8 results about "Zinc dithiophosphate" patented technology

This invention proposes a lubricating oil composition for a four-stroke engine specifically designed for unmanned aerial vehicles (UAVs) and its preparation method. The lubricating oil composition for a four-stroke engine of this invention comprises the following components: (A) a nitrogen-containing organoboron compound; (B) an alkyl diphenylamine; (C) polyisobutylene succinimide; (D) sulfonates and / or sulfurized alkylphenol salts; (E) zinc dialkyl dithiophosphate; (F) dialkyl dithiocarbamate; (G) polymethyl methacrylate; and (H) a base oil in a major amount. The structure of the nitrogen-containing organoboron compound is shown in formula (I) and / or formula (II), with the definitions of each group provided in the specification. The lubricating oil composition for a four-stroke UAV engine of this invention exhibits excellent extreme pressure anti-wear, anti-oxidation, and detergency properties, effectively suppressing the increased wear caused by the high power-to-weight ratio and harsh lubrication conditions of four-stroke UAV engines.

The invention relates to the technical field of lubricating oil, in particular to marine four-stroke methanol engine lubricating oil and a preparation method and application thereof. The marine four-stroke methanol engine lubricating oil is prepared from the following components in parts by weight: 80 to 95 parts of mineral oil, 1 to 5 parts of salicylate, 0 to 2.5 parts of sulfurized alkyl phenate, 3.5 to 4.5 parts of succinimide, 0.5 to 1.2 parts of zinc dioctyl dithiophosphate, 0.1 to 0.5 part of zinc butyl octyl dithiophosphate, 0 to 0.5 part of amine type antioxidant and 0.01 to 0.1 part of anti-foaming agent. The low-ash-content alkali-retaining agent has the advantages of being good in alkali-retaining performance, oxidation resistance and corrosion resistance and low in ash content.

A lubricating oil for hybrid engine includes a major amount of an oil of lubricating viscosity; a boron-containing compound in an amount to provide 50 to 300 ppm of boron to lubricating oil composition; an overbased calcium salicylate or a mixture of an overbased calcium sulfonate and overbased calcium salicylate individually having a total base number of greater than 150 mg KOH / g, measured by the method of ASTM D-2896, present in an amount that provides 800 ppm to 1800 ppm of calcium to the lubricating oil composition; zinc dithiophosphate (ZnDTP) in an amount to bring from 100 to 800 ppm of phosphorus to the lubricating oil composition; and a non-dispersant comb polymethacrylate (PMA) viscosity index improver (VII). The boron-containing compound includes a borated dispersant. The KV at 100° C. of the lubricating oil composition is from 6 cSt to 8.5 cSt, the KV at 40° C. of the lubricating oil composition is from 25 cSt to 35 cSt, and the VI of the lubricating oil composition is greater than 200.

A lubricating oil composition contains a base oil (A), a zinc dithiophosphate (B), and a sarcosine compound (C), the composition having a content of the sarcosine compound (C) of more than 0.05% by mass and 0.40% by mass or less based on the entire amount of the lubricating oil composition, and satisfying requirement (α) or (β):Requirement (α): when the content of the sarcosine compound (C) is more than 0.05% by mass and less than 0.20% by mass based on the lubricating oil composition, one or more phosphorus compounds (D) selected from an acidic phosphoric acid ester (D1) and an amine salt thereof (D2) are optionally contained;Requirement (β): when the content of the sarcosine compound (C) is 0.20% to 0.40% by mass based on the lubricating oil composition, the phosphorus compound (D) is contained in an amount less than 0.50% by mass based on the lubricating oil composition.

This invention provides a gasoline engine lubricating oil composition and its preparation method. The gasoline engine lubricating oil composition of this invention comprises the following components: (A) a nitrogen-containing organoboron compound; (B) an alkyl diphenylamine; (C) polyisobutylene succinimide; (D) a sulfonate and / or a sulfurized alkylphenol salt; (E) zinc dihydrodithiophosphate; (F) an organomolybdenum compound; (G) an ethylene-propylene copolymer; and (H) a base oil in a major amount. The structure of the nitrogen-containing organoboron compound is shown in formula (I) and / or formula (II), with the definitions of each group provided in the specification. The gasoline engine lubricating oil composition of this invention exhibits excellent antioxidant, detergency, and dispersing properties, while also demonstrating good anti-wear properties under extreme pressure and lean-oil friction conditions, effectively suppressing engine wear caused by frequent start-stop cycles in hybrid electric vehicles.

