Investigation of effects of additive for ATF and test condition on pitting life of gear tooth in the FZG pitting test

Toshihiko Ichihashi, Yutaka Takakura, Susumu Matsumoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The reduction in viscosity of Automatic Transmission Fluids (ATFs) for improving fuel economy results in a reduction in transmission gear fatigue life due to occurring pitting. The aim of this study is to establish a suitable test condition for evaluating differentiation in the gear pitting life between ATFs by using a Forschungsstelle fur Zahnrader und Getriebebau (FZG). In this study FZG gear sets were modified so that gear teeth were misaligned and the contact tooth width was shortened by offset in the direction of the shaft. The fatigue pitting life in response to ATFs under this modified FZG test condition was of the same order as that obtained in the actual transmission test under a severely offset condition. A sulfur-containing additive could play a role on the gear tooth life under severe condition, which was most likely attributed to tribofilm for motion on the gear tooth surface.

Original languageEnglish
Title of host publicationAmerican Society of Mechanical Engineers, Tribology Division, TRIB
Pages225-227
Number of pages3
DOIs
Publication statusPublished - 2011
EventASME/STLE 2011 International Joint Tribology Conference, IJTC 2011 - Los Angeles, CA
Duration: 2011 Oct 242011 Oct 26

Other

OtherASME/STLE 2011 International Joint Tribology Conference, IJTC 2011
CityLos Angeles, CA
Period11/10/2411/10/26

Fingerprint

Gear teeth
Pitting
Fluids
Gears
Fatigue of materials
Fuel economy
Sulfur
Viscosity

ASJC Scopus subject areas

  • Mechanical Engineering
  • Materials Science(all)

Cite this

Ichihashi, T., Takakura, Y., & Matsumoto, S. (2011). Investigation of effects of additive for ATF and test condition on pitting life of gear tooth in the FZG pitting test. In American Society of Mechanical Engineers, Tribology Division, TRIB (pp. 225-227) https://doi.org/10.1115/IJTC2011-61166

Investigation of effects of additive for ATF and test condition on pitting life of gear tooth in the FZG pitting test. / Ichihashi, Toshihiko; Takakura, Yutaka; Matsumoto, Susumu.

American Society of Mechanical Engineers, Tribology Division, TRIB. 2011. p. 225-227.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ichihashi, T, Takakura, Y & Matsumoto, S 2011, Investigation of effects of additive for ATF and test condition on pitting life of gear tooth in the FZG pitting test. in American Society of Mechanical Engineers, Tribology Division, TRIB. pp. 225-227, ASME/STLE 2011 International Joint Tribology Conference, IJTC 2011, Los Angeles, CA, 11/10/24. https://doi.org/10.1115/IJTC2011-61166
Ichihashi T, Takakura Y, Matsumoto S. Investigation of effects of additive for ATF and test condition on pitting life of gear tooth in the FZG pitting test. In American Society of Mechanical Engineers, Tribology Division, TRIB. 2011. p. 225-227 https://doi.org/10.1115/IJTC2011-61166
Ichihashi, Toshihiko ; Takakura, Yutaka ; Matsumoto, Susumu. / Investigation of effects of additive for ATF and test condition on pitting life of gear tooth in the FZG pitting test. American Society of Mechanical Engineers, Tribology Division, TRIB. 2011. pp. 225-227
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