JP2004131742A5 - - Google Patents

Claims (15)

At least mineral oil or Ranaru sulfur content 0.03% by weight of the base oil, based on the total weight of the composition,
a) An ashless dispersant which is an alkenyl or alkyl succinimide or a derivative thereof is 0.01 to 0.3% by weight in terms of nitrogen content,
b) 3% sulfur content selected from the group consisting of alkali metal salts or alkaline earth metal salts of non-sulfurized alkylsalicylic acid and alkali metal salts or alkaline earth metal salts of non-sulfurized alkylphenol derivatives having a Mannich base structure In the following, a metal-containing detergent having a total base number of 10 to 350 mgKOH / g is 0.1 to 1% by weight in terms of sulfate ash,
c) zinc dialkyldithiophosphate having a secondary alkyl group derived from a secondary alcohol having 3 to 18 carbon atoms is 0.01 to 0.1% by weight in terms of phosphorus content, and d) oxidation 0.01 to 5% by weight of an inhibitory phenol compound and / or an antioxidant amine compound;
In an amount of 0.1 to 1% by weight, a phosphorus content in the range of 0.01 to 0.1% by weight, based on the total weight of the composition, and The sulfur content is in the range of 0.01 to 0.3% by weight, the chlorine content is 40 ppm or less, and the organic acid metal salt contained in the metal-containing detergent is 0.2 to 7 in the composition. A lubricating oil composition for a diesel engine , characterized in that it is present by weight. The lubricating oil composition according to claim 1 , wherein the metal-containing detergent as component b) is an alkali metal salt or alkaline earth metal salt of a non-sulfurized alkylsalicylic acid having a total base number of 30 to 300 mgKOH / g. object. The lubricating oil composition according to claim 2 , wherein the metal-containing detergent is an alkali metal salt or alkaline earth metal salt of a non-sulfurized alkyl salicylic acid having a total base number of 30 to 100 mgKOH / g.   The lubricating oil composition according to claim 1, wherein the metal-containing detergent as component b) is an organic acid having a carbon-nitrogen bond or an alkali metal salt or alkaline earth metal salt of a phenol derivative.   The lubricating oil composition according to claim 4, wherein the metal-containing detergent as component b) is an alkali metal salt or alkaline earth metal salt of a non-sulfurized alkylphenol derivative having a Mannich base structure.   The lubricating oil composition according to any one of claims 1 to 5, wherein the ashless dispersant as component a) is an ashless dispersant having a chlorine content of 30 ppm by weight or less. object.   An ashless dispersant is a succinimide obtained by reacting polybutenyl succinic anhydride with a polyamine obtained by a thermal reaction method using polybutene and maleic anhydride as raw materials and without contacting chlorine or a chlorine-containing compound. Alternatively, the lubricating oil composition according to claim 6, which is a derivative thereof.   The lubricating oil composition according to any one of claims 1 to 7, wherein the phosphorus content based on the total weight of the composition is 0.06% by weight or less.   The lubricating oil composition according to any one of claims 1 to 8, wherein the sulfur content based on the total weight of the composition is 0.15 wt% or less.   The lubricating oil composition according to any one of claims 1 to 9, wherein component d) is a hindered phenol compound and / or a diarylamine compound.   Furthermore, 0.01-5 weight% of molybdenum containing compounds are contained, The lubricating oil composition in any one of the Claims 1 thru | or 10 characterized by the above-mentioned.   Furthermore, 0.01-5 weight% of alkali metal borate hydrate is contained, The lubricating oil composition in any one of Claims 1 thru | or 11 characterized by the above-mentioned.   The lubricating oil composition according to any one of claims 1 to 12, which is a multigrade engine oil further containing a viscosity index improver. The lubricating oil composition according to any one of claims 1 to 13, wherein the sulfur content of the base oil is 0.005% by weight or less. The lubricating oil composition according to any one of claims 1 to 14, wherein the lubricating oil composition is used for lubricating an engine for a vehicle equipped with a diesel engine equipped with an exhaust gas purifying device using a particulate filter and an oxidation catalyst.