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Development of Metal Pushing V-belt for Continuously Variable Transmission for 2L Class Vehicle

Article of Honda R&D Technical Review Vol.16 No.2

Summary

Honda presently mass produces a metal pushing V-belt to enable a compact CVT layout in a 1.5L class vehicle. The project discussed in this paper based itself on the technologies developed for mass production of the 1.5L class belt, and employed dynamic analysis of slack string elements and study of ATF extreme pressure lubricant oil films using measurements of electrical resistance to develop a metal pushing V-belt enabling a compact CVT layout in a 2L class vehicle.
The size of CVTs has conventionally been determined by the pitch radius of the V-belt. To increase the torque capacity of the CVT, it was formerly necessary to increase the pitch radius of the belt in order to reduce the belt load. In the newly designed belt, reduction of the pitch radius has enabled the distance between the shafts to be reduced, hence reducing the size of the CVT. The newly developed belt achieves a maximum transmitted power of 150 kW with 170 mm between the shafts, and enables a more compact CVT layout.

Reference

(1) Yagasaki, T., Aoyama, H., Toshihiro, S., Ishii, K., Okada, Y., Arikawa, M.: Development of Metal Pushing V-Belt for Continuously Variable Transmission, Honda R&D Technical Review, Vol. 14, No. 1, p. 181-190
(2) Ishii, H., Yagasaki, T., Akagi, H.: Evaluation of giga-cycle fatigue properties of some maraging steels by intermittent ultrasonic fatigue testing,Proceedings of the International Conference on Fatigue in the Very High Cycle Regime, p. 89-96 (2001)
(3) Evaluation method for inclusions in maraging steel, Japan Patent P3345367
(4) Process for producing maragingsteel, United States Patent US 6, 309, 474 B1
(5) Yagasaki, T., Kanehara, S.: Development of Metal Pushing V-belt for Continuously Variable Transmission, FISITA 2004 World Automotive Congress Barcelona, F2004F384 (2004)

Author (organization or company)

Tooru YAGASAKI(Tochigi R&D Center)、Hideaki AOYAMA(Tochigi R&D Center)、Motonori OHNUKI(Tochigi R&D Center)、Yoshinari OKADA(Tochigi R&D Center)、Ryuhei KATAOKA(Tochigi R&D Center)

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