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Analysis of the Influence of Diesel Spray Injection on the Ignition and Soot Formation in Multiple Injection Strategy

Author

Listed:
  • Raul Payri

    (CMT—Motores Térmicos, Universitat Politècnica de València, Edificio 6D, 46022 Valencia, Spain)

  • José M. García-Oliver

    (CMT—Motores Térmicos, Universitat Politècnica de València, Edificio 6D, 46022 Valencia, Spain)

  • Victor Mendoza

    (CMT—Motores Térmicos, Universitat Politècnica de València, Edificio 6D, 46022 Valencia, Spain)

  • Alberto Viera

    (AVL Ibérica SA, Edificio El Rengle Núcleo D, 08302 Mataró, Barcelona, Spain)

Abstract

Multiple injection strategies have increased their capabilities along with the evolution of injection system technologies up to the point that nowadays it is possible to inject eight different pulses, permitting to improve the engine performance, and consequently, emissions. The present work was realized for two simplified strategies: a pilot-main and a main-post, in order to analyze the influence of an auxiliary pulse on the main and otherwise, in reactive conditions for two pilot/post quantities and four hydraulic dwell times. The study was carried out by employing two optical techniques: diffused back-illumination with flame bandpass chemiluminescence for measuring soot, represented by soot-maps distribution, and single-pass schlieren for ignition delay (ID). Furthermore, a novel methodology for decoupling the start of combustion (SOC) of the second pulse was developed and successfully validated. From the ignition delay results, it was found for all test points that the pilot injection enhanced conditions, which promote a faster ignition of the main pulse, also at higher chamber temperatures, all conditions presented a separate combustion event for each injection. In emission terms, soot increased in the pilot-main strategies compared to its single injection case, as well as, in conditions that promote faster-premixed combustion.

Suggested Citation

  • Raul Payri & José M. García-Oliver & Victor Mendoza & Alberto Viera, 2020. "Analysis of the Influence of Diesel Spray Injection on the Ignition and Soot Formation in Multiple Injection Strategy," Energies, MDPI, vol. 13(13), pages 1-22, July.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:13:p:3505-:d:381586
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    References listed on IDEAS

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    1. Han, Sangwook & Kim, Jaeheun & Bae, Choongsik, 2014. "Effect of air–fuel mixing quality on characteristics of conventional and low temperature diesel combustion," Applied Energy, Elsevier, vol. 119(C), pages 454-466.
    2. Andrey Kozlov & Vadim Grinev & Alexey Terenchenko & Gennady Kornilov, 2019. "An Investigation of the Effect of Fuel Supply Parameters on Combustion Process of the Heavy-Duty Dual-Fuel Diesel Ignited Gas Engine," Energies, MDPI, vol. 12(12), pages 1-20, June.
    3. Payri, Raúl & Salvador, F.J. & Manin, Julien & Viera, Alberto, 2016. "Diesel ignition delay and lift-off length through different methodologies using a multi-hole injector," Applied Energy, Elsevier, vol. 162(C), pages 541-550.
    4. Gang Wu & Xinyi Zhou & Tie Li, 2019. "Temporal Evolution of Split-Injected Fuel Spray at Elevated Chamber Pressures," Energies, MDPI, vol. 12(22), pages 1-23, November.
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    Cited by:

    1. Simón Martínez-Martínez & Oscar A. de la Garza & Miguel García-Yera & Ricardo Martínez-Carrillo & Fausto A. Sánchez-Cruz, 2021. "Hydraulic Interactions between Injection Events Using Multiple Injection Strategies and a Solenoid Diesel Injector," Energies, MDPI, vol. 14(11), pages 1-11, May.
    2. Krystian Czernek & Michał Hyrycz & Andżelika Krupińska & Magdalena Matuszak & Marek Ochowiak & Stanisław Witczak & Sylwia Włodarczak, 2021. "State-of-the-Art Review of Effervescent-Swirl Atomizers," Energies, MDPI, vol. 14(10), pages 1-30, May.

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