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1. 发明申请

US20190112786A1 Pump Control System of Work Machine 审中-公开
公开(公告)号：US20190112786A1
公开(公告)日：2019-04-18
申请号：US15755773
申请日：2016-09-28
申请人： Hitachi Construction Machinery Co., Ltd.
发明人： Shinji NISHIKAWA , Shinya IMURA , Hidekazu MORIKI , Hiroaki AMANO
IPC分类号： E02F9/22 , F04B49/06 , F15B11/028
CPC分类号： E02F9/2232 , E02F9/22 , E02F9/2267 , F04B49/06 , F15B11/028 , F15B11/08 , F15B21/087 , F15B2211/20523 , F15B2211/20553 , F15B2211/30535 , F15B2211/327 , F15B2211/329 , F15B2211/6054 , F15B2211/6309 , F15B2211/6313 , F15B2211/6316 , F15B2211/6355 , F15B2211/6652 , F15B2211/6654 , F15B2211/6655
摘要： A work machine pump control system includes: a pump horsepower control valve (22) which causes a first urging force determining a limited horsepower (F) of a hydraulic pump and a second urging force due to a delivery pressure of the hydraulic pump to act on a spool in opposition to each other and which controls the pump flow rate such that it does not exceed the limited horsepower (F); a target pump flow rate computation section (42) computing a target pump flow rate based on an operation pressure (px) and a load pressure (py); a target horsepower computation section (41) which computes a required horsepower (Freq) corresponding to an operation pressure (px) from a relationship related to the operation pressure (px) and which computes a target horsepower (Ftar) based on the required horsepower (Freq); and a pump horsepower control section (35) which controls the pump horsepower control valve (22) such that the target pump flow rate (Qtar) is delivered with the limited horsepower (F) determined by the pump horsepower control valve (22).

2. 发明申请

US20170307096A1 THREE-WAY PRESSURE CONTROL AND FLOW REGULATOR VALVE 审中-公开
公开(公告)号：US20170307096A1
公开(公告)日：2017-10-26
申请号：US15474310
申请日：2017-03-30
申请人： Parker-Hannifin Corporation
发明人： James P. Janecke
IPC分类号： F16K17/22 , F16K31/12 , F16K11/10
CPC分类号： F16K17/22 , F15B13/0402 , F15B13/0417 , F15B2211/30535 , F15B2211/50518 , F15B2211/50554 , F15B2211/6055 , F16K11/07 , F16K11/10 , F16K31/12
摘要： A three-way valve assembly, including a valve body having a fluid flow path and a valve member movable in the fluid flow path between a supply port and a work port, and between a load sense passage and a pressure relief port. The valve member may move between a first position and a second position for controlling flow and regulating fluid pressure differences sensed in the flow path; and for limiting fluid pressure in the flow path to a predetermined pressure level set by a pilot-operated pressure limiter valve when the valve member is in the second position. The valve member may move between the second position and a third position to open the flow path from the load sense passage to the pressure relief port for relieving fluid pressure in the flow path when the fluid pressure from an over-loaded actuator exceeds the predetermined pressure level set by the pressure limiter valve.

3. 发明授权

US09790661B2 Hydraulic system having dual tilt blade control 有权
公开(公告)号：US09790661B2
公开(公告)日：2017-10-17
申请号：US14551569
申请日：2014-11-24
申请人： Caterpillar Inc.
发明人： Timothy L. Hand , Heather Armistead , Fuaad Sayeed , Srikalyan C. Puranam , Stephen Garnett
IPC分类号： E02F3/84 , F15B13/04 , E02F9/22 , F15B13/043 , E02F3/815 , E02F9/20 , F15B11/16 , E02F3/76
CPC分类号： E02F3/844 , E02F3/7609 , E02F3/815 , E02F3/845 , E02F9/2004 , E02F9/2235 , E02F9/2285 , E02F9/2296 , F15B11/163 , F15B13/0416 , F15B13/043 , F15B2211/30535 , F15B2211/3111 , F15B2211/3144 , F15B2211/329 , F15B2211/6054
摘要： A hydraulic system for a machine is disclosed. The hydraulic system may have a tank configured to hold a supply of fluid, a pump configured to draw fluid from the tank and pressurize the fluid, a first cylinder operatively connected between a first side of a work tool and an undercarriage of the machine, and a second cylinder operatively connected between a second side of the work tool and the undercarriage of the machine. The hydraulic system may also have a first electro-hydraulic valve associated with the first cylinder and configured to selectively regulate a flow of pressurized fluid to the first cylinder independently of the second cylinder, and a second electro-hydraulic valve associated with the second cylinder and configured to selectively regulate a flow of pressurized fluid to the second cylinder independently of the first cylinder.

