This example shows the use of a 3-way valve to control the motion of a hydraulic differential cylinder. The valve connects cylinder port B either to tank or to cylinder chamber A through the fixed orifice. The cylinder extends when its ports are both connected to the pressure source due to difference in piston areas. Orifice B controls the extension speed. The cylinder retracts if chamber B is connected to tank.
This plot shows the position of the piston (system output) and the position of the valve spool (system input).
These plots show the pressure inside the cylinder, as well as the force between the piston and the hard stop inside the cylinder.