Title:
LUBRICATING OIL COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2018/174126
Kind Code:
A1
Abstract:
A lubricating oil composition that contains a base oil (A) and a viscosity index improver (B) and satisfies the following requirements (I) and (II). The lubricating oil composition has exceptional fuel economy and abrasion resistance even when used in a temperature environment near 80°C, which is assumed to be the practical zone of an engine. Requirement (I): the kinetic viscosity V80 of the lubricating oil composition at 80°C is 11.5 mm2/s or lower. Requirement (II): the ratio [V80/T80] of the kinetic viscosity V80 (m2/s) of the lubricating oil composition at 80°C and the oil film thickness T80 (nm) measured at a slip velocity of 2.0 m/s, a maximum Hertzian pressure of 0.8 GPa, and an oil temperature of 80°C is less than 0.105 ((m2/s)/nm).
Inventors:
OKI HIROSHI (JP)
Application Number:
PCT/JP2018/011281
Publication Date:
September 27, 2018
Filing Date:
March 22, 2018
Export Citation:
Assignee:
IDEMITSU KOSAN CO (JP)
International Classes:
C10M101/02; C10M171/02; C10M169/04; C10N20/00; C10N20/02; C10N20/04; C10N30/00; C10N30/06; C10N40/25
Domestic Patent References:
| WO2017002969A1 | 2017-01-05 | |||
| WO2016043334A1 | 2016-03-24 |
Foreign References:
| JP2011021090A | 2011-02-03 | |||
| JPS61238891A | 1986-10-24 | |||
| JP2011021056A | 2011-02-03 |
Attorney, Agent or Firm:
HIRASAWA, Kenichi et al. (JP)
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