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Measurement of Cylinder Bore Deformation During Actual Operating Engines
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English
Abstract
One of the phenomena accompanying the lightweight/compact/high power output feature of engines is the cylinder bore deformation, which may readily cause increased oil consumption, gas leakage, unusual wear, scuffing, etc.. The authors have had experiences that piston rings had generated contact failure during engine operation (1)*. Such deformation is generated as a combination of the static deformation due to head bolt tightening, crankshaft installation, etc., and the deformation by the operating factors; thermal load and combustion pressure. Countermeasure of design have been made for the former (2)*, and prediction of the deformation during actual operating have been tried using FEM analysis, etc. for the latter (3)*. Therefore, the accurate measurement result have been required strongly, for a long time. But it could not be realized in the past.
In this study, the unique and special method has been developed in order to measure the whole cylinder bore shape directly from a piston ring land under the operation upto high-speed and high-load.
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Fujimoto, H., Yoshihara, Y., Goto, T., and Furuhama, S., "Measurement of Cylinder Bore Deformation During Actual Operating Engines," SAE Technical Paper 910042, 1991, https://doi.org/10.4271/910042.Also In
References
- Fujimoto H. Furuhama S. Goto T. “Measurement of Cylinder Bore Deformation by Means of a Turning Piston With a Gap Sensor During Engine Operation” Trans. of JSME(in Japanese) 56 523 89 0376A 1990
- Loenne K. Ziemba R. “The GOETZE Cylinder Distortion Measurement System and the Possibilities of Reducing Cylinder Distortions” SAE Paper, 880142 1988
- Li C. “Thermal and Mechanical Behavior of an L-4 Engine” SAE Paper, 881149 1988