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A Numerical Model of Piston Secondary Motion and Piston Slap in Partially Flooded Elastohydrodynamic Skirt Lubrication
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English
Abstract
This paper presents a numerical model of the rotational and lateral dynamics of the piston (secondary motion) and piston slap in mixed lubrication. Piston dynamic behavior, frictional and impact forces are predicted as functions of crank angle. The model considers piston skirt surface waviness, roughness, skirt profile, thermal and mechanical deformations. The model considers partially-flooded skirt and calculates the pressure distributions and friction in the piston skirt region for both hydrodynamic and boundary lubrication. Model predictions are compared with measurements of piston position using gap sensors in a single-cylinder engine and the comparison between theory and measurement shows remarkable agreement.
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Authors
- Victor W. Wong - Massachusetts Institute of Technology
- Tian Tian - Massachusetts Institute of Technology
- Hua Lang - Massachusetts Institute of Technology
- James P. Ryan - Massachusetts Institute of Technology
- Yoshiki Sekiya - Nissan Motor Co.
- Yoichi Kobayashi - Nissan Motor Co.
- Shunichi Aoyama - Nissan Motor Co.
Citation
Wong, V., Tian, T., Lang, H., Ryan, J. et al., "A Numerical Model of Piston Secondary Motion and Piston Slap in Partially Flooded Elastohydrodynamic Skirt Lubrication," SAE Technical Paper 940696, 1994, https://doi.org/10.4271/940696.Also In
New Developments in Engine Design and Engine Component Technology
Number: SP-1017; Published: 1994-03-01
Number: SP-1017; Published: 1994-03-01
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