Improvements of Valve Stem Seals to Meet Future Emission Requirements

Paper #:
  • 980581

Published:
  • 1998-02-23
Citation:
Netzer, J. and Maus, K., "Improvements of Valve Stem Seals to Meet Future Emission Requirements," SAE Technical Paper 980581, 1998, https://doi.org/10.4271/980581.
Pages:
8
Abstract:
Due to the current and future emission regulations, nearly every new internal combustion engine has to be equipped with valve stem seals.The optimal seal is designed to meet the increasingly severe emission regulations by constantly metering the oil flow to allow adequate lubrication of the valve stem/ guide while at the same time minimizing oil flow to the combustion chamber and hence minimizing emissions. The seal has to compensate for manufacturing tolerances of the cylinder head and to provide stability of the oil metering rate for all different running conditions over the life of the engine.To increase the constancy of the oil flow metered by the seals, a new stepped lip design was developed using finite element analysis.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Technical Paper / Journal Article
2010-04-12
Training / Education
2017-01-20
Book
2004-01-01
Training / Education
2016-03-10
Training / Education
2018-02-05