The Effect of Fuel-Oil Solubility on Exhaust HC Emissions

Trinker, Frederick H.; Anderson, Richard W.; Henig, Y. I.; Siegl, Walter O.; Kaiser, E. W.

doi:10.4271/912349

Cited by 23 publications

(2 citation statements)

References 11 publications

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“…Although the estimated OH reaction rate constants for these two species are very similar at high temperature (20), it is possible that some of the difference could arise from a slightly larger reactivity of cyclohexane. In addition, the oil solubility of methylcyclohexane will be greater than that of cyclohexane because of its higher boiling point, as was observed for n-heptane relative to n-hexane (21). This could also produce a small increase in emissions for methylcyclohexane.…”

Section: Total Emissions Resultsmentioning

confidence: 99%

Effect of fuel structure on emissions from a spark-ignited engine. 2. Naphthene and aromatic fuels

Kaiser¹,

Siegl²,

Cotton³

et al. 1992

Environ. Sci. Technol.

101

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Section: Total Emissions Resultsmentioning

confidence: 99%

Effect of fuel structure on emissions from a spark-ignited engine. 2. Naphthene and aromatic fuels

Kaiser¹,

Siegl²,

Cotton³

et al. 1992

Environ. Sci. Technol.

101

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“…These are also the lowest engine-out emissions reported from any premixed, hydrocarbon-fueled, sparkignited engine to our knowledge. Crevice storage will dominate the source terms of HC emission for lean operation on nonaromatic fuels having eight or fewer carbon atoms, because oil absorption will be a small effect (5). Thus, ethylene might be expected to exhibit total hot FID HC emissions similar to isooctane rather than 5-8 times less (see Tables I, II, and data in ref 1).…”

Section: Species Measurementsmentioning

confidence: 99%

Effect of fuel structure on emissions from a spark-ignited engine. 3. Olefinic fuels

Kaiser¹,

Siegl²,

Cotton³

et al. 1993

Environ. Sci. Technol.

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A single-cylinder, production-type engine has been run at four operating conditions on four olefinic fuels (ethylene, 1-butene, 1-hexene, and diisobutylene) and two blends (n-hexane with toluene and 20 % diisobutylene with a fully blended gasoline). Engine-out hydrocarbon (HC) emissions (total and species), NO*, CO, and CO2 have been measured. Total HC emissions from the olefinic fuels increase with the molecular weight of the fuel (e.g., from 320 ppm Cj for ethylene to 1420 ppm Ci for diisobutylene during lean operation). The HC emission for each olefin is lower, and the NO* emission is higher than that of the corresponding alkane. 1,3-Butadiene is significant for the straight-chain terminal olefins, 1-butene and 1-hexene, but is much less important for the highly branched olefin, diisobutylene. For the diisobutylene-gasoline blend, the mole fractions of products unique to diisobutylene combustion can be predicted to within 10% based on data from diisobutylene, gasoline, and the concentration of diisobutylene in the blend. Thus, the exhaust emissions are approximately additive. For the hexane-toluene blend, no appreciable formation of alkyl-substituted toluenes is observed.

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Visualisation of fuel‐lubricant interaction on the cylinder surface in the combustion chamber of SI engines

Kovács¹

1995

Lubrication Science

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Visualisation of fuel component penetration and release into the lubricating oil layer covering the combustion chamber wall has been achieved, using a laser‐induced fluorescence (LIF) test technique. Experimental data show that fuel component penetration into the oil layer contributes not only to unburnt hydrocarbon emissions in spark ignition (SI) engines, but also to engine oil degradation. Fuel components accumulated in the oil layer are transferred to the bulk in ring belt zones, after a measurable residence time. A significant difference in film thickness between the oil layer on the combustion‐chamber wall during the intake/compression sequence, as against the expansion/exhaust sequence, indicates that in the ring belt zones and above, engine oil viscosity, and hence load‐carrying capacity, is influenced by fuel absorption/desorption in the engine oil.

show abstract

The Effect of Fuel-Oil Solubility on Exhaust HC Emissions

Cited by 23 publications

References 11 publications

Effect of fuel structure on emissions from a spark-ignited engine. 2. Naphthene and aromatic fuels

Effect of fuel structure on emissions from a spark-ignited engine. 2. Naphthene and aromatic fuels

Effect of fuel structure on emissions from a spark-ignited engine. 3. Olefinic fuels

Visualisation of fuel‐lubricant interaction on the cylinder surface in the combustion chamber of SI engines

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