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Miller cycle application to improve lean burn gas engine performance

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  • Tavakoli, Sady
  • Jazayeri, S. Ali
  • Fathi, Morteza
  • Jahanian, Omid

Abstract

Miller cycle is applied to improve performance and emission characteristics of a gas engine. There are different types of Miller cycle concept utilization through variation of valve timing either by early intake valve closure or late intake valve closure. In this study finite-volume method is used to analyse the performance and emission characteristics of a four-stroke 12-cylinder turbocharged Miller cycle gas engine. Therefore, experimental data are used to calibrate the results derived from 3D combustion simulation and 1D overall engine simulation. The Miller cycle application shows that about 30 CAD (crank angle degrees) advancement of IVC compared with standard cycle reduces emissions such as NOx to half its magnitude. However, a little reduction in power output seems inevitable. Also, compression ratio reduction contributes to almost 15% decrease in maximum in–cylinder pressure. Moreover, retardation of IVC simultaneously improves performance and emission characteristics. However, no significant change of in–cylinder peak pressure and temperature is seen.

Suggested Citation

  • Tavakoli, Sady & Jazayeri, S. Ali & Fathi, Morteza & Jahanian, Omid, 2016. "Miller cycle application to improve lean burn gas engine performance," Energy, Elsevier, vol. 109(C), pages 190-200.
    • Handle: RePEc:eee:energy:v:109:y:2016:i:c:p:190-200
    DOI: 10.1016/j.energy.2016.04.102
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    References listed on IDEAS

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    1. Mikalsen, R. & Wang, Y.D. & Roskilly, A.P., 2009. "A comparison of Miller and Otto cycle natural gas engines for small scale CHP applications," Applied Energy, Elsevier, vol. 86(6), pages 922-927, June.
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    5. Gonca, Guven & Sahin, Bahri & Ust, Yasin, 2013. "Performance maps for an air-standard irreversible Dual–Miller cycle (DMC) with late inlet valve closing (LIVC) version," Energy, Elsevier, vol. 54(C), pages 285-290.
    6. Al-Sarkhi, A. & Jaber, J.O. & Probert, S.D., 2006. "Efficiency of a Miller engine," Applied Energy, Elsevier, vol. 83(4), pages 343-351, April.
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    Cited by:

    1. Shen, Kai & Xu, Zishun & Chen, Hong & Zhang, Zhendong, 2021. "Investigation on the EGR effect to further improve fuel economy and emissions effect of Miller cycle turbocharged engine," Energy, Elsevier, vol. 215(PB).
    2. Weichao Wang & Guiyong Wang & Zhengjiang Wang & Jilin Lei & Junwei Huang & Xuexuan Nie & Lizhong Shen, 2022. "Optimization of Miller Cycle, EGR, and VNT on Performance and NOx Emission of a Diesel Engine for Range Extender at High Altitude," Energies, MDPI, vol. 15(23), pages 1-20, November.
    3. Osorio, Julian D. & Rivera-Alvarez, Alejandro, 2018. "Efficiency enhancement of spark-ignition engines using a Continuous Variable Valve Timing system for load control," Energy, Elsevier, vol. 161(C), pages 649-662.
    4. Zhao, Jinxing, 2017. "Research and application of over-expansion cycle (Atkinson and Miller) engines – A review," Applied Energy, Elsevier, vol. 185(P1), pages 300-319.
    5. Gonca, Guven & Sahin, Bahri & Parlak, Adnan & Ayhan, Vezir & Cesur, Idris & Koksal, Sakip, 2017. "Investigation of the effects of the steam injection method (SIM) on the performance and emission formation of a turbocharged and Miller cycle diesel engine (MCDE)," Energy, Elsevier, vol. 119(C), pages 926-937.

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