Hydraulic control system for linear actuation
AssigneeDanfoss Power Solutions Inc.
InventorsAaron Darnell, Zhekang Du, Simon Nielsen
Life of this patent
Estimating the term…
Abstract
A hydraulic control system for linear actuation that includes an electric motor connected to a hydraulic pump and a hydraulic cylinder connected to the pump by a first flow line. A pressure transducer, a pressure control valve, and a check valve are connected to the first flow line between the pump and the cylinder and a tank is connected to the pump by a second flow line and the cylinder by a return line. A control valve is connected between the first flow line and the return line.
Claims19
A hydraulic control system for linear actuation, comprising:
- an electric motor connected to a hydraulic pump;
- a hydraulic cylinder connected to the hydraulic pump by a first flow line;
- a pressure transducer, a pressure control valve, and a check valve connected to the first flow line between the hydraulic pump and the hydraulic cylinder;
- a tank connected to the hydraulic pump by a second flow line and the hydraulic cylinder by a return line;
- a control valve connected between the first flow line and the return line;
- and
- a proportional control valve connected between the first flow line and the return line.
A hydraulic control system for linear actuation, comprising:
- an electric motor connected to a hydraulic pump;
- a hydraulic cylinder connected to the hydraulic pump by a first flow line;
- a pressure transducer, a pressure control valve, and a check valve connected to the first flow line between the hydraulic pump and the hydraulic cylinder;
- the hydraulic cylinder connected to a return line;
- a control valve connected between the first flow line and the return line;
- and
- a proportional control valve connected between the first flow line and the return line;
- the proportional control valve connected to a processor and an operator command, wherein an opening area of the proportional control valve is controlled by the processor.
A hydraulic control system for linear actuation, comprising:
- an electric motor connected to a hydraulic pump;
- a hydraulic cylinder connected to the hydraulic pump by a first flow line;
- a pressure transducer, a pressure control valve, and a check valve connected to the first flow line between the hydraulic pump and the hydraulic cylinder;
- the hydraulic cylinder connected to a return line;
- a control valve connected between the first flow line and the return line;
- and
- a proportional control valve connected between the first flow line and the return line;
- and
- the proportional control valve operatively connected to a processor.
Dependencies are inferred from the claim text.