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Effects of a Dual-Loop Exhaust Gas Recirculation System and Variable Nozzle Turbine Control on the Operating Parameters of an Automotive Diesel Engine

Author

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  • Giorgio Zamboni

    (Internal Combustion Engines Group (ICEG), Department of Mechanical, Energy, Management and Transportation Engineering (DIME), University of Genoa, via Montallegro 1, 16145 Genoa, Italy)

  • Simone Moggia

    (Internal Combustion Engines Group (ICEG), Department of Mechanical, Energy, Management and Transportation Engineering (DIME), University of Genoa, via Montallegro 1, 16145 Genoa, Italy)

  • Massimo Capobianco

    (Internal Combustion Engines Group (ICEG), Department of Mechanical, Energy, Management and Transportation Engineering (DIME), University of Genoa, via Montallegro 1, 16145 Genoa, Italy)

Abstract

Reduction of NO X emissions and fuel consumption are the main topics in engine development, forcing the adoption of complex techniques and components, whose interactions have to be clearly understood for proper and reliable operations and management of the whole system. The investigation presented in this paper aimed at the development of integrated control strategies of turbocharging, high pressure (HP) and low pressure (LP) exhaust gas recirculation (EGR) systems for better NO X emissions and fuel consumption, while analyzing their reciprocal influence and the resulting variations of engine quantities. The study was based on an extended experimental program in three part load engine operating conditions. In the paper a comparison of the behavior of the main engine sub-systems (intake and exhaust circuits, turbocharger turbine and compressor, HP and LP EGR loops) in a wide range of operating modes is presented and discussed, considering open and closed loop approaches for variable nozzle turbine (VNT) control, and showing how these affect engine performance and emissions. The potential of significant decrease in NO X emissions through the integration of HP and LP EGR was confirmed, while a proper VNT management allowed for improved fuel consumption level, if an open loop control scheme is followed. At higher engine speed and load, further actions have to be applied to compensate for observed soot emissions increase.

Suggested Citation

  • Giorgio Zamboni & Simone Moggia & Massimo Capobianco, 2017. "Effects of a Dual-Loop Exhaust Gas Recirculation System and Variable Nozzle Turbine Control on the Operating Parameters of an Automotive Diesel Engine," Energies, MDPI, vol. 10(1), pages 1-18, January.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:1:p:47-:d:86887
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    References listed on IDEAS

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    Cited by:

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    2. Dariusz Kozak & Paweł Mazuro & Andrzej Teodorczyk, 2021. "Numerical Simulation of Two-Stage Variable Geometry Turbine," Energies, MDPI, vol. 14(17), pages 1-34, August.
    3. Zhaojie Shen & Wenzheng Cui & Xiaodong Ju & Zhongchang Liu & Shaohua Wu & Jianguo Yang, 2017. "Numeric Investigation of Gas Distribution in the Intake Manifold and Intake Ports of a Multi-Cylinder Diesel Engine Refined for Exhaust Gas Stratification," Energies, MDPI, vol. 10(11), pages 1-13, November.
    4. Park, Sangjun & Cho, Jungkeun & Park, Jungsoo, 2019. "Numerical methodology on virtual model extension and system-level optimization of light-duty diesel vehicle with dual-loop exhaust gas recirculation," Applied Energy, Elsevier, vol. 242(C), pages 1422-1435.
    5. Zhaojie Shen & Wenzheng Cui & Xiaodong Ju & Zhongchang Liu & Shaohua Wu & Jianguo Yang, 2018. "Numerical Investigation on Effects of Assigned EGR Stratification on a Heavy Duty Diesel Engine with Two-Stage Fuel Injection," Energies, MDPI, vol. 11(3), pages 1-14, February.
    6. Stanisław W. Kruczyński & Piotr Orliński & Marcin Ślęzak, 2020. "NO x Reduction in Ag/Al 2 O 3 -SiO 2 Converters in the Exhaust of a Compression-Ignition Engine," Energies, MDPI, vol. 14(1), pages 1-15, December.
    7. Zhongbo Zhang & Lifu Li, 2018. "Investigation of In-Cylinder Steam Injection in a Turbocharged Diesel Engine for Waste Heat Recovery and NO x Emission Control," Energies, MDPI, vol. 11(4), pages 1-22, April.

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