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Durability Investigation of Cast Iron Cap Inserts in an Aluminum Bedplate of a Turbocharged 2.2L ln-Line-4 Gasoline Engine
Technical Paper
2009-01-0079
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper presents a study on the durability of cast iron cap inserts in an aluminum bedplate of a turbocharged 2.2L gasoline passenger car prototype engine under full load. This engine component was chosen for analysis as it is an element of essential importance in overall powertrain structural integrity especially for an engine with higher peak cylinder pressures due to forced induction engine operating condition.
A Finite Element Method (FEM) analysis was carried out to investigate the durability of various cap insert designs. Cap inserts under full load can induce high stress regions in the model, which may indicate likely failure areas on the component. Iterative simulations were performed to measure and characterize both the tensile and compressive stress regions in different cap insert designs using the combined Thermal, Assembly and Firing conditions of the engine. A Fatigue Safety Factor algorithm of the stress results was then built across all relevent crank angles using the Modified Goodman criterion to identify locations of low durability for bedplate design improvement.
Additionally, a comparative analysis using a higher grade cap insert material was performed to study the influence of material strength properties on component durability. The abovementioned FEM activity and supporting analysis results assisted crankcase designers in better understanding how to optimize the turbocharged engine cap insert component whilst at the same time preventing possible bedplate failure.
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Authors
Citation
Abdullah, W. and Mansor, A., "Durability Investigation of Cast Iron Cap Inserts in an Aluminum Bedplate of a Turbocharged 2.2L ln-Line-4 Gasoline Engine," SAE Technical Paper 2009-01-0079, 2009, https://doi.org/10.4271/2009-01-0079.Also In
References
- HEYWOOD, John B. 'Internal Combustion Engine Fundamentals'
- YAMANISHI, Yuji TSUTSUI, Tadayuki ISHII, Kei "Research on Sintered Bearing Cap Material with Excellent Strength and Machinability' Hitachi Powdered Metals Technical Report 1 2002
- User Guide, Ricardo Software 2002
- CARDEN, Phil BELL, David ZUHDI, Ahmad Naji NIK ABDUL AZIZ, Fadhlan '4 versus 8 Counterweights for an 14 Gasoline Engine Crankshaft - Analytical Comparison' SAE World Congress 2008
- NEWTON, STEEDS GARRETT, T. K., 'The Motor Vehicle' Twelfth Edition