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    METHOD TO AUTOMATICALLY DETECT PARAMETER FOR PRESSURE DYNAMICS CONTROL
    1.
    发明申请
    METHOD TO AUTOMATICALLY DETECT PARAMETER FOR PRESSURE DYNAMICS CONTROL 审中-公开

    公开(公告)号：US20200291970A1

    公开(公告)日：2020-09-17

    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

    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.

    Load-dependent hydraulic fluid flow control system
    3.
    发明授权
    Load-dependent hydraulic fluid flow control system 有权

    公开(公告)号：US11105347B2

    公开(公告)日：2021-08-31

    申请号：US16038506

    申请日：2018-07-18

    Applicant: Eaton Intelligent Power Limited

    Inventor： Michael Berne Rannow

    IPC: F15B11/16 ,  F15B13/02 ,  F15B21/08 ,  E02F9/22 ,  E02F9/20

    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.

    SYSTEM AND METHODS FOR CONTROLLED LOWERING AND LIFTING OF A LOAD
    4.
    发明申请
    SYSTEM AND METHODS FOR CONTROLLED LOWERING AND LIFTING OF A LOAD 审中-公开

    公开(公告)号：US20200224387A1

    公开(公告)日：2020-07-16

    申请号：US16740682

    申请日：2020-01-13

    Applicant: Eaton Intelligent Power Limited

    Inventor： Michael Berne Rannow ,  Vishal Vijay Mahulkar

    IPC: E02F9/22

    Abstract: A system and method for the controlled lowering and lifting of a load are disclosed. The system and method may include operating a work machine having a hydraulic system including a hydraulic actuator for supporting a load, a first control valve in fluid communication with the actuator, and a controller for operating the first control valve. In one embodiment, the controller includes a first algorithm for operating the first control valve in a load lowering operation. When an operational fault within the hydraulic system is detected, the controller can be configured to enter into a safe lowering mode. In the safe lowering mode, the first algorithm is disabled and a pulse width modulation (PWM) current is sent from the controller to the first control valve. A user interface is provided to allow an operator to control the PWM current duty ratio to allow the load supported by the actuator to be lowered.

    System and methods for controlled lowering and lifting of a load
    5.
    发明授权
    System and methods for controlled lowering and lifting of a load 有权

    公开(公告)号：US10533304B2

    公开(公告)日：2020-01-14

    申请号：US14106112

    申请日：2013-12-13

    Applicant: Eaton Intelligent Power Limited

    Inventor： Michael Berne Rannow ,  Vishal Vijay Mahulkar

    IPC: E02F9/24 ,  F15B11/15 ,  F15B20/00 ,  E02F9/22

    Abstract: A system and method for the controlled lowering and lifting of a load are disclosed. The system and method may include operating a work machine having a hydraulic system including a hydraulic actuator for supporting a load, a first control valve in fluid communication with the actuator, and a controller for operating the first control valve. In one embodiment, the controller includes a first algorithm for operating the first control valve in a load lowering operation. When an operational fault within the hydraulic system is detected, the controller can be configured to enter into a safe lowering mode. In the safe lowering mode, the first algorithm is disabled and a pulse width modulation (PWM) current is sent from the controller to the first control valve. A user interface is provided to allow an operator to control the PWM current duty ratio to allow the load supported by the actuator to be lowered.

    Methods and apparatus to enable boom bounce reduction and prevent un-commanded motion in hydraulic systems
    6.
    发明授权
    Methods and apparatus to enable boom bounce reduction and prevent un-commanded motion in hydraulic systems 有权

    公开(公告)号：US11209027B2

    公开(公告)日：2021-12-28

    申请号：US16442696

    申请日：2019-06-17

    Applicant: Eaton Intelligent Power Limited

    Inventor： Meng Wang ,  Michael Berne Rannow

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

    Pilot control mechanism for boom bounce reduction
    7.
    发明授权
    Pilot control mechanism for boom bounce reduction 有权

    公开(公告)号：US11047406B2

    公开(公告)日：2021-06-29

    申请号：US16502273

    申请日：2019-07-03

    Applicant: Eaton Intelligent Power Limited

    Inventor： Meng (Rachel) Wang ,  Michael Berne Rannow

    IPC: F15B21/00 ,  E02F9/22 ,  F15B11/00 ,  B66C13/06 ,  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.

    Pilot control mechanism for boom bounce reduction
    8.
    发明授权
    Pilot control mechanism for boom bounce reduction 有权

    公开(公告)号：US10344783B2

    公开(公告)日：2019-07-09

    申请号：US15036756

    申请日：2014-11-07

    Applicant: Eaton Intelligent Power Limited

    Inventor： Meng (Rachel) Wang ,  Michael Berne Rannow

    IPC: F15B11/00 ,  F15B11/044 ,  F15B21/00 ,  B66C13/06 ,  E02F9/22 ,  E04G21/04 ,  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.

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