Open AccessPerformance analysis of a novel six-stroke Otto cycle engine
Author(s) -
Emre Arabacı
Publication year - 2021
Publication title -
thermal science/thermal science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.339
H-Index - 43
eISSN - 2334-7163
pISSN - 0354-9836
DOI - 10.2298/tsci190926144a
Subject(s) - thermal efficiency , four stroke engine , stroke (engine) , two stroke engine , residual , heat engine , thermodynamic cycle , working fluid , fraction (chemistry) , automotive engineering , engine efficiency , environmental science , exhaust gas , thermal , power (physics) , materials science , computer science , thermodynamics , compression ratio , internal combustion engine , engineering , physics , chemistry , combustion chamber , organic chemistry , algorithm , combustion
In this study, a simulation model with finite time thermodynamics was presented for an Otto cycle six-stroke engine. In this six-stroke engine, two free strokes occur after the exhaust stroke. These free strokes cause the engine to have higher thermal efficiency. Due to high thermal efficiency, these six-stroke engines can be used in hybrid electric vehicles. In this study, the effect of residual gas fraction and stroke ratio on the effective power and effective thermal efficiency were investigated. In addition, heat balance was obtained for the engine and the use of fuel energy in the engine was examined with the help of performance fractions. In the simulation model, the results are quite realistic as the working fluid was assumed to consist of fuel-air-residual gases mixture.