This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Stress Analysis on the PistonPin Boss for Internal Combustion Engine Considering the Hydrodynamic Oil Film Pressure
Annotation ability available
Sector:
Language:
English
Abstract
The occurrence of pin boss cracks has become more and more frequent as engine specific power and pcp gets higher on modern engines. The reproduction of these cracks in laboratory is only possible with hydraulic pulsators which allow the presence of oil between the piston pin and piston pin bore. This finding reveals the fact that the the hydrodynamic oil film pressure plays an important role on the piston pin boss crack generation and must be taken into account as boundary condition in any stress analysis which is done on the piston.
In this work the piston pin and piston pin boss are simulated as if they were a hydrodynamic sliding bearing. The simulation is done by a computer program that solves the 2D Reynold Equation under dynamic loading. The hydrodynamic pressure field is then used for a 3D FEA of the piston. Experimental measurements were done to confirm the results.
Recommended Content
| Technical Paper | Lightweight Pistons |
| Technical Paper | Two-Ring Piston Development |
| Journal Article | Crankshaft Peak Firing Pressure Bearing Capability Enhancement |
Authors
Topic
Citation
de Toledo Cullen, J., Júnior, D., and Leites, J., "Stress Analysis on the PistonPin Boss for Internal Combustion Engine Considering the Hydrodynamic Oil Film Pressure," SAE Technical Paper 890138, 1989, https://doi.org/10.4271/890138.Also In
References
- LEITES J.M.M. DUARTE D. JR. CULLEN J.A.T. “Análise de Tensões do Cubo de um Pistão para Motor de Combustão Interna Considerando-se a Formação de um Filme Hidrodinâmico de Óleo” IV SIMEA Simpósio de Engenharia Automotiva Sao Paulo, Brasil 1987
- CULLEN J.A.T. MAHRUS D. MATSUO E. “Tendências no Desenvolvimento de Pistões para Motores de Combustão Interna” VII COBEM Congresso Brasileiro de Engenharia Mecânica Uberlândia, M.G., Brasil 1983
- DUARTE D. JR. “Modelagem Matemática e Simulação em Mancais Hidrodinâmicos” tese de doutorado apresentada à Escola Politecnica da Universidade de São Paulo São Paulo, Brasil 1987
- GOENKA P.K. “Dynamic Loaded Journal Bearings: Finite Element Analysis” Journal of Tribology ASME/ASLE. Joint Lubrication Conference Hartford, Conn., USA 1984