The cut-off ratio is the volume of the combustion chamber at the end of the combustion process divided by the volume at the start of combustion. This ratio is crucial in determining the efficiency and performance of an engine, especially in compression ignition engines like those found in diesel cycles. It helps to define how much fuel is injected and burned during each cycle, impacting overall engine power and emissions.
congrats on reading the definition of cut-off ratio. now let's actually learn it.