Question
For a given compression ratio, does an Otto cycle have a higher or lower efficiency than a diesel cycle?
Step 1
The Otto cycle is an idealized thermodynamic cycle that describes the functioning of a typical spark ignition piston engine. The Diesel cycle is a combustion process of a reciprocating internal combustion engine. Show more…
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Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression and heat input because, in Otto cycle (a) combustion is at constant volume (b) expansion and compression air isentropic (c) maximum temperature is higher (d) Heat rejection is lower
For a specified compression ratio, is a diesel or gasoline engine more efficient?
Do diesel or gasoline engines operate at higher compression ratios? Why?
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