Air-Fuel Mixture Temperatures with Light and Heavy Fuels for Effective Spark Ignition Engine Work


  • Veljo Raide Institute of Technology, Estonian University of Life Sciences, Tartu, Estonia
  • Risto Ilves Institute of Technology, Estonian University of Life Sciences, Tartu, Estonia
  • Jüri Olt Institute of Technology, Estonian University of Life Sciences, Tartu, Estonia



combustion, heated air-fuel mixture temperature, heat release rate, spark-ignited heavy fuels


This research resulted from military interest in finding methods to provide distributed electricity generation in order to support comprehensive state defence measures. The aim of the study was to investigate the effect of a heated air-fuel mixture on the combustion process of a spark ignition (SI) engine, and to highlight the maximum temperatures to be applied to air-fuel mixtures with different fuel fractions in order to avoid any detonation of the fuel mixture in the engine. Tests were carried out with a petrol engine generator (GENSET) so that an investigation could be conducted into the effect of the air-fuel mixture on the engine’s combustion. It turned out that heating the air-fuel mixture permits the use of heavier fraction fuels than engine petrol in SI engines does, including diesel fuel and biodiesel fuel, and also that the use of heavy fraction fuels in SI engines is effective mainly under low and middle loads.

Author Biographies

Veljo Raide, Institute of Technology, Estonian University of Life Sciences, Tartu, Estonia

Estonain Defence Forces, Defence Academy, Center of Applied Research

Doctoral student in Estonian University of Lifesciences


Risto Ilves, Institute of Technology, Estonian University of Life Sciences, Tartu, Estonia


Jüri Olt, Institute of Technology, Estonian University of Life Sciences, Tartu, Estonia



KÜÜT, A., R. ILVES, V. MIKITA and J. OLT. Cost of ethanol when used in die-sel engine. Engineering for Rural Development. vol. I, pp. 366–371, 2012.

KÜÜT, A and J. OLT. Use of bioethanol fuel as regular fuel. Actual Tasks on Agricultural Engineering, Opatija. 2010, vol. 38, pp. 291–298. [Online]. Available:,2010.

ILVES, R. and J. OLT. Influence of the drop size of bioethanol fuel in air-fuel mixture on combustion process of spark-ignition engine. Agronomy Research 2014, 12(2), pp. 341–350.

ILVES, R. and J. OLT. Study of prior art of spark ignition engine fuel supply system. Agronomy Research. 2012, Special Issue 1, 55-74.

PERA, M. E. The Reality of the Single-Fuel Concept. Professional Bulletin of Unitete States Army Logistics. 2005, vol. 37, no. March-April, p. 6.

NATO. NATO Logistic Handbook Chapter 15 Fuels, Oils, Lubrications and Petrol Handling Equipment. [online]. 1997 [viewed 2020-10-21]. Available from:

RASLAVIČIUS, L. and D. MARKŠAITIS. Research into three-component bio-diesel fuel combustion process using a single droplet technique. TRANSPORT. 2007, vol. 22, no. 4, pp. 312–315,

ALLABBAD, M. et al. Autoignition of straight-run naphtha: A promising fuel for advanced compression ignition engines. Combust. Flame, 2018, Mar, vol. 189, pp. 337–346.

HOPPE, F. et al. Tailor-made fuels for future engine concepts. Int. J. Engine Res., 2016, Jan., vol. 17, no. 1, pp. 16–27.

RAIDE, V., R. ILVES, K. KÜÜT and J.OLT. Development of heat exchange reac-tor for preparation of air-fuel mixture in spark ignition engine. Presented at the 17th International Scientific Conference Engineering for Rural Development, May 2018,

MODA, S.U.S. Computional modeling and analysis of heavy fuel feasibility in direct injection spark ignition engine. Wright State University. [MSEgr Thesis] 2011. Jan.

GROENEWEGEN, J.R.J. The performance and emissions characteristics of heavy fuels in a small, spark ignition engine. University of Dayton, Mechanical Engineering, Master of Science (M.S.), Electronic Thesis or Dissertation [online] Ohio, 2011. Available from: acc_num=dayton1323369703.

GARIPOV, M., J. SAKULIN and R. REZVANOV. Characteristics of a spark-ignition two-stroke engine with diesel fuel. Ugatu. 2017, vol. Т. 21, Nr. 2 (76). pp. 30–41. Available from:

FALKOWSKI, T., D. L. ABATA and P. CHO. The Performance of a Spark-Ignited Stratified-Charge Two Stroke Engine Operating on a Kerosine Based Aviation Fuel. Michigan Technological Univ., 1997 SAE International Off-Highway and Powerplant Congress and Exposition. 1997, Sep. p. 972737.

