Patents by Inventor Zhisheng Gao
Zhisheng Gao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11629308Abstract: This disclosure relates to a lubricating oil (e.g., gear oil) for use in an electric or hybrid vehicle. The lubricating oil has a composition including one or more lubricating oil base stocks as a major component, and one or more lubricating oil additives, as a minor component. The one or more lubricating oil base stocks include at least one Group IV base oil, or at least one Group V base oil. The lubricating oil has a kinematic viscosity (KV100) from 1 cSt to 7 cSt at 100° C. as determined by ASTM D-445, and an electrical conductivity at room temperature of less than 15,000 pS/m as determined by ASTM D-2624. This disclosure also relates to methods for producing a lubricating oil for a transmission, gear train, gear set, gear box, or gears of an electric vehicle powertrain and methods for improving energy efficiency, while maintaining or improving wear control.Type: GrantFiled: January 16, 2020Date of Patent: April 18, 2023Assignee: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANYInventors: Luca Salvi, Zhisheng Gao, Abigail R. Van Wassen, Martin N. Webster
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Patent number: 11345872Abstract: Sulfur-free, ashless, and low phosphorus-containing lubricant compositions for use as engine oil having improved oxidation stability. The lubricant composition can include about 60.0 mass % to about 99.8 mass % of an oil base stock, at least one ashless antiwear additive, at least one ashless detergent, and at least one antioxidant, based on a total mass of the lubricant composition. The oil base stock can include at least one polyalphaolefin and at least one alkyl naphthalene. The lubricant composition can contain less than about 0.05 mass % phosphorus, less than about 0.05 mass % sulfur, and less than about 0.05 mass % ash. The lubricant composition can be made by a process that includes combining the above-mentioned components to provide a lubricant composition.Type: GrantFiled: January 14, 2021Date of Patent: May 31, 2022Assignee: ExxonMobil Technology and Engineering CompanyInventor: Zhisheng Gao
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Patent number: 11220648Abstract: Naphtha boiling range compositions are provided that can have improved combustion properties (relative to the research octane number of the composition) in spark ignition engines and/or compression ignition engines. The improved combustion properties can be achieved by controlling the total combined amounts of n-paraffins and isoparaffins that include a straight-chain propyl group (R1—CH2—CH2—CH2—R2). For such a straight-chain propyl group, R2 can correspond to any convenient CxHy group that can appear in a paraffin or isoparaffin. R1 can correspond to a hydrogen atom, making the straight-chain propyl group a terminal n-propyl group; or R1 can correspond to any convenient CxHy group that can appear in a paraffin or isoparaffin.Type: GrantFiled: January 31, 2020Date of Patent: January 11, 2022Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Eugine Choi, Matthew W. Boland, Zhisheng Gao, Luca Salvi, Shamel Merchant, Bruce W. Crawley
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Publication number: 20210238492Abstract: Naphtha boiling range compositions are provided that can have improved combustion properties (relative to the research octane number of the composition) in spark ignition engines and/or compression ignition engines. The improved combustion properties can be achieved by controlling the total combined amounts of n-paraffins and isoparaffins that include a straight-chain propyl group (R1—CH2—CH2—CH2—R2). For such a straight-chain propyl group, R2 can correspond to any convenient CxHy group that can appear in a paraffin or isoparaffin. R1 can correspond to a hydrogen atom, making the straight-chain propyl group a terminal n-propyl group; or R1 can correspond to any convenient CxHy group that can appear in a paraffin or isoparaffin.Type: ApplicationFiled: January 31, 2020Publication date: August 5, 2021Inventors: Eugine Choi, Matthew W. Boland, Zhisheng Gao, Luca Salvi, Shamel Merchant, Bruce W. Crawley
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Publication number: 20210238493Abstract: Sulfur-free, ashless, and low phosphorus-containing lubricant compositions for use as engine oil having improved oxidation stability. The lubricant composition can include about 60.0 mass % to about 99.8 mass % of an oil base stock, at least one ashless antiwear additive, at least one ashless detergent, and at least one antioxidant, based on a total mass of the lubricant composition. The oil base stock can include at least one polyalphaolefin and at least one alkyl naphthalene. The lubricant composition can contain less than about 0.05 mass % phosphorus, less than about 0.05 mass % sulfur, and less than about 0.05 mass % ash. The lubricant composition can be made by a process that includes combining the above-mentioned components to provide a lubricant composition.Type: ApplicationFiled: January 14, 2021Publication date: August 5, 2021Inventor: Zhisheng Gao
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Patent number: 10829708Abstract: A method for preventing or reducing engine knock or pre-ignition in a high compression spark ignition engine with relatively high oil consumption, lubricated with a lubricating oil by using as the lubricating oil a formulated oil. The formulated oil has a composition that contains a lubricating oil base stock comprising at least one ester including at least one group selected from the group consisting of Formula (1), Formula (2), Formula (3) and Formula (4) below or at least one ester having at least 25% of its carbons in the form of methyl groups: The lubricating oils of this disclosure are useful as passenger vehicle engine oil (PVEO) products.Type: GrantFiled: December 11, 2017Date of Patent: November 10, 2020Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Zhisheng Gao, Eugine Choi, Luca Salvi, Matthew W. Boland
