Effects of Engine Parameters and Catalyst Composition on Vehicle Sulfate Emissions

McKee, Douglas E.

doi:10.4271/770167

Cited by 12 publications

(5 citation statements)

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“…The vehicle measurements were made with a dilution tube, into which exhaust was injected from a vehicle running on a chassis dynamometer. The dilution tube/dynamometer system lias been described in detail previously (21). All experiments were run at a dilution tube flow rate of 17 m3/min (600 cfm).…”

Section: Experimental Methodsmentioning

confidence: 99%

Sulfate in diesel exhaust

Truex¹,

Pierson²,

McKee³

1980

Environ. Sci. Technol.

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Section: Experimental Methodsmentioning

confidence: 99%

Sulfate in diesel exhaust

Truex¹,

Pierson²,

McKee³

1980

Environ. Sci. Technol.

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“…For the collection of diluted particulate emissions (McKee, 1977), three equivalent sampling sites were utilized. At site 1, ultrathin PTFE-membrane filters (Gelman 2-um Teflo: thickness, 25 «m; pore size, 2 jum) were used for compositional TGA.…”

Section: Methodsmentioning

confidence: 99%

Relationship between the composition of engine particulate emissions and emission control system performance

Zinbo¹,

Korniski²,

Weir³

1995

Ind. Eng. Chem. Res.

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This study was carried out to determine the effect of simulated engine and catalyst malfunction conditions on the mass and composition of tailpipe particulate emissions from a 1990 Ford Taurus, running on a 3.2% oxygenated gasoline blend. Particulate emissions ranged from 2.0 to 4.4 mg/mi under all conditions studied. These emission levels are far below the current U.S.EPA standard of 80 mg/mi. Soot was a major component of postcatalyst particulate emissions (6570%). Thermogravimetry demonstrated that only the low-to-medium boiling fraction of the engine oil was emitted from the cylinder walls and crevices. The catalyst aftertreatment significantly reduced the emissions of the low-to-medium boiling components, i.e., from 1.9 to 0.1 mg/mi. The formation of major organic compounds found in the postcatalyst particulate emissions has been explained by the thermal oxidation of aliphatic base-oil hydrocarbons. The level of ash emissions was relatively constant under all conditions (0.4-0.5 mg/mi>. The particulate composition data can be useful in helping to diagnose emission control system performance.

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“…3 Three city vehicle schedule (CVS) cycles were collected on one 20 X 20 inch Teflon coated glass fiber filter for each sample. One CVS cold start followed by a 10-minute soak was done before each sample collection.…”

Section: Methodsmentioning

confidence: 99%