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Study of Durability Prediction Considering Wear Properties for Multiple Plate Clutches

Article of Honda R&D Technical Review Vol.18 No.2

Summary

To increase the durability of multiple-plate clutches used in automatic transmissions, attention was focused on the wear history of the facing material. Measurements have confirmed that correlations can be observed between initial wear and disk contact pressure when the clutch is engaged, and between steady wear and plate temperature. Next, simulation technology was developed to quantify the disk contact pressure and plate temperature. When simulated contact pressure distribution and temperature distribution were used to establish correlations with durability wear, good proportional relationships were found in both cases. It was also found that when clutch specifications and driving conditions were varied, the gradient of the correction also varied, but the correlation remained proportional so long as the same facing material was used. The gradient was ranked as a wear property peculiar to the facing material. By determining the wear property of the facing material, it was possible for the first time to predict wear condition in a test of the clutch as an independent part, for any arbitrary set of clutch specifications and driving conditions.

Reference

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(2) Uchida, Y., Miyamoto, O., Otani, T., Maruyama, T., Sakai, K., Tanimoto, S.: Development of New Compact 4-speed Automatic Transmission for Honda LIFE, Honda R&D Technical Review, Vol. 16, No. 2, p. 79-86
(3) Inoue, M., Arai, Y., Azegami, T., Hirao, Y.: Research on Reduction of Unusual Noise in Wet Multiple Disk Clutch for 4WD, Honda R&D Technical Review, Vol. 15, No. 2, p. 133-138
(4) Kato, Y., Akasaka, R., Chiba, N., Mori, Y.: Analysis on the Friction Characteristics of a Paper-Based Facing for a Wet Clutch of an Automatic Transmission, Tribologist, Vol. 39, No. 12, p. 71-78 (1994)
(5) Natsumeda, S.: On the Engagement Mechanism of a Friction Plate, NSK Technical Journal, No. 655, p. 32-38 (1993)
(6) Haj-Fraj, A., Pfeiffer, F.: Modeling of Wet Clutches in Automatic Transmissions, The 2nd International Conference on Recent Advances in Mechatronics, p. 9-15 (1999)
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(8) Miura, T., Sekine, N., Azegami, T., Murakami, Y.: Friction Property of Segment Bonded-type Wet Clutches for Automatic Transmission, HONDA R&D Technical Review, Vol. 10, p. 142-149

Author (organization or company)

Toshihiro SAITO(Automobile R&D Center)、Tamotsu KOTEGAWA(Automobile R&D Center)、Yoshiteru MATSUURA(Automobile R&D Center)、Seiichi TANAKA(Automobile R&D Center)、Kimikazu OHTSUKI (Automobile R&D Center)

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