申論題

6. P-v diagram of an ideal air standard Otto cycle is shown here in which the salient points are 1, 2, 3, and 4, and the upper and lower limits of absolute temperatures are T₃ and T₁, and the constant-volume specific heat is Cv. Please state clearly all of your assumptions.

(d) (5%) What is the maximum theoretical efficiency of this engine if the fuel-air mixture is initially at 25℃ and the mixture is compressed by a factor of 7.8?