公开(公告)号：US20200003239A1

公开(公告)日：2020-01-02

申请号：US16442696

申请日：2019-06-17

Applicant: Eaton Intelligent Power Limited

Inventor： Meng Wang ,  Michael Berne Rannow

IPC: F15B21/00 ,  B66C13/06 ,  F15B11/00 ,  F15B11/044 ,  E04G21/04 ,  F15B19/00 ,  F15B11/042 ,  F16K31/42

Abstract: A hydraulic system (600) and method for reducing boom dynamics of a boom (30), while providing counter-balance valve protection, includes a hydraulic actuator (110), first and second counter-balance valves (300, 400), first and second independent control valves (700, 800), and first and second blocking valves (350, 450). The actuator includes first and second corresponding chambers. In a first mode, the second counter-balance valve is opened by the first control valve, and the first counter-balance valve is opened by the second control valve. In a second mode, at least one of the counter-balance valves is closed. A meter-out control valve (800, 700) may be operated in a flow control mode, and/or a meter-in control valve (700, 800) may be operated in a pressure control mode. Boom dynamics reduction may occur while the boom is in motion (e.g., about a worksite). By opening the counter-balance valves, sensors at the control valves may be used to characterize external loads. The control valves may respond to the external loads and at least partially cancel unwanted boom dynamics. The system may further detecting faults in actuators with counter-balance valves and prevent any single point fault from causing a boom falling event and/or mitigate such faults.

公开(公告)号：US20210341001A1

公开(公告)日：2021-11-04

申请号：US17303465

申请日：2021-05-28

Applicant: Eaton Intelligent Power Limited

Inventor： Meng (Rachel) Wang ,  Michael Berne Rannow

IPC: F15B21/00 ,  B66C13/06 ,  E02F9/22 ,  F15B11/00 ,  E04G21/04 ,  F15B11/044 ,  F16F15/023 ,  F16F15/027

Abstract: A hydraulic system (600) and method for reducing boom dynamics of a boom (30), while providing counter-balance valve protection, includes a hydraulic actuator (110), first and second counter-balance valves (300, 400), first and second control valves (700, 800), and first and second blocking valves (350, 450). A net load (90) is supported by a first chamber (116, 118) of the hydraulic actuator, and a second chamber (118, 116) of the hydraulic actuator may receive fluctuating hydraulic fluid flow from the second control valve to produce a vibratory response (950) that counters environmental vibrations (960) on the boom. The first blocking valve prevents the fluctuating hydraulic fluid flow from opening the first counter-balance valve. The first blocking valve may drain leakage from the first counter-balance valve.

公开(公告)号：US11002297B2

公开(公告)日：2021-05-11

申请号：US16834450

申请日：2020-03-30

Applicant: Eaton Intelligent Power Limited

Inventor： Meng Wang ,  Michael Berne Rannow

IPC: F15B19/00 ,  F15B11/00 ,  F15B13/04 ,  F15B13/044 ,  F15B21/02 ,  F15B21/08 ,  F15B11/08 ,  F16K37/00 ,  G01F1/36 ,  G01F15/00

Abstract: Systems and methods for auto-commissioning first and second valve assemblies associated with an actuator in an electro-hydraulic system are disclosed. In one method, a controller performs an automatic test protocol to determine a bulk modulus over fluid volume parameter used by the controller to control the valve assemblies. In one aspect, the test protocol can include pressurizing each side of the actuator to two different pressures with one of the first and second valve assemblies and blocking the other side of the actuator with the other of the first and second valve assemblies. The bulk modulus over fluid volume parameter for each valve assembly can be calculated based on recorded fluid pressures at the actuator and consumed flow at the first and second valve assemblies.

公开(公告)号：US10408238B2

公开(公告)日：2019-09-10

申请号：US15808373

申请日：2017-11-09

Applicant: Eaton Intelligent Power Limited

Inventor： Meng Wang ,  Michael Berne Rannow

IPC: F16D31/02 ,  F15B13/04 ,  F15B13/044 ,  F15B11/00 ,  F15B21/02 ,  F15B21/08 ,  F16K37/00 ,  F15B11/08 ,  G01F1/36 ,  G01F15/00

Abstract: Systems and methods for controlling valve assemblies associated with an actuator in an electro-hydraulic system are disclosed. In one method, a controller monitors hydraulic fluid flow for an actuator to identify one valve assembly connected to the actuator as a meter-in valve and another valve assembly connected to the actuator as a meter-out valve. In one aspect, the valve assembly most recently identified as the meter-in valve is controlled to maintain a pressure setpoint and the valve assembly most recently identified as the meter-out valve is controlled to maintain a hydraulic fluid flow rate. The method can also include determining whether the actuator is in a passive state or an overrunning state and controlling the valve most recently identified as the meter-in valve to maintain a first pressure setpoint when the actuator is in a passive state and to maintain a second pressure setpoint when the actuator is in an overrunning state.

