The eccentricity between the piston housing and cylinder block centerlines determines the piston ... the piston/plunger moves to perform fluid suction and discharge. The diagram illustrates. Image ...

The large rods reduce the effective area of the piston on the rod end resulting in smaller retraction forces. Speed - The speed is controlled by valves, which control the flow of the hydraulic oil ...

starts with the piston at the top of the cylinder (TDC) and the intake valve open to admit air and fuel. At bottom-dead-center (BDC) the inlet valve is closed and the compression stroke (b) starts.