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    Anti-stall system for open circuit systems
    61.
    发明授权
    Anti-stall system for open circuit systems 有权

    公开(公告)号：US12065807B2

    公开(公告)日：2024-08-20

    申请号：US17368979

    申请日：2021-07-07

    Applicant: Danfoss Power Solutions Inc.

    Inventor： Caleb Van De Stroet ,  Austin Hansell

    IPC: E02F9/22 ,  F02B63/06 ,  F02D29/04 ,  F15B20/00 ,  E02F9/20

    CPC classification number: E02F9/2246 ,  F02B63/06 ,  F02D29/04 ,  F15B20/00 ,  E02F9/2066 ,  F02D2200/101 ,  F15B2211/20523

    Abstract: An anti-stall system to prevent an engine, particularly a low-powered engine, from stalling when encountering a load that the machine is capable of overcoming but due to the nature of the engine, the load encounter would result in a stall. The system includes a hydraulic system in communication with a control system that has one or more sensors that detect, determine, and/or transmit an operational variable. The control system further comprises a plurality of anti-stall blocks having unique configurations, including a first configured to limit output flow upon determination of an engine droop, a second configured to limit output flow based on available engine torque, a third configured to limit output pressure upon rapid engine droop detection, and a fourth configured to prioritize and share output flow between the machine functions. The anti-stall blocks provide for complementary and cooperative configuration to prevent a stall from occurring based on responses to the detection and determination of various dynamic and continuous operational variables in real-time or near real-time with operational parameters.

    Method and system for remote machine control
    62.
    发明授权
    Method and system for remote machine control 有权

    公开(公告)号：US12055931B2

    公开(公告)日：2024-08-06

    申请号：US17298079

    申请日：2018-11-30

    Applicant: Danfoss Power Solutions, Inc.

    Inventor： Mark D. Byrnes ,  Rodney L Dockter ,  Chris Woodard

    IPC: G05D1/00 ,  G05B19/042 ,  G05B19/045

    CPC classification number: G05D1/0038 ,  G05B19/0426 ,  G05B19/045 ,  G05D1/0022

    Abstract: A system and method for secure remote control of a machine includes transmitting video data from a camera on the machine to an operator controller located at a remote operation station, and receiving, at a machine controller of the machine, an operator control message from the operator controller. The operator control message is based on an input device actuated in response to the video data. The method further includes confirming validity of the operator control message based, at least in part, on the video data transmitted from the camera to the operator controller, and controlling the machine with the operator control message when validity of the operator control message is confirmed.

    HYDRAULIC CIRCUIT ARRANGEMENT AND CONTROL SYSTEM FOR GANGED ELECTRONICALLY-COMMUTATED PUMPS
    63.
    发明公开
    HYDRAULIC CIRCUIT ARRANGEMENT AND CONTROL SYSTEM FOR GANGED ELECTRONICALLY-COMMUTATED PUMPS 审中-公开

    公开(公告)号：US20240200551A1

    公开(公告)日：2024-06-20

    申请号：US18555748

    申请日：2022-04-20

    Applicant: Danfoss Power Solutions Inc.

    Inventor： Connor SZCZEPANIAK ,  Jeremie LAGARDE

    IPC: F04B49/06 ,  F04B1/06 ,  F04B11/00 ,  F04B23/06

    CPC classification number: F04B49/06 ,  F04B1/06 ,  F04B11/005 ,  F04B23/06

    Abstract: A hydraulic circuit arrangement includes a plurality of electronically-commutated pumps providing flow to a common hydraulic line, the plurality of electronically-commutated pumps including one or more quantized electronically-commutated pumps and one or more unquantized electronically-commutated pumps. A controller includes a pressure controller and a flow divider. The pressure controller is configured to receive a pressure signal corresponding to the pressure within the common hydraulic line, to compare the pressure signal to a demanded pressure, and to determine a target flow value required to produce the demanded pressure. The flow divider is configured to receive the target flow value and allocate the target flow value into a quantized target flow value for allocation among the one or more quantized electronically-commutated pumps and an unquantized target flow value for allocation among the one or more unquantized electronically-commutated pumps.

    CONTROL SYSTEM FOR ACTUATING LIFTING FUNCTION
    65.
    发明公开
    CONTROL SYSTEM FOR ACTUATING LIFTING FUNCTION 审中-公开

    公开(公告)号：US20230175531A1

    公开(公告)日：2023-06-08

    申请号：US17999809

    申请日：2021-05-27

    Applicant: Danfoss Power Solutions Inc.

    Inventor： Aaron Darnell ,  Zhekang Du ,  Simon Nielsen

    IPC: F15B15/20

    CPC classification number: F15B15/20

    Abstract: A hydraulic control system for linear actuation that provides a bypass flow during startup of a lifting command, provides a split flow between a cylinder and a reservoir once a minimum operating speed of a pump has been reached, and provides complete flow to a cylinder after the minimum operating speed of the pump has been reached. This is achieved through control of a flow control valve and a proportional flow control valve by a processor.

    HYDRAULIC AXIAL PISTON UNIT AND METHOD FOR CONTROLLING OF A HYDRAULIC AXIAL PISTON UNIT
    68.
    发明申请
    HYDRAULIC AXIAL PISTON UNIT AND METHOD FOR CONTROLLING OF A HYDRAULIC AXIAL PISTON UNIT 有权

    公开(公告)号：US20210164501A1

    公开(公告)日：2021-06-03

    申请号：US16700407

    申请日：2019-12-02

    Applicant: Danfoss Power Solutions Inc.

    Inventor： Jaromir Tvaruzek ,  Samuel Hall ,  Phil Evans ,  Dennis Greene

    IPC: F15B21/00

    Abstract: Hydraulic axial piston unit having a rotational group for driving or being driven by a driving shaft, and a tiltable displacement element for adjusting the displacement volume of the rotational group. The rotational group includes a rotatable cylinder block in which working pistons are mounted reciprocally moveable in cylinder bores for conveying hydraulic fluid from a kidney-shaped inlet port to a kidney-shaped outlet port on a valve segment. At least two control ports are located on the valve segment each between the respective circumferential ends of the kidney-shaped inlet port and the outlet port. The control ports can be brought sequentially in fluid connection with the cylinder bores when the cylinder block is rotating. At least one hydraulic fluid injector is connected fluidly to one control port, for sequentially injecting pressurized hydraulic fluid via the control port into the passing cylinder bores. Via the other control port hydraulic fluid can be drained from passing cylinder bores.

    ELECTRIC DISPLACEMENT CONTROL FOR AN OPEN CIRCUIT VARIABLE DISPLACEMENT PUMP
    69.
    发明申请
    ELECTRIC DISPLACEMENT CONTROL FOR AN OPEN CIRCUIT VARIABLE DISPLACEMENT PUMP 有权

    公开(公告)号：US20210040944A1

    公开(公告)日：2021-02-11

    申请号：US16866714

    申请日：2020-05-05

    Applicant: DANFOSS POWER SOLUTIONS INC.

    Inventor： Stanislav Smolka

    IPC: F04B49/00 ,  F04B17/00 ,  F04B49/22

    Abstract: An electric displacement control system has a hydraulic variable displacement pump that operates in an open hydraulic circuit. A servo piston is disposed within a servo bore that is connected to the hydraulic variable displacement pump. Located in the servo bore is a control spool valve having an orifice that vents fluid pressure from the servo bore to a pump case. The flow rate of the system depends upon a fluid force between a feedback spring on a first side of the control spool valve and a solenoid actuator force on a second side of the control spool valve.

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