Performance Analysis of A Spark Ignition (SI) Otto Cycle (OC) Gasoline Engine Under Realistic Power (RP) And Realistic Power Density (RPD) Conditions, pages: 475-486




This study presents performance optimization of  an Otto cycle (OC) gasoline engine using new criteria named as realistic power (RP) and realistic power density (RPD) conditions based on finite-time thermodynamics (FTT). The effects of design and operating parameters such as cycle temperature ratio, cycle pressure ratio, friction coefficient, engine speed, mean piston speed, stroke length, inlet temperature, inlet pressure, equivalence ratio, compression ratio and bore-stroke length ratio on the performance parameters such as effective efficiency, effective power and power density have been examined. Moreover, the energy losses have been determined as fuel's energy and they have been illustrated based on incomplete combustion, friction, heat transfer and exhaust output by using figures. Realistic values of specific heats have been used depend on temperature of working fluid. The results obtained demonstrated that the engine performance increases with increasing some parameters such as cycle temperature ratio, cycle pressure ratio, inlet pressure; with decreasing some parameters such as friction coefficient, inlet temperature. However, the engine performance could increase or decrease with respect to different conditions for some parameters such as engine speed, mean piston speed, stroke length, equivalence ratio and compression ratio. The results of this study could be used an engineering tool by Otto cycle engine designers.

Anahtar Kelimeler

Otto cycle, Spark Ignition Engine, Engine performance, Power density, Finite-time thermodynamics


Mozurkewich M. and Berry R. S., “Optimal Paths for Thermodynamic Systems: The Ideal Otto Cycle”, J. Appl. Phys., 53(1): 34–42, (1982).

Wu C. and Blank D. A., “The Effects Of Combustion on a Work-Optimized Endoreversible Otto Cycle”, J. Inst. Energy, 65: 86–89, (1992).

Wu C. and Blank D. A., “Optimization of the Endoreversible Otto Cycle with Respect to Both Power and Mean Effective Pressure”, Energy Convers. Manage., 34: 1255–1259, (1993).

Chen L., Wu C., Sun F. and Caoi S., “Heat Transfer Effects on the Net Work Output and Efficiency Characteristics For An Air standard Otto Cycle”, Energy Convers. Manage., 39: 643–648, (1998).

Wu C., Puzinauskas P. V. and Tsai J. S., “Performance analysis and optimization of a supercharged Miller cycle Otto engine”, Appl. Therm. Eng., 23: 511-521, (2003).

Durmayaz A., Sogut O. S., Sahin B. and Yavuz H., “Optimization of thermal systems based on finite-time thermodynamics and thermoeconomics”, Prog. Energ. Combust. Sci., 30: 175–217, (2004).

Ge Y., Chen L., Sun F. and Wu C., “Thermodynamic Simulation of Performance of an Otto Cycle with Heat Transfer and Variable Specific heats for the Working Fluid”, Int. J. Therm. Sci., 44(5): 506–511, (2005).

Ge Y., Chen L., Sun F. and Wu C., “The Effects of Variable Specific-Heats of the Working Fluid on the Performance of an Irreversible Otto cycle”, Int. J. Exergy, 2(3): 274–283, (2005).

Chen J., Zhao Y. and He J., “Optimization Criteria for the Important Parameters of an Irreversible Otto Heat-Engine”, Appl. Energy, 83: 228-238, (2006).

Ozsoysal O. A., “Heat Loss as a Percentage of the Fuel’s Energy in Air Standard Otto and Diesel Cycles”, Energy Convers. Manage., 47(7-8): 1051–1062, (2006).

Ge Y., Chen L., Sun F. and Wu C., “Finite-Time Thermodynamic Modelling and Analysis of an Irreversible Otto-Cycle”, Appl. Energy, 85: 618-624, (2008).

Hou S. S., “Comparison of the Performances of Air Standard Atkinson and Otto Cycles with Heat-Transfer Considerations”, Energy Convers. Manage., 48(5): 1683–1690, (2007).

