Cylinder Volume
This engine has a
transparent cylinder so that combustion can be observed. Two components of
cylinder volume are important:
(a) The "Displacement volume" is
the volume displaced by the piston as it moves between top dead center (tdc)
and bottom dead center (bdc). This volume determines the capacity of the engine.
(b)
The "Clearance volume" of the engine is the volume between
the cylinder head and the piston when the piston is at tdc. The ratio of
this volume to the swept volume determines the compression ratio of the engine.
From, Cengel & Boles,
"Thermodynamics" McGraw
Hill (1989)