LUBRICANT OIL COMPOSITION AND INTERNAL-COMBUSTION-ENGINE FRICTION REDUCTION METHOD
申请人:Idemitsu Kosan Co., Ltd
公开号:EP3279292A1
公开(公告)日:2018-02-07
A lubricating oil composition which exhibits an excellent friction-reducing effect and excellent fuel consumption reducing properties is provided.
The lubricating oil composition includes a lubricating base oil (A), a molybdenum compound (B), and an ashless friction modifier (C), wherein the lubricating oil composition includes a binuclear organic molybdenum compound represented by the following general formula (I) as the molybdenum compound (B), with the content of the binuclear organic molybdenum compound as converted into molybdenum atoms being 0.030 mass% or more and 0.140 mass% or less based on the total amount of the lubricating oil composition; and an ester-based ashless friction modifier (C1) and/or an amine-based ashless friction modifier (C2) as the ashless friction modifier (C), with the total content of the ester-based ashless friction modifier (C1) and the amine-based ashless friction modifier (C2) being more than 0.1 mass% and 1.8 mass% or less based on the total amount of the lubricating oil composition:
in the general formula (I), R1 to R4 each represents a hydrocarbon group having 4 to 22 carbon atoms, R1 to R4 may be the same as or different from each other, and X1 to X4 each represents a sulfur atom or an oxygen atom.
本发明提供了一种润滑油组合物,它具有出色的减摩效果和优异的降低油耗性能。
该润滑油组合物包括润滑基础油 (A)、钼化合物 (B) 和无灰摩擦改进剂 (C),其中润滑油组合物包括由以下通式 (I) 表示的双核有机钼化合物作为钼化合物 (B),双核有机钼化合物转化为钼原子的含量为 0.030 质量%或以上且 0.140质量%或更低;以及作为无灰摩擦改进剂(C)的酯基无灰摩擦改进剂(C1)和/或胺基无灰摩擦改进剂(C2),酯基无灰摩擦改进剂(C1)和胺基无灰摩擦改进剂(C2)的总含量为润滑油组合物总量的0.1质量%以上和1.8质量%以下:
在通式(I)中,R1 至 R4 分别代表具有 4 至 22 个碳原子的烃基;R1 至 R4 可以彼此相同或不同;X1 至 X4 分别代表硫原子或氧原子。