Invention Grant
- Patent Title: Control strategy for hydraulic actuator with a pair of independent metering valves
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Application No.: US15808373Application Date: 2017-11-09
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Publication No.: US10408238B2Publication Date: 2019-09-10
- Inventor: Meng Wang , Michael Berne Rannow
- Applicant: Eaton Intelligent Power Limited
- Applicant Address: IE Dublin
- Assignee: Eaton Intelligent Power Limited
- Current Assignee: Eaton Intelligent Power Limited
- Current Assignee Address: IE Dublin
- Agency: Merchant & Gould P.C.
- Main IPC: F16D31/02
- IPC: F16D31/02 ; F15B13/04 ; F15B13/044 ; F15B11/00 ; F15B21/02 ; F15B21/08 ; F16K37/00 ; F15B11/08 ; G01F1/36 ; G01F15/00

Abstract:
Systems and methods for controlling valve assemblies associated with an actuator in an electro-hydraulic system are disclosed. In one method, a controller monitors hydraulic fluid flow for an actuator to identify one valve assembly connected to the actuator as a meter-in valve and another valve assembly connected to the actuator as a meter-out valve. In one aspect, the valve assembly most recently identified as the meter-in valve is controlled to maintain a pressure setpoint and the valve assembly most recently identified as the meter-out valve is controlled to maintain a hydraulic fluid flow rate. The method can also include determining whether the actuator is in a passive state or an overrunning state and controlling the valve most recently identified as the meter-in valve to maintain a first pressure setpoint when the actuator is in a passive state and to maintain a second pressure setpoint when the actuator is in an overrunning state.
Public/Granted literature
- US20180128292A1 CONTROL STRATEGY FOR HYDRAULIC ACTUATOR WITH A PAIR OF INDEPENDENT METERING VALVES Public/Granted day:2018-05-10
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