Title:
LUBRICATING OIL COMPOSITION FOR CONTINUOUSLY VARIABLE TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2014/013975
Kind Code:
A1
Abstract:
Provided is a lubricating oil composition for a continuously variable transmission, said composition exhibiting a low viscosity whilst maintaining the viscosity required of the lubricating oil composition throughout a period of use in a mechanism, and maintaining a high friction coefficient between metals so as to ensure a high power-transmitting force provide the wet clutch friction characteristics and the shudder prevention properties required in a transmission. The composition also achieves improved fuel economy due to a low traction coefficient. In the composition, (B) a phosphorus compound, (C) a calcium salicylate and/or a calcium sulfonate, (D) a boron-modified ashless dispersant, and (E) a friction regulating agent are included, each at a specified amount, in a base-oil that has been adjusted so that the product (ECxV40) of the mass percent (EC(mass%)) of a saturated cyclic component, as based on the total base-oil mass, and the kinematic viscosity (V40(mm2/s)) at 40°C is equal to or less than 500, and the kinetic viscosity at 100°C is 3.6-4.1mm2/s. The lubricating oil composition has a kinematic viscosity at 100°C of 5.2-5.6mm2/s and a viscosity index of equal to or greater than 165.
Inventors:
ONUMATA YASUSHI (JP)
AYAME NORIKO (JP)
FUKUMIZU TAKAHIRO (JP)
YAMASHITA MINORU (JP)
OGAWA MASASHI (JP)
NISHINOSONO JYUNICHI (JP)
AYAME NORIKO (JP)
FUKUMIZU TAKAHIRO (JP)
YAMASHITA MINORU (JP)
OGAWA MASASHI (JP)
NISHINOSONO JYUNICHI (JP)
Application Number:
PCT/JP2013/069266
Publication Date:
January 23, 2014
Filing Date:
July 16, 2013
Export Citation:
Assignee:
JX NIPPON OIL & ENERGY CORP (JP)
International Classes:
C10M169/04; C10M129/76; C10M133/16; C10M137/02; C10M139/00; C10M159/22; C10M159/24; C10N20/02; C10N30/00; C10N30/02; C10N30/06; C10N40/04
Foreign References:
| JP2006249408A | 2006-09-21 | |||
| JP2000109875A | 2000-04-18 | |||
| JP2003113391A | 2003-04-18 | |||
| JP2009096925A | 2009-05-07 | |||
| JPS428013B1 | ||||
| JPS428014B1 | ||||
| JPS5152381A | 1976-05-08 | |||
| JPS51130408A | 1976-11-12 |
Other References:
See also references of EP 2876152A4
Attorney, Agent or Firm:
MORITA, NOBUYUKI (JP)
Yoriyuki Morita (JP)
Yoriyuki Morita (JP)
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