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公开(公告)号：US20180128607A1
公开(公告)日：2018-05-10
申请号：US15808311
申请日：2017-11-09
申请人： Eaton Corporation
CPC分类号： F15B19/002 , F15B11/006 , F15B13/0417 , F15B19/00 , F15B19/005 , F15B19/007 , F15B21/087 , F15B2013/0409 , F15B2211/20546 , F15B2211/30575 , F15B2211/455 , F15B2211/46 , F15B2211/6313 , F15B2211/634 , F15B2211/6346 , F15B2211/6656 , F15B2211/7053 , F15B2211/7058 , F15B2211/761 , F15B2211/855 , F15B2211/857 , F15B2211/87 , G01F1/36 , G01F15/005
摘要： Systems and methods for estimating the area ratio of an actuator in static and dynamic states are disclosed. In one aspect, a metering valve is connected to each side of the actuator. In one example, one metering valve is held closed while the other metering valve incrementally pressurizes the actuator in discrete steps. The resulting work port pressures can be used to determine the actuator area ratio. Where counterbalance valves are installed in the system, the pressurizing metering valve can be placed in a pressure control mode to obtain the desired pressure values. In one example, the ratio of flows through each metering valve is used to determine the actuator ratio.
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公开(公告)号：US09932999B2
公开(公告)日：2018-04-03
申请号：US14443471
申请日：2013-11-19
发明人： Koji Ueda
CPC分类号： F15B21/14 , E02F9/14 , E02F9/2217 , E02F9/2285 , E02F9/2289 , E02F9/2292 , E02F9/268 , F15B2211/20576 , F15B2211/30505 , F15B2211/3157 , F15B2211/41527 , F15B2211/41581 , F15B2211/426 , F15B2211/46 , F15B2211/611 , F15B2211/6316 , F15B2211/7142 , F15B2211/761 , F15B2211/88
摘要： A hydraulic circuit changeable between a state of executing a regeneration action and a state of stopping the regeneration action. The hydraulic circuit includes hydraulic pumps; a plurality of hydraulic actuators; a plurality of control valves provided for respective hydraulic actuators; a regeneration line through which return oil returned from a specific hydraulic actuator of the hydraulic actuators to a tank is supplied to a regeneration target; a regeneration valve; a meter-out valve; and a flow-path selection device selecting a flow path for the return oil from a first flow path supplying the return oil to the regeneration line to cause the regeneration action and a second flow path supplying the return oil to the control valve for the specific hydraulic actuator to stop the regeneration action.
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公开(公告)号：US20170363122A1
公开(公告)日：2017-12-21
申请号：US15624570
申请日：2017-06-15
IPC分类号： F15B21/14 , F15B1/02 , F15B11/16 , F15B1/033 , F15B11/044
CPC分类号： F15B21/14 , F15B1/024 , F15B1/033 , F15B11/044 , F15B11/16 , F15B2211/20546 , F15B2211/212 , F15B2211/31541 , F15B2211/31588 , F15B2211/41581 , F15B2211/46 , F15B2211/50545 , F15B2211/5159 , F15B2211/6306 , F15B2211/6313 , F15B2211/632 , F15B2211/6336 , F15B2211/6343 , F15B2211/7053 , F15B2211/71 , F15B2211/7107 , F15B2211/75 , F15B2211/761 , F15B2211/88
摘要： An apparatus for recuperating hydraulic energy in a working machine includes at least one first differential cylinder piston device with a differential cylinder and separate rod and bottom sides, and at least one hydraulic accumulator which is hydraulically connectable with the differential cylinder piston device. The potential energy of the differential cylinder piston device retracting under pressing load is at least partly storable in the hydraulic accumulator. The rod and bottom sides are connectable with each other via at least one brake valve for recirculating hydraulic fluid from the bottom side into the rod side.
