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Evaluation of Cylinder Bore and Cylinder Head Deformations Using Holographic Interferometry
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English
Abstract
In the design of automotive and heavy equipment engines, accurate analysis of factors which influence immediate and long-term effects is essential. Fastener torque, thermal and pressure variations are utilized to evaluate basic sensitivity of the engine to these parameters by measurement of cylinder bore and cylinder head distortions. Holographic interferometry was used to measure the cylinder deformation caused by the applied thermal and mechanical loads. A cast iron V-6 engine was used as the test engine. Influences of bolt torquing, as would occur during initial assembly and/or service were evaluated. Pressure on the cylinder walls was simulated by creating a vacuum in the water jackets of the engine block. The effects of thermal loads were evaluated using a temperature controlled liquid flowing through the water jackets. Incremental steady-state loads were applied to investigate the deformation of the engine at specific points in the operating cycle.
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Citation
Hathaway, R., Turley, J., and Yi-Ho, C., "Evaluation of Cylinder Bore and Cylinder Head Deformations Using Holographic Interferometry," SAE Technical Paper 910433, 1991, https://doi.org/10.4271/910433.Also In
References
- Hathaway, R.B. etal “Cylinder Deflection Analysis: An Evaluation Technique Which Can Lead to Improved Reliability and Efficiency in Small Light Weight I.C. Engines” SAE Technical Paper # 901636 September 1990
- Erf, R.J. Holographic Non-Destructive Testing Academic Press
- Vest, C.M. Holographic Interferometry J. Wiley & Sons 1979
- Taylor, Charles The Internal Combustion Engine in Theory and Practice