自動車用無段変速機トロイダルＣＶＴとトラクションオイルの高圧物性

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タイトル別名
  • Toroidal CVT for Automobile and High Pressure Rheology of Traction Oil.
  • 解説 自動車用無段変速機トロイダルCVTとトラクションオイルの高圧物性
  • カイセツ ジドウシャヨウ ムダン ヘンソクキ トロイダル CVT ト トラクションオイル ノ コウアツ ブッセイ

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抄録

Practical toroidal-type continuously variable transmissions (CVT) for automobile are subject to extremely severe operating conditions, namely, the maximum contact pressure is very high at 3 GPa or higher, the rolling speed exceeds over 30 m/s, and the lubricant temperature goes up over 120°C. The objective of this research is to grasp the traction characteristics of extremely severe EHL (Elastohydrodynamic Lubrication) contact conditions. The bulk moduli of a synthetic traction oil at quasi-static conditions were evaluated using a phase diagram. Next, the EHL traction was measured by a two-disc machine and a four-disc machine. It was verified that the traction coefficients were based on the phase diagram of traction oil.

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