Effects of Gasoline Composition and Properties on Vehicle Emissions: A Review of Prior Studies - Auto/Oil Air Quality Improvement Research Program

Paper #:
  • 912321

Published:
  • 1991-10-01
Citation:
Koehl, W., Benson, J., Burns, V., Gorse, R. et al., "Effects of Gasoline Composition and Properties on Vehicle Emissions: A Review of Prior Studies - Auto/Oil Air Quality Improvement Research Program," SAE Technical Paper 912321, 1991, https://doi.org/10.4271/912321.
Pages:
35
Abstract:
Prior studies of the effect of gasoline composition and physical properties on automotive exhaust and evaporative emissions have been reviewed. The prior work shows that the parameters selected for investigation in the Auto/Oil Air Quality Improvement Research Program (AQIRP) - gasoline aromatics content, addition of oxygenated compounds, olefins content, 90% distillation temperature, Reid vapor pressure, and sulfur content - can affect emissions. Effects have been observed on the mass of hydrocarbon, CO, and NOx emissions; on the reactivity of emissions toward ozone formation; and on the emissions of designated toxic air pollutants. The individual effects of some of the AQIRP parameters have been studied extensively in modern vehicles, but the most comprehensive studies of gasoline composition were conducted in early 1970 vehicles, and comparing the various studies shows that fuel effects can vary among vehicles with different control technology. Compared with prior studies, the AQIRP is the most comprehensive and systematic study of the combined effects of fuel parameters on emissions from modern vehicles.
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