公开(公告)号：US11939739B2

公开(公告)日：2024-03-26

申请号：US17226303

申请日：2021-04-09

Applicant: Danfoss Power Solutions Inc.

Inventor： Erik Westergaard ,  Henrik Hauge

IPC: E02F3/34 ,  E02F3/43 ,  E02F9/20 ,  E02F9/22

CPC classification number: E02F3/3411 ,  E02F3/432 ,  E02F9/2029 ,  E02F9/2203 ,  E02F9/2228 ,  E02F9/2296

Abstract: The invention relates to a method (19) of operating a hydraulic arrangement (1) including a mounting base (5), a boom (3) that is pivotably arranged on the mounting base (5), and a Z-kinematics (2) that is arranged on the boom (3). The Z-kinematics (2) tilts a tool attachment device (10), that is pivotably arranged on the boom (3). The boom (3) is moved by a lifting hydraulic piston (7) that is connected to the boom (3) and to the mounting base (5). The Z-kinematics (2) is moved by at least a tilting hydraulic piston (11) that is connected to a lever of the Z-kinematics (2) and to the mounting base (5). On application of an input control command for changing the position of the lifting hydraulic piston (7), a compensation command is automatically generated and applied to the tilting hydraulic piston (11), to essentially maintain the attitude of the tool attachment device (10). The compensation command is generated based on the input control command for the lifting hydraulic piston (7), using a mathematical model of the hydraulic arrangement (1).

公开(公告)号：US11644028B2

公开(公告)日：2023-05-09

申请号：US16843166

申请日：2020-04-08

Applicant: Danfoss Power Solutions Inc.

Inventor： Doug Kardell ,  Stanislav Smolka

IPC: F04B49/08 ,  F04B9/04 ,  F04B1/295 ,  F04B49/00 ,  F04B49/12

CPC classification number: F04B49/08 ,  F04B1/295 ,  F04B9/042 ,  F04B49/002 ,  F04B49/12 ,  F04B2203/0207

Abstract: A control arrangement for a variable displacement pump includes a pressure control unit and a separate mechanical control unit, each mounted on a housing of the variable displacement pump. The pressure control unit provides pressure control for the variable displacement pump and the mechanical control unit provides rotary feedback control for the variable displacement pump.

公开(公告)号：US20230140728A1

公开(公告)日：2023-05-04

申请号：US18048703

申请日：2022-10-21

Applicant: Danfoss Power Solutions Inc.

Inventor： Thomas Traeger Hansen ,  Simon Nielsen

IPC: F04B49/06 ,  F04B17/03

Abstract: A system for calibrating an electrohydraulic pump for a vehicle having a propel system that includes an engine connected to the electrohydraulic pump. A micro-controller having software and an input device is connected to a plurality of sensors mounted about the vehicle. The software uses a plurality of parameters to convert internal analog drive signals into analog output signals to control the electrohydraulic pump and motion of the machine where the parameters include a forward start current value and a reverse start current value.

公开(公告)号：US20230136445A1

公开(公告)日：2023-05-04

申请号：US18147029

申请日：2022-12-28

Applicant: Danfoss Power Solutions, Inc.

Inventor： Steven Leege ,  Stephen Frantz ,  Jeffrey C. Hansell

IPC: F03C1/06 ,  F03C1/00 ,  F04B1/122 ,  F04B1/20 ,  F04B1/324 ,  F03C1/08

Abstract: A hydraulic piston unit including a rotational group for driving or being driven by a driving shaft, and having a tiltable displacement element for adjusting the displacement volume of the rotational group between a minimum or a maximum displacement, wherein, on t valve segment between a kidney-shaped inlet port and a kidney-shaped outlet port at respective dead end positions of reciprocally moveable working pistons first and second control ports are located in fluid connection with cylinder bores in the cylinder block, for controlling the position of the displacement element. The hydraulic piston unit further includes a control valve with a shiftable control valve spool fluidly connected via a high pressure port to a high pressure side of the hydraulic piston unit. The control valve spool is configured to conduct hydraulic fluid from the high pressure side to one of the first or the second control port.

