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公开(公告)号：US11761466B2
公开(公告)日：2023-09-19
申请号：US17293858
申请日：2019-11-13
发明人： Timothy Opperwall , Ben Holter , Austin Sowinski , Mike Fossell
CPC分类号： F15B21/08 , F15B19/002 , F15B19/007 , F15B2211/30525 , F15B2211/327 , F15B2211/351 , F15B2211/6336 , F15B2211/6346 , F15B2211/6654
摘要： Systems and methods for control of multi-function hydraulic commands of a multi-function electrohydraulic system are provided. In one aspect, a system for hydraulic control includes a first function in fluid communication with a first electrohydraulic control valve and a second function in fluid communication with a second electrohydraulic control valve. The system includes a controller in communication with the first electrohydraulic control valve and the second electrohydraulic control valve. The controller can be configured to receive an input target command, determine an achievable function rate based on the input target command, where the achievable function rate maintains a proportional relationship between the input target command and the achievable function rate. The controller can also map the achievable function rate to an output command based on a predetermined relationship between the achievable function rates and the output commands and supply the output command to the first and second electrohydraulic valves.
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公开(公告)号：US11725677B2
公开(公告)日：2023-08-15
申请号：US17049073
申请日：2019-05-03
IPC分类号： F15B19/00 , F16K31/124 , F16K37/00
CPC分类号： F15B19/002 , F16K31/1245 , F16K37/0041 , F15B2211/6336
摘要： A valve controller for a valve that comprises an actuator mechanically coupled to at least one flow controlling element. The valve controller comprises at least one pilot valve for controlling the position of the flow controlling element(s) by the actuator. The valve controller comprises a position sensor for obtaining a position signal indicative of the position of one of said at least one flow controlling element. The valve controller is configured to execute a configuration phase comprising establishing a pilot valve integer corresponding to number of pilot valves, and determining a tolerance criterion for the position signal based on the pilot valve integer. A valve arrangement comprising the valve controller and a valve. A method of controlling a valve comprising the configuration phase.
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公开(公告)号：US20180327997A1
公开(公告)日：2018-11-15
申请号：US15500272
申请日：2016-06-24
申请人： KOMATSU LTD.
发明人： Yuto FUJII , Takashi YOKOO
CPC分类号： E02F3/435 , E02F3/425 , E02F3/43 , E02F9/26 , E02F9/265 , F15B15/24 , F15B15/2861 , F15B19/002 , F15B2211/20546 , F15B2211/41536 , F15B2211/6336 , F15B2211/6346 , F15B2211/6651 , F15B2211/6652 , F15B2211/6654
摘要： A work implement has a boom, an arm, and a bucket pivotable around a bucket axis which is a pivot axis with respect to the arm and a tilt axis orthogonal to the bucket axis. The hydraulic cylinder has the bucket pivot around the tilt axis. The regulation valve regulates an amount of supply of a hydraulic oil to be supplied to the hydraulic cylinder based on a command signal. The position sensor measures a stroke length of the hydraulic cylinder. The control unit resets the stroke length measured by the position sensor. The control unit determines proximity to a stroke end of the hydraulic cylinder, generates a command signal for increasing a degree of opening of the regulation valve in the proximity of the stroke end, and resets the stroke length measured by the position sensor while the regulation valve is open in response to the command signal.
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公开(公告)号：US20180307254A1
公开(公告)日：2018-10-25
申请号：US15763336
申请日：2016-09-07
CPC分类号： G05D7/0635 , F15B19/002 , F15B2211/6654 , G05B13/04
摘要： A method (400) for controlling a proportional valve. The method includes the steps of: (i) providing (410) a proportional flow valve system that includes: a closed loop flow controller (110) including a proportional flow control valve (140), a flow sensor (150), and an adjustable gain (180); and an adaptive controller (120) including a model (160) of the closed loop flow controller, and a gain control (170); (ii) actuating (420) the proportional flow control valve; (iii) measuring (430) actual gas flow; (iv) determining (440) a difference between the measured gas flow rate and a desired gas flow rate; (v) adjusting (450) the proportional flow valve using the determined difference; (vi) initiating (460) a response from the model of the closed loop flow controller; (vii) determining (470) a gain for the closed loop flow controller; and (viii) adjusting (480) the adjustable gain of the closed loop flow controller.