MAHMOUDZADEH, A., A. PESYRIDIS, V. ESFAHANIAN and M. SAID. Com-bustion and Emission Enhancement of a Spark Ignition Two-Stroke Cycle Engine Utilizing Internal and External Exhaust Gas Recirculation Approach at Low-Load Operation. Energies. 2019, Feb., Vol. 12, no. 4, p. 609.

SHANMUGHASUNDARAM, P., V. GOPINATH and P. SURESH. Performance and emission characteristics of a diesel engine fuelled by corn oil biodiesel blends with air pre-heater. Mechanics. 2017, Jun., vol. 23, no. 3, pp. 462–468.

SHARMA, V., J.M. BABU, R. NARESH, S. GOWTHAMAN and R. MARIAPPAN. Design and Fabrication of Air Preheater for Diesel Engine. Inno-vative Design, Analysis and Development Practices in Aerospace and Automotive Engineering, New Delhi: Springer India, 2014, pp. 261–267. ISBN: 978-81-322-1871-5.

KASTURI, M.L., A. S. PATIL, N. P. SHINDE, and P. R. JAGTAP. Effect of Inlet Air Preheating on Exhaust Gases in Single Cylinder I.C Engine. International Re-search Journal of Engineering and Technology (IRJET). 2017, July, Volume: 04 Issue: 07. Available from: RG.2.2.12523.23846

GHALY, A.M., Y.A. ELDRAINY, W.M. EL-MAGHLANY and A.M. YOUSEF. Novel thermal throttling model in spark ignition engines: A way to replace a me-chanical one. Thermal Science and Engineering Progress. 2017, Dec., vol. 4, pp. 223–230.

GUPTA, M., P. P. R. AGARWAL and S. DEBANJAN. Design and Review of Fuel Vaporization System. International Journal of Mechanical Enigeering Re-search (IJMER). 2018, June, vol. 6, Issue 2, pp 5-8.

DACCORD, R. Cost to benefit ratio of an exhaust heat recovery system on a long haul truck. Energy Procedia. 2017, Sep., vol. 129, pp. 740–745.

EFTEKHAR, M. and A. KESHAVARZ. Reducing the emissions and fuel con-sumption of a spark ignition engine by utilizing heat exchangers in the exhaust gas stream. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering.2011, June, vol. 225, no. 6, pp. 760–770.

LIU, R. M. WEI and H. Yang. Cold start control strategy for a two-stroke spark ignition diesel-fuelled engine with air-assisted direct injection. Applied Thermal Engineering. 2016, Sep., vol. 108, pp. 414–426.

LEE, S. and C. BAE. The application of an exhaust heat exchanger to protect the catalyst and improve the fuel economy in a spark-ignition engine. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engieer-ing. 2007, May, vol. 221, no. 5, pp. 621–628.

AMICABILE, S., J.-I. LEE and D. KUM. A comprehensive design methodology of organic Rankine cycles for the waste heat recovery of automotive heavy-duty diesel engines. Applied Thermal Engineering. 2015, Aug., vol. 87, pp. 574–585.

PIZZONIA, F., T. CASTIGLIONE AND S. BOVA. A Robust Model Predictive Control for efficient thermal management of internal combustion engines. Ap-plied Energy. 2016, May, vol. 169, pp. 555–566.

SHAHADAT, M.M.Z., M.N. NABI, M.S. AKHTER and M.S.H.K. TUSHAR. Combined Effect of EGR and Inlet Air Preheating on Engine Performance in Die-sel Engine. International Energy Journal. 2008, June, vol. 9 pp. 109–116. , 2008. Available from:

NADAF, S.L., and P. B. GANGAVATI. A REVIEW ON WASTE HEAT RE-COVERY AND UTILIZATION FROM DIESEL ENGINES. International Journal of Advanced Engineering Technology. 2014, Oct.-Dec., vol. V, Issue IV, pp. 31-39. E-ISSN 0976-3945.

WALKER, D.H., A.C. HARVEY and N.B. LONGO. Fog carburettor. US20100170481A1, Jul. 08, 2010.