4. 发明申请

US20160312807A1 Hydraulic System Including Independent Metering Valve with Flowsharing 有权
标题翻译：包括具有流量分配的独立计量阀的液压系统
公开(公告)号：US20160312807A1
公开(公告)日：2016-10-27
申请号：US14696869
申请日：2015-04-27
申请人： Caterpillar Inc.
发明人： Andrew J. Kleitsch , Pengfei Ma , Jason L. Brinkman , Mikhail Sorokin
IPC分类号： F15B11/028
CPC分类号： F15B11/165 , E02F9/2228 , F15B11/006 , F15B11/163 , F15B2211/20553 , F15B2211/20576 , F15B2211/30535 , F15B2211/30555 , F15B2211/30575 , F15B2211/61 , F15B2211/6313 , F15B2211/6316 , F15B2211/6346 , F15B2211/6355 , F15B2211/6652 , F15B2211/6654 , F15B2211/7142
摘要： An independent metering valve circuit includes an actuator, a set of independent metering valves, an independent metering valve pre-compensator, an inverse resolver, and a signal conditioning element. The set of independent metering valves are fluidly coupled to the actuator and configured to independently control a flow of a hydraulic fluid to the actuator. The independent metering valve pre-compensator is configured to control the flow of the hydraulic fluid to the set of independent metering valves. The inverse resolver is configured to receive a first pressure signal from the independent metering valve circuit and a second pressure signal from a load-sense hydraulic system and output a third pressure signal. The signal conditioning element is configured to receive the third pressure signal and output a forth pressure signal configured to control a pump fluidly coupled to the load-sense hydraulic system and the independent metering valve circuit.
摘要翻译：独立的计量阀电路包括致动器，一组独立计量阀，独立计量阀预补偿器，逆解算器和信号调节元件。该组独立计量阀流体地联接到致动器并且构造成独立地控制液压流体到致动器的流动。独立的计量阀预补偿器构造成控制液压流体流向该组独立的计量阀。逆解算器被配置为接收来自独立计量阀电路的第一压力信号和来自负载感测液压系统的第二压力信号并输出第三压力信号。信号调节元件构造成接收第三压力信号并输出配置成控制流体耦合到负载感测液压系统和独立计量阀回路的泵的第四压力信号。

