The diesel cycle is a combustion process in the internal combustion engine. In this process, fuel is ignited by heat produced during the compression of air in the combustion chamber, thereafter fuel is then injected.
The Diesel cycle is accepted to have a consistent pressing factor during the underlying piece of the burning stage. This is an idealized mathematical model: genuine actual diesel does have an expansion in pressure during this period, yet it is less articulated than in the Otto cycle. Conversely, the glorified Otto pattern of a fuel motor approximates a consistent volume measure during that stage.
This is as opposed to igniting off the fuel-air blend with a sparkle plug as in the Otto cycle engine. Diesel engines are utilized in airplanes, cars, power ages, diesel-electric trains, and both surface ships and submarines.
In the diesel cycle, there is consistent pressure during the initial phase of the combustion process.
Thermal Efficiency of Diesel cycle :
Formula for Diesel cycle Thermal efficiency can be written as follows:
Where,
Compression ratio = rk = v1/v2 ,
Expansion ratio = re = v4/v3 ,
Cut off ratio = rc = v3/v2 .
Application of Diesel Cycle
Diesel cycle is utilized where more power is required with less measure of fuel. Chiefly it is utilized in two-stroke and four-stroke diesel engines.