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Experimental study of combustion and emission characteristics of ethanol fuelled port injected homogeneous charge compression ignition (HCCI) combustion engine

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  • Maurya, Rakesh Kumar
  • Agarwal, Avinash Kumar

Abstract

The homogeneous charge compression ignition (HCCI) is an alternative combustion concept for in reciprocating engines. The HCCI combustion engine offers significant benefits in terms of its high efficiency and ultra low emissions. In this investigation, port injection technique is used for preparing homogeneous charge. The combustion and emission characteristics of a HCCI engine fuelled with ethanol were investigated on a modified two-cylinder, four-stroke engine. The experiment is conducted with varying intake air temperature (120-150 °C) and at different air-fuel ratios, for which stable HCCI combustion is achieved. In-cylinder pressure, heat release analysis and exhaust emission measurements were employed for combustion diagnostics. In this study, effect of intake air temperature on combustion parameters, thermal efficiency, combustion efficiency and emissions in HCCI combustion engine is analyzed and discussed in detail. The experimental results indicate that the air-fuel ratio and intake air temperature have significant effect on the maximum in-cylinder pressure and its position, gas exchange efficiency, thermal efficiency, combustion efficiency, maximum rate of pressure rise and the heat release rate. Results show that for all stable operation points, NOx emissions are lower than 10 ppm however HC and CO emissions are higher.

Suggested Citation

  • Maurya, Rakesh Kumar & Agarwal, Avinash Kumar, 2011. "Experimental study of combustion and emission characteristics of ethanol fuelled port injected homogeneous charge compression ignition (HCCI) combustion engine," Applied Energy, Elsevier, vol. 88(4), pages 1169-1180, April.
    • Handle: RePEc:eee:appene:v:88:y:2011:i:4:p:1169-1180
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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.
    2. Machrafi, Hatim & Cavadias, Simeon & Amouroux, Jacques, 2008. "A parametric study on the emissions from an HCCI alternative combustion engine resulting from the auto-ignition of primary reference fuels," Applied Energy, Elsevier, vol. 85(8), pages 755-764, August.
    3. Komninos, N.P., 2009. "Investigating the importance of mass transfer on the formation of HCCI engine emissions using a multi-zone model," Applied Energy, Elsevier, vol. 86(7-8), pages 1335-1343, July.
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