The lubricating oil composition for gearless drive mechanisms

Japanese Patent JP5968273

B2

The present invention provides a lubricating oil composition for a continuously variable transmission having a viscosity that is low enough to exhibit fuel saving properties but maintaining the viscosity required for a lubricating oil composition through the period of use in a system and also a higher metal-to-metal friction coefficient to ensure a high power transmitting capacity and providing a wet clutch friction characteristics and anti-shudder properties required for a transmission as well as having a low traction coefficient to achieve further improved fuel saving properties. The composition comprises a base oil having been adjusted so that the product (EC×V40) of the mass percent (EC (mass%)) of a saturated cyclic component on the total base oil mass basis and the 40°C kinematic viscosity (V40 (mm 2 /s)) is 500 or less and the 100°C kinematic viscosity is from 3.6 to 4.1 mm 2 /s, (B) a phosphorus compound, (C) a calcium salicylate and/or a calcium sulfonate, (D) a boron-modified ashless dispersant in an amount of 0.001 to 0.008 percent by mass as boron, and (E) a friction modifier, each in a specific amount, the lubricating oil composition having a 100°C kinematic viscosity of 5.2 to 5.6 mm 2 /s and a viscosity index of 165 or greater.

Yasuyuki Onumata
Noriko Iris
Takahiro Fukumizu
Minoru Yamashita
Hitoshi Ogawa
Nishinoen Junichi

JP2013150126A

August 10, 2016

July 19, 2013

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jx energy corporation
TOYOTA JIDOSHA KABUSHIKI KAISHA

C10M163/00

JP2010037421A
JP2000109875A
JP2004155873A

Junyuki Morita
Hiroyuki Morita

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