P-V Diagram for the Ideal Diesel Cycle .
p is pressure and v is specific volume. The ideal Diesel cycle follows the following four distinct processes (The color references refer to the color of the line on the diagram.):
1. Process 1 to 2 is is entropic compression of the fluid(blue co lour)
2. Process 2 to 3 is reversible constant pressure heating (red)
3. Process 3 to 4 is isotropic expansion (yellow)
4. Process 4 to 1 is reversible constant volume cooling (green)
5. Work in (Win) is done by the piston compressing the working fluid
6. Heat in (In) is done by the combustion of the fuel
7. Work out (Out) is done by the working fluid expanding on to the piston (this produces usable torque)
8. Heat out (Out) is done by venting the air
Maximum thermal efficiency
The maximum thermal efficiency of a Diesel cycle is dependent on the compression ratio and the cut-off ratio.
Rudolf Diesel was born in Paris in 1858 into a family of German expatriates. He was educated at Munich Polytechnic.Diesel designed many heat engines, including a solar_powered air engine and in 1892 he received patents in Germany, Switzerland, the United Kingdom and field in the United States fo Method of and Apparatus for Converting heat into work.
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