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Study of the Effects of Oil Supply and Piston Skirt Profile on Lubrication Performance in Power Cylinder Systems
Technical Paper
2019-01-2364
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In internal combustion engines, the majority of the friction loss associated with the piston takes place on the thrust side in early expansion stroke. Research has shown that the Friction Mean Effective Pressure (FMEP) of the engine can be reduced if proper modifications to the piston skirt, which is traditionally barrel-shaped, are made. In this research, an existing model was applied for the first time to study the effects of different oil supply strategies for the piston assembly. The model is capable of tracking lubricating oil with the consideration of oil film separation from full film to partial film. It is then used to analyze how the optimized piston skirt profile investigated in a previous study reduces friction. It was found that the profile is able to maintain a larger amount of lubricant between the lower part of the piston skirt and the cylinder liner during compression stroke, thereby generating more hydrodynamic pressure, instead of asperity contact pressure, to balance the lateral force from piston pin.
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Meng, Z., Ahling, S., and Tian, T., "Study of the Effects of Oil Supply and Piston Skirt Profile on Lubrication Performance in Power Cylinder Systems," SAE Technical Paper 2019-01-2364, 2019, https://doi.org/10.4271/2019-01-2364.Data Sets - Support Documents
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References
- Westerfield , Z. , Totaro , P. , Kim , D. , and Tian , T. An Experimental Study of Piston Skirt Roughness and Profiles on Piston Friction Using the Floating Liner Engine SAE Technical Paper 2016-01-1043 2016 10.4271/2016-01-1043
- Hoshikawa , J. , Kato , K. , Miyamoto , K. , Higashi , H. , and Ito , A. A study of Friction Reduction by ‘Soft Skirt' Piston SAE Technical Paper 2011-01-2120 2011 10.4271/2011-01-2120.
- Littlefair , B. , De la Cruz , M. , Theodossiades , S. , Mills , R. , Howell-Smith , S. , Rahnejat , H. , and Dwyer-Joyce , R. S. , Transient Tribo-Dynamics of Thermo-Elastic Compliant High-Performance Piston Skirts Tribology Letters 53 1 51 70 2014 https://doi.org/10.1007/s11249-013-0243-6
- Totaro , P. , Westerfield , Z. , and Tian , T. Introducing a New Piston Skirt Profile to Reduce Engine Friction SAE Technical Paper 2016-01-1046 2016 10.4271/2016-01-1046
- Bai , D. 2012
- Totaro , P. 2014
- Meng , Z. 2017
- Meng , Z. , Ahling , S. , and Tian , T. Modeling of Oil Transport between Piston Skirt and Cylinder Liner in Internal Combustion Engines SAE Technical Paper 2019-01-0590 2019 10.4271/2019-01- 0590
- Patir , N. , and Cheng , H.S. An Average Flow Model for Determining Effects of Three-dimensional Roughness on Partial Hydrodynamic Lubrication Journal of Lubrication Technology. 100 1 12 17 1978 10.1115/1.3453103
- Elrod , H. G. A Cavitation Algorithm Journal of Lubrication Technology. 103 3 350 354 1981 10.1115/1.3251669
- Johnson , K. L. Contact Mechanics Cambridge University Press 1987
- Zanghi , E. Analysis of Oil Flow Mechanisms in Internal Combustion Engines via High Speed Laser Induced Fluorescence (LIF) Spectroscopy Master's thesis, Massachusetts Institute of Technology 2014
- Zanghi , E. and Tian , T. Development of a High Speed Laser Induced Fluorescence (HSLIF) System in a Single Cylinder Engine for Oil Transport Studies SAE Technical Paper 2016-01-0642 2016 10.4271/2016-01-064