Numerical/Experimental Study on Downsized Iranian National Engine (EF7) Performance at Low Engine Speeds

Document Type : Original Article

Authors

1 Faculty of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Iran

2 Faculty of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Iran; School of Mechanical, Aerospace and Automotive Engineering, Coventry University, Coventry, UK

Abstract

Engine downsizing is a trusted method to reduce fuel consumption and pollution emitted from internal combustion engines. In this method, engine displacement volume is reduced while maintaining the same power/torque characteristics. However, there still exist several limitations to utilize this technology. In this paper, the naturally aspirated type of Iran national engine (EF7-NA) is investigated for a possible downsized version. A one-dimensional engine model equipped with a zero-dimensional two-zone combustion sub-model was developed and validated via experimental results for both natural aspirated and turbocharged engine types. Then experimental and numerical studies were carried out for the primary concept, deactivation of one cylinder besides using a turbocharger. To overcome the concept shortages, especially in lower ranges of engine speed, numerical studies were extended. Deployment of several turbochargers with different performance maps and different valve timing via a dual CVVT system were investigated. The results showed that there is a feasible method for EF7 engine downsizing via a 3-cylinder type equipped with a modified turbocharger and valve timing. The maximum difference between base-engine and downsized version torque is about 7% in low engine speeds.

Keywords


  1. International Energy Agency. Policy pathways: improving the fuel economy of road vehicles – A policy package; 2011. https://www.iea.org/publications/freepublications/publication/policy-pathways-improving-the-fuel-economy-of-road-vehicles---a-policy-package.html
  2. Zhang, W., Yang, X., Wang, T., Peng, X. and Wang, X., "Experimental study of a gas engine-driven heat pump system for space heating and cooling", Civil Engineering Journal, Vol. 5, No. 10, (2019), 2282-2295. https://doi.org/10.28991/cej-2019-03091411
  3. Borowski, P.F., "New technologies and innovative solutions in the development strategies of energy enterprises", High Tech and Innovation Journal, Vol. 1, No. 2, (2020), 39-58. https://doi.org/10.28991/HIJ-2020-01-02-01
  4. Topçuoğlu, K., "Trombe wall application with heat storage tank", Civil Engineering Journal, Vol. 5, No. 7, (2019), 1477-1489. https://doi.org/10.28991/cej-2019-03091346
  5. Ravi, P., Devanandh, V., Pandey, S.K., Senthilnathan, K., Sadagopan, K. and Patel, B.P., Quasi-dimensional thermodynamic simulation study of downsizing on a four-cylinder turbocharged engine, in Advances in Energy Research, vol. 2, (2020), 563-575. https://doi.org/10.1007/978-981-15-2662-6_51
  6. Namar, M.M., Jahanian, O., Shafaghat, R. and Nikzadfar, K., "Feasibility study for downsizing ef7 engine, numerical and experimental approach", The Journal of Engine Research, Vol. 61, No. 61, (2021), 73-85. http://engineresearch.ir/article-1-758-en.html
  7. Cho, J., Kim, K., Baek, S., Myung, C.-L. and Park, S., "Abatement potential analysis on CO2 and size-resolved particle emissions from a downsized lpg direct injection engine for passenger car", Atmospheric Pollution Research, Vol. 10, No. 6, (2019), 1711-1722. https://doi.org/10.1016/j.apr.2019.07.002
  8. Knauder, C., Allmaier, H., Sander, D.E. and Sams, T., "Investigations of the friction losses of different engine concepts. Part 2: Sub-assembly resolved friction loss comparison of three engines", Lubricants, Vol. 7, No. 12, (2019), 105. https://doi.org/10.3390/lubricants7120105
