Patents Assigned to Chevron Japan Ltd.
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Patent number: 8703677Abstract: Provided herein are lubricating oil compositions for high performance engines comprising a Group III base oil and a combination of ester base stocks, wherein the combination comprises (i) an ester base stock having a kinematic viscosity at 100° C. of about 2-10 cSt, (ii) an ester base stock having a kinematic viscosity at 100° C. of about 10 to 50 cSt, and (iii) an ester base stock having a kinematic viscosity at 100° C. of greater than about 100 cSt. The lubricating oil composition can further comprise at least one additive. Methods of making and using the lubricating oil compositions are also described.Type: GrantFiled: December 21, 2007Date of Patent: April 22, 2014Assignees: Chevron Japan Ltd, Chevron Oronite Company LLCInventors: Alexander B. Boffa, Satoshi Hirano, Mark Louis Sztenderowicz, Kenji Takeoka
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Publication number: 20130085089Abstract: A lubricating oil composition which has a sulfur content of 0.5 wt. % or less and which at least comprises a base oil and the following additive components a) to e): a) an ashless dispersant comprising an alkenyl- or alkyl-succinimide or a derivative thereof; b) an ashless dispersant comprising an alkenyl- or alkyl-succinic ester or a derivative thereof; c) a molybdenum complex of a basic nitrogen-containing compound; d) an alkaline earth metal-containing detergent having TBN of 10-400 mg·KOH/g; and e) an anti-wear agent favorably employed for lubricating internal combustion engines operated using a low sulfur hydrocarbon fuel.Type: ApplicationFiled: September 28, 2012Publication date: April 4, 2013Applicant: Chevron Japan Ltd.Inventors: Yoshitaka Takeuchi, Takashi Sugimura, Toshimi Kawamura
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Patent number: 8361940Abstract: A low sulfated ash, tow sulfur, low phosphorus, low zinc lubricating, oil composition preferably employable for internal combustion engines using a low sulfur hydrocarbon fuel comprises a base oil having a saturated component of 85 wt. % or more, a viscosity index of 110 or more, and a sulfur content of 0.01 wt. % or less; an alkaline earth metal-containing detergent; a nitrogen-containing ashless dispersant of a weight average molecular weight of 4,500 or more; a phenolic or amine oxidation inhibitor; and a basic nitrogen-containing compound-oxymolybdenum complex.Type: GrantFiled: September 12, 2007Date of Patent: January 29, 2013Assignee: Chevron Japan Ltd.Inventors: Morikuni Nakazato, Yoshitaka Takeuchi, Takahiro Muramatsu
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Publication number: 20120132166Abstract: A lubricating oil composition of SAE viscosity grade 0W20 which comprises a base oil and additive components comprising a nitrogen-containing ashless dispersant, an alkaline earth metal-containing detergent, a phosphorus-containing wear inhibitor, an oxidation inhibitor and a viscosity index improver and which shows a viscosity index of 200-240, a HTHS viscosity of not less than 2.9 mPa·s s at 150° C. and a Noack evaporation loss of not more than 13% favorably gives a high fuel economy and high wear inhibition to a four cycle gasoline engine of motorcycles and a diesel engine mounted on motor cars equipped with an exhaust gas post-processing apparatus.Type: ApplicationFiled: November 11, 2011Publication date: May 31, 2012Applicant: Chevron Japan Ltd.Inventors: Hiroki Andoh, Morikuni Nakazato
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Publication number: 20120118258Abstract: A lubricating oil composition having a low sulfated ash content, a low P content, a low S content and a low Cl content and being favorably employable for lubricating a diesel engine operated using a hydrocarbon fuel oil having a low S content, comprising the following components a) to d) dissolved or dispersed in a base oil having a low S content: a) an ashless dispersant such as alkenyl- or alkyl succinimide or its derivative, b) a calcium alkylsalicylate detergent having a low S content and an organic acid calcium salt, which is an unsulfurized calcium alkylsalicylate detergent having a C14-C18 alkyl group, c) a zinc phosphate anti-wear agent, and d) an oxidation inhibitor.Type: ApplicationFiled: September 7, 2011Publication date: May 17, 2012Applicant: Chevron Japan, Ltd.Inventors: Yoshitaka Takeuchi, Toshimi Kawamura