公开(公告)号：US10323663B2

公开(公告)日：2019-06-18

申请号：US15326395

申请日：2015-07-15

Applicant: Eaton Intelligent Power Limited

Inventor： Meng Wang ,  Michael Berne Rannow

IPC: F15B15/24 ,  F15B21/00 ,  B66C13/06 ,  F15B11/00 ,  F15B11/044 ,  E04G21/04 ,  F15B11/042 ,  F16K31/42 ,  F15B19/00

Abstract: A hydraulic system (600) and method for reducing boom dynamics of a boom (30), while providing counter-balance valve protection, includes a hydraulic actuator (110), first and second counter-balance valves (300, 400), first and second independent control valves (700, 800), and first and second blocking valves (350, 450). The actuator includes first and second corresponding chambers. In a first mode, the second counter-balance valve is opened by the first control valve, and the first counter-balance valve is opened by the second control valve. In a second mode, at least one of the counter-balance valves is closed. A meter-out control valve (800, 700) may be operated in a flow control mode, and/or a meter-in control valve (700, 800) may be operated in a pressure control mode. Boom dynamics reduction may occur while the boom is in motion (e.g., about a worksite). By opening the counter-balance valves, sensors at the control valves may be used to characterize external loads. The control valves may respond to the external loads and at least partially cancel unwanted boom dynamics. The system may further detecting faults in actuators with counter-balance valves and prevent any single point fault from causing a boom falling event and/or mitigate such faults.

公开(公告)号：US10316929B2

公开(公告)日：2019-06-11

申请号：US15036749

申请日：2014-11-07

Applicant: Eaton Intelligent Power Limited

Inventor： Meng (Rachel) Wang ,  Michael Berne Rannow

IPC: B66C13/06 ,  E02F9/22 ,  F16F15/027 ,  F16F15/023 ,  E04G21/04 ,  F15B21/00

Abstract: A hydraulic system (600) and method for reducing boom dynamics of a boom (30), while providing counter-balance valve protection, includes a hydraulic cylinder (110), first and second counter-balance valves (300, 400), first and second control valves (700, 800), and first and second blocking valves (350, 450). A net load (90) is supported by a first chamber (116, 118) of the hydraulic cylinder, and a second chamber (118, 116) of the hydraulic cylinder may receive fluctuating hydraulic fluid flow from the second control valve to produce a vibratory response (950) that counters environmental vibrations (960) on the boom. The method may include measuring first pressure ripples at the second chamber and reducing a magnitude of second pressure ripples at the first chamber. The pressure ripples may be transformed into a flow command by multiplying the pressure ripples by a gain and/or phase shifting. The gain and/or the phase shifting may be adjusted by feedback. The feedback may include the second pressure ripples at the load holding chamber, a position of the hydraulic actuator, and/or an operator input. A reference signal may be filtered with a moving average filter.

公开(公告)号：US20190024677A1

公开(公告)日：2019-01-24

申请号：US16038506

申请日：2018-07-18

Applicant: Eaton Intelligent Power Limited

Inventor： Michael Berne Rannow

IPC: F15B11/16 ,  F15B13/02 ,  F15C1/00 ,  F15C3/02

Abstract: The present disclosure relates to a load dependent flow control system for directing hydraulic fluid to a hydraulic actuator. The load dependent flow control system includes a closed-center valve device for controlling hydraulic fluid flow to the actuator. The closed-center valve device includes a valve spool and an electro-actuator that adjusts a position of the valve spool to adjust a rate of the hydraulic fluid flow supplied to the hydraulic actuator. A pressure sensor is provided for sensing a pressure of the hydraulic fluid provided to the hydraulic actuator. The system also includes an electronic controller configured to receive an operator flow command from an operator interface. The operator flow command corresponds to a base flow through the closed-center valve device. The electronic controller interfaces with the electro-actuator of the closed-center valve device and with the pressure sensor. At least when the sensed pressure is above a threshold pressure, the electronic controller uses the operator flow command and the sensed pressure to generate a pressure-modified flow command that is sent to the closed-center valve device to control flow through the closed-center valve device. The pressure-modified flow command corresponds to a pressure-modified flow through the closed-center valve device. The pressure-modified flow is less than the base flow through the closed-center valve device.

公开(公告)号：US10139216B2

公开(公告)日：2018-11-27

申请号：US15195450

申请日：2016-06-28

Applicant: Eaton Intelligent Power Limited

Inventor： Michael Berne Rannow ,  Stephen D. Smith ,  Jason T. Kraft

IPC: G01L27/00 ,  G01B7/14 ,  F15B19/00 ,  E02F3/34 ,  E02F9/22 ,  E02F9/26 ,  F15B1/027 ,  F15B1/26 ,  F15B11/16

Abstract: An online method for reconfiguring pressure and position sensors in a hydraulic system is disclosed. In one step, a sensor drift condition, a recalibration request, or an unisolated fault condition is detected. In another step, a system pressure sensor or another sensor, such as a load-sense pressure sensor, is verified as a trusted master reference sensor. Another step includes measuring and recording a first pressure reading at the master reference sensor and first voltage readings associated with first, second, third, and fourth pressure slave sensors at a first pump pressure set point. Another step includes, repeating the previous step at a second pump pressure set point. A new gain and offset for each of the first, second, third, and fourth pressure sensors can be calculated based on a comparison of the recoded first and second pressure readings and the recorded first and second voltage readings.