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Research on Fuel Efficiency and Emissions of Converted Diesel Engine with Conventional Fuel Injection System for Operation on Natural Gas

Author

Listed:
  • Sergejus Lebedevas

    (Department of Marine Engineering, Faculty of Marine Technologies and Natural Sciences, Klaipeda University, Bijunu Str. 17, LT-91225 Klaipeda, Lithuania)

  • Saugirdas Pukalskas

    (Department of Automobile Engineering, Transport Engineering Faculty, Vilnius Gediminas Technical University, J. Basanavičiaus Str. 28, LT-03224 Vilnius, Lithuania)

  • Vygintas Daukšys

    (Department of Marine Engineering, Faculty of Marine Technologies and Natural Sciences, Klaipeda University, Bijunu Str. 17, LT-91225 Klaipeda, Lithuania)

  • Alfredas Rimkus

    (Department of Automobile Engineering, Transport Engineering Faculty, Vilnius Gediminas Technical University, J. Basanavičiaus Str. 28, LT-03224 Vilnius, Lithuania)

  • Mindaugas Melaika

    (Department of Automobile Engineering, Transport Engineering Faculty, Vilnius Gediminas Technical University, J. Basanavičiaus Str. 28, LT-03224 Vilnius, Lithuania)

  • Linas Jonika

    (Department of Marine Engineering, Faculty of Marine Technologies and Natural Sciences, Klaipeda University, Bijunu Str. 17, LT-91225 Klaipeda, Lithuania)

Abstract

This paper presents a study on the energy efficiency and emissions of a converted high-revolution bore 79.5 mm/stroke 95 mm engine with a conventional fuel injection system for operation with dual fuel feed: diesel (D) and natural gas (NG). The part of NG energy increase in the dual fuel is related to a significant deterioration in energy efficiency ( η i ) , particularly when engine operation is in low load modes and was determined to be below 40% of maximum continuous rating. The effectiveness of the D injection timing optimisation was established in high engine load modes within the range of a co-combustion ratio of NG ≤ 0.4: with an increase in η i , compared to D, the emissions of NO x + HC decreased by 15% to 25%, while those of CO 2 decreased by 8% to16%; the six-fold CO emission increase, up to 6 g/kWh, was unregulated. By referencing the indicated process characteristics of the established NG phase elongation in the expansion stroke, the combustion time increase as well as the associated decrease in the cylinder excess air ratio (α) are possible reasons for the increase in the incomplete combustion product emission.

Suggested Citation

  • Sergejus Lebedevas & Saugirdas Pukalskas & Vygintas Daukšys & Alfredas Rimkus & Mindaugas Melaika & Linas Jonika, 2019. "Research on Fuel Efficiency and Emissions of Converted Diesel Engine with Conventional Fuel Injection System for Operation on Natural Gas," Energies, MDPI, vol. 12(12), pages 1-32, June.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:12:p:2413-:d:242344
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    References listed on IDEAS

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    2. Sergejus Lebedevas & Tomas Čepaitis, 2021. "Parametric Analysis of the Combustion Cycle of a Diesel Engine for Operation on Natural Gas," Sustainability, MDPI, vol. 13(5), pages 1-23, March.

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