The influence of ambient temperature on tailpipe emissions from 1985 to 1987 model year light-duty gasoline motor vehicles—II

Stump, Fred D.; Tejada, Silvestre B.; Ray, William D.; Dropkin, D.; Black, Frank; Snow, Richard; Crews, William; Siudak, Paula; Davis, C.O.; Carter, Phillip

doi:10.1016/0960-1686(90)90244-h

Cited by 19 publications

(12 citation statements)

References 7 publications

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“…The 1987 composite summertime gasoline is 1% more reactive for whole gasoline and 12% more reactive for gasoline vapors per unit mass of emissions when compared to the wintertime composite fuel for the same year. Revised speciation profiles for summertime whole gasoline and gasoline headspace vapors are given in (16,17,, and three-way catalyst (23)(24)(25) equipped light-duty vehicles. Other measurements of exhaust speciation have been made in highway tunnels (26)(27)(28)(29)(30), in a parking garage (30), at the roadside (31), and on board a fleet of noncatalyst vehicles driven over a range of speeds (32).…”

Section: Speciation Profile Developmentmentioning

confidence: 99%

“…Six vehicles from this study were tested using a premium summer-grade gasoline. Exhaust speciation data from these six vehicles have been averaged with data from another EPA study (23,24) and with data for older (1983)(1984)(1985) vehicles from the auto/oil study (25) to form the revised speciation profile, with all vehicles within a single study averaged together to form composite profiles, and a final composite profile obtained by averaging results from each of these studies together, with equal weighting assigned to each study. The one-third weighting assigned to the speciation data for the 6 vehicles from the 46-car study tested using premium-grade gasoline matches the fraction of unleaded gasoline sales that was premium grade in Los Angeles in 1987 (14).…”

Section: Speciation Profile Developmentmentioning

confidence: 99%

See 1 more Smart Citation

Respeciation of organic gas emissions and the detection of excess unburned gasoline in the atmosphere

Harley¹,

Hannigan²,

Cass³

1992

Environ. Sci. Technol.

184

150

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Section: Speciation Profile Developmentmentioning

confidence: 99%

Section: Speciation Profile Developmentmentioning

confidence: 99%

Respeciation of organic gas emissions and the detection of excess unburned gasoline in the atmosphere

Harley¹,

Hannigan²,

Cass³

1992

Environ. Sci. Technol.

184

150

View full text Add to dashboard Cite

“…b Exhaust speciation for gasoline-powered light-duty vehicles without catalytic converters (45).' Exhaust speciation for catalyst-equipped gasoline-powered light-duty vehicles (46)(47)(48)(49). d Composition of whole liquid gasoline (50).'…”

Section: Model Applicationmentioning

confidence: 99%

“…Environmental Protection Agency (47)(48)(49). Separate profiles that describe the composition of unburned liquid gasoline and the vapors existing in the headspace over the liquid fuel are derived from measurements made on composite Los Angeles gasoline samples (50), updated to reflect 1987 sales of gasoline by grade (26).…”

Section: Model Applicationmentioning

confidence: 99%

Modeling the concentrations of gas-phase toxic organic air pollutants: direct emissions and atmospheric formation

Harley¹,

Cass²

1994

Environ. Sci. Technol.

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“…The final column in the table gives average values from recent exhaust emission studies conducted with gasoline vehicles. 14 ' 15 These results enable comparisons of hydrocarbons compositions between the Variable Fuel Corsica and typical in-use gasoline-powered vehicles. In general, the hydrocarbon composition from gasoline vehicle exhaust emissions appears similar to those from the variable-fuel vehicle, except for methane, as discussed above.…”

Section: Exhaust Emissionsmentioning

confidence: 97%

Characterization of Emissions from a Variable Gasoline/Methanol Fueled Car

Gabele

1990

Journal of the Air & Waste Management Association

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In response to the occurrence of the increasingly severe ambient ozone exceedances, regional environmental managers are examining the possibility of a cleaner fuel for automobiles. At this time the leading candidate appears to be methanol. In anticipation of a shift to methanol, flexible-fueled automobiles capable of operating on gasoline and/or methanol are being developed. This study examines both the exhaust and evaporative emissions from a prototype General Motors Variable Fuel Corsica. Results are reported for tests conducted at temperatures of 40 degrees, 75 degrees, and 90 degrees F, and for fuels M0 M25, M50, M85, and M100. In addition to regulated emissions and fuel economy, emission rates for methanol, aldehydes, and a large number of hydrocarbon compounds were measured. The data indicate that increasing the fuel's methanol content does not affect the exhaust organic emission rate (calculated in accordance with the regulation) from flexible-fueled cars, but formaldehyde and methanol comprise increasingly greater portions of the organic material while hydrocarbons comprise less. Increasing fuel methanol content has no significant effect on exhaust regulated emission rates (organic material, carbon monoxide, and nitrogen oxides) nor on the composition of total hydrocarbons, except for methane, which increases substantially. The effect of ambient temperature on both exhaust and evaporative emissions is similar to its effect on gasoline cars: organic and carbon monoxide exhaust emissions increase substantially at the lower temperatures, and evaporative emissions increase steadily with increases in temperature.

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The influence of ambient temperature on tailpipe emissions from 1985 to 1987 model year light-duty gasoline motor vehicles—II

Cited by 19 publications

References 7 publications

Respeciation of organic gas emissions and the detection of excess unburned gasoline in the atmosphere

Respeciation of organic gas emissions and the detection of excess unburned gasoline in the atmosphere

Modeling the concentrations of gas-phase toxic organic air pollutants: direct emissions and atmospheric formation

Characterization of Emissions from a Variable Gasoline/Methanol Fueled Car

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