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Different Hydrous Ethanol-Gasoline Blends - FTIR Emissions of a Flex-Fuel Engine and Chemical Properties of the Fuels PETROBRAS/CENPES
- Format:
- Conference/Event
- Author/Creator:
- de Melo, de Melo, author.
- Conference Name:
- SAE Brasil 2011 Congress and Exhibit (2011-10-04 : Sao Paulo, Brazil)
- Language:
- English
- Physical Description:
- 1 online resource
- Place of Publication:
- Warrendale, PA SAE International 2011
- Summary:
- In Brazilian market, Flex-Fuel vehicles represented over 85% ofnew light-duty vehicles sold in 2010. These vehicles can usegasoline blended with anhydrous ethanol (18 to 25% v/v), 100% ofhydrous ethanol (contains from 6,2 to 7,4% w/w of water) or anyblend of these fuels.Some studies regarding Flex-Fuel technology are being made inBrazil, but there are not many published information about fuelproperties of different ethanol-gasoline blends. Also, it isimportant to better understand emissions of aldehydes, unburnedethanol and total hydrocarbons of different ethanol blends ongasoline.A Flex-Fuel engine, 1.4 l, 4 cylinders was tested on adynamometer. A FTIR (Fourier Transform Infrared analyzer) benchmeasured aldehydes, unburned ethanol and total hydrocarbons. It wasused Gasoline with 25% of anhydrous ethanol was used as a referencefuel (E25). E25 was blended with different hydrous ethanol contentssuch as 30% (H30), 50% (H50), 80% (H80) and 100% (H100). To controlthe engine operation, a programmable ECU (Engine Control Unit) wasused, allowing spark timing calibration either for maximum breaktorque (MBT) or to keep the engine below the knocking limit.Operating conditions included partial load with stoichiometricair-fuel ratio, for three different engine speed conditions. Testresults were handled by the STATISTICA® software that calculated a95% confidence interval for each operating condition. The mainphysical properties of the different blends were analyzed as partof this work, including H/C and O/C molar ratio, net heating valueand others.The emissions results presented a reduction trend for CO, NMHCand NOx, a trend of increase of aldehydes and unburned ethanol andno significant changes for CO2
- Notes:
- Vendor supplied data
- Publisher Number:
- 2011-36-0080
- Access Restriction:
- Restricted for use by site license
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