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Prediction Method of Surface Pressure against Gasket in Consideration of Creep on Cylinder Head in Air-Cooled Engines
Technical Paper
2012-32-0104
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A method was designed to predict the gasket surface pressure in consideration of creep which occurs on the surface of the gasket side of the cylinder head in air-cooled engines. Creep caused by heat can cause major deformation on the gasket side of the cylinder head in air-cooled engines, which may result in combustion gas leaking from between the cylinder and cylinder head. Until now, there have been no reports of methods to accurately predict phenomena relating to this deformation in the initial stage of engine design.
This study combined values of strain and temperature occurring on the gasket side of the cylinder head, obtained through FEM analysis of steady heat transfer and thermal stress, with unit test results showing the domains in which the influence of the creep is critical or not. This information was used to design a method to determine whether or not an engine's specifications fell into a domain in which creep would have an effect, and predict surface pressure. High correlation between the prediction results from this method and the results of testing on actual engines was confirmed. As a result, it was verified that this prediction method improved efficiencies in engine development procedures.
Authors
Citation
Ono, N., Sugano, M., Fukatsu, A., and Fujiwara, H., "Prediction Method of Surface Pressure against Gasket in Consideration of Creep on Cylinder Head in Air-Cooled Engines," SAE Technical Paper 2012-32-0104, 2012, https://doi.org/10.4271/2012-32-0104.Also In
References
- Fujii, R. Ono, T. Kamino, K. Water Flow, Heat Transfer and Stress Analysis of the Engine Cylinder Head Toyota, Technical Review 47 1 102 107
- Takahashi, T. Nagayoshi, T. Kumano, M. Sasaki, K. “Thermal Plastic-elastic Creep Analysis of Engine Cylinder Head,” SAE Technical Paper 2002-01-0585 2002 10.4271/2002-01-0585
- Ishigaki, T. Kitagawa, J. Tanaka, A. New Evaluation Method for Metal Head Gasket Honda R&D Technical Review 5 33 42 1993