the discharge pressure of the pump becomes higher by a fixed value than the higher one of load pressures of the motors; and first and second pressure balance valve means (17, 18; 37, 38) for respectively controlling the rates of flow through the flow control valve means during the driving of the motors in such a manner that the load pressures of the motors do not affect the rates of flow through the first and second flow control valve means. The first and second pressure balance valve means (17, 18; 37, 38) are respectively provided with valve control means (62, 63; 66, 67 ) which do not cause the associated pressure balance valve means to be actuated until the differential pressure between the load pressure generated in a first motor (2) and the load pressure generated in a second motor (3) reaches a predetermined value (.DELTA.P.sub.0), and causes the pressure balance valve means to be actuated when the differential pressure exceeds the predetermined value.
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公开(公告)号：US4858649A
公开(公告)日：1989-08-22
申请号：US221509
申请日：1988-04-29
IPC分类号： F15B13/042
CPC分类号： F15B13/0422 , Y10T137/86582 , Y10T137/86606
摘要： A valve apparatus (1; 50; 60, 61; 90; 100) in which at least one flow control valve (21, 22; 63, 76; 101) is incorporated in a body block (20; 62, 82), and the flow control valve is connected in pilot lines (6-9) which connect a pilot valve (2) supplied with a pilot hydraulic fluid of a predetermined pressure set by a relief valve (19) and a pilot operated directional control valve (3) actuated in response to operation of the pilot valve, to permit free flow of the hydraulic fluid from the pilot valve to the directional control valve, but to restrict flow of the hydraulic fluid from the directional control valve to the pilot valve. The body block (20; 62, 82) is formed therein with a first passage (31; 52; 68, 81) connected to a return line (14; 71, 72, 86) for the relief valve (19).
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公开(公告)号：US4753158A
公开(公告)日：1988-06-28
申请号：US904119
申请日：1986-09-05
申请人： Toichi Hirata , Genroku Sugiyama , Shinichi Satoh
发明人： Toichi Hirata , Genroku Sugiyama , Shinichi Satoh
IPC分类号： E02F9/22 , F15B13/042 , F15B9/08
CPC分类号： E02F9/2285 , F15B13/0422
摘要： A pilot hydraulic system comprises a directional control valve having at least one pilot chamber for controlling the operation of a hydraulic actuator; and a pilot valve connected through a pilot line to the pilot chamber of the directional control valve for operation thereof. The pilot line includes a flow control valve which allows a free flow of hydraulic fluid from the pilot valve to the directional control valve while limiting a flow of hydraulic fluid from the directional control valve to the pilot valve.
摘要翻译： 一个先导液压系统包括方向控制阀，该方向控制阀具有用于控制液压致动器操作的至少一个先导室; 以及通过先导管路连接到方向控制阀的先导室的先导阀，用于操作。 先导管路包括流量控制阀，其允许液压流体从先导阀自由流动到方向控制阀，同时限制液压流体从方向控制阀到先导阀的流动。
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公开(公告)号：US4697418A
公开(公告)日：1987-10-06
申请号：US904118
申请日：1986-09-05
申请人： Nobuya Okabe , Toichi Hirata , Kuniaki Yoshida , Genroku Sugiyama , Masakazu Haga , Hideaki Tanaka , Akira Tatsumi
发明人： Nobuya Okabe , Toichi Hirata , Kuniaki Yoshida , Genroku Sugiyama , Masakazu Haga , Hideaki Tanaka , Akira Tatsumi
CPC分类号： E02F9/2246 , B60W10/06 , B60W10/30 , B60W30/188 , E02F9/2235 , E02F9/2282 , E02F9/2292 , E02F9/2296 , B60W2300/17 , B60W2510/0638 , B60W2510/30 , B60W2540/04 , B60W2710/0644 , B60W2710/30
摘要： A control system for a hydraulic excavator having a prime mover, revolution number control device for the prime mover, at least one variable displacement hydraulic pump driven by the prime mover, displacement volume control device for the pump, actuators driven by pressurized fluid discharged from the pump and working elements driven by the respective actuators. The control system includes maximum revolution number altering device for the prime mover associated with the revolution number control device, maximum displacement volume altering device for the pump associated with the displacement volume control devices, devices for sensing the operation condition of the actuators, devices for selecting an operation mode for each working element and control devices. The maximum revolution number altering device provides at least one maximum revolution number of the prime mover and the maximum displacement volume altering device provides at least one maximum displacement volume so that maximum revolution numbers of the prime mover and maximum displacement volumes are arranged in a plurality of combinations. The plurality of combinations are set in association with the operation condition of the actuators and the selection of the operation mode. The control means selects a combination of the maximum revolution number of the prime mover and the maximum displacement volume of the pumps on basis of output signals of the sensors and selection devices and drives the maximum revolution number altering device and the maximum displacement volume altering device to set the maximum revolution number of the prime mover and the maximum displacement volume of the hydraulic pump.
