This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Mixed Lubrication and Roughness Surface Effects Application to Piston Rings
Technical Paper
2007-01-1246
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The mixed lubrication phenomenon is becoming a key issue for reliable and low friction engine design. Three main reasons can explain this fact. The increase of the engine torques at low speed has generated very low oil film thicknesses in lubricated devices. For the last ten years car manufacturers have decreased the viscosity of the oil in order to reduce friction and the oil temperatures on lubricated components have increased along with the specific power increase.
Two kinds of approach, the global and the local approach, must be considered to analyze the mixed lubrication and the lubricated component behavior.
From a global point of view, the various mechanisms to consider to get a realistic modelling of mixed lubrication are considered.
From a local point of view, the modelling of the asperity contacts between antagonist surfaces responsible of the mixed lubrication is detailed. Commonly, a Gaussian type of distribution is used for asperity summit distribution. However, this kind of distribution has a significant influence on the load generated by direct contact, on the friction and heat generated particularly at low contact pressure. In order to show the importance of the asperity summit distribution, at the transition between hydrodynamic and mixed lubrication, one example of modelling is provided. This example refers to piston ring lubrication. This paper leads to the conclusion that in spite of the effort required to introduce contact models in mixed lubrication, it does represent an important contribution for reliability analysis.
Recommended Content
| Technical Paper | Modelling of the Asperity Contact Area on Actual 3D Surfaces |
| Technical Paper | Use of Simulation Tools in EGR Development Process |
| Technical Paper | Oil Consumption Optimisation in a Small 4 Stroke Gasoline Engine |
Citation
Ligier, J. and Ragot, P., "Mixed Lubrication and Roughness Surface Effects Application to Piston Rings," SAE Technical Paper 2007-01-1246, 2007, https://doi.org/10.4271/2007-01-1246.Also In
References
- LIGIER J.L. RAGOT P. Piston Pin: Wear and Rotating Motion SAE Paper. 2005-01-1651
- ROHDE S.M. A Mixed Friction Model for Dynamically Loaded Contacts with Application to Piston Ring Lubrication Winter Annual Meeting of the ASME Chicago. Illinois Nov 16-21 ROHDE S.M. CHENG H.S. 1980
- Liu LIAN Tian TIAN Implementation and Improvements of a Flow Continuity Algorithm in Modeling Ring/Liner Lubrication SAE Paper 2005-01-1642
- GREENWOOD J.A. WILLIAMSON J.P.B. Contact of Nominally Flat Surfaces Proc. R. Soc. London 300 319 1966
- GREENWOOD J.A. TRIPP. J.H. The contact of two nominally flat rough surfaces Proc. Instn. Mech. Engrs. 1971 185 48 71
- PATIR N. CHENG H.S. An Average Flow Model for Determining Effects of Three Dimensional. Roughness on Partial Hydrodynamic Lubrication Journal of Lubrication Technology 110 1 12 17 1978
- LIGIER J.L. BARON E. Acyclisme et Vibrations. Technip 2003
- FURUHAMA S. TAGIKUCHI AM Measurement of Piston Frictional Force on Actual Operating Diesel Engine SAE Technical Paper 790855
- XU J. al. Numerical And Experimental Investigation of Piston Ring Friction Proceedings of ICES. ASME int. Combustion Engine April 5-7 2005 Chicago
- JAEGER J.C. Moving Sources of Heat and The Temperatures at Sliding Contacts Proc. Roy. Soc. N.S.W. 76 1943 203 224
- ZAVARISE G. BORRI-BRUNETTO M. PAGGI M. On the Reliabilities of Microscopical Contact Models Wear 257 229 245 2004
- Mc COOL J.I. Comparison of Models for the Contact of Rough Surfaces Wear 107 1986 37 60
- Greenwood J.A. A Unified Theory of Surface Roughness Proc-R. Soc. Lond. A 393 133 157 1984
- Mc COOL J.I. Relating Profile Instrument Measurements to the Functional Performance of Rough Surfaces Trans ASME 109 April 1987
- Mc COOL J.I. Extending the Capability of the Greenwood Williamson Microcontact Model Trans. ASME 122 July 2000
- TOMANIK E. CHACON H. TEXEIRA G. A simple numerical procedure to calculate the input data of Greenwood-Williamson model of asperity contact for actual engineering surfaces Tribology Research DOWSON D. and al Elsevier 2003
- TOMANIK E. Modelling of the Asperity Contact Area on Actual 3D surfaces SAE Paper 2005-01-1642
- ISHIJIMA T. al. An Analysis of Ring Temperature, Oil Film Temperature, Oil Film Thickness and Heat Transfer on a Piston Ring of an IC Engine in Consideration of Ring Movement in a Cycle ASME Congress Aachen, Germany May 8-10 Proceedings
- MIERBACH A. DUCK G.E. NEWMAN B.A. Heat Flow Through Piston Ring And Its Influence on Shape SAE paper 831283
- SUN D., C. A Thermal Elastic Theory of Piston. Ring and Cylinder. Bore contact Journal of Applied Mechanics March 1991 58