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公开(公告)号：US09835179B2
公开(公告)日：2017-12-05
申请号：US14785887
申请日：2014-03-31
发明人： Frede Callesen , Dirk Wroblewski
CPC分类号： F15B11/024 , F15B15/149 , F15B2011/0246 , F15B2211/30565 , F15B2211/351 , F15B2211/353 , F15B2211/6306 , F15B2211/6309 , F15B2211/6313 , F15B2211/665 , F15B2211/6654 , F15B2211/7053 , F15B2211/761 , F16K3/0254 , G05D7/0652 , G05D16/204
摘要： A hydraulic valve arrangement (1) is provided comprising comprising a supply port arrangement having a high pressure port (2) and a low pressure port (4), a working port arrangement having two working ports (6, 7), a first valve (13) arranged between said high pressure port (2) and said working port arrangement (6, 7), a second valve (14) arranged between said low pressure port (4) and said working port arrangement (6, 7), a controller (19) for controlling said first valve (13) and said second valve (14), said controller (19) having an input connection (20) for receiving a signal of an operator input device, and a regenerative flow path which can be established by means of at least one of said first valve (13) and said second valve (14). The function of such a hydraulic valve arrangement should be enhanced. To this end said controller (19) said controller interrupts said regenerative flow path when a feed pressure at said working port arrangement (6, 7) exceeds a predetermined pressure level.
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公开(公告)号：US09809957B2
公开(公告)日：2017-11-07
申请号：US14122027
申请日：2011-05-23
申请人： Marcus Rösth
发明人： Marcus Rösth
CPC分类号： E02F9/2217 , E02F9/2296 , F15B1/024 , F15B1/033 , F15B21/14 , F15B2211/20546 , F15B2211/20569 , F15B2211/212 , F15B2211/30575 , F15B2211/31 , F15B2211/327 , F15B2211/6346 , F15B2211/7053 , F15B2211/761 , F15B2211/88
摘要： The object of the present invention is to provide an inventive energy recovery method for a hydraulic system comprising a hydraulic cylinder (1), a pump (2), a tank (3), a supply conduit (4), a return conduit (5), and a hydraulic accumulator (7), the method comprises the steps of charging said hydraulic accumulator (7), and storing fluid in said hydraulic accumulator (7), wherein said energy recovery method comprises the step of directing fluid from said hydraulic accumulator (7) into an expanding chamber (8, 9) of said hydraulic cylinder (1) during an overrunning load condition.
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公开(公告)号：US20170314233A1
公开(公告)日：2017-11-02
申请号：US15518265
申请日：2015-07-22
申请人： KYB Corporation
CPC分类号： E02F9/2091 , E02F9/2217 , E02F9/2239 , E02F9/2242 , E02F9/2271 , E02F9/2292 , E02F9/2296 , F15B11/02 , F15B21/14 , F15B2211/20515 , F15B2211/20546 , F15B2211/20576 , F15B2211/40515 , F15B2211/426 , F15B2211/6316 , F15B2211/633 , F15B2211/6652 , F15B2211/761 , F15B2211/88 , H02K7/1807
摘要： A control system of a hybrid construction machine includes fluid pressure pumps, a regeneration motor, a rotating electric motor coupled to the regeneration motor, a storage battery configured to store electric power generated by the rotating electric motor, an assist pump provided coaxially to the regeneration motor to be driven by the rotating electric motor, the assist pump being configured to supply a working fluid to a fluid pressure actuator, and load adjusting units configured to change a load of the assist pump in accordance with a state of the storage battery.
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公开(公告)号：US09702118B2
公开(公告)日：2017-07-11
申请号：US14547672
申请日：2014-11-19
申请人： Caterpillar Inc.
CPC分类号： E02F9/2225 , E02F3/32 , E02F9/0866 , E02F9/2217 , E02F9/2246 , E02F9/2285 , E02F9/2296 , F15B1/024 , F15B21/14 , F15B2211/212 , F15B2211/329 , F15B2211/353 , F15B2211/355 , F15B2211/6355 , F15B2211/67 , F15B2211/7058 , F15B2211/7135 , F15B2211/761
摘要： A hydraulic system is disclosed for use with a machine. The hydraulic system may have a pump configured to pressurize fluid, a first actuator configured to receive pressurized fluid from the pump, and an accumulator configured to receive fluid from the first actuator. The hydraulic system may also have a second actuator configured to receive pressurized fluid from the pump and the accumulator, and a pilot circuit configured to receive pressurized fluid from the pump and the accumulator. The hydraulic system may further have at least one valve movable to provide priority of fluid flow from the accumulator to the pilot circuit over the second actuator when a pressure of the accumulator is less than a low-pressure threshold.
