9.12 Efficiency of Diesel Cycle

9.12.1 Ideal Diesel Cycle

The ideal diesel cycle is a constant pressure cycle (Fig. 9.16).

 

Ideal diesel cycle

 

Fig. 9.16 Ideal diesel cycle

 

The cycle consists of two adiabatics: AB, CD, and two constant pressure lines: AD and BC. At A, the cylinder is completely filled with air at nearly atmospheric pressure drawn along the path EA. It is then compressed adiabatically along AB. At B, the oil valve opens and the fuel is injected. It ignites and the air expands at constant pressure till the point C is reached. The oil valve is closed and the volume expands adiabatically along CD. At D, the exhaust valve opens and pressure drops ...

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