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：US20210317638A1

公开(公告)日：2021-10-14

申请号：US17226303

申请日：2021-04-09

Applicant: Danfoss Power Solutions Inc.

Inventor： Erik Westergaard ,  Henrik Hauge

IPC: E02F9/22 ,  E02F9/20

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).