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公开(公告)号：US20180172032A1
公开(公告)日：2018-06-21
申请号：US15579034
申请日：2015-06-15
申请人： FESTO AG & Co. KG
IPC分类号： F15B15/06 , F15B15/28 , F15B15/14 , F16K31/163 , F16K37/00
CPC分类号： F15B15/065 , F15B15/14 , F15B15/2807 , F15B15/2861 , F15B19/002 , F15B2211/85 , F15B2211/8752 , F16K31/1635 , F16K37/0033
摘要： The invention relates to a fluid-actuated rotary actuator comprising a housing having a tubular body extending in an axial direction, in which is provided a drive piston assembly for driving a rotatably mounted output shaft, which extends perpendicular to the axial direction through the tubular body and the axial end of which is routed out of the tubular body at an upper wall section of the tubular body, further comprising a magnet assembly associated with the axial end of the output shaft and receiving a rotary movement of the output shaft, and further comprising a position feedback device configured to detect the magnetic field generated by the magnet assembly and to provide, in accordance with the detected magnetic field, a position signal corresponding to a position of the output shaft, wherein the position feedback device is located in a receptacle chamber formed in the upper wall section of the tubular body.
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公开(公告)号：US20180073526A1
公开(公告)日：2018-03-15
申请号：US15647581
申请日：2017-07-12
发明人： Piotr SAWICKI , Marcin CIS
IPC分类号： F15B13/043 , F15B13/042 , F16K31/36
CPC分类号： F15B13/0438 , F15B9/07 , F15B13/00 , F15B13/042 , F15B13/0436 , F15B19/002 , F16K31/36
摘要： A system is described for positioning and locking in place a nozzle within a cylindrical bore of a body, and a method for positioning and locking in place a nozzle within a cylindrical bore of a body is also described. The system has a nozzle having a tubular shape extending between a first end and a second end with an outer cylindrical surface and an inner surface, said inner surface comprising a thread. The system also has a locking member provided within said nozzle and comprising an outer circumferential surface having a thread that corresponds to the thread of the inner surface of the nozzle. The system also has means for providing torque to said locking member to screw said locking member into and within said nozzle via said threaded surfaces to thereby create a press-fit between said outer cylindrical surface and an inner surface of said cylindrical bore.
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公开(公告)号：US20170364097A1
公开(公告)日：2017-12-21
申请号：US15625977
申请日：2017-06-16
申请人： Moog Inc
发明人： Gregory B. Weber
CPC分类号： G05D7/0623 , F15B13/043 , F15B13/0438 , F15B13/086 , F15B19/002 , F15B19/005 , F15B21/087 , F15B2013/0409 , F15B2211/615 , F15B2211/6306 , F15B2211/6309 , F15B2211/6316 , F15B2211/634 , F15B2211/6343 , F15B2211/6654 , F15B2211/6656 , F15B2211/8609 , F16K11/07 , F16K31/002 , F16K31/02 , F16K37/0041 , F16K37/005 , G05D3/12 , G05D7/005
摘要： A servovalve system comprising a pilot stage valve in communication with an hydraulic stage valve, the hydraulic stage valve comprising a valve member movably mounted in a valve chamber to selectively meter fluid flow in a flow path from an upstream inlet port to a downstream outlet port and at least two variable-sized orifices disposed in the flow path between the inlet and outlet ports, an upstream pressure sensor, a downstream pressure sensor, a fluid temperature sensor, a position sensor sensing a linear position of the valve member, a controller that receives input from the upstream pressure sensor, the downstream pressure sensor, the fluid temperature sensor and the position sensor; and the controller configured to provide a control signal to the pilot stage valve as a function of the input from the upstream pressure sensor, the downstream pressure sensor, the fluid temperature sensor and the position sensor.
