|The article is part of the Thermodynamics series.|
The Trinkler cycle ( Seiliger cycle , Sabathe cycle ) is a thermodynamic cycle that describes the working process of a mixed-combustion diesel engine . It combines the Otto cycle and the Diesel cycle . It bears the name of its inventor Gustav Trinkler .
The ideal Trinkler cycle consists of processes:
- 1-2 In the working cylinder, the air is adiabatically compressed due to the inertia of the flywheel sitting on the engine shaft, heating up to a temperature that ignites the fuel-air mixture.
- 2-3 Combustion of part of the fuel in a small volume of the prechamber (V = const).
- 3-4 Burning out of the remaining fuel in the working cylinder (P = const).
- 4-5 Adiabatic expansion of combustion products.
- 5-1 Exhaust gas removal (V = const).
Liquid fuel introduced into the prechamber at a relatively low pressure is sprayed with a stream of compressed air coming from the main cylinder. At the same time, the mixed combustion cycle partially preserves the advantages of the Diesel cycle over the Otto cycle - part of the combustion process is carried out at constant pressure.
Thermal efficiency of the Trinkler cycle ,
Where - compression ratio,
- - the degree of preliminary expansion,
- - the degree of pressure increase during isochoric combustion process,
- Is the adiabatic index .
Special cases of the Trinkler cycle are the Otto cycle (with ) and the Diesel cycle (at )
- Piston internal combustion engine
- Thermodynamic cycle