摘要翻译： 一种用于液压挖掘机的控制系统，具有用于原动机的原动机，转数控制装置，由原动机驱动的至少一个可变排量液压泵，用于泵的排量体积控制装置，由从 泵和工作元件由相应的致动器驱动。 控制系统包括与转数控制装置相关联的原动机的最大转数改变装置，与排量体积控制装置相关联的泵的最大排量变化装置，用于感测致动器的操作状态的装置，用于选择的装置 每个工作元件和控制装置的操作模式。 最大转数改变装置提供原动机的至少一个最大转速，并且最大排量改变装置提供至少一个最大排量，使得原动机和最大排量的最大转数排列成多个 组合。 多个组合与致动器的操作条件和操作模式的选择相关联地设置。 控制装置基于传感器和选择装置的输出信号选择原动机的最大转数与泵的最大排量之间的组合，并将最大转数改变装置和最大排量变更装置驱动到 设定原动机的最大转数和液压泵的最大排量。
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公开(公告)号：US20060113140A1
公开(公告)日：2006-06-01
申请号：US10541450
申请日：2004-07-30
IPC分类号： B60K17/00
CPC分类号： F02D41/021 , E02F9/2246 , F02D29/02 , F02D31/001
摘要： A traveling hydraulic working machine has input means for commanding a target revolution speed of an engine and detection means for detecting an operating situation of a hydraulic actuator and an operating situation of traveling means. A prime-mover revolution speed control means modifies the target revolution speed of the prime mover when the operating situation of the hydraulic actuator and the operating situation of the traveling means 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用于指示发动机的目标转速的输入装置和用于检测液压致动器的运行状况的检测装置和行驶装置的运行状况。 原动机转速控制装置在液压致动器的运行状态和行驶装置的运转状态成为各自的特定状态时，修正原动机的目标转速，并控制原动机的转速。 通过行走液压作业机，在液压执行器的行驶和加工的组合操作中，可以根据操作者所期望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。
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公开(公告)号：US07512471B2
公开(公告)日：2009-03-31
申请号：US10545322
申请日：2004-08-10
CPC分类号： E02F9/2296 , B60W10/04 , B60W10/06 , B60W10/103 , B60W10/30 , B60W30/1819 , B60W30/1882 , B60Y2200/415 , E02F9/2235 , E02F9/2246 , F02D29/02 , F02D2250/18 , F04B49/065 , F04B2203/0603 , F04B2203/0605 , F16H61/46 , F16H61/468
摘要： The invention provides a control system for a working vehicle, which can realize higher work performance and better fuel economy in a compatible way. A controller 10 includes table 10a, 10b and tables 10e, 10f for deciding maximum pump absorption torques and engine output torques based on an engine revolution speed, and selectors 10c, 10g for switching over the decided maximum pump absorption torques and engine output torques depending on a work performance mode or a fuel economy mode is selected. A pump absorption torque characteristic for the fuel economy mode is set so as to provide a relative small maximum pump absorption torques TB in a high revolution range, and an engine output characteristic for the fuel economy mode is set so as to provide a relatively small engine output torque in the high revolution range.
摘要翻译： 本发明提供一种用于工作车辆的控制系统，其可以以兼容的方式实现更高的工作性能和更好的燃料经济性。 控制器10包括用于基于发动机转速决定最大泵吸收扭矩和发动机输出转矩的表10a，10b和表10e，10f，以及用于切换所决定的最大泵吸收转矩和根据发动机输出转矩的发动机输出转矩的选择器10c， 选择工作性能模式或燃料经济模式。 设定用于燃料经济性模式的泵吸收扭矩特性，以便在高转速范围内提供相对较小的最大泵吸收扭矩TB，并且设定用于燃料经济性模式的发动机输出特性以便提供相对较小的发动机 输出转矩在高转速范围内。
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公开(公告)号：US20090090103A1
公开(公告)日：2009-04-09
申请号：US11915041
申请日：2006-05-25
IPC分类号： F15B15/00
CPC分类号： F16H47/02 , F04B23/06 , F16H2039/005 , F16H2047/025
摘要： A hydraulic drive system is provided with a front casing 50 and a rear ceasing 51. The front casing 50 is formed of a single member, and accommodates therein rotary members, which include a cylinder block 30A and the like, and a part of an output shaft 36 of a hydraulic motor 30 and rotary members, which include a cylinder block 31A and the like, and a part of an output shaft 32 of a hydraulic motor 31. The rear casing 51 is joined to the front casing 50, and has a ports plate 30C and a ports plate 31C arranged therein. The rear casing 51 has an oilway 52 communicating to a first port 30C1 of the ports plate 30C, an oilway 53 communicating to the oilway 52 and also communicating to a first port 31C1 of the ports plate 31C, an oilway 54 communicating to a second port 30C2 of the ports plate 30C, and an oilway 55 communicating to the oilway 54 and also communicating to a second port 31C2 of the ports plate 31C.