5. 发明申请

US20160115974A1 HYDRAULIC DRIVE SYSTEM FOR CONSTRUCTION MACHINE 审中-公开
标题翻译：液压驱动系统
公开(公告)号：US20160115974A1
公开(公告)日：2016-04-28
申请号：US14769922
申请日：2014-04-21
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
发明人： Kiwamu Takahashi , Yasutaka Tsuruga , Yoshifumi Takebayashi , Kazushige Mori , Natsuki Nakamura
IPC分类号： F15B11/17 , E02F3/42 , E02F9/22
CPC分类号： F15B11/17 , E02F3/325 , E02F3/425 , E02F9/2239 , E02F9/2267 , E02F9/2292 , E02F9/2296 , F15B2211/20576 , F15B2211/20584 , F15B2211/255 , F15B2211/2654 , F15B2211/2656 , F15B2211/30535 , F15B2211/30565 , F15B2211/31535 , F15B2211/41518 , F15B2211/465 , F15B2211/7135 , F15B2211/7142
摘要： To cope with a variety of flow rate balance required of two actuators flexibly in combined operations driving two actuators of high maximum demanded flow rates at the same time while suppressing the wasteful energy consumption caused by the throttle pressure loss in a pressure compensating valve, the arrangement is such that when the demanded flow rate of a boom cylinder 3a is lower than a prescribed flow rate, the boom cylinder 3a is driven only by hydraulic fluid delivered from a single flow type main pump 202 and when the demanded flow rate of the boom cylinder 3a is higher than the prescribed flow rate, the hydraulic fluid delivered from the single flow type main pump 202 and hydraulic fluid delivered from a first delivery port 102a of a split flow type main pump 102 are merged together and the boom cylinder 3a is driven by the merged fluids. Further, when the demanded flow rate of an arm cylinder 3b is lower than a prescribed flow rate, the arm cylinder 3b is driven only by hydraulic fluid delivered from a second delivery port 102b of the split flow type main pump 102 and when the demanded flow rate of the arm cylinder 3b is higher than the prescribed flow rate, hydraulic fluid delivered from the first delivery port 102a and hydraulic fluid delivered from the second delivery port 102b are merged together and the arm cylinder 3b is driven by the merged fluids.
摘要翻译：为了在组合操作中灵活地应对两个致动器所需的各种流量平衡，同时驱动具有高最大需求流量的两个致动器，同时抑制由压力补偿阀中的节流阀压力损失引起的浪费的能量消耗，使得当动臂缸3a的要求流量低于规定流量时，动臂缸3a仅由从单流式主泵202输送的液压流体驱动，并且当动臂缸的要求流量 3a比规定流量高，从单流式主泵202输送的液压油和从分流式主泵102的第一输送口102a输送的液压流体合流在一起，动臂缸3a由合并液体。此外，当臂缸3b的要求流量低于规定流量时，仅由分流式主泵102的第二输送口102b输送的液压流体驱动臂缸3b，当需要流量臂缸3b的速率高于规定的流量，从第一输送口102a输送的液压流体和从第二输送口102b输送的液压流体合流在一起，并且通过合流的流体驱动臂缸3b。

6. 发明授权

US09084388B2 Hydraulic system 有权
标题翻译：液压系统
公开(公告)号：US09084388B2
公开(公告)日：2015-07-21
申请号：US13076643
申请日：2011-03-31
申请人： Marcus Bitter
发明人： Marcus Bitter
IPC分类号： F15B11/16 , A01B63/10 , F15B13/02
CPC分类号： A01B63/1013 , F15B11/162 , F15B11/165 , F15B13/022 , F15B2211/20546 , F15B2211/253 , F15B2211/30535 , F15B2211/4053 , F15B2211/6054 , F15B2211/6055 , F15B2211/71 , F15B2211/781
摘要： For controlling supply priorities, a hydraulic system includes several loads, a pump, and a tank. One load has a first-level supply priority, and optionally a second load has a second-level supply priority subordinate to the first level. A third load has a third-level supply priority subordinate to the second level. Each load can be connected to the pump by a separate supply line. The supply lines for the first and the optional second load are connected to the pump by a common load-pressure-controlled priority valve and the supply line for the third load is connected to the pump by an additional load-pressure-controlled priority valve. A first load-pressure line leading to the pump is connected to a load-pressure line of the third hydraulic load and to a second load-pressure line.
摘要翻译：为了控制供应优先级，液压系统包括多个负载，泵和罐。一个负载具有一级供应优先级，并且可选地，第二负载具有从属于第一级的二级供应优先级。第三负载具有从属于第二级的第三级供应优先级。每个负载可以通过单独的电源线连接到泵。用于第一和第二可选择的第二负载的供应管线通过公共负载压力控制的优先阀连接到泵，并且用于第三负载的供应管线通过附加的负载压力控制的优先阀门连接到泵。通向泵的第一负载压力线连接到第三液压负载的负载压力线和第二负载压力线。

