#Swept_Volume
Swept volume can be defined as the volume swept by the engine piston during one stroke.
Swept volume is also the product of piston area and stroke.
#Clearance_Volume:
Clearance volume can be defined as the volume that remains in the cylinder when the engine piston is in the top-centre position.
Clearance volume can also be defined as the difference between the total cylinder volume and the swept volume. The space covered by the clearance volume also forms the combustion chamber.
#Compression_Ratio
Compression ratio can be defined as the value obtained by dividing the total cylinder volume by the clearance volume.
Marine engines with smaller cylinders will have higher compression ratio.
#Volumetric_efficiency
Volumetric efficiency can be defined as the ratio of the volume of air drawn in to the cylinder to the
swept volume.
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