Three-way conversion catalysts on vehicles fueled with ethanol-gasoline mixtures

Conference · Tue Jan 01 00:00:00 EST 1980 · SAE Prog. Technol.; (United States)

OSTI ID:6873044

Mooney, J J; Hansel, J G; Burns, K R

Three-way conversion catalysts systems which provide control of three emission components - hydrocarbons, carbon monoxide, and oxides of nitrogen - generally require the use of closed-loop feedback control of the air/fuel metering system to provide a near stoichiometric exhaust gas composition. As an alternate fuel such as ethyl-alcohol is added to gasoline, the stoichiometric air/fuel ratio is altered. Conventional air/fuel metering systems do not compensate for this change. The ability of the Volvo closed-loop control fuel injection system, now in use on vehicles in the US, to maintain the stoichiometric air/fuel mixture needed for optimum emission control and to compensate for the change in fuel stoichiometry encountered in gasoline/alternate fuel mixtures is examined. The system was found to have the ability to completely compensate for gasoline/ethyl alcohol mixtures up to 30% ethyl alcohol with no loss in emission control. Gasoline/methyl alcohol blends were also tested successfully. There is definite potential for the three-way conversion catalyst/closed-loop systems to provide our nation with flexibility in fuel formulation not otherwise found in conventional fuel metering systems. With proper planning and engineering, nonpetroleum derived fuels can be blended with gasoline without requiring engine adjustments or compromising emission controls.

• Research Organization: Engelhard Minerals and Chemicals Corp., Menlo Park, NJ
• OSTI ID: 6873044
• Journal Information: SAE Prog. Technol.; (United States), Vol. 19; Conference: Congress and exposition, Detroit, MI, USA, Feb 1979
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
10 SYNTHETIC FUELS
CARBON MONOXIDE
AIR POLLUTION CONTROL
CATALYTIC CONVERTERS
PERFORMANCE
ETHANOL FUELS
FUEL ADDITIVES
HYDROCARBONS
METHANOL FUELS
NITROGEN OXIDES
SPARK IGNITION ENGINES
EXHAUST GASES
AUTOMOBILES
EXPERIMENTAL DATA
GASOLINE
ADDITIVES
ALCOHOL FUELS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
DATA
ENGINES
EQUIPMENT
FLUIDS
FUELS
GASEOUS WASTES
GASES
HEAT ENGINES
INFORMATION
INTERNAL COMBUSTION ENGINES
LIQUID FUELS
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
SYNTHETIC FUELS
VEHICLES
WASTES
330700* - Advanced Propulsion Systems- Emission Control
330800 - Emission Control- Alternative Fuels
090210 - Alcohol Fuels- Properties- (1976-1989)