Otto cycle consists of two isoentropic and two isochoric processes. Heat is supplied and heat is rejected by the cycle during isochoric process.
ressure-volume and Temperature-entropy diagram for the otto cycle
Where,
1-2: Adiabatic compression
2-3: Isochoric heat addition
3-4: Adiabatic expansion
4-1: Isochoric heat rejection
Heat supplied during constant volume process 2-3
Heat rejected during constant volume process 4-1
The thermal efficiency of Otto cycle can be given by the formula
All Comments
Thanks . I was looking for clear diagrams of Otto cycle P-V and T-s .
This isn’t right…the logic does not follow…your final step is the efficiency of a Carnot Engine.
The first two steps are fine but the final step should be:
η = 1-(Τ4-Τ1)/(Τ3-Τ2)
To finish this, you’ll need the compression ratio (r) and the ration of heat capacities (γ):
η = 1-1/r^(γ-1)