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The Influence of the Valve Stem Seal Oil Metering Rate on Exhaust Emissions
Technical Paper
2000-01-0683
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2000 World Congress
Language:
English
Abstract
A valve stem seal is designed to reduce oil flow from the valve train area of the cylinder head into the intake and exhaust port of the engine. However, these seals have to allow adequate lubrication of the valve stem / valve guide contact area and therefore need to provide a minimal amount of oil flow.
Even such small quantities of oil passing the seals into the ports and the combustion chamber will effect engine emissions.
Exhaust emission measurements on a modern 16 valve gasoline engine illustrate the seals contribution on total engine emissions and allow prediction of the effect of adjustments of the oil metering rate to actual engine requirements.
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Authors
Topic
Citation
Netzer, J., Piasecki, T., and Deussen, N., "The Influence of the Valve Stem Seal Oil Metering Rate on Exhaust Emissions," SAE Technical Paper 2000-01-0683, 2000, https://doi.org/10.4271/2000-01-0683.Also In
References
- GOETZE/CR Fachschrift E2 1979
- Improvements of Valve Stem Seals to Meet Future Emission Requirements SAE-Paper 980581
- Einfluss der Dichtigkeit der Ventilschaftabdichtungen auf die Schadstoffemission eines Ottomotors, Diplomarbeit in Fachbereich Kolbenmaschinen, FH-Koeln 08 Juni 99