Effectiveness of mandated oxygenated fuel usage to reduce carbon monoxide exhaust levels in Colorado
An examination of Colorado Automobile Inspection and Readjustment (A.I.R.) two-speed exhaust emissions testing results was undertaken to evaluate changes in carbon monoxide exhaust levels due to the use of oxygenated fuels. Vehicles utilized within the study were separated according to their various emission control technologies: precatalyst (1938 to 1974), catalyst (1975 to 1980), and closed-loop (1981 to 1988). It was found that pre-catalyst and catalyst vehicles utilizing oxygenated fuels had significant reductions in carbon monoxide exhaust levels at 2,500 R.P.M. Results for closed-loop vehicles at 2,500 R.P.M. showed no significant reductions in carbon monoxide exhaust levels. Further examination of idle data for closed-loop vehicles indicated that a small percentage of these vehicles were considered gross-emitters based on the 1.5 percent cut-point set in Colorado. Results of the study indicated that the impact of oxygenated fuels, as well as the rationale for using such fuels as a carbon monoxide reduction strategy, may be difficult to justify as newer, more sophisticated light-duty vehicles comprise a larger proportion of the overall vehicle population in Colorado.
- Research Organization:
- Colorado State Univ., Fort Collins, CO (United States)
- OSTI ID:
- 5674848
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AUTOMOBILES
EXHAUST GASES
CARBON MONOXIDE
AIR POLLUTION CONTROL
COLORADO
AIR POLLUTION
POLLUTION CONTROL EQUIPMENT
ZIEGLER CATALYST
CARBON COMPOUNDS
CARBON OXIDES
CATALYSTS
CHALCOGENIDES
CONTROL
DEVELOPED COUNTRIES
EQUIPMENT
FEDERAL REGION VIII
FLUIDS
GASEOUS WASTES
GASES
NORTH AMERICA
OXIDES
OXYGEN COMPOUNDS
POLLUTION
POLLUTION CONTROL
USA
VEHICLES
WASTES
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)