compression ignition engine operating as an ideal diesel cycle is referred. The cycle has a compression ratio of 20. At the initial of the compression process, the air is at 0.1 MPa and 17C. The cutoff ratio of the cycle is 2.1. Assume the variation of specific heats with temperature in the analysis. Solve the following questions. (a) Determine the thermodynamics properties (temperature and pressure) at the four main stages of the cycle. (b) Sketch a P-v diagram of the cycle. (c) Calculate the

(i) network output,

(i) thermal efficiency, and

(ii) mean effective pressure (MEP) of the cycle. (d) Compare the actual thermal efficiency of a typical automotive diesel engine to the one that you calculated in the above (c)

ii). Discuss.