公开(公告)号：US11326627B2

公开(公告)日：2022-05-10

申请号：US16938221

申请日：2020-07-24

Applicant: DANFOSS POWER SOLUTIONS II TECHNOLOGY A/S

Inventor： Michael Berne Rannow ,  Meng Wang

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

Abstract: A hydraulic system (600) and method for reducing boom dynamics of a boom (30), while providing counter-balance valve protection, includes a hydraulic cylinder (110), first and second counter-balance valves (300, 400), and first and second control valves (700, 800). A net load (90) is supported by a first chamber (116, 118) of the hydraulic cylinder, and a second chamber (118, 116) of the hydraulic cylinder 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 control valve may apply a holding pressure and thereby hold the first counter-balance valve closed and the second counter-balance valve open.

公开(公告)号：US20230046319A1

公开(公告)日：2023-02-16

申请号：US17818286

申请日：2022-08-08

Applicant: DANFOSS POWER SOLUTIONS II TECHNOLOGY A/S

Inventor： Meng Wang ,  Jalpa Shah ,  Damrongrit Piyabongkarn

IPC: F15B11/17

Abstract: The present disclosure relates to a motion control unit that is capable of receiving electrical power from an electrical power source and hydraulic power from a hydraulic power source. The motion control is configured to produce a blended power output derived from the electrical and hydraulic power which can be used to power a hydraulic actuator. The motion control unit can also split hydraulic power recovered from hydraulic actuator to the electrical power source and the hydraulic power source.

公开(公告)号：US20220307524A1

公开(公告)日：2022-09-29

申请号：US17613190

申请日：2020-05-21

Applicant: Danfoss Power Solutions II Technology A/S

Inventor： Meng Wang ,  Mohd Azrin Mohd Zulkefli

IPC: F15B15/18 ,  F15B21/08

Abstract: The present disclosure relates to a blended or hybrid power system with increased operating efficiency. The blended power system combines the advantages of electrical power with the advantages of hydraulic power when delivering power to a hydraulic actuator. The hydraulic power provides higher power density and the electrical power provides high efficiency and control accuracy in the blended power system. In a blended power system, a control system may be configured to select different modes of operation based on the loads encountered in the combined hydraulic and electrohydrostatic system. The blended power system also allows for smooth and uninterrupted transitions between the different modes of operation within the blended power system. Thus, jerkiness in the blended power system may be minimized or eliminated.

公开(公告)号：US11713778B2

公开(公告)日：2023-08-01

申请号：US17613190

申请日：2020-05-21

Applicant: Danfoss Power Solutions II Technology A/S

Inventor： Meng Wang ,  Mohd Azrin Mohd Zulkefli

IPC: F15B15/18 ,  F15B21/08

CPC classification number: F15B15/18 ,  F15B21/082 ,  F15B2211/20515 ,  F15B2211/20561 ,  F15B2211/20569 ,  F15B2211/27 ,  F15B2211/3057 ,  F15B2211/613 ,  F15B2211/6313 ,  F15B2211/6658

Abstract: The present disclosure relates to a blended or hybrid power system with increased operating efficiency. The blended power system combines the advantages of electrical power with the advantages of hydraulic power when delivering power to a hydraulic actuator. The hydraulic power provides higher power density and the electrical power provides high efficiency and control accuracy in the blended power system. In a blended power system, a control system may be configured to select different modes of operation based on the loads encountered in the combined hydraulic and electrohydrostatic system. The blended power system also allows for smooth and uninterrupted transitions between the different modes of operation within the blended power system. Thus, jerkiness in the blended power system may be minimized or eliminated.

公开(公告)号：US11286642B2

公开(公告)日：2022-03-29

申请号：US16388546

申请日：2019-04-18

Applicant: Danfoss Power Solutions II Technology A/S

Inventor： Per William Danzl ,  Michael Berne Rannow ,  Meng Wang ,  Chad Anthony Larish

IPC: E02F9/22 ,  B60K25/06 ,  B60K25/00 ,  E02F9/20 ,  B60K25/02

Abstract: An energy conserving hydraulic system for a mobile work machine includes a prime mover, a drivetrain, a baseline hydraulic system, a power-take-off, a transformer, a work implement, and an accumulator. The drivetrain may include an automated manual transmission (AMT) that is rotationally coupled to the prime mover and the power-take-off. The baseline hydraulic system is powered by the prime mover and includes a first hydraulic circuit. The transformer is hydraulically coupled to second and third hydraulic circuits. The work implement is actuated by an actuator that is adapted to be simultaneously hydraulically coupled to the first and the second hydraulic circuits. The power-take-off is adapted to exchange shaft power with the transmission. A clutch selectively rotationally couples the transmission and the power-take-off. The accumulator is hydraulically coupled to the second hydraulic circuit. The second hydraulic circuit is hydraulically coupled to a first rotating group of the hydraulic transformer, and a third hydraulic circuit is hydraulically coupled to a second rotating group of the hydraulic transformer.