• English
  • Deutsch
  • Log In
    Password Login
    Research Outputs
    Fundings & Projects
    Researchers
    Institutes
    Statistics
Repository logo
Fraunhofer-Gesellschaft
  1. Home
  2. Fraunhofer-Gesellschaft
  3. Artikel
  4. Friction Response of Piston Rings for Application-like Starvation and Benefit of Amorphous Carbon Coatings
 
  • Details
  • Full
Options
2022
Journal Article
Title

Friction Response of Piston Rings for Application-like Starvation and Benefit of Amorphous Carbon Coatings

Abstract
The oil supply at the interface between the top ring and the cylinder liner (TRCL) plays a major role in an internal combustion engines efficiency. In particular, the interface forms a trade-off between the serving of enough lubricant for sufficient lubrication conditions and emissions through subsequent combustion. This can lead to deficient top ring lubrication conditions. In this study, a new developed reciprocating long-stroke tribometer, enabling the variation of oil supply, is used to investigate such application-like starved lubrication conditions of the TRCL interface. With the simulative investigations, a comparison with the fired engine is possible. The performance of diamond-like carbon coatings is compared to standard nitrided piston rings. It was found that the tetrahedral amorphous carbon (ta-C) coatings exhibit up to 31% reduced friction as well as a lower wear under starved lubrication conditions. Simulative investigations show a good correlation between engine friction and tribometer measurements for selected oil supply conditions.
Author(s)
Michelberger, Björn
Steinbeis-Innovationszentrum Friedrichshafen
Jaitner, Dirk
AVL Deutschland  
Hagel, Andreas
Steinbeis-Innovationszentrum Friedrichshafen
Striemann, Patrick
Steinbeis-Innovationszentrum Friedrichshafen
Kröger, Benjamin
Steinbeis-Innovationszentrum Friedrichshafen
Wetzel, Franz-Josef
Bayerische Motoren Werke AG -BMW-, München  
Leson, Andreas  
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Lasagni, Andrés-Fabián  
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Journal
Coatings  
Open Access
DOI
10.3390/coatings12060738
Language
English
Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS  
Keyword(s)
  • application-like starvation

  • tetrahedral amorphous carbon

  • friction

  • top piston ring

  • Cookie settings
  • Imprint
  • Privacy policy
  • Api
  • Contact
© 2024