  9. Namar, M.M. and Jahanian, O., "Energy and exergy analysis of a hydrogen-fueled hcci engine", Journal of Thermal Analysis and Calorimetry, Vol. 137, No. 1, (2019), 205-215. https://doi.org/10.1007/s10973-018-7910-7
  10. Jafari, B., Khatamnejad, H., Shahavi, M.H. and Domeyri Ganji, D., "Simulation of dual fuel combustion of direct injection engine with variable natural gas premixed ratio", International Journal of Engineering, Transactions C: Aspects, Vol. 32, No. 9, (2019), 1327-1336. https://dx.doi.org/10.5829/ije.2019.32.09c.14
  11. Namar, M.M. and Jahanian, O., "A simple algebraic model for predicting hcci auto-ignition timing according to control oriented models requirements", Energy Conversion and Management, Vol. 154, (2017), 38-45. https://doi.org/10.1016/j.enconman.2017.10.056
  12. Hassanzadeh Saraei, S., Jafarmadar, S., Khalilarya, S. and Taghavifar, H., "Effects of triple injection strategies on performance and pollutant emissions of a di diesel engine using cfd simulation", International Journal of Engineering, Transactions C: Aspects, Vol. 31, No. 6, (2018), 973-979. https://dx.doi.org/10.5829/ije.2018.31.06c.15
  13. Kazemian, M. and Gandjalikhan Nassab, S., "Thermodynamic analysis and statistical investigation of effective parameters for gas turbine cycle using the response surface methodology", International Journal of Engineering, Transactions B: Applications, Vol. 33, No. 5, (2020), 894-905. https://dx.doi.org/10.5829/ije.2020.33.05b.22
  14. Hu, K. and Chen, Y., "Technological growth of fuel efficiency in european automobile market 1975–2015", Energy Policy, Vol. 98, (2016), 142-148. https://doi.org/10.1016/j.enpol.2016.08.024
  15. Merker, G.P., Schwarz, C. and Teichmann, R., "Combustion engines development: Mixture formation, combustion, emissions and simulation, Springer Science & Business Media, (2011). https://doi.org/10.1007/978-3-642-14094-5
  16. Kuhlbach, K., Mehring, J., Borrmann, D. and Friedfeld, R., "Zylinderkopf mit integriertem abgaskrümmer für downsizing-konzepte", MTZ-Motortechnische Zeitschrift, 70, No. 4, (2009), 286-293. http://dx.doi.org/10.1007/BF03225480
  17. Smith, A., "Stroke of genius for gasoline downsizing", Ricardo Q Review, (2008), https://scholar.google.com/scholar_lookup?title=Stroke+of+genius+for+gasoline+downsizing&publication_year=2008
  18. Budack, R., Wurms, R., Mendl, G. and Heiduk, T., "Der neue 2, 0-l-r4-tfsi-motor von audi", MTZ-Motortechnische Zeitschrift, 77, No. 5, (2016), 16-25. http://dx.doi.org/10.1007/s35146-016-0035-2
  19. Wang, Y., Wei, H., Zhou, L., Li, Y. and Liang, J., “Effect of injection strategy on the combustion and knock in a downsized gasoline engine with large eddy simulation”, (2020), SAE Technical Paper. https://doi.org/10.4271/2020-01-0244
  20. Morikawa, K., Shen, F., Yamada, T., Moriyoshi, Y. and Kuboyama, T., "The extension of load range and low fuel consumption range based on the ultra-highly boosted downsized engine concept", Transactions of Society of Automotive Engineers of Japan, Vol. 51, No. 5, (2020). https://doi.org/10.11351/jsaeronbun.51.862
  21. Hancock, D., Fraser, N., Jeremy, M., Sykes, R. and Blaxill, H., “A new 3 cylinder 1.2 l advanced downsizing technology demonstrator engine” (2008), SAE Technical Paper. https://doi.org/10.4271/2008-01-0611
  22. Dönitz, C., Vasile, I., Onder, C. and Guzzella, L., “Realizing a concept for high efficiency and excellent driveability: The downsized and supercharged hybrid pneumatic engine”, (2009), SAE Technical Paper, https://doi.org/10.4271/2009-01-1326
