This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Piston Pin: Wear and Rotating Motion
Technical Paper
2005-01-1651
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
In new engines, running conditions for piston pin bushes have become very severe due to combustion pressure and temperature increase. Moreover, the lead removal from the bush material has strongly reduced the capability of the antifriction material to accept asperity contacts, geometrical defects or edge loading. Today, it is usual that wear and seizure occur in the piston pin bushes during the first steps of engine development.
In order to propose basic design recommendations avoiding damage, during the early steps of engine development, it is necessary to have quick numerical simulations. In these calculations, the mixed lubrication in the piston pin bearings must be taken into account. To obtain a simple realistic tool, a refined contact model is implemented in a simple hydrodynamic lubrication program. Then, the general behaviour of the piston pin is described before focusing on the combustion cycle phases when damage may occur. The oil film thickness variations during cycle are described and show what the critical phases are. Several parameters like pin diameter, temperature, pressure-viscosity coefficient have been investigated in order to understand their influence. To have an efficient wear modelling a special emphasis is put on the description of asperity contacts in order to built a wear model for bearings located on the piston pin. In this wear model, the surface topography parameters are taken into account in order to have a realistic approach and to identify the optimal roughness parameters.
Recommended Content
Authors
Citation
Ligier, J. and Ragot, P., "Piston Pin: Wear and Rotating Motion ," SAE Technical Paper 2005-01-1651, 2005, https://doi.org/10.4271/2005-01-1651.Also In
References
- Masaaki Takigushi Masami Oguri Tsuneo Someya A Study of Rotating Motion of Piston Pin in Gasoline Engine SAE 0938142
- Kazushi Tomita Kenichi Nagasawa Masaaki Takiguchi Tsuneo Someya Yutaka Tazaki A Study of Rotating Motion of Piston Pin in Gasoline Engine SAE 0948115
- Tadahiro Suhara Toshikazu Takei Masaaki Takiguti Characteristics of Friction Force on Piston Pin Boss Bearings SAE 0968195
- Khonsari M. M. Booser E.R. Applied Tribology, Bearing Design and Lubrication John Wiley & Sons 2001
- Ligier J.-L. Avaries de lubrification. Applications aux paliers moteurs. Editions Technip 2004
- Alexeyev N. Jahanmir S. Mechanics of friction in self lubricating composite materials Wear 166 1993
- Hayes D.F. Squeeze Films:A Finite Journal Bearing with a fluctuating Load ASME Transactions, Journal of Basic Engineering 83 579 588 1961
- Ligier J.-L. Lubrification des Paliers Moteurs. Edition Technip 1997
- Bonneau D. Traitement des problèmes de lubrification par la méthode des éléments finis Hermès 2002
- Greenwood, J. A. Williamson J. B. P. Contact of Nominally Flat Surfaces Proceedings of the Royal Society 295 300 319 1966
- Robbe-valloire F. Statistical analysis of asperities on a rough surface Wear 249 401 408 2001
- 1996
- Greenwood, J. A. Tripp, J. H. The Elastic Contact of Rough Surfaces Wear 107 37 60 1967
- Robbe-valloire F. Paffoni B. Progri R. Load transmission by elastic, elasto-plastic or fully plastic deformation of rough interface asperities Mechanics of Materials 33 617 633 2001
- Nayak P.R. Random Process model of rough surfaces J. Lubric. Techno. 93 397 407 1971 McCool J. Extending the Capability of the Greenwood Williamson Microcontact Model Transaction of the ASME 122 July 2000
- Rabinowicz E. Friction and Wear John Wiley and Sons Second 1995