Modeling of piston ring wear

Abstract

A theoretical study of piston ring wear in large two-stroke engines is presented. Piston rings in combustion engines are manufactured with an initially defined shape of the surface contacting the cylinder liner. Further the ring surface working against the cylinder liner is coated with layers of ceramic materials to accommodate the running-in process. Most rings have a nonflat shape (parabolic) when delivered from the ring supplier. After running in which is typically many hours of operation( >1000 h) the ceramic layers are worn and the ring geometry is typically changed significantly by surface wear. It is shown in the present study that the geometry of the worn ring depends on the operation scheme of the engine. Both the load pattern and the order in which the loads are applied influences the final shape of the piston ring surface.

Keywords

Piston ring surface wear combustion engine friction model wear model

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References

Priest

Dowson

Taylor

. Predictive wear modelling of lubricated piston rings in a diesel engine. Wear 1999; 231: 89–101.

Morris

Rahmani

Rahnejat

, et al. The influence of piston ring geometry and topography on friction. Proc IMechE, Part J: J Engineering Tribology 2013; 227: 141–153.

Coy

. Practical applications of lubrication models in engines. Tribol Int 1998; 31: 563–571.

Sherrington

Mercer

. The use of topography-based parameters for the assessment and prediction of surface wear. Lubr Sci 2000; 7: 1–11.

Priest

Taylor

. Automobile engine tribology – approaching the surface. Wear 2000; 241: 193–203.

Tønder

. A dynamic model for lubricated sliding wear and running-in. J Tribol 1991; 113: 499–505.

, et al. Break-in liner wear and piston ring assembly friction in a spark ignited engine. Tribol Trans 1998; 41: 497–504.

Henien

. In situ wear measuring technique in engine cylinders. Tribol Trans 1998; 41: 579–585.

Castleman

. A hydrodynamical theory of piston ring lubrication. Physics 1936; 7: 364–367.

10.

Papadopoulos

Priest

Rainforth

. Investigation of fundamental wear mechanisms at the piston ring and cylinder wall interface in internal combustion engines. Proc IMechE, Part J: J Engineering Tribology 2007; 221: 333–343.

11.

Truhana

Blau

. A rig test to measure friction and wear of heavy duty diesel engine piston rings and cylinder liners using realistic lubricants. Tribol Int 2005; 38: 211–218.

12.

Henien

Bryzik

. A model for wear and friction in cylinder liners and piston rings. Tribol Trans 2006; 49: 315–327.

13.

Zhang

, et al. 3-D numerical simulation and experiment study on the wear of piston ring-cylinder liner. Adv Mater Res 2010; 139–141: 1036–1039.

14.

Bernard

Hamrock

. Fundamentals of fluid film lubrication, New York: Marcel Dekker, 1994.

15.

Lund JW. Self-excited, stationary whirl orbits of a journal in a sleeve bearing. PhD Thesis, Rensselaer Polytechnic Institute, USA, 1966.

16.

Lund

. Review of the concept of dynamic coefficients for fluid film bearings. J Tribol-T ASME 1987; 109: 37–41.

17.

Klit P and Vølund A. Shaft center orbit in dynamically loaded radial bearings. In: World tribology congress III, September 2005.

18.

Vølund A. Measurement and calculation of frictional loss in large two-stroke engines. PhD Thesis, Technical University of Denmark, Denmark, 2003.

19.

Han

Lee

. Analysis of the piston ring lubrication with a new boundary condition. Tribol Int 1998; 31: 753–760.

20.

Harigaya

Suzuki

Toda

, et al. Analysis of oil film thickness and heat transfer on a piston ring of a diesel engine: effect of lubricant viscosity. J Eng Gas Turbines Power 2006; 128: 685–693.