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Measurement of Piston and Piston Ring Assembly Friction Force
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English
Abstract
A new method for measuring friction has been developed in order to analyze piston and piston ring assembly friction force during engine operation. While this method does not require extensive modification to the piston or cylinder, two extra compression and expansion strokes each are added at the end of the conventional four-stroke cycle. In these measuring strokes, the gas pressure and temperature are maintained at firing levels, and friction force characteristics of the piston and piston ring assembly are measured continuously while the burned gas is compressed and expanded.
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Citation
Goto, T., Aoyama, S., Nagumo, S., Nakajima, Y. et al., "Measurement of Piston and Piston Ring Assembly Friction Force," SAE Technical Paper 851671, 1985, https://doi.org/10.4271/851671.Also In
References
- Furuhama S. et al. “Measurement of Piston Friction Force in a High-speed Diesel Engine,” Proceedings of the Joint Symposium on Internal Combustion Engines
- Furuhama S. et al. “Measurement of Piston Frictional Force in Actual Operating Diesel Engine,” SAE Paper 790855
- Urus H. M. et al. “Measurement of Piston and Ring Assembly Friction Instantaneous IMEP Method,” SAE Paper 830416