Integrated modeling of ring pack performance

Keribar R., Dursunkaya Z., Flemming M. F.

Proceedings of the Annual Automotive Technology Development Contractors' Meeting, Dearborn, MI, USA, 22 - 25 October 1990, pp.353-366 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume:
  • City: Dearborn, MI, USA
  • Page Numbers: pp.353-366
  • Middle East Technical University Affiliated: Yes


This paper describes an integrated model developed for the detailed characterization and simulation of piston ring pack behavior in internal combustion engines and the prediction of ring pack performance. The model includes comprehensive and coupled treatments of 1) ring-liner hydrodynamic and boundary lubrication and friction; 2) ring axial, radial and (toroidal) twist dynamics; 3) inter-ring gas dynamics and blowby. The model also includes characterizations of oil transport by rings, as film and of ring-bore conformability. The physics of each of these highly inter-related phenomena are represented by submodels which are intimately coupled to form a design-oriented predictive tool aimed at the calculation of ring film thicknesses, ring motions, land pressures, engine friction and blowby. The paper also describes the results of a series of analytical studies investigating effects of engine speed and load and ring pack design parameters, on ring motions, film thicknesses, inter-ring pressures as well as ring friction and blowby.