Abu-Nada E., Al-Hinti I., Akash B. and Al-Sarkhi., “Thermodynamic analysis of spark-ignition engine using a gas mixture model for the working fluid”, Int. J. Energy Res. 31: 1031–1046, (2007).

Lin J. C. and Hou S. S., “Effects of Heat Loss As Percentage of Fuel’s Energy, Friction And Variable Specific Heats Of Working Fluid On Performance of Air Standart Otto Cycle”, Energy Convers. Manage., 49: 1218–1227, (2008).

Lin J. C and Hou S. S., “Performance analysis of an air-standard Miller cycle with considerations of heat loss as a percentage of fuel’s energy, friction and variable specific heats of working fluid”, Int. J. Therm. Sci., 47: 182–191, (2008).

Wang H., Liu S. and He J., “Performance analysis and parametric optimum criteria of a quantum Otto heat engine with heat transfer effects”, Appl. Therm. Eng., 29: 706-711, (2009).

Ust Y., Sahin B. and Safa A., “The Effects of Cycle Temperature and Cycle Pressure Ratios on the Performance of an Irreversible Otto Cycle”, Acta Phys. Pol. A, 120: 412–416, (2011).

Cesur I., Parlak A,. Ayhan V., Gonca G. and Boru B., “The effects of electronic controlled steam injection on spark ignition engine”, Appl. Therm. Eng., 55: 61–68, (2013).

Shu G., Pan J. and Wei H., “Analysis of onset and severity of knock in SI engine based on in-cylinder pressure oscillations”, Appl. Therm. Eng., 51(1-2): 1297-1306, (2013).

Gharehghani A., Koochak M., Mirsalim M. and Yusaf T., “Experimental investigation of thermal balance of a turbocharged SI engine operating on natural gas”, Appl. Therm. Eng. 60(1-2): 200-207, (2013).

Irimescu A., Tornatore C., Marchitto L. and Merola S. S., “Compression ratio and blow-by rates estimation based on motored pressure trace analysis for an optical spark ignition engine”, Appl. Therm. Eng., 61(2): 101-109, (2013).

Boretti A., “Water injection in directly injected turbocharged spark ignition engines”, Appl. Therm. Eng., 52: 62-68, (2013).

Xie F. X., Li X. P., Wang X.C., Su Y. and Hong W., “Research on using EGR and ignition timing to control load of a spark-ignition engine fueled with methanol”, Appl. Therm. Eng., 50(1): 1084-1091, (2013).

Pan M., Shu G., Wei H., Zhu T., Liang Y. and Liu C., “Effects of EGR, compression ratio and boost pressure on cyclic variation of PFI gasoline engine at WOT operation”, Appl. Therm. Eng., 64(1-2): 491-498, (2014).

Li Z. H., He B. Q. and Zhao H., “Application of a hybrid breakup model for the spray simulation of a multi-hole injector used for a DISI gasoline engine”, Appl. Therm. Eng. 65(1-2): 282-292, (2014).

Mendiburu A. Z., Roberts J. J., Carvalho J. A. and Silveira J. L., “Thermodynamic analysis and comparison of downdraft gasifiers integrated with gas turbine, spark and compression ignition engines for distributed power generation”, Appl. Therm. Eng. 66(1-2): 290-297, (2014).

Merola S. S., Marchitto L., Tornatore C., Valentino G. and Irimescu A., “Optical characterization of combustion processes in a DISI engine equipped with plasma-assisted ignition system”, Appl. Therm. Eng. 69(1-2): 177-187, (2014).

Pradeep V., Bakshi S. and Ramesh A., “Scavenging port based injection strategies for an LPG fuelled two-stroke spark-ignition engine”, Appl. Therm. Eng., 67(1-2): 80-88, (2014).

Najjar Y. S. H., Ghazal O. H. and AL-Khishali K. J. M., “Performance improvement of green cars by using variable-geometry engines”, J. Energy Ins., 87(4): 393-400, (2014).