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Publication number: 20120118259Abstract: A lubricating oil composition having a low sulfated ash content, a low P content, a low S content and a low Cl content and being favorably employable for lubricating a diesel engine operated using a hydrocarbon fuel oil having a low S content, comprises the following components a) to d) dissolved or dispersed in a base oil having a low S content: a) an ashless dispersant such as alkenyl- or alkylsuccinimide or its derivative, b) a calcium alkylsalicylate detergent having a low S content and containing an organic acid calcium salt, which is a mixture of an unsulfurized calcium alkylsalicylate detergent having a C14-C18 alkyl group and an unsulfurized calcium alkylsalicylate detergent having a C20-C28 alkyl group, c) a zinc phosphate anti-wear agent, and d) an oxidation inhibitor.Type: ApplicationFiled: September 7, 2011Publication date: May 17, 2012Applicant: Chevron Japan, Ltd.Inventors: Yoshitaka Takeuchi, Toshimi Kawamura
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Patent number: 7960319Abstract: A lubricating oil composition favorably employable for trunk piston diesel engines contains an overbased sulfurized alkylphenol calcium salt, at least two (preferably three) overbased alkylsalicylic acid calcium salts having different base ratios and hydrocarbyl groups of different carbon atom numbers, a borated ashless dispersant, and a zinc dihydrocarbyldithiophosphate.Type: GrantFiled: December 13, 2007Date of Patent: June 14, 2011Assignee: Chevron Japan Ltd.Inventor: Hiroyuki Nagamatsu
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Patent number: 7956021Abstract: A lubricating oil composition comprising a base oil of lubricating viscosity having a kinematic viscosity of 22 to 300 mm2/s at 40° C. and dissolved or dispersed therein the following additives in the following amounts based on a total amount of the lubricating oil composition: (1) an overbased sulfurized alkylphenol calcium salt detergent in an amount of 0.5 to 1.0 wt. % in terms of calcium content, (2) an overbased calcium alkylbenzenesulfonate detergent in an amount of 1.5 to 2.1 wt. % in terms of calcium content, (3) a nitrogen-containing ashless dispersant in an amount of 0.005 to 0.1 wt. % in terms of nitrogen content, and (4) a zinc dihydrocarbyldithiophosphate in an amount of 0.007 to 0.1 wt.Type: GrantFiled: December 19, 2006Date of Patent: June 7, 2011Assignee: Chevron Japan Ltd.Inventor: Hiroyuki Nagamatsu
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Patent number: 7875577Abstract: A lubricating oil composition comprising a base oil of lubricating viscosity having a kinematic viscosity of 22 to 300 mm2/s at 40° C. and dissolved or dispersed therein the following additives in the following amounts based on a total amount of the lubricating oil composition: (1) an overbased sulfurized alkylphenol calcium salt detergent in an amount of 0.1 to 1.6 wt. % in terms of calcium content, (2) an overbased calcium alkylbenzenesulfonate detergent in an amount of 0.6 to 2.1 wt. % in terms of calcium content, (3) a nitrogen-containing ashless dispersant in an amount of 0.005 to 0.1 wt. % in terms of nitrogen content, and (4) a zinc dihydrocarbyldithiophosphate in an amount of 0.01 to 0.1 wt.Type: GrantFiled: December 20, 2006Date of Patent: January 25, 2011Assignee: Chevron Japan Ltd.Inventor: Hiroyuki Nagamatsu
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Patent number: 7687444Abstract: A lubricating oil composition having a TBN in the range of 5 to 55 mg KOH/g and containing a major amount of a base oil of lubricating viscosity and a) 0.19 to 2.10 wt %, based on the total amount of the lubricating oil composition, of an overbased calcium carboxylate having a TBN of 100 mg KOH/g or more, wherein the wt % is expressed in terms of the calcium content; b) 0.002 to 0.06 wt %, based on the total amount of the lubricating oil composition, of a bis-succinimide compound, wherein the wt % is expressed in terms of the nitrogen content; and c) 0.007 to 0.15 wt %, based on the total amount of the lubricating oil composition, of a zinc dialkyldithiophosphate having a secondary alkyl group, wherein the wt % is expressed in terms of the phosphorus content.Type: GrantFiled: December 20, 2005Date of Patent: March 30, 2010Assignee: Chevron Japan Ltd.Inventor: Hiroyuki Nagamatsu