7. 发明申请

US20150081179A1 HYDRAULIC SYSTEM HAVING DUAL TILT BLADE CONTROL 审中-公开
标题翻译：具有双倾斜叶片控制的液压系统
公开(公告)号：US20150081179A1
公开(公告)日：2015-03-19
申请号：US14551569
申请日：2014-11-24
申请人： Caterpillar Inc.
发明人： Timothy L. Hand , Heather Armistead , Fuaad Sayeed , Srikalyan C. Puranam , Stephen Garnett
IPC分类号： E02F3/84 , F15B11/16 , E02F3/76
CPC分类号： E02F3/844 , E02F3/7609 , E02F3/815 , E02F3/845 , E02F9/2004 , E02F9/2235 , E02F9/2285 , E02F9/2296 , F15B11/163 , F15B13/0416 , F15B13/043 , F15B2211/30535 , F15B2211/3111 , F15B2211/3144 , F15B2211/329 , F15B2211/6054
摘要： A hydraulic system for a machine is disclosed. The hydraulic system may have a tank configured to hold a supply of fluid, a pump configured to draw fluid from the tank and pressurize the fluid, a first cylinder operatively connected between a first side of a work tool and an undercarriage of the machine, and a second cylinder operatively connected between a second side of the work tool and the undercarriage of the machine. The hydraulic system may also have a first electro-hydraulic valve associated with the first cylinder and configured to selectively regulate a flow of pressurized fluid to the first cylinder independently of the second cylinder, and a second electro-hydraulic valve associated with the second cylinder and configured to selectively regulate a flow of pressurized fluid to the second cylinder independently of the first cylinder.
摘要翻译：公开了一种用于机器的液压系统。液压系统可以具有构造成保持流体供应的水箱，被配置为从罐中抽取流体并对流体加压的泵，操作地连接在工作工具的第一侧和机器的底架之间的第一缸，以及可操作地连接在工作工具的第二侧和机器的起落架之间的第二气缸。液压系统还可以具有与第一气缸相关联的第一电动液压阀，并且构造成选择性地调节与第二气缸无关的加压流体流到第一气缸，以及与第二气缸相关联的第二电动液压阀被配置成独立于第一气缸选择性地调节加压流体到第二气缸的流量。

8. 发明申请

US20150013322A1 FLUID PRESSURE CONTROL DEVICE 有权
标题翻译：流体压力控制装置
公开(公告)号：US20150013322A1
公开(公告)日：2015-01-15
申请号：US14370958
申请日：2013-01-18
申请人： KAYABA INDUSTRY CO., LTD.
发明人： Tatsuo Ito , Mitsuhiro Maesaki
IPC分类号： F15B15/08 , F15B15/20
CPC分类号： F15B15/08 , F15B11/003 , F15B11/006 , F15B15/20 , F15B2211/30515 , F15B2211/30535 , F15B2211/30575 , F15B2211/329 , F15B2211/351 , F15B2211/353 , F15B2211/7052
摘要： A fluid pressure control device includes a first control valve that switches to supply a working fluid to the pressure chamber of a cylinder on which a load pressure by the load acts so as to control the extension operation of the cylinder, a second control valve that switches to discharge the working fluid in the pressure chamber so as to control the contraction operation of the cylinder, an operate check valve that is interposed between the pressure chamber and the second control valve and that interrupts the discharge of the working fluid from the pressure chamber when the operate check valve is switched to a closed state and a pilot valve that performs, with a pilot pressure, a pilot operation on the second control valve and that switches, with the pilot pressure, the operate check valve to an opened state.
摘要翻译：流体压力控制装置包括：第一控制阀，其切换以将工作流体供应到气缸的压力室，负载上的负载压力作用在该压力室上，以控制气缸的延伸操作;第二控制阀，其切换以排出压力室中的工作流体，以便控制气缸的收缩操作;操作止回阀，介于压力室和第二控制阀之间，并且中断来自压力室的工作流体的排出，操作止回阀切换到关闭状态，并且先导阀在先导压力下执行第二控制阀的先导操作，并且在先导压力下将操作止回阀切换到打开状态。

