Particulate Matter Emissions from a Direct Injection Spark Ignition Engine under Cold Fast Idle Conditions for Ethanol-Gasoline Blends
Name
SAE11-01-1305 sidi pm.pdf
Description
Main article
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2.06 MB
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Author(s)
Dimou, Iason
Kar, Kenneth
Cheng, Wai K.
Date Issued
April 2011
Journal
SAE International Journal of Engines
Publisher
SAE International
Citation
Dimou, Iason, Kenneth Kar, and Wai Cheng. “Particulate Matter Emissions from a Direct Injection Spark Ignition Engine Under Cold Fast Idle Conditions for Ethanol-Gasoline Blends.” SAE International Journal of Engines 4(1):1738-1746, 2011.
Version
Author's final manuscript
Abstract
The engine out particular matter number (PN) distributions at engine coolant temperature (ECT) of 0° C to 40° C for ethanol/ gasoline blends (E0 to E85) have been measured for a direct-injection spark ignition engine under cold fast idle condition. For E10 to E85, PN increases modestly when the ECT is lowered. The distributions, however, are insensitive to the ethanol content of the fuel. The PN for E0 is substantially higher than the gasohol fuels at ECT below 20° C. The total PN values (obtained from integrating the PN distribution from 15 to 350 run) are approximately the same for all fuels (E0 to E85) when ECT is above 20° C. When ECT is decreased below 20° C, the total PN values for E10 to E85 increase modestly, and they are insensitive to the ethanol content. For E0, however, the total PN increases substantially. This sharp change in PN from E0 to E10 is confirmed by running the tests with E2.5 and E5. The midpoint of the transition occurs at approximately E5. Because the fuel evaporative property does not change substantially from E0 to E10, the significant change in PN is attributed to the particulate matter formation chemistry.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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DOI of Published Version
https://doi.org/10.4271/2011-01-1305
