Compression Ratio IC Engine

Compression Ratio Points : Compression Ratio It is the ratio of the volume of the accuse in the cylinder over the piston at bottom dead centre and the volume of the charge when the piston is at top dead centre. Since the volume above the piston at bottom dead centre is the displacement of the cylinder plus the clearance volume and the volume above the piston at top dead centre is the clearance volume, the compression ratio also be stated as
Clearance volume + displacement volume / clearance volume