Define Clearance Volume and Swept Volume
Clearance Volume:
Clearance volume is a volume between the cylinder head and the piston top when the piston is at top dead center (TDC).
OR
It can also be defined as the volume of cylinder that is not swept by the piston.
Swept Volume:
The nominal volume swept by the working piston when travelling from one dead center to the other is called as displacement volume or Swept volume It is expressed in terms of cubic centimeter (cm3) and given by