ZHAO, J.L., L. ZHOU, Z. ZHAO, X. WANG and F. ZHANG. Research on knock-ing characteristics of kerosene spark-ignition engine for unmanned aerial vehicle (UAV) by numerical simulation. Thermal Science and Engineering Progress. 2019, Mar., vol. 9, pp. 1–10.

AL-ABDULLAH, M.H., G.T. KALGHATGI and H. BABIKER. Flash points and volatility characteristics of gasoline/diesel blends. Fuel. 2015, Aug., vol. 153, pp. 67–69.

HISSA, M., S. Niemi, K. SIRVIÖ, A. NIEMI and T. OVASKA. Combustion Stud-ies of a Non-Road Diesel Engine with Several Alternative Liquid Fuels. Ener-gies. 2019, Jun., vol. 12, p. 2447.

EJIM, C. E., B. FLECK and A. AMIRFAZLI. Analytical study for atomization of biodiesels and their blends in a typical injector: Surface tension and viscosity ef-fects. Fuel. 2007, Jul., vol. 86, pp. 1534–1544.

SZYBIST, J.P. et al. What fuel properties enable higher thermal efficiency in spark-ignited engines? Progress in Energy and Combustion Science. 2021, Jan., vol. 82, p. 100876.

MOURAD, M. and K. MAHMOUD. Investigation into SI engine performance characteristics and emissions fuelled with ethanol/butanol-gasoline blends. Re-newable Energy. 2019, Dec., vol. 143, pp. 762–771.

RT. Environmental Requirements for Liquid Fuels, Sustainability Criteria for Biofuels, Procedures for Monitoring and Reporting the Environmental Compli-ance of Liquid Fuels and Methodology for Determining the Reduction of Green-house Gas Emissions from the Use of Biofuels and Liquid Biofuels. Government Gazette. 2016. Available from: (accessed Nov. 05, 2020).

EL-DIN, M., M.R. MISHRIF, M. GAD and M. KESHAWY. Performance and exhaust emissions of a diesel engine using diesel nanoemulsions as alternative fuels. Egyptian Journal of Petroleum. 2019, June, Volume 28, Issue 2, pp. 197-204.

RAI, R.K., and R.R. SAHOO. Effective power and effective power density analy-sis for water in diesel emulsion as fuel in diesel engine performance. Energy. 2019, Aug., vol. 180, pp. 893–902.

AATOLA, H., M. LARMI, T. SARJOVAARA, and S. MIKKONEN. Hydrotreated Vegetable Oil (HVO) as a Renewable Diesel Fuel: Trade-off between NOx, Par-ticulate Emission, and Fuel Consumption of a Heavy Duty Engine. SAE Int. J. Engines. 2008, Oct., vol. 1, no. 1, pp. 1251–1262.

SOLMAZ, H., H. YAMIK, A. UYUMAZ, S. POLAT, and E. YILMAZ. An exper-imental study on the effects of diesel and jet-A1 fuel blends on combustion, en-gine performance and exhaust emissions in a direct injection diesel engine. Jour-nal of Thermal Science and Technology, Isı Bilimi ve Tekniği Dergisi. 2016, Jan., vol. 36, pp. 51–60. ISSN 1300-3615.

RIMKUS, A., S. STRAVINSKAS and J. MATIJOŠIUS. Comparative Study on the Energetic and Ecologic Parameters of Dual Fuels (Diesel–NG and HVO–Biogas) and Conventional Diesel Fuel in a CI Engine. Journals Applied Science. 2020, Jan. 3, vol. 10, Art no. 1

GARRAIN, D., I. HERRERA, Y. LECHON and C. LAGO. Well-to-tank environ-mental analysis of a renewable diesel fuel from vegetable oil through co-processing in a hydrotreatment unit. Biomass Bioenergy. 2014, vol. 63, pp. 239–249. DOI:10.1016/j.biombioe.2014.01.035.

Kaletnik, H. et al. Study on performance of compression engine operated by biodiesel fuel. Agronomy Research. 2020, vol. 18, Special Issue 1, pp. 862-887. Available from: 10492/5616

HEYWOOD, J.B. Internal Combustion Engine Fundamentals. Second Edition. McGraw-Hill Education, 2018. ISBN: 978-1-260-11610-6.




How to Cite

Raide, V., Ilves, R., & Olt, J. (2021). Air-Fuel Mixture Temperatures with Light and Heavy Fuels for Effective Spark Ignition Engine Work. Advances in Military Technology, 16(2), 289–307.



Research Paper