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Piston Ring Behaviour Simulation Considering Mixed-Lubrication and Flexibility

[+] Author Affiliations
Adolfo Senatore, Vincenzo D’Agostino

University of Salerno, Fisciano, Italy

Paper No. DETC2005-85239, pp. 817-822; 6 pages
  • ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 1: 20th Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C
  • Long Beach, California, USA, September 24–28, 2005
  • Conference Sponsors: Design Engineering Division and Computers and Information in Engineering Division
  • ISBN: 0-7918-4738-1 | eISBN: 0-7918-3766-1
  • Copyright © 2005 by ASME


An important portion of the total power loss in a modem automotive engine is due to piston ring/cylinder bore friction. This paper introduces the results of simulations about the interaction of a SI engine piston ring taking into account the mixed lubrication regime, the ring flexibility in presence of piston approaching motion to the cylinder liner. The friction force calculations show a visible difference between the ring portion interacting with the two cylinder sides (Thrust and Anti-Thrust) due to specific oil film wedges caused by flexibility and piston lateral motion. The effects of engine speed, radial tension, surface roughness and ring shape are also investigable.

Copyright © 2005 by ASME



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