  23. Splitter, D.A. and Szybist, J.P., "Experimental investigation of spark-ignited combustion with high-octane biofuels and egr. 1. Engine load range and downsize downspeed opportunity", Energy & Fuels, Vol. 28, No. 2, (2014), 1418-1431. https://doi.org/10.1021/ef401574p
  24. Attar, M.A., Herfatmanesh, M.R., Zhao, H. and Cairns, A., "Experimental investigation of direct injection charge cooling in optical gdi engine using tracer-based plif technique", Experimental Thermal and Fluid Science, Vol. 59, (2014), 96-108. http://dx.doi.org/10.1016/j.expthermflusci.2014.07.020
  25. Turner, J., Popplewell, A., Patel, R., Johnson, T., Darnton, N., Richardson, S., Bredda, S., Tudor, R., Bithell, C. and Jackson, R., "Ultra boost for economy: Extending the limits of extreme engine downsizing", SAE International Journal of Engines, Vol. 7, No. 1, (2014), 387-417. https://doi.org/10.4271/2014-01-1185
  26. Millo, F., Luisi, S., Borean, F. and Stroppiana, A., "Numerical and experimental investigation on combustion characteristics of a spark ignition engine with an early intake valve closing load control", Fuel, Vol. 121, (2014), 298-310. https://doi.org/10.1016/j.fuel.2013.12.047
  27. Severi, E., d’Adamo, A., Berni, F., Breda, S., Lugli, M. and Mattarelli, E., "Numerical investigation on the effects of bore reduction in a high performance turbocharged gdi engine. 3d investigation of knock tendency", Energy Procedia, Vol. 81, No., (2015), 846-855. https://doi.org/10.1016/j.egypro.2015.12.094
  28. Ma, J. and Zhao, H., “The modeling and design of a boosted uniflow scavenged direct injection gasoline (busdig) engine” (2015), SAE Technical Paper. https://doi.org/10.4271/2015-01-1970
  29. Wróblewski, E., Finke, S. and Babiak, M., "Investigation of friction loss in internal combustion engine of experimental microgeometry piston bearing surface", Journal of KONES, Vol. 24, (2017). https://doi.org/10.5604/01.3001.0010.2951
  30. Liu, J., Liu, Y. and Bolton, J.S., “The application of acoustic radiation modes to engine oil pan design” SAE Technical Paper, (2017), https://doi.org/10.4271/2017-01-1844
  31. Gamma Inc. Users Maunual, volume 61. Gamma Technologies, 2004. https://www.gtisoft.com/
  32. White, F.M., Fluid mechanics, WCB. Ed McGraw-Hill Boston; 1999. https://books.google.com/books?id=fa_pAAAAMAAJ
  33. Sonntag RE, Borgnakke C, Van Wylen GJ, Van Wyk S. Fundamentals of thermodynamics. New York: Wiley; 1998. https://books.google.com/books?id=95hVAAAAMAAJ
  34. Nikuradse J. “Laws of flow in rough pipes”, Washington: National Advisory Committee for Aeronautics; 1950 Nov 1. https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.467.2980&rep=rep1&type=pdf
  35. Heywood JB. Internal Combustion Engine Fundamentals. 1st Edition, McGraw-Hill, 1988. https://books.google.com/books?id=O69nQgAACAAJ
  36. Woschni, G., “A universally applicable equation for the instantaneous heat transfer coefficient in the internal combustion engine” (1967), SAE Technical Paper, https://doi.org/10.4271/670931
  37. Asgari, O., Hannani, S.K. and Ebrahimi, R., "Improvement and experimental validation of a multi-zone model for combustion and no emissions in cng fueled spark ignition engine", Journal of Mechanical Science and Technology, Vol. 26, No. 4, (2012), 1205-1212. https://doi.org/10.1007/s12206-012-0229-6
  38. Gharloghy J, Kakaee A, Forooghifar A. Comparison of EF7 TC engine performance in two modes of CNG and petrol using piston and combustion chamber thermal simulation. Fuel and Combustion, (2011), Vol. 3, No. 2, 1-16. https://www.sid.ir/en/journal/ViewPaper.aspx?ID=197151