The piston is returned to its original ... Figure caption, Circuit diagram of a unidirectional flow control valve placed between a SAC and a 3/2 valve with push button actuator.

The transparent engine case of the finished model means the moving parts are clearly visible when it’s operating, allowing you to see the interaction of the crankshaft, pistons, and valves ...

At top dead center (TDC), the piston must not hit the valves or the cylinder head. In the case of engines with stroker cranks, different-length con rods or nonstock-compression-height pistons ...