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:
Jul. 30, 2024
Filed:
Jun. 29, 2022
Eneos Corporation, Tokyo, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Yohei Susukida, Tokyo, JP;
Takahiro Fukumizu, Aichi-ken, JP;
Takatoshi Shinyoshi, Aichi-ken, JP;
Daisuke Tokozakura, Aichi-ken, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Aichi-Ken, JP;
ENEOS CORPORATION, Tokyo, JP;
Abstract
A lubricating oil composition including: a lubricating base oil; (A) a poly(meth)acrylate having a weight average molecular weight of no more than 50,000, in an amount of 2 to 10 mass %; (B) a phosphite ester of the general formula (1) in an amount of 0.01 to 0.06 mass % in terms of P; (C) a thiadiazole compound in an amount of 0.01 to 0.2 mass %; and (D) a Ca salicylate detergent in an amount of 0.005 to 0.03 mass % in terms of Ca, wherein the lubricating oil composition has a kinematic viscosity at 40° C. of 4.0 to 20.0 mm/s, and a kinematic viscosity at 100° C. of 1.8 to 5.2 mm/s; and has a ratio [S]/[P] of 2.2 to 4.0, wherein the [S] represents a sulfur content, and the [P] represents a phosphorus content: wherein Rand Rare each independently a group having 5 to 20 carbons represented by the general formula (2); and wherein Ris a C2-17 linear chain hydrocarbon group, and Ris a C2-17 linear chain hydrocarbon group.