Explanation:
Compression ratio:
Compression ratio is the ratio of volume .Generally it is denoted by r.From the diagram we can say that the compression ratio r
[tex]r=\dfrac{V_1}{V_2}[/tex]
Generally compression ratio varies from 10 to 14 in petrol engine but on the other hand the compression ratio in diesel engine is more as compare to petrol .In diesel engine the compression ratio varies from 15 to 20.
Yes there is limit of compression ratio in Otto cycle.If compression ratio is high in Otto cycle then there will be more possibility of pre ignition of air fuel and this is called miss firing.This is not good for Otto cycle.
