公开(公告)号：US20220307595A1

公开(公告)日：2022-09-29

申请号：US17606104

申请日：2020-04-24

Applicant: Danfoss Power Solutions II Technology A/S

Inventor： Avinash Amboji ,  Suhas Dhakate ,  Mohammedsaeed Inamdar ,  Shashishekar Ms

IPC: F16H61/431 ,  F15B11/17 ,  F15B13/02 ,  F15B15/18 ,  F16H61/452 ,  F16H61/4035 ,  F16H61/4157 ,  B60W10/18 ,  B60W10/08 ,  B60W10/30 ,  B60W30/188 ,  B60W30/18 ,  B60P3/16 ,  F16H61/47 ,  F16H61/4148 ,  F16H61/4008 ,  B28C5/42

Abstract: The present disclosure relates to a hydraulic drive system having a hydraulic circuit architecture operable in first and second modes. In a first mode, a main hydraulic pump (22) is used to drive a hydraulic actuator (24) via a closed hydraulic circuit, and a charge pump (42) provides charge flow to the closed hydraulic circuit. In a second mode the main pump set to zero displacement and the charge pump (42) is used to drive the hydraulic actuator (24).

公开(公告)号：US20220259829A1

公开(公告)日：2022-08-18

申请号：US17625197

申请日：2020-07-01

Applicant: Danfoss Power Solutions II Technology A/S

Inventor： Nilesh Anant Sutar

IPC: E02F9/22

Abstract: The present disclosure relates to systems that use a single proportional valve to control raising and lowering of a load. The present disclosure also relates to proportional valves that provide proportional flow control in first and second opposite flow directions through the proportional valve.

公开(公告)号：US11384510B2

公开(公告)日：2022-07-12

申请号：US17256834

申请日：2019-06-29

Applicant: Danfoss Power Solutions II Technology A/S

Inventor： Aaron H. Jagoda

IPC: E02F9/22 ,  F15B21/00

Abstract: A mobile hydraulic system includes a hydraulic actuator coupled to a load, and a control unit coupled to the load and/or to the hydraulic actuator. The control unit is adapted to anticipate an over-center transition of the load relative to a gravity vector prior to the over-center transition through the use of sensors configured with accelerometers, gyroscopes and magnetometers. In some examples, the over-center transition is from an overrunning driving of the load to a passive driving of the load. In some examples, the over-center transition is from a passive driving of the load to an overrunning driving of the load. In some examples, the control unit is adapted to control change in a metered flow through one or more ports of the associated actuator to minimize and/or prevent one or more hydraulic effects of the anticipated over-center transition. In some examples, the control unit controls the metered flow by causing one or more actuators (e.g., a solenoid) to shift one or more valve positions to change the flow through one or more ports of the associated actuator.