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

Ping Sun, Ze Liu, Wei Dong and Song Yang
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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

Energies, 2019, vol. 12, issue 9, 1-18

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.

Keywords: ethanol/gasoline; dual-fuel engine; combined injection; particle number emissions (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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