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Durability Upgrading and Frictional Torque Lowering of the Seal Ring Used for Automatic Transmissions
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1992 by SAE International in United States
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In the seal ring used for the rotating portion of the automatic transmission, we have developed a seal ring in which the wear of the ring is reduced to 1/10 under PV-value of 12MPa · m/s and equivalent at PV-value of 30MPa·m/s and also the frictional torque of the rotating portion is reduced to 1/2 when compared with the conventional PTFE seal ring. This has been achieved by means of improvement of the oil pocket's shape, size, and the distance between oil pockets equally spaced on the side surface of the seal ring.
CitationKuroki, T., Abe, Y., Sowa, M., and Kitade, A., "Durability Upgrading and Frictional Torque Lowering of the Seal Ring Used for Automatic Transmissions," SAE Technical Paper 920720, 1992, https://doi.org/10.4271/920720.
- 1989 WARD'S AUTOMOTIVE YEARBOOK pp. 127-130
- Kuroki Toshihiko et al., “Investigation of Leakage Phenomena and Improvement of Sealing Performance of Seal Ring Used for Rotary Shafts of Automatic Transmissions”, SAE PAPER No.910534, 1991.