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Combustion process investigations in an optically accessible DISI engine fuelled with n-butanol during part load operation

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  • Irimescu, A.
  • Marchitto, L.
  • Merola, S.S.
  • Tornatore, C.
  • Valentino, G.

Abstract

The effect of n-butanol on the combustion process in a DISI engine was investigated through in-cylinder pressure measurements and optical data. An optical engine was equipped with a commercial head and with high pressure wall guided injection system. 2000 rpm engine speed was chosen as representative for mid-road load automotive use. Two partially open throttle conditions were tested. All trials were performed at close to stoichiometric air–fuel ratio. Optical diagnostics based on UV–visible imaging and natural emission spectroscopy were applied to study the combustion process from spark ignition to exhaust valve opening. A custom post-detection procedure applied to digital imaging data allowed evaluating the flame area. Results were correlated with volume fraction burned obtained through thermodynamic analysis. UV–visible spectroscopy was applied to investigate formation and evolution of the main chemical compounds characterizing spark ignition and combustion processes. Pollutant measurements (HC, CO, NOx, opacity) at undiluted exhaust, for gasoline and butanol, were correlated with pressure data and in-cylinder optical results. Overall engine operation was found to be similar for both energy sources, with the alternative fuel providing a slight improvement in performance compared to gasoline, for both loads; a significant reduction of NOx and soot was also obtained for alcohol fuelling.

Suggested Citation

  • Irimescu, A. & Marchitto, L. & Merola, S.S. & Tornatore, C. & Valentino, G., 2015. "Combustion process investigations in an optically accessible DISI engine fuelled with n-butanol during part load operation," Renewable Energy, Elsevier, vol. 77(C), pages 363-376.
    • Handle: RePEc:eee:renene:v:77:y:2015:i:c:p:363-376
    DOI: 10.1016/j.renene.2014.12.029
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    2. Simona Silvia Merola & Adrian Irimescu & Silvana Di Iorio & Bianca Maria Vaglieco, 2017. "Effect of Fuel Injection Strategy on the Carbonaceous Structure Formation and Nanoparticle Emission in a DISI Engine Fuelled with Butanol," Energies, MDPI, vol. 10(7), pages 1-19, June.
    3. Liu, Zengbin & Zhen, Xudong & Tian, Zhi & Liu, Daming & Wang, Yang, 2024. "Study on the effect of injection strategy on the combustion and emission characteristics of direct injection spark ignition bio-butanol engine," Energy, Elsevier, vol. 289(C).
    4. Hergueta, C. & Tsolakis, A. & Herreros, J.M. & Bogarra, M. & Price, E. & Simmance, K. & York, A.P.E. & Thompsett, D., 2018. "Impact of bio-alcohol fuels combustion on particulate matter morphology from efficient gasoline direct injection engines," Applied Energy, Elsevier, vol. 230(C), pages 794-802.
    5. Santiago Martinez & Adrian Irimescu & Simona Silvia Merola & Pedro Lacava & Pedro Curto-Riso, 2017. "Flame Front Propagation in an Optical GDI Engine under Stoichiometric and Lean Burn Conditions," Energies, MDPI, vol. 10(9), pages 1-23, September.
    6. García, Antonio & Monsalve-Serrano, Javier & Martínez-Boggio, Santiago & Rückert Roso, Vinícius & Duarte Souza Alvarenga Santos, Nathália, 2020. "Potential of bio-ethanol in different advanced combustion modes for hybrid passenger vehicles," Renewable Energy, Elsevier, vol. 150(C), pages 58-77.
    7. Merola, Simona Silvia & Tornatore, Cinzia & Irimescu, Adrian & Marchitto, Luca & Valentino, Gerardo, 2016. "Optical diagnostics of early flame development in a DISI (direct injection spark ignition) engine fueled with n-butanol and gasoline," Energy, Elsevier, vol. 108(C), pages 50-62.
    8. Hua, Yang & Qian, Yejian & Meng, Shun, 2023. "PAH laser diagnostics and soot particle dynamics in gasoline co-flow flames doped with n-butanol," Energy, Elsevier, vol. 272(C).
    9. Gao, Jianbing & Tian, Guohong & Ma, Chaochen & Xing, Shikai & Jenner, Phil, 2021. "Performance explorations of a naturally aspirated opposed rotary piston engine fuelled with hydrogen under part load and stoichiometric conditions using a numerical simulation approach," Energy, Elsevier, vol. 222(C).

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