The internal combustion petrol engine can be modeled on the Otto cycle, the four stages consist of
Question:
(a) An adiabatic compression from V1 to V2,
(b) An isochoric (constant volume) pressure increase,
(c) An adiabatic expansion from V2 to V1 and
(d) An isochoric pressure decrease. Sketch the p – V diagram. Assuming that the gas behaves ideally, with a constant heat capacity, show that the efficiency is
n = 1 – 1/rγ–1
Where the compression ration r = V1/V2
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