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Comparative Study on the Effects of Ethanol Proportion on the Particle Numbers Emissions in a Combined Injection Engine

Author

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  • Ping Sun

    (State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China)

  • Ze Liu

    (State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China)

  • Wei Dong

    (State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China)

  • Song Yang

    (Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada)

Abstract

Ethanol has significant potential for the reduction of fuel consumption and the emissions of engines. In this paper, a dual-fuel combined engine test rig with ethanol injected in the intake port and gasoline injected directly into the cylinder are developed and the effects of ethanol/gasoline ratio ( R e ) on the combustion and emission of particle numbers are investigated experimentally. The results indicate that the peak in-cylinder temperature ( T max ) decreases continuously with the increase of the ethanol/gasoline ratio ( R e ). For particle emissions, ethanol can significantly reduce the accumulation mode particle number (APN) at low engine speed; and the lowest number of particulates are at G25 (the gasoline ratio is 25% of the fuel) at low load. And at high engine load, the total particle number (TPN) is insensitive to speed with large ethanol fraction and TPN is relatively small. With the decrease of R e ( R e < 50%), TPN rises sharply. When the direct injection timing advances, TPN reduces continuously and the effects caused by speed can be neglected. On the contrary, the speed has significant effects on particle emissions at various ignition times. At low speed, increasing ignition advance can cause the increase of the TPN; which is contrary to the effects of particle emissions at medium engine speed. And the effect of ignition timing at high speed on particle number is not obvious. The ignition timing for which the lowest TPN is reached will increase with the direct injection timing advances.

Suggested Citation

  • Ping Sun & Ze Liu & Wei Dong & Song Yang, 2019. "Comparative Study on the Effects of Ethanol Proportion on the Particle Numbers Emissions in a Combined Injection Engine," Energies, MDPI, vol. 12(9), pages 1-18, May.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:9:p:1788-:d:230173
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    References listed on IDEAS

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    1. Huang, Yuhan & Hong, Guang & Huang, Ronghua, 2016. "Effect of injection timing on mixture formation and combustion in an ethanol direct injection plus gasoline port injection (EDI+GPI) engine," Energy, Elsevier, vol. 111(C), pages 92-103.
    2. Huang, Yuhan & Hong, Guang & Huang, Ronghua, 2015. "Investigation to charge cooling effect and combustion characteristics of ethanol direct injection in a gasoline port injection engine," Applied Energy, Elsevier, vol. 160(C), pages 244-254.
    3. He, Fengshuo & Li, Shuo & Yu, Xiumin & Du, Yaodong & Zuo, Xiongyinan & Dong, Wei & Sun, Ping & He, Ling, 2018. "Comparison study and synthetic evaluation of combined injection in a spark ignition engine with hydrogen-blended at lean burn condition," Energy, Elsevier, vol. 157(C), pages 1053-1062.
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    Cited by:

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