This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Modeling of Ring Twist For an IC Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 19, 1998 by SAE International in United States
Annotation ability available
The development of a modern internal combustion engine can be characterized by three main trends: durability increase, emission reduction, and fuel economy improvement. Ring pack design addresses all of these issues. The ring behavior affects the blow-by past the ring pack, the oil film left on the cylinder liner, the friction force between the liner and the ring, and the wear of the ring and the cylinder liner. In order to predict these phenomena, the prediction of inter-ring gas flow and ring behavior, especially ring motion and ring twist about ring centroid, is needed. This paper presents the results of the modeling of 3-dimensional ring twist and its influence on ring performance and blow-by.
The TWIST program includes a 3-dimensional beam model of a piston ring. Based on ring cross sectional properties, ring tension, pressure load above and below the ring, friction force and inertia force, the model predicts axial displacement, radial displacement, bend angle and twist angle of the ring over an engine cycle for any arbitrary ring cross section and groove geometry.
CitationEjakov, M., Schock, H., and Brombolich, L., "Modeling of Ring Twist For an IC Engine," SAE Technical Paper 982693, 1998, https://doi.org/10.4271/982693.
- CASE Analysis System Theoretical Manual Compu-Tec Engineering, Inc. Chesterfield, Missouri 1995
- CASE Analysis System User's Manual Compu-Tec Engineering, Inc. Chesterfield, Missouri 1995
- Brombolich L.J. “Effect of Cylinder Distortion and Piston Ring Design on Oil Consumption and Friction Losses in Automotive Engines,” Report to US Department of Energy 1988
- Brombolich, L.J. “Structural Mechanics of Piston Rings” Compu-Tec Eng. Internal Report St. Louis, MO 1993
- Dawson, D. Economou, P.N. Ruddy, B.L. “Piston Ring Lubrication-Part II: Theoretical Analysis of a Single Ring and Complete Ring Pack,” Energy Conservation Through Fluid Film Lubrication Technology: Frontier in Research and Design 1979
- Ejakov, M.A. Hascher, H.G. Schock, H.J. Brombolich, L.J. Trinker, F.H. LoRusso, J.A. “Simulation Analysis of Ring Pack Bahavior in a Deactivated Cylinder,” 27-2 1996 Fall Technical Conference 2 ASME 1996
- Ejakov, M.A. Schock, H.J. Brombolich, L.J. Carlstrom, C.M. Williams, R.L. “Simulation Analysis of Inter-Ring Gas Pressure and Ring Dynamics and Their Affect on Blow-by,” 29-2 1997 Fall Technical Conference 2 ASME 1997
- FRAME 3D User's Manual Compu-Tec Engineering, Inc. Chesterfield, Missouri 1986
- Graham, N.A. Munro, R. “Investigation of Analysis of Oil Consumption and Blowby in Relation to Piston and Ring Features,” AE Symposium 1981
- Gulwadi, S.D. “A Mixed Lubrication and Oil Transport Model fro Piston Rings Using a mass Conserving Algorithm,” ASME ICE 25-2 129 139 1995
- Keribar, R. Dursunkaya, Z. Flemming, M.F. “An Integrated Model of Ring Pack Performance,” ASME Journal of Engineering for Gas Turbines and Power 113 382 389 1991
- Ruddy, B.L. Dawson, D. Economou, P.N. “Piston Ring Lubrication-Part III: The Influence of Ring Dynamics and Ring Twist,” Energy Conservation Through Fluid Film Lubrication Technology: Frontier in Research and Design 1979
- Ruddy, B.L. Dawson, D. Economou, P.N. “A Theoretical Analysis of the Twin-Land Type of Oil-Control Piston Ring,” J. Mech. Eng. Sci. 23 51 62 1981
- Swift, H.W. “Elastic deformation of piston Rings” Engineering 1947 161 165
- Tian T. Noorzij, L.B. Wong, V. W. Heywood, J.B. “Modeling piston-Ring Dynamics, Blow-by, and Ring-Twist Effects” 27-2 1996 Fall Technical Conference 2 ASME 1996
- Tian, T. Rabute, R. Wong, V. W. Heywood, J.B. “Effect of Piston-Ring Dynamics on Ring / Groove Wear and Oil Consumption in a Diesel Engine,” SAE Paper 970835 1997
- Ting, L.L. Mayer, J.E. “Piston Ring Lubrication and Cylinder Bore Analysis, Part I - Theory,” ASME Journal of Lubrication Technology 96 305 314 1974
- Young, W.C. “Roark's Formulas for Stress and Strain” Sixth Mcguire Hill, Inc. 1989