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：US20200040867A1

公开(公告)日：2020-02-06

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

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.