Patents Assigned to Chevron Japan Ltd.
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Publication number: 20240101923Abstract: This disclosure describes a zinc-free lubricating oil composition. The composition includes a major amount of an oil of lubricating viscosity having a kinematic viscosity at 100° C. in a range of about 1.5 to about 35 mm2/s and an anti-wear mixture having one or more ashless dispersants and an alkyl phosphonic acid having a structure given by wherein R is a C3-C20 hydrocarbyl group. The initial pH of the anti-wear mixture is between 5-9.5 as measured by ASTM D664.Type: ApplicationFiled: September 14, 2021Publication date: March 28, 2024Applicant: CHEVRON JAPAN LTD.Inventors: Masami FUCHI, Naoya SASAKI, Takahiro NAKAGAWA, Satoshi OHTA, Naoki MASUDA, Koichi KUBO
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Publication number: 20240093115Abstract: This disclosure describes an ashless lubricant additive. The additive is a tertiary amine-containing compound having the following structure: where R1 and R2 are independently a linear or branched-chain monovalent hydrocarbyl group having two to about twenty carbon atoms, each m is independently from 0 to 2, each p is independently from 0 to 2, for each cyclic moiety m+p is from 2 to 4, and each n is independently from 1 to 6.Type: ApplicationFiled: September 29, 2021Publication date: March 21, 2024Applicants: CHEVRON ORONITE COMPANY LLC, CHEVRON JAPAN LTD.Inventors: William Raymond RUHE, JR., Masami FUCHI, Seyedeh Mahboobeh HOSSEINI
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Publication number: 20230250358Abstract: Disclosed is a method for reducing corrosion in a hybrid engine. The method includes the steps of lubricating a hybrid engine with a lubricating oil composition having a major amount of an oil of lubricating viscosity; a minor amount of a salicylate detergent derived from an isomerized normal alpha olefin; and a minor amount of a dispersant.Type: ApplicationFiled: July 20, 2021Publication date: August 10, 2023Applicants: CHEVRON JAPAN LTD., CHEVRON ORONITE COMPANY LLCInventors: Isao TANAKA, John Robert MILLER, Kyosuke AOYAMA
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Publication number: 20230242832Abstract: Disclosed is a method for maintaining emulsion stability in a hybrid engine. The method involves lubricating and operating the hybrid engine with a lubricating oil composition having a major amount of an oil of lubricating viscosity; minor amount of a magnesium containing detergent, and a minor amount of a borated dispersant.Type: ApplicationFiled: July 20, 2021Publication date: August 3, 2023Applicants: CHEVRON JAPAN LTD., CHEVRON ORONITE COMPANY LLCInventors: Isao TANAKA, John Robert MILLER
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Publication number: 20220220410Abstract: This disclosure describes an ashless lubricant additive. The additive is a tertiary amine-containing compound having the following structure: where each R1 and R5 is independently a linear or branched-chain monovalent hydrocarbyl group having two to about twenty carbon atoms, where each R2, R3, and R4 is independently a hydrogen, a linear or branched-chain monovalent hydrocarbyl group having one to about twenty carbon atoms wherein at least one of R2, R3, and R4 is hydrogen, each m is independently from 0 to 2, each p is independently from 0 to 2, for each cylic moiety m+p is from 2 to 4, and each n is independently from 1 to 6.Type: ApplicationFiled: March 31, 2022Publication date: July 14, 2022Applicants: CHEVRON ORONITE COMPANY LLC, CHEVRON JAPAN LTD.Inventors: William Raymond RUHE, JR., Masami FUCHI, Seyedeh Mahboobeh HOSSEINI
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Publication number: 20220213401Abstract: The present disclosure generally relates to a lubricating oil composition comprising: a major amount of an oil of lubricating viscosity, one or more detergents comprising at least one alkylhydroxybenzoate compound, and an ashless sulfur compound. Also provided is a method of lubricating an engine with said lubricating oil composition.Type: ApplicationFiled: September 3, 2020Publication date: July 7, 2022Applicants: CHEVRON ORONITE COMPANY LLC, CHEVRON JAPAN LTD.Inventors: Claire CHOMMELOUX, John Robert MILLER, Shelby A. SKELTON, Mark L. SZTENDEROWICZ, Alexander BOFFA, Isao TANAKA
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Patent number: 11214754Abstract: Provided is an internal combustion engine lubricating oil composition having a major amount of an oil of lubricating viscosity; a combination of alkaline earth metal alkylhydroxybenzoate detergents; at least about 50 to about 500 ppm of boron from a boron containing detergent; a molybdenum containing compound in an amount to provide the lubricating oil composition from about 100 to about 1500 ppm molybdenum; a ZnDTP compound; where the composition comprises magnesium in an amount from about 100 to about 800 ppm, and calcium in an amount from about 500 to about 2000 ppm.Type: GrantFiled: October 15, 2018Date of Patent: January 4, 2022Assignee: CHEVRON JAPAN LTD.Inventors: Hisanari Onouchi, Koichi Kubo, Isao Tanaka
