Quantitative Analysis of Leakage Suppression of DLC Coating on Piston Ring

Paper #:
  • 2017-01-0457

Published:
  • 2017-03-28
Pages:
7
Abstract:
Piston ring wear in gasoline engine induces deterioration of emissions performance due to leakage of blow-by gas, instability of idling caused by reduced compression in combustion chamber, and to generate early degeneration of engine oil. We examined anti-wear performance of DLC coating on piston ring, which had been recently reported as an effective method for improving the abrasion resistance. As a result, wear rate remained low under the condition of DLC existence on sliding surface, but once DLC was worn out completely, wear of the piston ring was accelerated and its life became shorter than piston ring without DLC. In this research, we designed reciprocating test apparatus that operates at much higher velocity range, and characterized the frictional materials of the piston ring and sleeve and the DLC as a protective film, a vapor phase epitaxy (VPE) was actively used as a means to form certain level of convex and concave shape on its surface. As a result, we achieved higher wear durability by devising a combination of DLC and underlying. Calculation of compression gas leakage from Piston ring end gap is also introduced.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Attention: This item is not yet published. Pre-Order to be notified, via email, when it becomes available.
Select
Price
List
Download
$22.00
Mail
$22.00
Members save up to 36% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Technical Paper / Journal Article
2004-01-16
Standard
1966-08-01
Standard
1968-06-01
Standard
2001-12-11
Article
2016-03-01
Training / Education
2011-04-20