Hydraulic systems and methods for nested pressure regulating valves
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United States of America Patent
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Aug 16, 2022
Grant Date -
Oct 15, 2020
app pub date -
Apr 13, 2020
filing date -
Apr 12, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
A hydraulic system is provided. The hydraulic system may include a fluid pressure source in fluid communication with a supply line, a return line in fluid communication with a tank, a hydraulic function having a workport, a first control valve having a first proportional solenoid, a second control valve having a second proportional solenoid, and a controller. The controller being configured to selectively energize the first proportional solenoid, the second proportional solenoid, or the first proportional solenoid and the second proportional solenoid to control a system pressure differential, defined between the return line and the workport, within a range that is defined by a sum of a first predefined range defined by the first control valve and a second predefined range defined by the second control valve.
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