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公开(公告)号：US20170184139A1
公开(公告)日：2017-06-29
申请号：US15312959
申请日：2015-05-15
发明人： Vivek BHASKAR , Bjoern ERIKSSON , Ralf GOMM
CPC分类号： F15B21/087 , E02F3/32 , E02F9/2095 , E02F9/2203 , E02F9/2217 , E02F9/2228 , E02F9/2271 , E02F9/2289 , F15B7/006 , F15B11/024 , F15B11/08 , F15B13/028 , F15B13/0401 , F15B19/005 , F15B2211/20515 , F15B2211/20538 , F15B2211/20561 , F15B2211/27 , F15B2211/30515 , F15B2211/3052 , F15B2211/3058 , F15B2211/41581 , F15B2211/613 , F15B2211/63 , F15B2211/6336 , F15B2211/634 , F15B2211/6346 , F15B2211/7051 , F15B2211/7053 , F15B2211/761
摘要： An electro-hydraulic actuation system includes a regeneration valve in fluid communication with a first fluid chamber and a second fluid chamber of a hydraulic actuator, and a dump valve is in fluid communication with the second fluid chamber and a fluid reservoir. A pump provides a flow of fluid to the first and second fluid chambers, a displacement of the pump controlling a velocity of the actuator during motion in the retraction and extension directions. An electric motor drives the pump, and a controller controls a state of the regeneration valve and the dump valve. At least one feedback device senses a system condition and provides a respective feedback signal indicative of the sensed system condition to the controller, the controller responsive to the feedback signal to determine an occurrence of an over-center load condition and control a state of the regeneration valve and the dump valve in response to the occurrence to maintain the velocity of the actuator.
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公开(公告)号：US09677572B2
公开(公告)日：2017-06-13
申请号：US14981977
申请日：2015-12-29
申请人： Caterpillar Inc.
CPC分类号： F15B1/024 , F15B1/027 , F15B21/14 , F15B2211/20546 , F15B2211/212 , F15B2211/3058 , F15B2211/41572 , F15B2211/761 , F15B2211/88 , Y02P80/13
摘要： A method for storing and reusing hydraulic energy in a machine is disclosed. The method includes transferring the hydraulic energy from an actuator to an upstream side of a motor pump via a first valve, during a normal mode. The method includes directing excess hydraulic energy from a downstream side of the motor pump to an accumulator by opening an accumulator valve and closing a bypass valve, during an energy saving mode. The method includes retrieving stored hydraulic energy from the accumulator to the upstream side of the motor pump by opening the accumulator valve, during an energy discharging mode.
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公开(公告)号：US09625080B1
公开(公告)日：2017-04-18
申请号：US14312275
申请日：2014-06-23
申请人： Stephen A. Youngers , Neil J. Youngers , James J. Youngers , Patrick L. Emerson , Stephen P. Dooley
发明人： Stephen A. Youngers , Neil J. Youngers , James J. Youngers , Patrick L. Emerson , Stephen P. Dooley
CPC分类号： F16M7/00 , B66F3/24 , B66F3/25 , B66F3/36 , B66F3/46 , F15B11/20 , F15B15/24 , F15B2211/3138 , F15B2211/31505 , F15B2211/31523 , F15B2211/327 , F15B2211/365 , F15B2211/50518 , F15B2211/5157 , F15B2211/526 , F15B2211/55 , F15B2211/665 , F15B2211/6653 , F15B2211/7052 , F15B2211/7107 , F15B2211/761
摘要： An assembly for machine leveling including a plurality of hydraulic cylinders having upper ends adapted for supporting the machine's base, a lower end, a shaft, and a port opening the cylinder; branch conduits having cylinder ends and pump ends, each branch conduit connecting to one of the ports; first shutoff valves connected to the branch conduits for alternatively permitting and resisting fluid flow within the branch conduits; a manifold conduit connected to the branch conduits; a hydraulic pump connected to the manifold conduit and adapted for raising hydraulic pressure within the manifold conduit to a shaft extending pressure; and an electrically modulated variable pressure relief valve connected to the manifold conduit and adapted for raising and lowering the hydraulic pressure.
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