Trinkler cycle

Thermodynamic cycles

Edwards Atkinson's Brighton / Joule Girna Diesel engine Viburnum Carnot Lenoir Miller Otto Rankina Stirling Trinkler Humphrey Ericsson
The article is part of the Thermodynamics series.
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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:

pV Trinkler cycle diagram

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 $\eta =1-{\frac {1}{n^{k-1}}}{\frac {\lambda m^{k}-1}{\lambda -1+k\lambda (m-1)}}$ ${\ displaystyle \ eta = 1 - {\ frac {1} {n ^ {k-1}}} {\ frac {\ lambda m ^ {k} -1} {\ lambda -1 + k \ lambda (m- one)}}}$ ${\ displaystyle \ eta = 1 - {\ frac {1} {n ^ {k-1}}} {\ frac {\ lambda m ^ {k} -1} {\ lambda -1 + k \ lambda (m- one)}}}$ ,

Where $n=V_{1}/V_{2}$ ${\ displaystyle n = V_ {1} / V_ {2}}$ ${\ displaystyle n = V_ {1} / V_ {2}}$ - compression ratio,

m=V_{4}/V_{3}

{\ displaystyle m = V_ {4} / V_ {3}}

{\ displaystyle m = V_ {4} / V_ {3}}

- the degree of preliminary expansion,

\lambda =p_{3}/p_{2}

{\ displaystyle \ lambda = p_ {3} / p_ {2}}

{\ displaystyle \ lambda = p_ {3} / p_ {2}}

- the degree of pressure increase during isochoric combustion process,

k

{\ displaystyle k}

k

Is the adiabatic index .

Special cases of the Trinkler cycle are the Otto cycle (with $m=1$ ${\ displaystyle m = 1}$ $m = 1$ ) and the Diesel cycle (at $\lambda =1$ ${\ displaystyle \ lambda = 1}$ $\ lambda = 1$ )

Trinkler cycle

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