Compression ration is a fundamental specification for many common combustion engines.
For calculating compression ratio you should know the swept volume and clearance volume of the engine cylinder. Then you can use the relation, r= 1+(Vs/Vc). Where, r- compression ratio, Vs- Swept Volume and Vc- Clearance Volume.
Compressed Volume = Head Gasket space + Deck Height space + Piston Top volume + Combustion chamber volume
Uncompressed Volume = Compressed Volume + Displacement
Compression Ratio = Uncompressed volume ÷ Compressed volume
What you calculate from swept and clearance volume is basically called geometric compression ratio.But effective compression ratio is different.
Hi everybody
you can find the response in a previous RG discussion
https://www.researchgate.net/post/What_is_the_difference_between_geometric_and_effective_compression_ration_in_IC_engines
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