公开(公告)号：US11592000B2

公开(公告)日：2023-02-28

申请号：US16050001

申请日：2018-07-31

Applicant: Danfoss Power Solutions, Inc.

Inventor： Steven Leege ,  Stephen Frantz ,  Jeffrey C. Hansell

IPC: F03C1/06 ,  F03C1/00 ,  F03C1/08 ,  F04B1/20 ,  F04B1/32 ,  F04B1/12 ,  F04B1/122 ,  F04B1/324

Abstract: A hydraulic piston unit including a rotational group for driving or being driven by a driving shaft, and having a tiltable displacement element for adjusting the displacement volume of the rotational group between a minimum or a maximum displacement, wherein, on t valve segment between a kidney-shaped inlet port and a kidney-shaped outlet port at respective dead end positions of reciprocally moveable working pistons first and second control ports are located in fluid connection with cylinder bores in the cylinder block, for controlling the position of the displacement element. The hydraulic piston unit further includes a control valve with a shiftable control valve spool fluidly connected via a high pressure port to a high pressure side of the hydraulic piston unit. The control valve spool is configured to conduct hydraulic fluid from the high pressure side to one of the first or the second control port.

公开(公告)号：USD945491S1

公开(公告)日：2022-03-08

申请号：US29716509

申请日：2019-12-10

Applicant: DANFOSS POWER SOLUTIONS INC.

Designer： Charlie Dvorak ,  Wondimagegn Diress ,  Pavol Balco ,  Jeffrey C. Hansell

公开(公告)号：USD944865S1

公开(公告)日：2022-03-01

申请号：US29716511

申请日：2019-12-10

Applicant: DANFOSS POWER SOLUTIONS INC.

Designer： Charlie Dvorak ,  Wondimagegn Diress ,  Pavol Balco ,  Jeffrey C. Hansell

公开(公告)号：US20210317827A1

公开(公告)日：2021-10-14

申请号：US16843166

申请日：2020-04-08

Applicant: Danfoss Power Solutions Inc.

Inventor： Doug Kardell ,  Stanislav Smolka

IPC: F04B49/08 ,  F04B9/04

Abstract: A control arrangement for a variable displacement pump includes a pressure control unit and a separate mechanical control unit, each mounted on a housing of the variable displacement pump. The pressure control unit provides pressure control for the variable displacement pump and the mechanical control unit provides rotary feedback control for the variable displacement pump.

公开(公告)号：US10946869B2

公开(公告)日：2021-03-16

申请号：US16178983

申请日：2018-11-02

Applicant: Danfoss Power Solutions, Inc.

Inventor： Caleb Van De Stroet ,  Zhekang Du

IPC: B60W50/035 ,  B60W10/04 ,  B60W10/184 ,  B60W30/18

Abstract: According to the present disclosure, a system for providing steering control in a dual path machine includes a propulsion controller operatively connected to plants of the machine for driving ground contacting elements, the propulsion controller being configured to control steering of the dual path machine through drive signals sent to the plants, and a brake controller operatively connected to left and right brakes of the machine, the brake controller being configured to control steering of the machine by providing differential brake pressures to the left and right brakes. The system of the present disclosure provides redundant steering control by receiving an input signal at the brake controller with an indication of steering position, receiving an input signal at the brake controller with an indication of brake position, and providing a differential brake pressure to brakes of the dual path machine based on the steering input signal and brake input signal.

公开(公告)号：US10890174B2

公开(公告)日：2021-01-12

申请号：US16217159

申请日：2018-12-12

Applicant: Danfoss Power Solutions Inc.

Inventor： Joshua Cronbaugh

IPC: F04B49/08 ,  F04B49/24 ,  F04B49/035 ,  F04B49/02

Abstract: A hydrostatic system that provides different volumetric efficiency at different states and includes a pump with a discharge and supply line. Connected between the discharge and supply line is a valve. The valve is adapted to move to a position having a cross port orifice when the pump is in a neutral state and a position where the ports are blocked when the pump is in an operation state.