摘要翻译： 液压驱动系统设置有前壳体50和后挡块51.前壳体50由单个构件形成，并且容纳在其中的包括气缸体30A等的旋转构件和一部分输出 液压马达30的轴36和包括气缸体31A等的旋转构件和液压马达31的输出轴32的一部分。后壳体51接合到前壳体50，并且具有 端口板30C和布置在其中的端口板31C。 后壳体51具有与端口板30C的第一端口30C1连通的油路52，与油路52连通并且还与端口板31C的第一端口31C1连通的油路53，与第一端口连通的油路54 30C2，以及与油路54连通的油路55，并与端口板31C的第二端口31C2连通。
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公开(公告)号：US07434394B2
公开(公告)日：2008-10-14
申请号：US10553414
申请日：2004-04-16
CPC分类号： E02F9/2235 , E02F9/2285 , E02F9/2296
摘要： To permit using hold-side pressure oil in a first hydraulic cylinder for the acceleration of a second hydraulic cylinder upon performing a combined operation of the first and second hydraulic cylinders, a hydraulic drive system is provided with a main hydraulic pump 21, a boom cylinder 6 and an arm cylinder 7, a directional control valve 23 for a boom and a directional control valve 24 for an arm, and a boom control device 25 and an arm control device 26. The hydraulic drive system is also provided with a pressure oil feed means for feeding pressure oil in a rod chamber 6b of the boom cylinder 6 to an upstream side of the directional control valve 24 for the arm when a bottom pressure of the arm cylinder 7 has increased to a high pressure equal to or higher than a predetermined pressure. This pressure oil feed means includes a flow combiner valve 44 arranged in a reservoir line 42 which can communicate to the rod chamber 6b of the boom cylinder 6. When the bottom pressure of the arm cylinder 7 is the predetermined pressure or higher, the flow combiner valve 44 maintains a communication line 40, which communicates the reservoir line 42 and the upstream side of the directional control valve 24 for the arm with each other, in a state that pressure oil can be fed to the upstream side of the directional control valve 24 for the arm.
摘要翻译： 为了在执行第一和第二液压缸的组合操作时允许在第一液压缸中使用保持侧压力油来加速第二液压缸，液压驱动系统设置有主液压泵21，动臂缸 悬臂气缸7，用于悬臂的方向控制阀23和用于臂的方向控制阀24，以及起重臂控制装置25和臂控制装置26。 液压驱动系统还设置有压力油进给装置，用于当臂缸7的底部压力向臂的方向控制阀24的上游侧供给动臂缸6的杆室6b中的压力油时 已经增加到等于或高于预定压力的高压。 该压力供油装置包括设置在储存管路42中的流动组合器阀44，该储存管路42可与动臂缸6的杆室6b连通。 当气缸7的底部压力为预定压力或更高压力时，组合阀44保持连通管路40，该连通管路40将储存管路42和臂的方向控制阀24的上游侧彼此连通， 在压力油可以供给到用于臂的方向控制阀24的上游侧的状态下。
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公开(公告)号：US20070028607A1
公开(公告)日：2007-02-08
申请号：US10553414
申请日：2004-04-16
IPC分类号： F03C1/00
CPC分类号： E02F9/2235 , E02F9/2285 , E02F9/2296
摘要： To permit using hold-side pressure oil in a first hydraulic cylinder for the acceleration of a second hydraulic cylinder upon performing a combined operation of the first and second hydraulic cylinders, a hydraulic drive system is provided with a main hydraulic pump 21, a boom cylinder 6 and an arm cylinder 7, a directional control valve 23 for a boom and a directional control valve 24 for an arm, and a boom control device 25 and an arm control device 26. The hydraulic drive system is also provided with a pressure oil feed means for feeding pressure oil in a rod chamber 6b of the boom cylinder 6 to an upstream side of the directional control valve 24 for the arm when a bottom pressure of the arm cylinder 7 has increased to a high pressure equal to or higher than a predetermined pressure. This pressure oil feed means includes a flow combiner valve 44 arranged in a reservoir line 42 which can communicate to the rod chamber 6b of the boom cylinder 6. When the bottom pressure of the arm cylinder 7 is the predetermined pressure or higher, the flow combiner valve 44 maintains a communication line 40, which communicates the reservoir line 42 and the upstream side of the directional control valve 24 for the arm with each other, in a state that pressure oil can be fed to the upstream side of the directional control valve 24 for the arm.
摘要翻译： 为了在执行第一和第二液压缸的组合操作时允许在第一液压缸中使用保持侧压力油来加速第二液压缸，液压驱动系统设置有主液压泵21，动臂缸 悬臂气缸7，用于悬臂的方向控制阀23和用于臂的方向控制阀24，以及悬臂控制装置25和臂控制装置26.液压驱动系统还设有压力油进给 用于当臂缸7的底部压力增加到等于或高于其的高压时将臂架缸6的杆室6b中的压力油供给到用于臂的方向控制阀24的上游侧的装置 预定压力。 该压力供油装置包括配置在储存管路42中的流动组合器阀44，其可与臂缸6的杆室6b连通。当臂缸7的底部压力为预定压力或更高时， 组合阀44保持连通管线40，该连通管线40在压力油可以被供给到方向控制阀的上游侧的状态下将储存管路42和用于臂的方向控制阀24的上游侧彼此连通 24为手臂。
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