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Measurement of Piston Secondary Motion Using the New Digital Telemeter

Journal Article
2013-01-1708
ISSN: 1946-3936, e-ISSN: 1946-3944
DOI: https://doi.org/10.4271/2013-01-1708
Published April 08, 2013 by SAE International in United States
Measurement of Piston Secondary Motion Using the New Digital Telemeter
Sector:
Citation: Takahashi, M., Isarai, R., and Hara, H., "Measurement of Piston Secondary Motion Using the New Digital Telemeter," SAE Int. J. Engines 6(1):577-586, 2013, https://doi.org/10.4271/2013-01-1708.
Language: English

Abstract:

The authors have developed a measurement technique using a new digital telemeter which measures the piston secondary motion as ensuring high accuracy while under the operation.
We applied this new digital telemeter to several measurements and analysis on the piston secondary motion that can cause piston noises, and here are some of the results from our measurement. We have confirmed that these piston motions vary by only several tenths of millimeter changes of the piston specifications such as the piston-pin offset and the center of gravity of the piston. As in other cases, we have found that a mere change of pressure in the crankcase or the amount of lubricating oil supplied on the cylinder bore varies the piston motion that may give effect on the piston noises.

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