COMPARATIVE AUTOMOTIVE ENGINE OPERATION WHEN FUELED WITH ETHANOL AND METHANOL

An experimental investigation of Q spark ignition multicylinder engine operation on pure ethanol was undertaken to contrast the engine performance and exhaust emissions with indolene and pure methanol. Equivalence ratio (normalized F/A ratio) was chosen as the principal independent variable. Fuel economy, the regulated exhaust emissions (NO/sub x/, hydrocarbons, and CO) and exhaust aldehydes, and maldistribution were taken as dependent variables. Both steady state engine results and simulated driving cycle (the Federal Emission Test Procedure--FTP and the Highway Fuel Economy Test Procedure--HFETP) results are presented and discussed. The findings show, in general, that ethanol gives results in fuel economy on the basis of miles per millions BFU which lie between the results obtained using gasoline and methanol, i.e., better fuel economy than gasoline and poorer fuel economy than methanol. Exhaust emissions show mixed behavior. The oxides of nitrogen emission were found to be between the results obtained on gasoline and methanol, i.e., higher for gasoline and lower for methanol, but closer to the gasoline results. Carbon monoxide emissions from ethanol were found to be less than the indolene and methanol results, however, unburned fuel (hydrocarbons) emissions were higher from ethanol fuel in comparison to both methanol and indolene results. The maldistribution of the fuel-air mixture among the cylinders was found to be worse with ethanol when compared to gasoline, but it was better than the results obtained on methanol. (ERA citation 03:053075)

  • Corporate Authors:

    Department of Energy

    1000 Independence Avenue, SW
    Washington, DC  USA  20585

    Santa Clara University, California

    Santa Clara, CA  USA 

    University of Miami, Coral Gables

    Coral Gables, FL  USA  33124
  • Authors:
    • ECKLUND, E E
  • Publication Date: 1978-5

Media Info

  • Pagination: 59 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00186449
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Contract Numbers: EC-78-C-03-1737, EY-76-S-05-5216
  • Files: TRIS
  • Created Date: Feb 27 1979 12:00AM