Patent · US Active

Method for lubricating a continuously variable transmission, and a continuously variable transmission

US9725672B2 · kind B2 · utility

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Key dates

Filing dateNov 24, 2010
Grant dateAug 8, 2017
Priority date
Expiry dateMay 14, 2031

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC10N2040/045
  • WIPO fieldBasic materials chemistry
  • WIPO sectorChemistry

Abstract

A lubricating oil composition for a continuously variable transmission contains at a specific content: (A) a mineral oil or PAO having a sulfur content of 0.03 mass % or less and a kinematic viscosity at 100 degrees C. from 1.5 mm2/s to 3 mm2/s; (B) a mineral oil or PAO having a sulfur content of 0.03 mass % or less and a kinematic viscosity at 100 degrees C. from 5.5 mm2/s to 8 mm2/s; (C) PAO having a kinematic viscosity at 100 degrees C. from 30 mm2/s to 400 mm2/s; and (D) a polymethacrylate having a mass average molecular weight of 10000 to 40000, in which the total content of the components (C) and (D) is 19 mass % or more and the lubricating oil composition has a kinematic viscosity at 100 degrees C. from 5.5 mm2/s to 6.5 mm2/s and a kinematic viscosity at −20 degrees C. of 680 mm2/s or less.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.