Abstract: Idling a hydraulic machine includes electronically controlled high and low-pressure valves, a control system arranged to control opening and closing of said valves, a first idle safety valve arrangement arranged between the first working chamber and a fluid sink with a pressure equal to or lower than the high pressure, operating the hydraulic machine in an empty cylinder idle mode, wherein the high and low-pressure valves are concurrently closed for at least a whole cycle of the varying volume, and releasing hydraulic fluid to the fluid sink only when fluid pressure in the working chamber increases above a set threshold and the empty cylinder mode is enabled, enabling the first idle safety valve arrangement when the hydraulic machine operates in the empty cylinder idle mode, and disabling when not.
Type:
Grant
Filed:
December 20, 2019
Date of Patent:
April 2, 2024
Assignee:
DIINEF AS
Inventors:
Per Nielsen Lindholdt, Geir-Kjetil Nerland, Henrik Bollerup Larsen
Abstract: Idling a hydraulic machine includes electronically controlled high and low-pressure valves, a control system arranged to control opening and closing of said valves, a first idle safety valve arrangement arranged between the first working chamber and a fluid sink with a pressure equal to or lower than the high pressure, operating the hydraulic machine in an empty cylinder idle mode, wherein the high and low-pressure valves are concurrently closed for at least a whole cycle of the varying volume, and releasing hydraulic fluid to the fluid sink only when fluid pressure in the working chamber increases above a set threshold and the empty cylinder mode is enabled, enabling the first idle safety valve arrangement when the hydraulic machine operates in the empty cylinder idle mode, and disabling when not.
Type:
Application
Filed:
December 20, 2019
Publication date:
December 9, 2021
Applicant:
DIINEF AS
Inventors:
Per Nielsen LINDHOLDT, Geir-Kjetil NERLAND, Henrik Bollerup LARSEN
Abstract: A method for controlling torque equilibrium of a hydraulic motor, the method includes: setting a torque equilibrium reference position in a control system, setting a reference direction in the control system, determining one or more high-pressure torque producing cylinders towards the torque equilibrium reference position in a reference direction in the control system, and opening a high-pressure valve on each of one or more high-pressure torque producing cylinders to produce a torque towards the torque equilibrium reference position in the reference direction on the drive shaft of the motor.
Type:
Grant
Filed:
November 2, 2017
Date of Patent:
October 13, 2020
Assignee:
DIINEF AS
Inventors:
Per Nielsen Lindholdt, Geir-Kjetil Nerland, Henrik Bollerup Larsen