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Hybrid EGR and turbocharging systems control for low NOX and fuel consumption in an automotive diesel engine

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  • Zamboni, Giorgio
  • Moggia, Simone
  • Capobianco, Massimo

Abstract

An experimental investigation was made on a downsized Euro 5 turbocharged diesel engine managing high/low pressure EGR systems and the variable nozzle turbine, aiming at major reductions in NOX emissions while enhancing fuel consumption in comparison with reference configuration. Three part load engine operating conditions were chosen at low and medium speed levels, applying different strategies to a number of control variables (relative air–fuel ratio, VNT opening degree/intake pressure, valves position in low pressure EGR circuit), thus exploring the whole range of high/low pressure EGR proportion. In suitable operating modes of tested conditions, NOX emissions were reduced up to 58–66%. Brake specific fuel consumption decreased around 5–9.5% at low speed/load, 1.7–3.3% in the intermediate condition while no advantages were achieved in the third working point. The activation of low pressure loop confirmed to be beneficial for turbocharger performance, rising its rotational speed thus granting for a better transient response, while increase in soot emissions ranged in a wide interval. For each condition, optimal operating modes were identified, with the relevant EGR proportion. A prevailing contribution from the long route circuit was generally requested, up to the exclusion of short route loop at higher level of speed and load.

Suggested Citation

  • Zamboni, Giorgio & Moggia, Simone & Capobianco, Massimo, 2016. "Hybrid EGR and turbocharging systems control for low NOX and fuel consumption in an automotive diesel engine," Applied Energy, Elsevier, vol. 165(C), pages 839-848.
    • Handle: RePEc:eee:appene:v:165:y:2016:i:c:p:839-848
    DOI: 10.1016/j.apenergy.2015.12.117
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    3. Reihani, Amin & Hoard, John & Klinkert, Stefan & Kuan, Chih-Kuang & Styles, Daniel & McConville, Greg, 2020. "Experimental response surface study of the effects of low-pressure exhaust gas recirculation mixing on turbocharger compressor performance," Applied Energy, Elsevier, vol. 261(C).
    4. Park, Jungsoo & Choi, Jungwook, 2016. "Optimization of dual-loop exhaust gas recirculation splitting for a light-duty diesel engine with model-based control," Applied Energy, Elsevier, vol. 181(C), pages 268-277.
    5. 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.
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    7. Rami Y. Dahham & Haiqiao Wei & Jiaying Pan, 2022. "Improving Thermal Efficiency of Internal Combustion Engines: Recent Progress and Remaining Challenges," Energies, MDPI, vol. 15(17), pages 1-60, August.
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    10. Baek, Seungju & Lee, Hyeonjik & Lee, Kihyung, 2021. "Fuel efficiency and exhaust characteristics of turbocharged diesel engine equipped with an electric supercharger," Energy, Elsevier, vol. 214(C).
    11. Sangram Kishore Nanda & Boru Jia & Andrew Smallbone & Anthony Paul Roskilly, 2017. "Fundamental Analysis of Thermal Overload in Diesel Engines: Hypothesis and Validation," Energies, MDPI, vol. 10(3), pages 1-12, March.
    12. Deng, Yuanwang & Liu, Huawei & Zhao, Xiaohuan & E, Jiaqiang & Chen, Jianmei, 2018. "Effects of cold start control strategy on cold start performance of the diesel engine based on a comprehensive preheat diesel engine model," Applied Energy, Elsevier, vol. 210(C), pages 279-287.
    13. Tsokolis, D. & Tsiakmakis, S. & Dimaratos, A. & Fontaras, G. & Pistikopoulos, P. & Ciuffo, B. & Samaras, Z., 2016. "Fuel consumption and CO2 emissions of passenger cars over the New Worldwide Harmonized Test Protocol," Applied Energy, Elsevier, vol. 179(C), pages 1152-1165.
    14. 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.
    15. Mohd Muqeem & Ahmad Faizan Sherwani & Mukhtar Ahmad & Zahid Akhtar Khan, 2018. "Optimization of diesel engine input parameters for reducing hydrocarbon emission and smoke opacity using Taguchi method and analysis of variance," Energy & Environment, , vol. 29(3), pages 410-431, May.
    16. Lu, Kai & Bai, Shuzhan & Zang, Zhicheng & Li, Guoxiang, 2023. "Study on urea deposits risk of after-treatment system based on deposits boundary method," Energy, Elsevier, vol. 267(C).
    17. Zhao, Jinxing, 2017. "Research and application of over-expansion cycle (Atkinson and Miller) engines – A review," Applied Energy, Elsevier, vol. 185(P1), pages 300-319.
    18. Jarosław Ziółkowski & Mateusz Oszczypała & Jerzy Małachowski & Joanna Szkutnik-Rogoż, 2021. "Use of Artificial Neural Networks to Predict Fuel Consumption on the Basis of Technical Parameters of Vehicles," Energies, MDPI, vol. 14(9), pages 1-23, May.
    19. Bahiuddin, Irfan & Mazlan, Saiful Amri & Imaduddin, Fitrian & Ubaidillah,, 2017. "A new control-oriented transient model of variable geometry turbocharger," Energy, Elsevier, vol. 125(C), pages 297-312.
    20. Ko, Jinyoung & Jin, Dongyoung & Jang, Wonwook & Myung, Cha-Lee & Kwon, Sangil & Park, Simsoo, 2017. "Comparative investigation of NOx emission characteristics from a Euro 6-compliant diesel passenger car over the NEDC and WLTC at various ambient temperatures," Applied Energy, Elsevier, vol. 187(C), pages 652-662.

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