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Diesel/CNG Mixture Autoignition Control Using Fuel Composition and Injection Gap

Author

Listed:
  • Firmansyah

    (Centre for Automotive Research and Electric Mobility, Universiti Teknologi Petronas, Bota 32610, Perak, Malaysia)

  • A. Rashid A. Aziz

    (Centre for Automotive Research and Electric Mobility, Universiti Teknologi Petronas, Bota 32610, Perak, Malaysia
    These authors contributed equally to this work.)

  • Morgan Raymond Heikal

    (Centre for Automotive Research and Electric Mobility, Universiti Teknologi Petronas, Bota 32610, Perak, Malaysia
    These authors contributed equally to this work.)

  • Ezrann Z. Zainal A.

    (Centre for Automotive Research and Electric Mobility, Universiti Teknologi Petronas, Bota 32610, Perak, Malaysia
    These authors contributed equally to this work.)

Abstract

Combustion phasing is the main obstacle to the development of controlled auto-ignition based (CAI) engines to achieve low emissions and low fuel consumption operation. Fuel combinations with substantial differences in reactivity, such as diesel/compressed natural gas (CNG), show desirable combustion outputs and demonstrate great possibility in controlling the combustion. This paper discusses a control method for diesel/CNG mixture combustion with a variation of fuel composition and fuel stratification levels. The experiments were carried out in a constant volume combustion chamber with both fuels directly injected into the chamber. The mixture composition was varied from 0 to 100% CNG/diesel at lambda 1 while the fuel stratification level was controlled by the injection phasing between the two fuels, with gaps between injections ranging from 0 to 20 ms. The results demonstrated the suppressing effect of CNG on the diesel combustion, especially at the early combustion stages. However, CNG significantly enhanced the combustion performance of the diesel in the later stages. Injection gaps, on the other hand, showed particular behavior depending on mixture composition. Injection gaps show less effect on combustion phasing but a significant effect on the combustion output for higher diesel percentage (≥70%), while it is contradictive for lower diesel percentage (<70%).

Suggested Citation

  • Firmansyah & A. Rashid A. Aziz & Morgan Raymond Heikal & Ezrann Z. Zainal A., 2017. "Diesel/CNG Mixture Autoignition Control Using Fuel Composition and Injection Gap," Energies, MDPI, vol. 10(10), pages 1-12, October.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:10:p:1639-:d:115459
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    References listed on IDEAS

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    1. Sergejus Lebedevas & Laurencas Raslavičius & Martynas Drazdauskas, 2023. "Comprehensive Correlation for the Prediction of the Heat Release Characteristics of Diesel/CNG Mixtures in a Single-Zone Combustion Model," Sustainability, MDPI, vol. 15(4), pages 1-21, February.

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