Ideal Diesel cycle Details about Diesel Marine Aeronautical Engine

P-V Diagram for the Ideal Diesel Cycle.

Rudolf Diesel was born in paris in 1858 into a family of German expatriates. He was educated at Muich Polytechnic. Diesel designed many heat engines, including a solar-powered air engine.
This figure p is pressure and V is specific volume . The Ideal Diesel cycle follows the following four distnct processes.

1. Process 1 to 2 is isetropic compression of the fluid(blue color)

2. Process 2 to 3 is reversible constant pressure heating (red)

3. Precess 3 to 4 is isentropic expansion (yellow)

4. Process 4 to 1 is reversible constant volume cooling (green)

Tne Diesel in a heat engine:it converts heat into work. The isetropic processes are impermeable to heat:heat flows tnto the loop through the left expanding isobaric process and some of it flows back out through the right depressurizing process and the heat that remains does the work.

(1) Work in W(in) is done by the piston compressing the working fluid.

(2) Heat in Q(in) is done bythe combustion of the fuel.

(3) Work out W(out)in done by the working fluid expanding on to the piston (this produces usable torque).

(4) Heat out Q(out) is done by venting the air.

The Diesel cycle is a conbusion process of a reciprocating internal combustion engine. In it, fuel is ignited by hear generated by compressing air in the compresion chamber, into which fuel is injected .
Marine engine and Aeronautical engine in a internal combustion engine and it work system follow the Diesel cycle but Aeronautical engine is petrol engine and Marine engines fuel is Diesel fuel.