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Thermoelastic Behavior of an Aluminum Diesel Engine Piston
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English
Abstract
A three-dimensional finite-element model was developed for the diesel-engine piston. The model, which consists of a half section piston to accommodate the eccentric bowl in the piston head, is used to calculate operating temperatures and the corresponding thermal expansion, skirt flexibility, and operating stresses due to thermal and mechanical loads. The accuracy of the model was verified by using temperature data published in the literature, skirt thermal expansion data measured by the piston supplier, and skirt flexibility data measured in GMR.
A technique to analyze the skirt-to-bore interaction was also developed. This includes calculations of the piston translation and rotation, skirt deformation, as well as the skirt-to-bore contact area and contact force under operating conditions. The analytical tool developed in this study was demonstrated to be useful for piston design.
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Topic
Citation
Li, C., "Thermoelastic Behavior of an Aluminum Diesel Engine Piston," SAE Technical Paper 860163, 1986, https://doi.org/10.4271/860163.Also In
References
- Li, C. H. “Piston Thermal Distortion and Friction Considerations,” SAE Paper 820086 1982
- MacNeal, R. H. “The NASTRAN Theoretical Manual,” NASA SP-221 (01) 1972
- Furuhama, S. Suzuki, H. “Temperature Distribution of Piston Rings and Piston in High Speed Diesel Engine,” Bulletin of the JSME 22 174 1788 1795 1979
- Murty, K. G. “Note on a Bard-Type Scheme for Solving the Complementarity Problems,” Opsearch 11 123 130 1974
- Oh, K. P. “The Numerical Solution of Dynamically Loaded Elastohydrodynamic Contacts as a Non-Linear Complementary Problem,” presented at the 1983 Joint ASLE/ASME Lubrication Conference Hartford, Conn. October 1983
- Oh, K. P. Li, C. H. “Elastohydrodynamic Lubrication of Piston Skirts,”