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发明公开
CN108848672A 用于搭载增压机构的发动机的润滑油组合物、使用该润滑油组合物的搭载增压机构的发动机中的低速早期点火的抑制方法、和该润滑油组合物的制造方法 有权

用于搭载增压机构的发动机的润滑油组合物、使用该润滑油组合物的搭载增压机构的发动机中的低速早期点火的抑制方法、和该润滑油组合物的制造方法
摘要：
提供在使用钙系清净剂的同时能够降低LSPI的发生频率的用于搭载增压机构的发动机的润滑油组合物。用于搭载增压机构的发动机的润滑油组合物，其含有：基础油(A)、至少包含含钙表面活性剂(b1)的含金属表面活性剂(B)、以及选自金属碳酸盐、金属氢氧化物、和胺系化合物中的至少1种碱性化合物(C)，前述含金属表面活性剂(B)中包含的硫的含量以含金属表面活性剂(B)总量为基准计为0.2质量%以上，钙原子的含量以组合物总量为基准计为0.08~0.20质量%，前述碱性化合物(C)与源自前述含钙表面活性剂(b1)的钙原子的含量的质量比[(C)的含量/源自(b1)的钙含量]为2.0以上。
摘要（英）：

Provided is a lubricating oil composition for an engine equipped with a supercharging mechanism, whereby the incidence of LSPI can be reduced despite the use of a calcium-based cleaning agent. A lubricating oil composition for an engine equipped with a supercharging mechanism, containing: a base oil (A); a metal-containing surfactant (B) including at least a calcium-containing surfactant (b1); and at least one type of basic compound (C) selected from a metal carbonate, a metal hydroxide, and an amine-based compound; the content of sulfur included in the metal-containing surfactant (B) being 0.2% by mass or greater with respect to the entire quantity of the metal-containing surfactant (B), the content of calcium atoms being 0.08-0.20% by mass with respect to the entire quantity of the composition, and the mass ratio (content of (C)/content of calcium originating from (b1)) of the basic compound (C) and the content of calcium atoms originating from the calcium-containing surfactant (b1) being 2.0 or greater.

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