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Determination of cycle number for real in-cylinder pressure cycle analysis in internal combustion engines

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  • Ceviz, M. Akif
  • Çavuşoğlu, Bülent
  • Kaya, Ferhat
  • Öner, İ. Volkan

Abstract

The in-cylinder pressure of internal combustion engines is one of the most important measurable parameter for analyzing the factors affecting performance characteristics of the engine. In many studies, in-cylinder pressure data are averaged over certain number of cycles at each crank angle in order to observe the effects of the parameters. If the number of cycles included is low, then the results may be misleading due to cyclic variations of in-cylinder pressure. The desired level of accuracy can only be obtained if the number of cycles is increased with increasing cyclic variations. The number of cycles used by researchers varies in the literature even for the same subject of study such as research and development, cyclic variations, cycle simulation, etc. There is no general agreement about how many cycle should be taken to obtain the average cycle to remove the effects of cyclic variations. The purpose of this study is therefore to determine the sufficient minimum cycle number at various engine operating conditions on a spark ignition engine by using statistical Levene’s test. The results showed that 50 cycles are enough to do accurate calculation of the average pressure cycle at various operation conditions of the engine.

Suggested Citation

  • Ceviz, M. Akif & Çavuşoğlu, Bülent & Kaya, Ferhat & Öner, İ. Volkan, 2011. "Determination of cycle number for real in-cylinder pressure cycle analysis in internal combustion engines," Energy, Elsevier, vol. 36(5), pages 2465-2472.
    • Handle: RePEc:eee:energy:v:36:y:2011:i:5:p:2465-2472
    DOI: 10.1016/j.energy.2011.01.038
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    References listed on IDEAS

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    1. Ceviz, M.A. & Yüksel, F., 2006. "Cyclic variations on LPG and gasoline-fuelled lean burn SI engine," Renewable Energy, Elsevier, vol. 31(12), pages 1950-1960.
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    Cited by:

    1. Wang, Xin & Zhang, Hongguang & Yao, Baofeng & Lei, Yan & Sun, Xiaona & Wang, Daojing & Ge, Yunshan, 2012. "Experimental study on factors affecting lean combustion limit of S.I engine fueled with compressed natural gas and hydrogen blends," Energy, Elsevier, vol. 38(1), pages 58-65.
    2. Peng, Wanxi & Liu, Zhenling & Motahari-Nezhad, Mohsen & Banisaeed, Mohammad & Shahraki, Saeid & Beheshti, Mehdi, 2016. "A detailed study of oxy-fuel combustion of biomass in a circulating fluidized bed (CFB) combustor: Evaluation of catalytic performance of metal nanoparticles (Al, Ni) for combustion efficiency improve," Energy, Elsevier, vol. 109(C), pages 1139-1147.
    3. Wang, Xin & Ge, Yunshan & Yu, Linxiao & Feng, Xiangyu, 2013. "Effects of altitude on the thermal efficiency of a heavy-duty diesel engine," Energy, Elsevier, vol. 59(C), pages 543-548.
    4. Urban Žvar Baškovič & Rok Vihar & Igor Mele & Tomaž Katrašnik, 2017. "A New Method for Simultaneous Determination of the TDC Offset and the Pressure Offset in Fired Cylinders of an Internal Combustion Engine," Energies, MDPI, vol. 10(1), pages 1-22, January.
    5. Zhao, Zhenfeng & Wu, Dan & Zhang, Zhenyu & Zhang, Fujun & Zhao, Changlu, 2014. "Experimental investigation of the cycle-to-cycle variations in combustion process of a hydraulic free-piston engine," Energy, Elsevier, vol. 78(C), pages 257-265.

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