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Ducted fuel injection: A new approach for lowering soot emissions from direct-injection engines

Author

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  • Mueller, Charles J.
  • Nilsen, Christopher W.
  • Ruth, Daniel J.
  • Gehmlich, Ryan K.
  • Pickett, Lyle M.
  • Skeen, Scott A.

Abstract

Designers of direct-injection compression-ignition engines use a variety of strategies to improve the fuel/charge-gas mixture within the combustion chamber for increased efficiency and reduced pollutant emissions. Strategies include the use of high fuel-injection pressures, multiple injections, small injector orifices, flow swirl, long-ignition-delay conditions, and oxygenated fuels. This is the first journal publication on a new mixing-enhancement strategy for emissions reduction: ducted fuel injection. The concept involves injecting fuel along the axis of a small cylindrical duct within the combustion chamber, to enhance the mixture in the autoignition zone relative to a conventional free-spray configuration (i.e., a fuel spray that is not surrounded by a duct). The results described herein, from initial proof-of-concept experiments conducted in a constant-volume combustion vessel, show dramatically lower soot incandescence from ducted fuel injection than from free sprays over a range of charge-gas conditions that are representative of those in modern direct-injection compression-ignition engines.

Suggested Citation

  • Mueller, Charles J. & Nilsen, Christopher W. & Ruth, Daniel J. & Gehmlich, Ryan K. & Pickett, Lyle M. & Skeen, Scott A., 2017. "Ducted fuel injection: A new approach for lowering soot emissions from direct-injection engines," Applied Energy, Elsevier, vol. 204(C), pages 206-220.
    • Handle: RePEc:eee:appene:v:204:y:2017:i:c:p:206-220
    DOI: 10.1016/j.apenergy.2017.07.001
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    Cited by:

    1. Shang, Weiwei & He, Zhixia & Wang, Qian & Cao, Jiawei & Li, Bei & Leng, Xianyin & Tamilselvan, P. & Li, Da, 2018. "Experimental and analytical study on capture spray liquid penetration and combustion characteristics simultaneously with Hydrogenated Catalytic Biodiesel/Diesel blended fuel," Applied Energy, Elsevier, vol. 226(C), pages 947-956.
    2. Wu, Shaohua & Zhou, Dezhi & Yang, Wenming, 2019. "Implementation of an efficient method of moments for treatment of soot formation and oxidation processes in three-dimensional engine simulations," Applied Energy, Elsevier, vol. 254(C).
    3. Wu, Shaohua & Lao, Chung Ting & Akroyd, Jethro & Mosbach, Sebastian & Yang, Wenming & Kraft, Markus, 2020. "A joint moment projection method and maximum entropy approach for simulation of soot formation and oxidation in diesel engines," Applied Energy, Elsevier, vol. 258(C).
    4. Zdzisław Bielecki & Marek Ochowiak & Sylwia Włodarczak & Andżelika Krupińska & Magdalena Matuszak & Robert Lewtak & Jarosław Dziuba & Ernest Szajna & Dariusz Choiński & Marcin Odziomek, 2021. "The Analysis of the Possibility of Feeding a Liquid Catalyst to a Coal Dust Channel," Energies, MDPI, vol. 14(24), pages 1-14, December.
    5. Marco Puglia & Nicolò Morselli & Simone Pedrazzi & Paolo Tartarini & Giulio Allesina & Alberto Muscio, 2021. "Specific and Cumulative Exhaust Gas Emissions in Micro-Scale Generators Fueled by Syngas from Biomass Gasification," Sustainability, MDPI, vol. 13(6), pages 1-13, March.
    6. Łukasz Rymaniak & Michalina Kamińska & Natalia Szymlet & Rafał Grzeszczyk, 2021. "Analysis of Harmful Exhaust Gas Concentrations in Cloud behind a Vehicle with a Spark Ignition Engine," Energies, MDPI, vol. 14(6), pages 1-16, March.
    7. Deqing Mei & Qisong Yu & Zhengjun Zhang & Shan Yue & Lizhi Tu, 2021. "Effects of Two Pilot Injection on Combustion and Emissions in a PCCI Diesel Engine," Energies, MDPI, vol. 14(6), pages 1-14, March.

    More about this item

    Keywords

    Soot; Duct; Diesel; Spray; Mixing; Combustion;
    All these keywords.

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