Two-Way Two-Position Valve
Two-position valve that controls flow between two ports
The Two-Way Two-Position Valve component allows flow between ports A and P with two positions to control the flow.
The real input s controls the position of the value. An input of 0 corresponds to position 0, an input of 1 to position 1. Intermediates values produce an averaged position, with the transition length set by the band parameter.
The following figure shows how s and band effect the valve opening.
Two approaches were taken for formulation of the flow equation inside the device. When the boolean parameter Use constant Cd is true, a constant coefficient of discharge (Cd) is used, otherwise a variable coefficient of discharge with maximum value (Cd⁡max) and a critical flow number (Critno) are used.
Hydraulic port to path A
Hydraulic port for pump
Real input signal that controls valve position
Maximum orifice opening area
Minimum orifice opening area (leakage)
Transition length in normalized spool displacement
Use constant Cd
True (checked) means a constant coefficient of discharge is implemented, otherwise a variable Cd is used in flow calculation
Flow-discharge coefficient; used when Use constant Cd is true
Reynolds number at critical flow; used when Use constant Cd is true
Maximum flow-discharge coefficient; used when Use constant Cd is false
Critical flow number; used when Use constant Cd is false
Use volume A
True (checked) means a hydraulic volume chamber is added to portA
Volume of chamber A
Use volume P
True (checked) means a hydraulic volume chamber is added to portP
Volume of chamber P
For more information see Port Volumes.
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