9. 发明授权

US08857169B2 Hydraulic drive system for construction machine 有权
标题翻译：施工机械液压驱动系统
公开(公告)号：US08857169B2
公开(公告)日：2014-10-14
申请号：US13121040
申请日：2009-09-09
申请人： Kiwamu Takahashi , Yasutaka Tsuruga , Yoshifumi Takebayashi , Kazushige Mori
发明人： Kiwamu Takahashi , Yasutaka Tsuruga , Yoshifumi Takebayashi , Kazushige Mori
IPC分类号： F15B11/16 , E02F9/22
CPC分类号： E02F9/2232 , E02F9/2225 , E02F9/2285 , E02F9/2296 , F15B11/163 , F15B11/165 , F15B2211/20546 , F15B2211/253 , F15B2211/30535 , F15B2211/50518 , F15B2211/50536
摘要： A main relief valve 13 includes a biasing force altering unit 60, which constitutes, in combination with a gate lock valve 23 and a gate lock lever 24, relief pressure altering means for manually switching the relief pressure of the main relief valve 13 between a first pressure (a standard pressure of 25 MPa, for example) and a second lower pressure for engine start-up (e.g., 3.0 MPa). This allows the main relief valve 13 to return the hydraulic fluid discharged from a hydraulic pump 2 to a tank T in conjunction with an unloading valve 9 when multiple actuators 5a, 5b, . . . are not in operation under the ambient temperature below freezing point. As a result, it is possible to reduce the load on the hydraulic pump during cold engine start-up without compromising the anti-hunting characteristics of the unloading valve, thereby improving the engine start-up performance.
摘要翻译：主安全阀13包括偏压力改变单元60，该偏压力改变单元60与闸门锁定阀23和闸门锁定杆24组合，安全压力改变装置，用于手动地将主安全阀13的溢流压力切换到第一压力（例如，25MPa的标准压力）和用于发动机起动的第二较低压力（例如，3.0MPa）。这允许主安全阀13在多个致动器5a，5b，...时将与液压泵2排出的液压流体连同卸载阀9一起返回到储罐T. 。。在低于冰点的环境温度下不工作。结果，可以在冷启动时降低液压泵的负荷，而不会影响卸载阀的防狩猎特性，从而提高发动机起动性能。

10. 发明申请

US20140283676A1 Fluid Regeneration in a Hydraulic System 审中-公开
标题翻译：液压系统中的液体再生
公开(公告)号：US20140283676A1
公开(公告)日：2014-09-25
申请号：US13848580
申请日：2013-03-21
申请人： CATERPILLAR INC.
发明人： Matt Beschorner
IPC分类号： F15B15/02
CPC分类号： F15B11/024 , E02F9/2217 , E02F9/2239 , E02F9/2292 , F15B11/17 , F15B2211/20576 , F15B2211/30535 , F15B2211/30575 , F15B2211/30595 , F15B2211/7142 , F15B2211/88
摘要： A hydraulic system for a work machine may include a first hydraulic cylinder, a second hydraulic cylinder and a monospool assembly in fluid communication with the first hydraulic cylinder and the second hydraulic cylinder. The monospool assembly may facilitate at least one of a cylinder-to-cylinder regeneration flow, makeup flow and supplemental flow to at least one of the first hydraulic cylinder and the second hydraulic cylinder.
摘要翻译：用于作业机械的液压系统可以包括与第一液压缸和第二液压缸流体连通的第一液压缸，第二液压缸和单油组件。单体组件可以促进至少一个缸到缸的再生流，补给流和向第一液压缸和第二液压缸中的至少一个的辅助流。

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