公开(公告)号：WO2023006237A1

公开(公告)日：2023-02-02

申请号：PCT/EP2022/025024

申请日：2022-01-26

Applicant: DANFOSS POWER SOLUTIONS II TECHNOLOGY AS

Inventor： LOWMAN, Roger D. ,  LARISH, Chad Anthony ,  NEWBAUER, Sam

IPC: F15B11/044 ,  F15B21/047 ,  F15B11/0445 ,  F15B2211/30505 ,  F15B2211/30515 ,  F15B2211/3057 ,  F15B2211/31558 ,  F15B2211/353 ,  F15B2211/411 ,  F15B2211/41527 ,  F15B2211/426 ,  F15B2211/50545 ,  F15B2211/50581 ,  F15B2211/5059 ,  F15B2211/5153 ,  F15B2211/5159 ,  F15B2211/555 ,  F15B2211/7053 ,  F15B2211/761 ,  F15B2211/8609

Abstract: A hydraulic system can include a hydraulic actuator including a first port and a second port.; a hydraulic pump; a hydraulic reservoir; a first control valve operable to selectively control flow from the hydraulic pump to the first port; a first control valve operable to selectively control flow from, the hydraulic pump and the hydraulic reservoir to one or both of the first port and the second port; a load-holding valve positioned between the first control valve and the first port in a first fluid pathway; a first counterbalance valve located between the hydraulic reservoir and the first port in a second fluid pathway that is parallel to the first fluid pathway; and a controller for operating the hydraulic system, and including a lowering mode and/or an. actuation mode.

公开(公告)号：WO2023006238A1

公开(公告)日：2023-02-02

申请号：PCT/EP2022/025026

申请日：2022-01-26

Applicant: DANFOSS POWER SOLUTIONS II TECHNOLOGY AS

Inventor： LOWMAN, Roger D. ,  LARISH, Chad Anthony ,  SMITH, Stephen ,  NEWBAUER, Sam

IPC: E02F9/22 ,  F15B21/14 ,  F15B1/02 ,  F15B21/08 ,  E02F9/2207 ,  E02F9/2217 ,  E02F9/2296 ,  F15B1/021 ,  F15B21/082 ,  F15B2211/3057 ,  F15B2211/3144 ,  F15B2211/327 ,  F15B2211/625 ,  F15B2211/6313 ,  F15B2211/665 ,  F15B2211/6656 ,  F15B2211/7053 ,  F15B2211/8613

Abstract: A hydraulic system can include a hydraulic actuator including a piston rod slidably disposed within a housing having a base-side port and a rod-side port, a hydraulic pump, a hydraulic reservoir, an accumulator, a first control valve operable to selectively control flow from the pump to the base-side port and from the base-side port to the reservoir, a second control valve operable to selectively control flow from the pump to the rod-side port and from the rod-side port to the reservoir, a third control valve operable to selectively allow flow between the base-side port and the accumulator, and a controller for operating the hydraulic system and including a ride control mode in which damping is provided to the hydraulic actuator by operation of the first, second, and third control valves.