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Study on the Effect of Exhaust Gas Recirculation Coupled Variable Geometry Turbocharger and Fuel Quantity Control on Transient Performance of Turbocharged Diesel Engine

Author

Listed:
  • Wenyu Gu

    (State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China)

  • Wanhua Su

    (State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China)

Abstract

With increasingly stringent emissions regulations, there are growing demands for the transient performance of diesel engines. This study conducted a transient bench test on a two-stage turbocharged heavy-duty diesel engine to optimize its performance during a load increase (20% to 100% in 1 s) at a constant speed (1200 RPM) transient process. The results showed that the transient control scheme using the low-pressure EGR system resulted in a 42.1% reduction in the peak value of soot emission, a 24.8% decrease in the peak value of NOx emission, a 9.14% decrease in ISFC and a 30.6% increase in maximum IMEP achieved in 1 s, compared to the steady-state optimization control scheme without EGR. Transient control scheme using the high-pressure EGR system resulted in a 24.4% reduction in the peak value of soot emission, a 31.8% reduction in the peak value of NOx emission, a 9.52% reduction in ISFC, and a 31.7% increase in maximum IMEP achieved in 1 s. The comparison of high and low-pressure EGR systems revealed that the low-pressure EGR system produced lower compromising emissions, while alterations in control parameters for the diesel engine with a high-pressure EGR system had a more significant impact on the transient process performance.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:16:p:6008-:d:1218648
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    References listed on IDEAS

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    1. Luján, José Manuel & Guardiola, Carlos & Pla, Benjamín & Reig, Alberto, 2015. "Switching strategy between HP (high pressure)- and LPEGR (low pressure exhaust gas recirculation) systems for reduced fuel consumption and emissions," Energy, Elsevier, vol. 90(P2), pages 1790-1798.
    2. Cornolti, L. & Onorati, A. & Cerri, T. & Montenegro, G. & Piscaglia, F., 2013. "1D simulation of a turbocharged Diesel engine with comparison of short and long EGR route solutions," Applied Energy, Elsevier, vol. 111(C), pages 1-15.
    3. Erxi Liu & Wanhua Su, 2019. "Study on Effects of Common Rail Injector Drive Circuitry with Different Freewheeling Circuits on Control Performance and Cycle-by-Cycle Variations," Energies, MDPI, vol. 12(3), pages 1-18, February.
    4. 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).
    5. Park, Youngsoo & Bae, Choongsik, 2014. "Experimental study on the effects of high/low pressure EGR proportion in a passenger car diesel engine," Applied Energy, Elsevier, vol. 133(C), pages 308-316.
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