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Characteristics of cyclic heat release variability in the transition from spark ignition to HCCI in a gasoline engine

Author

Listed:
  • Sen, A.K.
  • Litak, G.
  • Edwards, K.D.
  • Finney, C.E.A.
  • Daw, C.S.
  • Wagner, R.M.

Abstract

We study selected examples of previously published cyclic heat-release measurements from a single-cylinder gasoline engine as stepwise valve timing adjustments were made to shift from spark ignited (SI) combustion to homogeneous charge compression ignition (HCCI). Wavelet analysis of the time series, combined with conventional statistics and multifractal analysis, revealed previously undocumented features in the combustion variability as the shift occurred. In the spark-ignition combustion mode, the heat-release variations were very small in amplitude and exhibited more persistent low-frequency oscillations with intermittent high-frequency bursts. In the HCCI combustion mode, the amplitude of the heat-release variations again was small and involved mainly low-frequency oscillations. At intermediate states between SI and HCCI, a wide range of very large-amplitude oscillations occurred, including both persistent low-frequency periodicities and intermittent high-frequency bursts. It appears from these results that real-time wavelet decomposition of engine cylinder pressure measurements may be useful for on-board tracking of SI-HCCI combustion regime shifts.

Suggested Citation

  • Sen, A.K. & Litak, G. & Edwards, K.D. & Finney, C.E.A. & Daw, C.S. & Wagner, R.M., 2011. "Characteristics of cyclic heat release variability in the transition from spark ignition to HCCI in a gasoline engine," Applied Energy, Elsevier, vol. 88(5), pages 1649-1655, May.
  • Handle: RePEc:eee:appene:v:88:y:2011:i:5:p:1649-1655
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    References listed on IDEAS

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    1. Hou, Junxing & Qiao, Xinqi & Wang, Zhen & Liu, Wei & Huang, Zhen, 2010. "Characterization of knocking combustion in HCCI DME engine using wavelet packet transform," Applied Energy, Elsevier, vol. 87(4), pages 1239-1246, April.
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    Cited by:

    1. Ortiz-Soto, Elliott A. & Lavoie, George A. & Martz, Jason B. & Wooldridge, Margaret S. & Assanis, Dennis N., 2014. "Enhanced heat release analysis for advanced multi-mode combustion engine experiments," Applied Energy, Elsevier, vol. 136(C), pages 465-479.
    2. Sen, Asok K. & Wang, Jinhua & Huang, Zuohua, 2011. "Investigating the effect of hydrogen addition on cyclic variability in a natural gas spark ignition engine: Wavelet multiresolution analysis," Applied Energy, Elsevier, vol. 88(12), pages 4860-4866.
    3. Xie, Hui & Li, Le & Chen, Tao & Yu, Weifei & Wang, Xinyan & Zhao, Hua, 2013. "Study on spark assisted compression ignition (SACI) combustion with positive valve overlap at medium–high load," Applied Energy, Elsevier, vol. 101(C), pages 622-633.

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