Emissions, fuel economy, and driveability effects of methanol/butanol/gasoline fuel blends
The immediate effects of methanol-gasoline blends on vehicle emissions, fuel economy, and driveability were investigated. The addition of a 2:1 mixture of methyl and butyl alcohols to gasoline, to provide a total alcohol concentration of either 10 percent or 18 percent, resulted in higher evaporative emissions, lower carbon monoxide emissions, lower volumetric fuel economy, and poorer driveability. Exhaust hydrocarbon and nitrogen oxide emissions decreased with some cars and increased with others. The closedloop fuel metering systems, with which some of the test cars were equipped, could not completely compensate for the leaning effect of the alcohols. Consequently, the results of this test program suggest that these alcohol-gasoline blends would not be satisfactory for use in many cars either with or without closed-loop systems.
- Research Organization:
- General Motors Research Laboratories Warren, MI
- OSTI ID:
- 6834658
- Journal Information:
- SAE Spec. Publ.; (United States), Journal Name: SAE Spec. Publ.; (United States) Vol. SP-527; ISSN SAESA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330100* -- Internal Combustion Engines
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ALCOHOL FUELS
ALCOHOLS
AUTOMOBILES
BUTANOLS
CHALCOGENIDES
DISPERSIONS
ENGINES
EXHAUST GASES
FLUIDS
FUEL ECONOMY
FUEL SUBSTITUTION
FUELS
GASEOUS WASTES
GASES
GASOLINE
HEAT ENGINES
HYDROCARBONS
HYDROXY COMPOUNDS
INTERNAL COMBUSTION ENGINES
LIQUID FUELS
METHANOL FUELS
MIXTURES
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
PERFORMANCE TESTING
PETROLEUM PRODUCTS
QUANTITY RATIO
SYNTHETIC FUELS
TESTING
VEHICLES
WASTES