申请人:Nippon Oil Corporation
公开号:EP1712606A1
公开(公告)日:2006-10-18
Low sulfur lubricating oil compositions are provided which are extremely excellent in anti-wear properties for the valve train system of an internal combustion engine and are also excellent in long-drain properties, and thus is suitable for used in an internal combustion engine. The lubricating oil compositions comprises a lubricating base oil, (A) a specific alkali metal or alkaline earth metal salicylate and/or an overbased or basic salt of the salicylate, (B) a phosphorus-containing anti-wear agent, (C) an ashless dispersant, and (D) an ashless anti-oxidant, as the essential components, and contains boron in an amount of 0.01 to 0.15 percent by mass and sulfur in a total amount of 0.3 percent by mass or less, based on the total mass of the composition.
本发明提供的低硫润滑油组合物对内燃机气门机构系统具有极佳的抗磨损性能,同时还具有极佳的长滤油性能,因此适用于内燃机。该润滑油组合物由润滑基础油、(A) 特定碱金属或碱土金属水杨酸盐和/或该水杨酸盐的过基或碱性盐、(B) 含磷抗磨剂、(C) 无灰分散剂和 (D) 无灰抗氧化剂作为基本成分组成,并含有按组合物总质量计为 0.01% 至 0.15% 的硼和总质量为 0.3% 或以下的硫。