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Patent number: 11193084Abstract: Provided is a lubricating oil composition having a HTHS viscosity at 150° C. in a range of about 1.7 to about 3.2 mPa s and a low temperature cold cranking viscosity of less than 7,000 mPa s at ?20° C., comprising: (a) a major amount of an oil of lubricating viscosity having a kinematic viscosity at 100° C. of from 3.5 mm2/s to 20 mm2/s and a viscosity index of greater than 120 with a sulfur content of less than 0.03 wt. %, are classified into the API group III, IV, or V base stock category, and have an aromatics content (CA) of less than 5%; (b) an organomolybdenum compound; (c) a dispersed hydrated alkali metal borate compound; (e) one or more dispersants; (f) one or more calcium-based metal detergents; and (g) optionally, one or more magnesium-based metal detergents. Also provided is a method for improving wear, high temperature detergency, and thermal stability in an engine comprising operating said engine with said lubricating oil composition.Type: GrantFiled: November 16, 2018Date of Patent: December 7, 2021Assignee: CHEVRON JAPAN LTD.Inventors: Koichi Kubo, Yoshitaka Takeuchi, Taiki Hattori, Chihiro Sone
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Publication number: 20210292676Abstract: The present invention generally relates to lubricating oil compositions useful for automatic transmissions, and particularly transmission oils for automotive automatic transmissions in battery electrical vehicles (BEVs), hybrid vehicles (HVs) and plug-in hybrid vehicles (PHVs). The lubricant is free of metal compounds (e.g., Ca, Mo, or Zn) and demonstrates high volume resistivity, wear protection, and copper corrosion resistance.Type: ApplicationFiled: March 19, 2020Publication date: September 23, 2021Applicant: CHEVRON JAPAN LTD.Inventors: Koichi KUBO, Masami FUCHI, Naoya SASAKI, Takahiro NAKAGAWA, Satoshi OHTA
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Publication number: 20210292677Abstract: The present invention generally relates to lubricating oil compositions useful for reducing NOACK volatility in finished lubricating oils of an internal combustion engine. Also disclosed is a method for reducing NOACK volatility in finished lubricating oils in said engine.Type: ApplicationFiled: March 19, 2021Publication date: September 23, 2021Applicant: CHEVRON JAPAN LTD.Inventors: Isao TANAKA, Taiki HATTORI, Wataru AKAHORI
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Patent number: 10669507Abstract: The present invention is directed to a lubricating oil additive containing a vicinal diol and a particular detergent blend typically is low viscosity base oils whereby exhibiting improved fuel economy. In this respect, disclosed is a lubricating oil composition comprising: a major amount of base oil of lubricating viscosity; a friction modifier which is selected from the group consisting of C10-C30 alkane 1,2-diols and C10-C30 alkene 1,2-diols; an overbased alkyl alkaline earth metal hydroxybenzoate detergent having a metal ratio less than 3.0; and an overbased alkyl calcium sulfonate or an overbased alkyl calcium hydroxybenzoate having a metal ratio of 3.5 or greater.Type: GrantFiled: November 18, 2016Date of Patent: June 2, 2020Assignee: CHEVRON JAPAN LTD.Inventor: Nobuo Ushioda
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Patent number: 10604719Abstract: The present invention generally relates to lubricating oil compositions useful for automatic transmissions, and particularly transmission oils for automotive automatic transmissions and/or continuously variable transmissions using wet clutch systems, in particular wet paper clutch containing a small amount of cellulose fiber and/or aramid fiber.Type: GrantFiled: February 22, 2018Date of Patent: March 31, 2020Assignee: Chevron Japan LTD.Inventors: Koichi Kubo, Masami Fuchi, Takahiro Nakagawa, Naoya Sasaki, Satoshi Ohta
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Patent number: 9499765Abstract: The present invention is directed to a Zinc-free transmission oil composition for construction machinery comprising: (i) a major amount of an oil of lubricating viscosity, (ii) at least 0.25 wt. % of a dithiophosphorylated carboxylic acid compound, and (iii) a succinimide dispersant derived from a polyisobutylene group of 1200 molecular weight or less. Also provided is a method for lubricating the transmission of a construction machine comprising lubricating the transmission with a Zinc-free transmission oil composition comprising: (i) a major amount of an oil of lubricating viscosity, (ii) at least 0.25 wt. % of a dithiophosphorylated carboxylic acid compound, and a succinimide dispersant derived from a polyisobutylene group of 1200 molecular weight or less.Type: GrantFiled: March 23, 2015Date of Patent: November 22, 2016Assignee: Chevron Japan Ltd.Inventors: Shuhei Yamamoto, Masanobu Sakamoto
