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Low-Load Limit in a Diesel-Ignited Gas Engine

Author

Listed:
  • Richard Hutter

    (Institute for Dynamic Systems and Control, ETH Zurich, 8092 Zurich, Switzerland
    Current address: Sonneggstrasse 3, 8092 Zurich, Switzerland.)

  • Johannes Ritzmann

    (Institute for Dynamic Systems and Control, ETH Zurich, 8092 Zurich, Switzerland)

  • Philipp Elbert

    (Institute for Dynamic Systems and Control, ETH Zurich, 8092 Zurich, Switzerland)

  • Christopher Onder

    (Institute for Dynamic Systems and Control, ETH Zurich, 8092 Zurich, Switzerland)

Abstract

The lean-burn capability of the Diesel-ignited gas engine combined with its potential for high efficiency and low CO 2 emissions makes this engine concept one of the most promising alternative fuel converters for passenger cars. Instead of using a spark plug, the ignition relies on the compression-ignited Diesel fuel providing ignition centers for the homogeneous air-gas mixture. In this study the amount of Diesel is reduced to the minimum amount required for the desired ignition. The low-load operation of such an engine is known to be challenging, as hydrocarbon (HC) emissions rise. The objective of this study is to develop optimal low-load operation strategies for the input variables equivalence ratio and exhaust gas recirculation (EGR) rate. A physical engine model helps to investigate three important limitations, namely maximum acceptable HC emissions, minimal CO 2 reduction, and minimal exhaust gas temperature. An important finding is the fact that the high HC emissions under low-load and lean conditions are a consequence of the inability to raise the gas equivalence ratio resulting in a poor flame propagation. The simulations on the various low-load strategies reveal the conflicting demand of lean combustion with low CO 2 emissions and stoichiometric operation with low HC emissions, as well as the minimal feasible dual-fuel load of 3.2 bar brake mean effective pressure.

Suggested Citation

  • Richard Hutter & Johannes Ritzmann & Philipp Elbert & Christopher Onder, 2017. "Low-Load Limit in a Diesel-Ignited Gas Engine," Energies, MDPI, vol. 10(10), pages 1-27, September.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:10:p:1450-:d:112765
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    References listed on IDEAS

    as
    1. Florian Zurbriggen & Richard Hutter & Christopher Onder, 2016. "Diesel-Minimal Combustion Control of a Natural Gas-Diesel Engine," Energies, MDPI, vol. 9(1), pages 1-19, January.
    2. Tobias Ott & Christopher Onder & Lino Guzzella, 2013. "Hybrid-Electric Vehicle with Natural Gas-Diesel Engine," Energies, MDPI, vol. 6(7), pages 1-22, July.
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    Cited by:

    1. Yu-Hui Peng & Yu-Peng Huang & Jia-You Tang & Qi-Feng Huang & Yi-Ran Huang, 2018. "Experimental Study on the Effects of Air Supply Control on Combustion and Emissions Performance at Medium and Low Load for a Dual-Fuel Diesel Engine," Energies, MDPI, vol. 11(11), pages 1-14, October.
    2. Hua Zhou & Hong-Wei Zhao & Yu-Peng Huang & Jian-Hui Wei & Yu-Hui Peng, 2019. "Effects of Injection Timing on Combustion and Emission Performance of Dual-Fuel Diesel Engine under Low to Medium Load Conditions," Energies, MDPI, vol. 12(12), pages 1-14, June.
    3. Sogut, M. Ziya, 2024. "Entropy-based environmental analyses of marine fuel preferences for onboard ships," Energy, Elsevier, vol. 305(C).
    4. Elizabeth Lindstad & Gunnar S. Eskeland & Agathe Rialland & Anders Valland, 2020. "Decarbonizing Maritime Transport: The Importance of Engine Technology and Regulations for LNG to Serve as a Transition Fuel," Sustainability, MDPI, vol. 12(21), pages 1-21, October.

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