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公开(公告)号：US20170262001A1
公开(公告)日：2017-09-14
申请号：US15453729
申请日：2017-03-08
发明人： Joseph L Pfaff
CPC分类号： G05D16/2026 , F15B19/002 , F15B2211/20546 , F15B2211/3111 , F15B2211/327 , F15B2211/45 , F15B2211/6309 , F16K37/005 , G01F25/00
摘要： Systems and methods for calibration of an electrohydraulic control valve are provided. In one aspect, a method for calibrating an electrohydraulic control valve includes providing fluid communication between the pump and the reservoir through a bypass calibration orifice. The bypass calibration orifice defines a known restriction. The method further includes measuring a pressure drop across the bypass calibration orifice, commanding the electrohydraulic control valve, calculating a pressure drop across the electrohydraulic control valve, recording the command applied to the electrohydraulic control valve corresponding with the calculated pressure drop across the electrohydraulic control valve, and calibrating the electrohydraulic control valve based on at least two of the recorded command, the known restriction, the measured pressure drop across the bypass calibration orifice, and the calculated pressure drop across the electrohydraulic control valve.
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公开(公告)号：US20160186414A1
公开(公告)日：2016-06-30
申请号：US14976749
申请日：2015-12-21
申请人： Eaton Corporation
发明人： QingHui Yuan , Michael Berne Rannow , Wade Leo Gehlhoff , Christopher William Schottler , Vishal Mahulkar
CPC分类号： E02F9/268 , E02F9/226 , E02F9/2278 , E02F9/2296 , E02F9/267 , F15B19/002 , F15B19/005 , G05B23/0275 , G05B23/0286 , G05B23/0289
摘要： The present disclosure relates to fault detection, isolation and reconfiguration schemes, architectures and methods for use in electrohydraulic actuation systems for construction equipment. In one embodiment, a supervisory controller adapted to interface with a main controller of the construction vehicle is provided. A plurality of control nodes that interface with the supervisory controller are also disclosed, each of which includes pressure and position sensors. The nodes also include a first actuator control node for controlling operation of a first hydraulic actuator, a second actuator control node for controlling operation of a second hydraulic actuator, and a pump control node. The control system has an architecture in which faults are detected and isolated at the supervisory controller level and, where possible, within each of the control nodes at a sensor level, a component level, and a subsystem level.
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公开(公告)号：US09329097B2
公开(公告)日：2016-05-03
申请号：US14221861
申请日：2014-03-21
申请人： FLEXTRONICS AP, LLC
发明人： Hamid Najmolhoda , David Seid
CPC分类号： F15B19/002 , F15B21/045 , F16D48/06 , F16D48/066 , F16D2500/3024 , F16D2500/3168 , F16D2500/70294 , F16D2500/70406 , F16D2500/70418 , F16K31/0675 , F16K37/0083 , G01L19/04 , G05D16/2013
摘要： A method is disclosed for determining off-temperature behavior of a solenoid fluid control valve. The method comprises performing a current sweep at a first temperature. The method further comprises choosing a first and second characterization control pressure for characterizing the solenoid fluid control valve. A first current may be determined that corresponds to the first characterization control pressure based on the current sweep, and a first metric may be assigned to the solenoid fluid control valve based on the first current. A second current corresponding to the second characterization control pressure may be determined based on the current sweep, and a second metric may be assigned to the solenoid fluid control valve based on the second current. Information regarding the behavior of the solenoid fluid control valve at a second temperature may be determined based on the first and second metrics.
摘要翻译： 公开了一种用于确定电磁流体控制阀的非温度特性的方法。 该方法包括在第一温度下执行电流扫描。 该方法还包括选择用于表征电磁流体控制阀的第一和第二表征控制压力。 可以基于电流扫描确定对应于第一表征控制压力的第一电流，并且可以基于第一电流将第一度量分配给电磁流体控制阀。 可以基于电流扫描来确定与第二表征控制压力相对应的第二电流，并且可以基于第二电流将第二度量分配给电磁流体控制阀。 关于电磁流体控制阀在第二温度下的行为的信息可以基于第一和第二度量来确定。
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