Abstract

With the purposes of making the maintenance interval of continuously variable transmission (CVT) fluid as long as that of automatic transmission (AT) vehicles and of making its use common to AT vehicles, an ester friction modifier and high FW amide were used to develop a fluid that is optimally adjusted to friction characteristics by means of a metallic detergent. This fluid has at least 4 times the longevity of current products with respect to friction characteristics.The initial vehicle quality such as the shift quality of AT vehicles, which is affected by the friction characteristics of a wet clutch transmission, and acceleration smoothness from stop of CVT vehicles are maintained by this new fluid, which has made it is possible to extend the maintenance intervals of CVT vehicles. Also, the extended maintenance schedule has occasioned improved convenience for the user and contributed to reduction in the amount of liquid waste disposal because of the reduced frequency of fluid change. Therefore, it is expected that this new fluid will contribute to the prevention of pollution of the global environment.

References

1. (1) T. Sasaki, I. Ohmori, M. Furumoto, H. Tanaka,: The Development of Automobile Lubricants Based on High-Viscosity Index Base Stock. Honda R&D Technical Review, vol.7, P.123-130 (1995), (Written in Japanese).
2. (2) T. Sasaki, I. Ohmori, M. Furumoto, H. Tanaka,: Development of Automotive Lubricants Based on High-Viscosity Index Base Stock, SAE paper 951028
3. (3) J. Yoshida, T. Nagashima, T. Yamane, M. Kawauchi Y. Hirao: The Effect of Automatic Transmission Fluid on Friction Characteristics of a Wet Clutch, JSAE Paper 9740235 (Written in Japanese).
4. (4) J. Yoshida, T. Nagashima,: Performance Requirements for Belt Drive CVT Fluids, 1998 Tribology of Vehicle Transmissions
5. (5) T. Nagashima, J. Yoshida,: Properties and Performance Requirements for CVT fluids, SAE TOPTEC, May 1998
6. (6) J. Yoshida, T. Nagashima,: Properties and Durability Required for CVT Fluids, 1998 Global Powertrain Congress

Author (organization or company)

• Tomonori YAMANE（Tochigi R&D Center）
• Takashi NAGASHIMA（Tochigi R&D Center）
• Junpei YOSHIDA（Innovative Research Excellence Power Unit & Energy）
• Yasuo HIRAO（Tochigi R&D Center）

Publication Information

Article of Honda R&D Technical Review Vol.12 No.2 (153 - 158)

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Citation Information