The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 01, 2022
Filed:
Mar. 22, 2018
Idemitsu Kosan Co., Ltd., Chiyoda-ku, JP;
Hiroshi Oki, Chiba, JP;
IDEMITSU KOSAN CO., LTD., Chiyoda-ku, JP;
Abstract
Provided is a lubricating oil composition containing a base oil (A) and a viscosity index improver (B) and satisfying the following requirements (I) and (II): Requirement (I): a kinematic viscosity at 80° C., Vof the lubricating oil composition is 11.5 mm/s or less; Requirement (II): a ratio [V/T] of a kinematic viscosity at 80° C., V(m/s) to an oil film thickness measured at a sliding speed of 2.0 m/s, a maximum Hertz pressure of 0.8 GPa, and an oil temperature of 80° C., T(nm) of the lubricating oil composition is less than 0.105 ((m/s)/nm). The lubricating oil composition is excellent in fuel saving properties and anti-wear properties even when it is used in a temperature environment of around 80° C. which is assumed to fall within a range where an engine is practically used.