Gürbüz H., Akçay I. H. and Buran D., “An investigation on effect of in-cylinder swirl flow on performance, combustion and cyclic variations in hydrogen fuelled spark ignition engine”, J. Energy Ins., 87(1): 1-10, (2014).

Hanipah M. R., Mikalsen R. and Roskilly A. P., “Recent commercial free-piston engine developments for automotive applications”, Appl. Therm. Eng., 75: 493-503, (2015).

Wang T., Li W., Jia M., Liu D., Qin W. and Zhang X., “Large-eddy simulation of in-cylinder flow in a DISI engine with charge motion control valve: Proper orthogonal decomposition analysis and cyclic variation”, Appl. Therm. Eng. 75: 561-574, (2015).

Cucchi M. and Samuel S., “Influence of the exhaust gas turbocharger on nano-scale particulate matter emissions from a GDI spark ignition engine”, Appl. Therm. Eng. 76: 167-174, (2015).

Calam A., Solmaz H., Uyumaz A., Polat S., Yilmaz E and İçingür Y., “Investigation of usability of the fusel oil in a single cylinder spark ignition engine”, J. Energy Ins., 88(3): 258-265, (2015).

Wu C., Deng K. and Wang Z., “The effect of combustion chamber shape on cylinder flow and lean combustion process in a large bore spark-ignition CNG engine”, J. Energy Ins., 89(2): 240-247, (2016).

Beccari S., Pipitone E. and Genchi G., “Knock onset prediction of propane, gasoline and their mixtures in spark ignition engines”, J. Energy Ins., 89(1): 101-114, (2016).

Gonca G., Sahin B., Ust Y. and Parlak A., “Comprehensive performance analyses and optimization of the irreversible thermodynamic cycle engines (TCE) under maximum power (MP) and maximum power density (MPD) conditions”, Appl. Therm. Eng. 85: 9-20, (2015).

Bagirov H., Can I., Oner C., Sugozu I. and Kapicioglu A., “Experimental investigation the effects of mixture impoverished on the specific fuel consumption, engine performance and exhaust emissions a pre-combustion chamber gasoline engine”, J. Energy Ins., 88(3): 205-208, (2015).

Najjar Y. S. H. and Amer M. M. B., “Using a smart device and neuro-fuzzy control system as a sustainable initiative with green cars”, J. Energy Ins., 89(2): 256-263, (2016).

Gonca G., Sahin B., Ust Y. and Parlak A., “A Study on Late Intake Valve Closing Miller Cycled Diesel Engine”, Arab. J. Sci. Eng., 38: 383-293, (2013).

Ebrahimi R., “Performance analysis of an irreversible Miller cycle with considerations of relative air–fuel ratio and stroke length”, Appl. Math. Model., 36: 4073-4079, (2012).

Ebrahimi R., “Thermodynamic modeling of performance of a Miller cycle with engine speed and variable specific heat ratio of working fluid”, Computers and Mathematics with Applications, 62: 2169-2176, (2011).

Ebrahimi R., “Effects of mean piston speed, equivalence ratio and cylinder wall temperature on performance of an Atkinson engine”, Mathematical and Computer Modelling, 53: 1289-1297, (2011).

EES Academic Professional Edition, V.9.701-3D, USA, F-Chart Software, (2014).

Ferguson C. R., “Internal combustion engines – applied thermosciences”, John Wiley & Sons Inc., New York, (1986).

Hohenberg G. “Advanced Approaches for Heat Transfer Calculations”, SAE, 790-825, (1979).

Lin J., Chen L., Wu C. and Sun F., “Finite-Time Thermodynamic Performance of a Dual Cycle”, Int. J. Energy Res., 23(9): 765–772, (1999).

Gonca G., “Effects of engine design and operating parameters on the performance of a spark ignition (SI) engine with steam injection method (SIM)”, Appl. Math. Model., In press., (2017).

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