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Fuel efficiency and exhaust characteristics of turbocharged diesel engine equipped with an electric supercharger

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  • Baek, Seungju
  • Lee, Hyeonjik
  • Lee, Kihyung

Abstract

The electric supercharger, which is an important device of the 48 V hybrid system, is known to increase the low-speed efficiency and torque of the internal combustion engine. However, there is a lack of research on exhaust emissions, which are becoming more stringent owing to the use of the electric supercharger. Therefore, this study conducted basic experiments and analysis on the power, fuel efficiency, and exhaust emissions according to the change of engine control parameters during operation of the electric supercharger. The maximum indicated mean effective pressure (IMEP) increase was 52.9% at 1250 rpm. However, friction mean effective pressure (FMEP) and pumping mean effective pressure (PMEP), associated with a loss of engine efficiency, increased under various operating conditions. Brake specific fuel consumption (BSFC) improved by up to 8.8%, and brake specific carbon dioxide (BSCO2) decreased accordingly. Brake specific particulate matter (BSPM) and brake specific oxides of nitrogen (BSNOx) fluctuated significantly with the adjustment of the parameters for engine control. These were partially reduced compared to the conventional engines according to the experimental conditions. Therefore, even if an electric supercharger is applied to a diesel vehicle equipped with exhaust reduction devices, emission regulations can be satisfied.

Suggested Citation

  • 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).
    • Handle: RePEc:eee:energy:v:214:y:2021:i:c:s0360544220321563
    DOI: 10.1016/j.energy.2020.119049
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    References listed on IDEAS

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    1. Baek, Seungju & Woo, Seungchul & Kim, Youngkun & Lee, Kihyung, 2019. "Prediction of turbocharged diesel engine performance equipped with an electric supercharger using 1D simulation," Energy, Elsevier, vol. 185(C), pages 213-228.
    2. Lei, Y. & Zhou, D.S. & Zhang, H.G., 2010. "Investigation on performance of a compression-ignition engine with pressure-wave supercharger," Energy, Elsevier, vol. 35(1), pages 85-93.
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    Cited by:

    1. Ma, Zetai & Xie, Wenping & Xiang, Hanchun & Zhang, Kun & Yang, Mingyang & Deng, Kangyao, 2023. "Thermodynamic analysis of power recovery of marine diesel engine under high exhaust backpressure by additional electrically driven compressor," Energy, Elsevier, vol. 266(C).
    2. Baek, Seungju & Lee, Sanguk & Shin, Myunghwan & Lee, Jongtae & Lee, Kihyung, 2022. "Analysis of combustion and exhaust characteristics according to changes in the propane content of LPG," Energy, Elsevier, vol. 239(PC).
    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).

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