Question: A compression ignition engine operates on the ideal diesel cycle with a compression ratio of 2 0 . The air is initially at 2 2

A compression ignition engine operates on the ideal diesel cycle with a compression ratio of 20. The air is initially at 22 degrees Celsius, 100 kPa, and the volume before compression is 100 cm^3. After heat addition, the temperature of the air is 1380 K. Determine:
a. Sketch the 4 stages of the cycle on the piston-cylinders below, showing correct positions for the piston (rough, not to scale), and label the arrows to indicate the type of process.
b. the cut-off ratio and the pressure after heat addition.
c. The thermal efficiency of the cycle.

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