This invention relates to a method for reducing abnormal combustion events during engine operation of a hydrogen-fired internal combustion engine (HICE). The method includes the steps of: a) providing the HICE with a lubricating oil composition comprising or a mixture of the following components: i) a base oil having a viscosity KV100 of less than or equal to 12 cSt and comprising more than 50% by weight of the composition, and containing Group I, Group II, Group III, Group IV base oils, or combinations thereof; ii) a super-alkaline magnesium detergent comprising super-alkaline magnesium salicylate, super-alkaline magnesium sulfonate, super-alkaline magnesium phenolate, or combinations thereof, having a total base number (KOH / g) greater than or equal to 9 and less than or equal to 500, and containing at a treatment level providing total magnesium between 100 and 5000 ppm by weight; iii) The super-alkaline metal-containing detergent comprises a super-alkaline metal salicylate detergent, a super-alkaline metal phenolate detergent, or a combination thereof, having a total base number (KOH / g) greater than or equal to 9 and less than or equal to 500 and containing at a treatment level providing a total metal content between 100 and 5000 ppm by weight; and wherein the super-alkaline magnesium-containing detergent of ii) and the super-alkaline metal-containing detergent of iii) together provide the composition with a total soap content between 0.15% by weight and 8.0% by weight; iv) at least one dialkyl dithiophosphate zinc compound containing at a treatment level providing the composition with a zinc content greater than 100 ppm by weight and a phosphorus content less than 800 ppm by weight; v) at least one molybdenum-containing compound containing at a treatment level providing the composition with a total molybdenum content between 20 and 2000 ppm by weight; vi) at least one silicon-containing compound containing at a treatment level providing the composition with a total silicon content between 5 and 1000 ppm by weight; and vii) The lubricating oil composition has a total sulfate ash content of less than or equal to 2.0% by weight, a total phosphorus level of less than or equal to 800 ppm by weight, and an SAE viscosity grade of 25W-X, 20W-X, 15W-X, 10W-X, 5W-X, or 0W-X, where X represents any one of 8, 12, 16, 20, 30, 40, 50, or 60; b) supplying hydrogen-containing fuel to the HICE; and c) burning the fuel in the HICE. Lubricating oil compositions and concentrates for reducing the tendency for abnormal combustion events in HICE are also provided.

This invention provides a hydrogen fuel cell internal combustion engine lubricating oil composition and its preparation method. The hydrogen fuel cell internal combustion engine lubricating oil composition of this invention comprises the following components: (A) a nitrogen-containing organoboron compound; (B) a phenolic ester; (C) polyisobutylene succinimide; (D) salicylates and / or sulfurized alkylphenol salts; (E) zinc dihydrogen dithiophosphate; (F) an ashless friction modifier; (G) polymethyl methacrylate; and (H) a base oil in a major amount. The structure of the nitrogen-containing organoboron compound is shown in formula (I) and / or formula (II), with the definitions of each group provided in the specification. The hydrogen fuel cell internal combustion engine lubricating oil composition of this invention exhibits excellent antioxidant, detergency, dispersing, and anti-wear properties, effectively reducing engine wear caused by emulsification of hydrogen fuel cell internal combustion engine oil due to increased water content.

This invention relates to a method for reducing abnormal combustion events during engine operation of a hydrogen-fired internal combustion engine, comprising: (i) providing a lubricating oil composition to the hydrogen-fired internal combustion engine; (ii) providing hydrogen-containing fuel to the internal combustion engine; and (iii) burning the fuel in the hydrogen-fired internal combustion engine; wherein the lubricating oil composition: 1) comprises one or more dialkyl dithiophosphate zinc compounds providing more than 0.01% by weight of zinc and less than 0.08% by weight of phosphorus, or more than or equal to 0.10% by weight and less than 0.40% by weight of phosphorus, and 2) exhibits reduced pre-ignition at a given engine speed (rpm) and at maximum BMEP operation at the given engine speed (rpm), except that the concentration of the dialkyl dithiophosphate zinc compound causes the percentage of phosphorus present in the lubricating oil composition to be outside a specified range.