An internal combustion engine operates according to the Otto cycle shown in the figure. The cycle consists of 4 stages:
1/ A-- B constant volume heating (ignition stage)
2/ B-- C adiabatic expansion
3/ C-- D constant volume cooling (fuel intake stage)
4/ D-- A adiabatic compression
Assume that the gasoline-air intake mixture is an ideal gas with $\gamma$= 1.30 and the compression ratio r = V_max/ Vmin is 4.00. find the efficiency of the engine?
Please, help

Question

An internal combustion engine operates according to the Otto cycle shown in the figure. The cycle consists of 4 stages:
1/ A--> B constant volume heating (ignition stage)
2/ B--> C adiabatic expansion
3/ C--> D constant volume cooling (fuel intake stage)
4/ D--> A adiabatic compression
Assume that the gasoline-air intake mixture is an ideal gas with $\gamma$= 1.30 and the compression ratio r = V_max/ Vmin is 4.00. find the efficiency of the engine?
Please, help

loser66 · Answer

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loser66 · Answer

@douglaswinslowcooper

anonymous · Answer

Looks like you need to integrate p dV around the cycle, using the
relationship for pV for adiabatic compression/expansion.

anonymous · Answer

That's p V^gamma = constant, if I recall correctly

loser66 · Answer

Let me try. Thank you

anonymous · Answer

You are welcome. One  part of the cycle will give input, the other output?