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A Two Ring Piston for Gasoline Engines
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English
Abstract
Low mass, low friction and low compression height pistons are vital in order to sustain the drive to obtain utmost fuel economy and design refinement in reciprocating piston engines.
Much has already been done and a further step forward in the attainment of the objectives is the introduction of a fully durable two ring piston.
Developments at Hepworth and Grandage have led to a successful design which meets the present requirements of engine manufacturers in terms of performance and durability and has the potential to reduce weight and compression height and probably to reduce friction.
The compression ring of the two ring piston system can be used with advantage as the top compression ring of an orthodox three ring piston.
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Topic
Citation
Holt, J. and Murray, E., "A Two Ring Piston for Gasoline Engines," SAE Technical Paper 860248, 1986, https://doi.org/10.4271/860248.Also In
References
- Furuhama, S. Kojima, M. Enomoto, Y. Yamaguchi, Y. - “Some studies on Two-Ring-Pistons in Automobile Turbocharged Gasoline Engine” SAE Paper 840183
- Furuhama, S. Hiruma, M.H. Takamatsu, H.T. “Development of a two-ring piston with low friction and small compression height without increase in blowby, overheat and oil consumption” Institution of Mechanical Engineers Paper C63/85
- Geffroy, R. French Patent No. 2 518 690
- Ruddy, B. Dowson, D. Economou, P. “A review of studies of piston ring lubrication” Proceedings of 9th Leeds/Lyon Symposium on Tribology Leeds 1982
- Rhodes, M.L.P. Parker, D.A. -“AEconoguide - The Low Friction Piston” SAE Paper 840181
- Ruddy, B.L. Reid, T.J. Veshagh, A. “Ring Pack Performance Predictions” AEplc 1986 Symposium
- Lang, O.R. “Friction losses in Combustion Engines” Schmiertechnik + Tribologie 29 January 3 1982
- Kuhlman, P.F. Jakobs, R. “Possible reduction in fuel consumption by modifying the piston ring” Institution of Mechanical Engineers - Paper C72/85