Next Generation High Performance ATF for Slip-Controlled Automatic Transmission

Paper #:
  • 972927

Published:
  • 1997-10-01
Citation:
Kugimiya, T., Yoshimura, N., Kuribayashi, T., Mitsui, J. et al., "Next Generation High Performance ATF for Slip-Controlled Automatic Transmission," SAE Technical Paper 972927, 1997, https://doi.org/10.4271/972927.
Pages:
12
Abstract:
A slip-controlled lock-up clutch system Is very efficient in improving the fuel economy of automatic transmission (AT) equipped vehicles. However, a special automatic transmission fluid (ATF) which combines an anti-shudder property with high torque capacity is required for this system.In this study, we established additive technology for ATF having a sufficient anti-shudder property and high torque capacity. Based on the technology, new ATF: ATF-T4 was developed. It was confirmed in actual AT tests that ATF-T4 has excellent anti-shudder durability and high torque capacity. Furthermore, ATF-T4 has good SAE No. 2 friction characteristics, oxidation stability, compatibility with materials (elastomers, nylons, etc.) and viscosity at low temperatures.
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