摘要:
A lubricating oil composition for reducing low-speed pre-ignition events or improving oxidation in a spark-ignited direct injection engine is disclosed. The composition includes a detergent additive which comprises either: an oil-soluble sulfonate including both magnesium and calcium as cations; or an oil-soluble salicylate including both magnesium and calcium as cations.
摘要:
An overbased magnesium sulfonate detergent is made by (A) preparing a mixture of a sulfonic acid or salt with a magnesium oxide, water, a C 1 -C 5 alkanol, a hydrocarbon solvent, and a combination of a polyisobutene succinic anhydride of molecular weight (M w ) 500 to 1500 g mol -1 and a salicylic acid as first and second promoters; and (B) carbonating the mixture with an acidic gas to form the overbased magnesium sulfonate.
摘要:
A marine diesel lubricating oil composition having a TBN from about 5 to about 120 containing a base oil of lubricating viscosity, an overbased alkylaryl C10-40 sulfonate detergent and an overbased isomerized C10-40 normal alpha olefin based phenate detergent, wherein the weight ratio of the overbased sulfonate detergent to the overbased isomerized normal alpha olefin based phenate detergent ranges from 1:9 to 9:1.
摘要:
A lubricating oil composition and method of operating a boosted internal combustion engine. The lubricating oil composition includes greater than 50 wt.% of a base oil, an overbased detergent having a TBN greater than 225 mg KOH/g and a low-based/neutral detergent having a TBN up to 175 mg KOH/g. A total amount of calcium from the overbased and low-based/neutral detergent is greater than 1100 ppm to less than 2400 ppm by weight based on a total weight of the lubricating oil composition. The lubricating oil composition and method may be effective to reduce low-speed pre-ignition events in a boosted internal combustion engine lubricated with the lubricating oil composition relative to commercially available lubricating oil compositions.
摘要:
A lubricating oil composition includes: a lubricating base oil; a component (A) that is a metal detergent having a base value of less than 100 mgKOH/g; a component (B) that is a metal detergent having a base value of 100 mgKOH/g or more; a component (C) that is a tertiary amine represented by a formula (1) below, in which R 1 is a hydrocarbon group having 4 carbon atoms or more, and R 2 and R 3 each are a hydrocarbon group having 4 carbon atoms or less; and a component (D) that is at least one of acid phosphate and acid phosphite.
摘要:
A lubricating oil composition for an internal combustion engine according to the present invention contains a lubricating base oil, (A1) a basic calcium salicylate having a TBN of 200 mgKOH/g or more, (A2) a basic sodium sulfonate having a TBN of 200 mgKOH/g or more and/or a basic calcium sulfonate having a TBN of 50 mgKOH/g or less, (B) a binuclear organic molybdenum compound and/or a trinuclear organic molybdenum compound, and (C) a polyalkyl (meth)acrylate having an SSI of 30 or less, a total content of molybdenum derived from the binuclear and trinuclear organic molybdenum compounds being 0.025 mass% or more relative to the whole amount of the composition and the lubricating oil composition having predetermined values of a high-temperature high-shear viscosity and a NOACK value (250°C, 1 hr).
摘要:
A lubricating oil composition includes: a lubricating base oil; a component (A) that is a metal detergent having a base value of less than 100 mgKOH/g; a component (B) that is a metal detergent having a base value of 100 mgKOH/g or more; a component (C) that is a tertiary amine represented by a formula (1) below,
in which R 1 is a hydrocarbon group having 4 carbon atoms or more, and R 2 and R 3 each are a hydrocarbon group having 4 carbon atoms or less; and a component (D) that is at least one of acid phosphate and acid phosphite.