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Publication number: 20160281022Abstract: The present invention is directed to a Zinc-free transmission oil composition for construction machinery comprising: (i) a major amount of an oil of lubricating viscosity, (ii) at least 0.25 wt. % of a dithiophosphorylated carboxylic acid compound, and (iii) a succinimide dispersant derived from a polyisobutylene group of 1200 molecular weight or less. Also provided is a method for lubricating the transmission of a construction machine comprising lubricating the transmission with a Zinc-free transmission oil composition comprising: (i) a major amount of an oil of lubricating viscosity, (ii) at least 0.25 wt. % of a dithiophosphorylated carboxylic acid compound, and a succinimide dispersant derived from a polyisobutylene group of 1200 molecular weight or less.Type: ApplicationFiled: March 23, 2015Publication date: September 29, 2016Applicant: CHEVRON JAPAN LTD.Inventors: Shuhei Yamamoto, Masanobu Sakamoto
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Patent number: 9102896Abstract: A fuel economical lubricating oil composition for internal combustion engines comprises a base oil and an additive composition comprising an overbased metal-containing detergent and a molybdenum-containing friction modifier, in which the overbased metal-containing detergent comprises calcium salicylate having an alkyl group having an average carbon atom number of 14-18, at least 60 mol. % of the alkyl group having a carbon atom number of 14-18, and calcium sulfonate having an alkyl group having an average carbon atom number of 20-24, at least 60 mol. % of the alkyl group having a carbon atom number of 20-24, and/or calcium salicylate having an alkyl group having an average carbon atom number of 20-28, at least 60 mol. % of the alkyl group having a carbon atom number of 20-28.Type: GrantFiled: December 17, 2012Date of Patent: August 11, 2015Assignee: Chevron Japan LTD.Inventors: Nobuo Ushioda, Tsuyoshi Miyamoto, Yasuhiro Ogasawara
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Publication number: 20150210955Abstract: 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: April 3, 2015Publication date: July 30, 2015Applicant: CHEVRON JAPAN LTD.Inventors: Yoshitaka Takeuchi, Takashi Sugimura, Toshimi Kawamura
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Publication number: 20150175929Abstract: Provided is a lubricating oil composition that is highly fuel-efficient and has high wear resistance and is particularly suited for lubrication of a motorcycle four-cycle gasoline engine or a diesel engine vehicle having an exhaust gas after-treatment device. The lubricating oil composition, which is a lubricating oil composition having an SAE viscosity grade of 5W20, comprises a base oil and predetermined amounts of additive components comprising of a nitrogen-containing ash-free dispersant, an alkali earth metal-containing detergent, a phosphorus-containing anti-wear agent, an antioxidant, and a viscosity index-improving agent, wherein the viscosity index is within a range of 140 to 230, the high-shear viscosity at 150° C. is 2.9 mPa·s or higher, and the NOACK evaporation loss is 13% or less.Type: ApplicationFiled: March 3, 2015Publication date: June 25, 2015Applicant: CHEVRON JAPAN LTDInventors: Hiroki Andoh, Morikuni Nakazato
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Publication number: 20150087567Abstract: The present invention is directed to a lubricating oil additive containing a vicinal diol and a particular detergent blend typically is low viscosity base oils whereby exhibiting improved fuel economy. In this respect, disclosed is a lubricating oil composition comprising: a major amount of base oil of lubricating viscosity; a friction modifier which is selected from the group consisting of C10-C30 alkane 1,2-diols and C10-C30 alkene 1,2-diols; an overbased alkyl alkaline earth metal hydroxybenzoate detergent having a metal ratio less than 3.0; and an overbased alkyl calcium sulfonate or an overbased alkyl calcium hydroxybenzoate having a metal ratio of 3.5 or greater.Type: ApplicationFiled: September 17, 2014Publication date: March 26, 2015Applicant: CHEVRON JAPAN LTD.Inventor: Nobuo Ushioda
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Patent number: 8926763Abstract: Interior parts of gasoline engines are readily cleaned by a method comprising the steps of connecting an a cleaning liquid supply pipe having a gas supply port thereon airtightly to a port of an intake pipe of the engine below a throttle valve-attached position of the engine; operating the engine to draw cleaning liquid in the form of liquid drop and simultaneously drawing continuously a gas having an oxygen concentration of less than 20 vol. % into the intake pipe; and exhausting the cleaning liquid having been brought into contact with the internal parts of the engine with an exhaust gas.Type: GrantFiled: May 16, 2008Date of Patent: January 6, 2015Assignee: Chevron Japan Ltd.Inventors: Yasuhiro Ogasawara, Toshio Anami, Yuuki Katoh
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Patent number: 8784642Abstract: 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: GrantFiled: November 11, 2011Date of Patent: July 22, 2014Assignee: Chevron Japan Ltd.Inventors: Hiroki Andoh, Morikuni Nakazato