公开(公告)号：US20180072961A1

公开(公告)日：2018-03-15

申请号：US15560035

申请日：2016-03-24

Applicant: IDEMITSU KOSAN CO., LTD.

Inventor： Toshimasa UTAKA ,  Kazushi TAMURA ,  Hideki KAMANO ,  Akira IIJIMA

IPC: C10M169/04

Abstract: Provided are a lubricating oil composition for internal combustion engine capable of preventing a deterioration of the combustion state of a spark-ignition internal combustion engine, specifically, a lubricating oil composition to be used for a spark-ignition internal combustion engine in which a total tension per piston of tensions applied to the piston ring is 100 N or less, the lubricating oil composition being a lubricating oil composition including a base oil, (A) a calcium-based detergent, at least one selected from (B1) a sodium-based additive and (B2) a magnesium-based additive, and (C) an ash-free sulfur-based additive in predetermined contents; a method for producing the lubricating oil composition; a spark-ignition internal combustion engine using the lubricating oil composition; and a method for lubricating the internal combustion engine.

公开(公告)号：US20160304802A1

公开(公告)日：2016-10-20

申请号：US15038662

申请日：2014-11-25

Applicant: IDEMITSU KOSAN CO., LTD.

Inventor： Kazushi TAMURA ,  Toshimasa UTAKA ,  Hideki KAMANO ,  Akira IIJIMA

IPC: C10M169/04

CPC classification number: C10M169/04 ,  C10M163/00 ,  C10M2203/022 ,  C10M2207/026 ,  C10M2207/027 ,  C10M2207/262 ,  C10M2209/084 ,  C10M2215/064 ,  C10M2215/28 ,  C10M2219/068 ,  C10M2223/045 ,  C10M2229/02 ,  C10N2210/01 ,  C10N2210/02 ,  C10N2210/06 ,  C10N2220/022 ,  C10N2230/00 ,  C10N2230/02 ,  C10N2230/52 ,  C10N2230/74 ,  C10N2240/104

Abstract: The lubricating oil composition for spark-ignition internal combustion engine according to the present invention is a lubricating oil composition to be used for a spark-ignition internal combustion engine including a piston having a piston ring, in which a total tension per piston of tensions applied to the piston ring is 30 N or less, the lubricating oil composition being a lubricating oil composition comprising a base oil, (A) an organic metal-based additive containing an alkali metal and/or an alkaline earth metal, and (B) an organic zinc-based additive, wherein a concentration of the component (A) on a basis of the total amount of the lubricating oil composition is 0.15% by mass or less as converted into a metal content; a concentration of the component (B) on a basis of the total amount of the lubricating oil composition is 0.15% by mass or less as converted into a zinc content; the product of the concentration (% by mass) of the component (A) and a base number (mgKOH/g) of the lubricating oil composition is 1.3 or less; the product of the concentration (% by mass) of the component (B) and an acid number (mgKOH/g) of the lubricating oil composition is 1.2 or less; and the lubricating oil composition has a Noack evaporation loss of 10% by mass or more and a kinematic viscosity at 100° C. of 9.3 mm2/s or less. The lubricating oil composition for spark-ignition internal combustion engine according to the present invention is capable of preventing a deterioration of the combustion state of a spark-ignition internal combustion engine.

Abstract translation: 本发明的火花点火式内燃机润滑油组合物是一种用于火花点火式内燃机的润滑油组合物，其包括具有活塞环的活塞，其中每个活塞的总张力施加在其上 活塞环为30N以下，润滑油组合物为含有基油的润滑油组合物，（A）含有碱金属和/或碱土金属的有机金属类添加剂，（B） 有机锌系添加剂，其中，基于所述润滑油组合物的总量，所述成分（A）的浓度为0.15质量％以下。 基于润滑油组合物的总量，组分（B）的浓度为0.15质量％以下，转化为锌含量; 组分（A）的浓度（质量％）和润滑油组合物的碱值（mgKOH / g）的乘积为1.3以下; 组分（B）的浓度（质量％）和润滑油组合物的酸值（mgKOH / g）的乘积为1.2以下; 润滑油组合物的Noack蒸发损失为10质量％以上，100℃下的运动粘度为9.3mm 2 / s以下。 根据本发明的用于火花点火内燃机的润滑油组合物能够防止火花点火式内燃机的燃烧状态的劣化。

公开(公告)号：US20190100713A1

公开(公告)日：2019-04-04

申请号：US16086800

申请日：2017-03-24

Applicant: IDEMITSU KOSAN CO., LTD.

Inventor： Toshimasa UTAKA ,  Kazushi TAMURA ,  Akira IIJIMA

IPC: C10M169/04 ,  C10M125/10 ,  C10M135/10 ,  C10M129/10

Abstract: Provided is a lubricating oil composition for engine equipped with a forced-induction mechanism capable of lowering the frequency of occurrence of LSPI, while using a calcium-based detergent. The lubricating oil composition for engine equipped with a forced-induction mechanism contains a base oil (A), a metal-containing surfactant (B) containing at least a calcium-containing surfactant (b1), and at least one basic compound (C) selected from a metal carbonate, a metal hydroxide, and an amine-based compound, wherein the content of sulfur contained in the metal-containing surfactant (B) is 0.2 mass % or more on the basis of the whole amount of the metal-containing surfactant (B); the content of a calcium atom is 0.08 to 0.20 mass % on the basis of the whole amount of the composition; and a mass ratio of the content of the basic compound (C) and the content of a calcium atom derived from the calcium-containing surfactant (b1) [(content of (C))/(calcium content derived from (b1))] is 2.0 or more.