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Effects of engine operating conditions on particle emissions of lean-burn gasoline direct-injection engine

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  • Park, Cheolwoong
  • Lee, Sunyoup
  • Yi, Uihyung

Abstract

Direct injection of fuel into the cylinder of an engine leads to the problem of particulate matter (PM) emissions. Lean-burn gasoline direct-injection (GDI) engines are known to emit higher levels of ultrafine particles than do conventional engines. The level of PM emissions by lean-burn GDI engines is unlikely to meet the EURO-VI emissions standards. In this study, the effects of combustion strategy and excess air ratio on the PM concentrations and particle size distribution were evaluated for a naturally aspirated lean-burn GDI engine. The engine operating conditions—including the fuel-air mixture and load—were varied in order to analyze the PM formation and the particle size distribution. The PM concentration was found to increase dramatically at an excess air ratio of 1.5, at which ratio lean combustion with a stratified mixture occurred. This was regarded as being the transition region between the premixed flames and the stratified mixture flames. Further, an increase in the excess air ratio to beyond 2.0 caused the PM concentration and particle number to increase again, possibly as a result of the relatively high ambient pressure and lower combustion temperature.

Suggested Citation

  • Park, Cheolwoong & Lee, Sunyoup & Yi, Uihyung, 2016. "Effects of engine operating conditions on particle emissions of lean-burn gasoline direct-injection engine," Energy, Elsevier, vol. 115(P1), pages 1148-1155.
    • Handle: RePEc:eee:energy:v:115:y:2016:i:p1:p:1148-1155
    DOI: 10.1016/j.energy.2016.09.051
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    References listed on IDEAS

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    1. Mohan, Balaji & Yang, Wenming & Chou, Siaw kiang, 2013. "Fuel injection strategies for performance improvement and emissions reduction in compression ignition engines—A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 28(C), pages 664-676.
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    1. Su, Yu-Hsuan & Kuo, Ting-Fu, 2019. "CFD-assisted analysis of the characteristics of stratified-charge combustion inside a wall-guided gasoline direct injection engine," Energy, Elsevier, vol. 175(C), pages 151-164.
    2. Kim, Keunsoo & Kim, Junghwan & Oh, Seungmook & Kim, Changup & Lee, Yonggyu, 2017. "Evaluation of injection and ignition schemes for the ultra-lean combustion direct-injection LPG engine to control particulate emissions," Applied Energy, Elsevier, vol. 194(C), pages 123-135.
    3. Qian, Yong & Li, Zilong & Yu, Liang & Wang, Xiaole & Lu, Xingcai, 2019. "Review of the state-of-the-art of particulate matter emissions from modern gasoline fueled engines," Applied Energy, Elsevier, vol. 238(C), pages 1269-1298.
    4. Kim, Taehoon & Moon, Junghwan & Jeon, Joonho, 2023. "Characterization of in-cylinder spatiotemporal flame and solid particle emissions for ethanol-gasoline blended in gasoline direct injection engines," Energy, Elsevier, vol. 283(C).
    5. Santiago Martinez & Adrian Irimescu & Simona Silvia Merola & Pedro Lacava & Pedro Curto-Riso, 2017. "Flame Front Propagation in an Optical GDI Engine under Stoichiometric and Lean Burn Conditions," Energies, MDPI, vol. 10(9), pages 1-23, September.
    6. Jiang, Chenxu & Li, Zilong & Qian, Yong & Wang, Xiaole & Zhang, Yahui & Lu, Xingcai, 2018. "Influences of fuel injection strategies on combustion performance and regular/irregular emissions in a turbocharged gasoline direct injection engine: Commercial gasoline versus multi-components gasoli," Energy, Elsevier, vol. 157(C), pages 173-187.
    7. Shi, Lei & Ji, Changwei & Wang, Shuofeng & Su, Teng & Cong, Xiaoyu & Wang, Du & Tang, Chuanqi, 2019. "Effects of second injection timing on combustion characteristics of the spark ignition direct injection gasoline engines with dimethyl ether enrichment in the intake port," Energy, Elsevier, vol. 180(C), pages 10-18.

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