An SI engine operates on an air-standard four-stroke Miller cycle with turbocharging. The intake valves close late, resulting in cycle XXXXXXXXXXin Fig. 16. Air–fuel enters the cylinders at 70°C and...

An SI engine operates on an air-standard four-stroke Miller cycle with turbocharging. The intake valves close late, resulting in cycle 6-7-8-7-2-3-4-5-6 in Fig. 16. Air–fuel enters the cylinders at 70°C and 140 kPa, and heat in by combustion equals Compression ratio expansion ratio and exhaust pressure

Calculate:

(a) Temperature at each state of the cycle. [°C]

(b) Pressure at each state of the cycle. [kPa] (c) Work produced during expansion stroke. [kJ/kg]

(d) Work of compression stroke. [kJ/kg]

(e) Net pumping work. [kJ/kg]

(f) Indicated thermal efficiency. [%]

(g) Compare with Problems 11 and 13.