Single-Acting Cylinder with 3-Way Valve

This example shows a single-acting hydraulic cylinder controlled by a 3-way directional valve. The mass, viscous friction, and preloaded spring blocks represent the load. The pump is powerful enough to maintain constant pressure at the valve inlet. The signal from a Multiposition Valve Actuator block (Valve Actuator) controls the spool position of a 3-Way Directional Valve (IL) block (3-Way Valve).

At the start of the simulation, the valve connects the cylinder chamber to the tank by opening the passage between ports A and T. When the control signal fed into the valve actuator exceeds 12, which is 50% of the nominal signal value of the valve actuator, the spool moves to connect ports P and A. As a result, the cylinder chamber pressurizes, and the piston moves the load.

See Also

Upgrading Hydraulic Models to Use Isothermal Liquid Blocks