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Technique for Prediction of Automotive Transmission Lubrication Performance

Article of Honda R&D Technical Review Vol.25 No.2

Summary

A technique was created for rapidly and accurately predicting oil flow within a transmission.
This research employs the finite difference method to perform analysis, and handles wall boundaries by the method of assigning boundary information to cells and reproducing the object shape. This enabled the gear rotation and engagement that shape oil flows to be handled more readily, and also reduced the calculation cost.
This analytical technique was applied to a manual transmission, and the results show that the calculation of oil flows that takes approximately 26 days by the conventional technique was shortened to approximately four days. In terms of accuracy, it was further confirmed that the technique also enabled prediction of the state of lubrication in an actual transmission.

Reference

(1) Li, L., Versteeg, H., Hargrave, G., Potter, T., Halse, C.: Numerical Investigation on Fluid Flow of Gear Lubrication, SAE Int. J. Fuels Lubr., Vol. 1, Issue 1, p. 1056-1062, (2009)
(2) Moshammer, T., Mayr, F., Kargl, K., Honeger, C.: Simulation of Oil Flow in Gear Box Housing, SAE Technical Paper, 2006-01-1574, (2006)
(3) Muto, K., Sakai, I., Ozaki, N.: Prediction of the Fluid Resistance in Stirred Fluid Using Particle Method, JSAE Annual Congress (Spring), 352-20095482, (2009)
(4) Hirt, C. W., Sicilian, J. M.: A Porosity Technique for the Definition of Obstacles in Rectangular Cell Meshes, International Conference on Numerical Ship Hydrodynamics, 4th, p. 450-468, (1985)
(5) Hirt, C. W., Nichols, B. D.: Volume of Fluid (VOF) Method for the Dynamics of Free Boundaries, Journal of Computational Physics, Vol. 39, p.201-225, (1981)
(6) Derksen, J., Van den Akker, H. E. A.: Large Eddy Simulations on the Flow Driven by a Rushton Turbine, AIChE Journal, Vol. 45,No, 2, p.209-221, (1999)
(7) Visualization Society of Japan: PIV Handbook, 328p, Morikita Publishing Co., Ltd. , (2002)
(8) Nishino, K.: Fukuzatsu Ranryu no Zenba Keisoku - Ranryu Moderu Keisan tono Hikaku ni Mukete -, Saikin no Kagaku Kougaku 57 [Ryushi / Ryutai Kaiseki, Suuchi Shimyureeshon no Tenbou to Jissen Jirei] Kagaku Kogakkai Hen, p.24-36, (2007) (in Japanese)

Author (organization or company)

Daiki SAEGUSA(Automobile R&D Center)、Shinji KAWAI(Automobile R&D Center)

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