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Visualization of Oil Behavior when Piston Pin Noise Occurs

Article of Honda R&D Technical Review Vol.23 No.2

Summary

iston pin behavior was measured on occurrence of conspicuous piston pin noise when using a semi-floating support system, and oil behavior around the piston pin was visualized.
Piston pin behavior was measured by the linkage method using a gap sensor. This clarified the behavior of the piston pin using a semi-floating support system when the noise occurred.
Visualization of the oil behavior was performed by the linkage method using optical fiber. Particle images of oil droplets were captured with a high-speed camera. Processing those images with particle tracking velocimetry (PTV) successfully vectorized the oil behavior inside the engine.

Reference

(1) Takiguchi, M., Aoki, Y., Anzai, S.: Relation between Lubricating Condition and Pin Slap Vibration at Pin Boss Bearing, JSAE Proceedings, No. 50-02, p. 5-8 (2002)
(2) Kawano, K., Sue, S., Ishida, H.: Mechanism analysis of piston pin/pin boss bearing impact noise, JSAE Proceedings, No. 148-08, p. 5-10 (2008)
(3) Kamiya, M., Kobayashi, T., Take, K., Takahashi, Y., Mihara, Y., Someya, T.: Measurement of Piston Skirt Oil-film Pressure when Piston Slap Noise Occurs, Honda R&D Technical Review, April, 2007, p. 149-155
(4) Usui, M., Murayama, K., Sato, K., Yoshida, H.: Research in Lubricating Oil Flow and Visual Observation around Piston Ring, JSAE Proceeding, No.7 -06, p. 5-8 (2006)
(5) http://www.nissan-global.com/JP/NEWS/2008/_STORY/081110-03-j.html

Author (organization or company)

Takashi KONDO(Automobile R&D Center)、Hisayuki OHBAYASHI(Honda Foundry Co.,Ltd)

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