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Assessment of air management strategies to improve the transient response of advanced gasoline engines operating under high EGR conditions

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  • Galindo, José
  • Climent, Héctor
  • de la Morena, Joaquín
  • González-Domínguez, David
  • Guilain, Stéphane

Abstract

Advanced gasoline engines may lead the medium-term future of the passenger vehicle market, working in conventional and hybrid powertrains. Downsizing with turbocharging is the most extended way to improve fuel economy in gasoline engines. It is also proven that exhaust gas recirculation (EGR) reduces fuel consumption, but extracting the maximum benefit from EGR requires operating with high EGR rates. This fact can compromise the transient engine operation due to the greater turbocharger dependence. This research evaluates the EGR influence on the transient response of a turbocharged gasoline engine and, mainly, the potential of three air management strategies to accelerate the said response. Tip-in maneuvers at 1500 rpm (6–12 bar BMEP) were tested and simulated to this end. The three strategies are: reducing the EGR dilution by closing the EGR valve simultaneously with the throttle opening, using a pressurized air tank (PAT), and installing an electric supercharger at the compressor outlet in series. Engine tests show that the torque response time with EGR is 2-s slower than without EGR. 1D modeling results reveal that: the PAT connected to the intake manifold provides the fastest response, and the electric supercharger guarantees an excellent tradeoff between fuel consumption and torque response.

Suggested Citation

  • Galindo, José & Climent, Héctor & de la Morena, Joaquín & González-Domínguez, David & Guilain, Stéphane, 2023. "Assessment of air management strategies to improve the transient response of advanced gasoline engines operating under high EGR conditions," Energy, Elsevier, vol. 262(PB).
    • Handle: RePEc:eee:energy:v:262:y:2023:i:pb:s0360544222024720
    DOI: 10.1016/j.energy.2022.125586
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    References listed on IDEAS

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    1. Zhao, Jinxing & Fu, Rui & Wang, Sen & Xu, Hongchang & Yuan, Zhiyuan, 2022. "Fuel economy improvement of a turbocharged gasoline SI engine through combining cooled EGR and high compression ratio," Energy, Elsevier, vol. 239(PE).
    2. García, Antonio & Monsalve-Serrano, Javier & Martínez-Boggio, Santiago & Wittek, Karsten, 2020. "Potential of hybrid powertrains in a variable compression ratio downsized turbocharged VVA Spark Ignition engine," Energy, Elsevier, vol. 195(C).
    3. Shen, Kai & Xu, Zishun & Zhu, Zhongpan & Yang, Linsen, 2022. "Combined effects of electric supercharger and LP-EGR on performance of turbocharged engine," Energy, Elsevier, vol. 244(PB).
    4. Norbert Zsiga & Christoph Voser & Christopher Onder & Lino Guzzella, 2013. "Intake Manifold Boosting of Turbocharged Spark-Ignited Engines," Energies, MDPI, vol. 6(3), pages 1-18, March.
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    Cited by:

    1. Wenyu Gu & Wanhua Su, 2023. "Study on the Effect of Exhaust Gas Recirculation Coupled Variable Geometry Turbocharger and Fuel Quantity Control on Transient Performance of Turbocharged Diesel Engine," Energies, MDPI, vol. 16(16), pages 1-20, August.

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