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Publication number: 20200277542Abstract: This disclosure relates to a lubricating oil (e.g., gear oil) for use in an electric or hybrid vehicle. The lubricating oil has a composition including one or more lubricating oil base stocks as a major component, and one or more lubricating oil additives, as a minor component. The one or more lubricating oil base stocks include at least one Group IV base oil, or at least one Group V base oil. The lubricating oil has a kinematic viscosity (KV100) from 1 cSt to 7 cSt at 100° C. as determined by ASTM D-445, and an electrical conductivity at room temperature of less than 15,000 pS/m as determined by ASTM D-2624. This disclosure also relates to methods for producing a lubricating oil for a transmission, gear train, gear set, gear box, or gears of an electric vehicle powertrain and methods for improving energy efficiency, while maintaining or improving wear control.Type: ApplicationFiled: January 16, 2020Publication date: September 3, 2020Inventors: Luca Salvi, Zhisheng Gao, Abigail R. Van Wassen, Martin N. Webster
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Publication number: 20200199482Abstract: This disclosure relates to a lubricating oil having a lubricating oil base stock as a major component, and one or more lubricating oil additives as a minor component. The lubricating oil base stock has at least one first ester that is partially esterified, and at least one second ester that is fully esterified. The lubricating oil has a flash point from about 125° C. to about 225° C. as determined by ASTM D-93, and a kinematic viscosity (KV100) from about 1 to about 5 at 100° C. as determined by ASTM D-445. The at least one first ester and the at least one second ester are present in an amount such that, as the flash point of the lubricating oil is increased, the kinematic viscosity (KV100) of the lubricating oil is decreased or maintained. This disclosure also relates to a method for increasing flash point, while decreasing or maintaining viscosity, of a lubricating oil in an engine or other mechanical component lubricated with the lubricating oil by using the lubricating oil.Type: ApplicationFiled: December 18, 2019Publication date: June 25, 2020Inventors: Smruti A. Dance, Andrew E. Taggi, Joseph S. Bair, Zhisheng Gao
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Publication number: 20200199430Abstract: This disclosure relates to a heat transfer fluid having at least one first ester that is partially esterified, and at least one second ester that is fully esterified. The heat transfer fluid has a flash point from about 125° C. to about 225° C. as determined by ASTM D-93, and a kinematic viscosity (KV100) from about 1 to about 5 at 100° C. as determined by ASTM D-445. The at least one first ester and the at least one second ester are present in an amount such that, as the flash point and thermal conductivity of the heat transfer fluid are increased, the kinematic viscosity (KV100) of the heat transfer fluid is decreased or essentially maintained. This disclosure also relates to a method for increasing flash point and thermal conductivity, while decreasing or essentially maintaining viscosity, of a heat transfer fluid by using the heat transfer fluid.Type: ApplicationFiled: December 18, 2019Publication date: June 25, 2020Inventors: Smruti A. Dance, Andrew E. Taggi, Joseph S. Bair, Zhisheng Gao
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Patent number: 10604720Abstract: A method for preventing or reducing engine knock or pre-ignition in a high compression spark ignition engine lubricated with a lubricating oil by introducing to a combustion chamber of the engine from 0.1 to 5% by volume of the gasoline used a lubricating oil as a formulated oil, said formulated oil having a composition comprising (i) a major amount of a lubricating oil base stock comprising at least 80% by weight of one branched ester having at least 15% of the total carbons in the form of methyl groups, and (ii) a minor amount of at least one ashless amine phosphate antiwear additive.Type: GrantFiled: July 15, 2019Date of Patent: March 31, 2020Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Zhisheng Gao, Luca Salvi, Eugine Choi, Matthew W. Boland, Andrew E. Taggi, Andrew D. Satterfield
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Patent number: 10584292Abstract: Naphtha boiling range compositions are provided that can have improved combustion properties (relative to the research octane number of the composition) in spark ignition engines and/or compression ignition engines. The improved combustion properties can be achieved by controlling the total combined amounts of n-paraffins and isoparaffins that include a straight-chain propyl group (R1—CH2—CH2—CH2—R2). For such a straight-chain propyl group, R2 can correspond to any convenient CxHy group that can appear in a paraffin or isoparaffin. R1 can correspond to a hydrogen atom, making the straight-chain propyl group a terminal n-propyl group; or R1 can correspond to any convenient CxHy group that can appear in a paraffin or isoparaffin.Type: GrantFiled: October 20, 2017Date of Patent: March 10, 2020Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Eugine Choi, Matthew W. Boland, Zhisheng Gao, Luca Salvi, Shamel Merchant, Bruce W. Crawley
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Patent number: 10550344Abstract: Naphtha boiling range compositions are provided that can have improved combustion properties (relative to the research octane number of the composition) in spark ignition engines and/or compression ignition engines. The improved combustion properties can be achieved by controlling the total combined amounts of n-paraffins and isoparaffins that include a straight-chain propyl group (R1—CH2—CH2—CH2—R2). For such a straight-chain propyl group, R2 can correspond to any convenient CxHy group that can appear in a paraffin or isoparaffin. R1 can correspond to a hydrogen atom, making the straight-chain propyl group a terminal n-propyl group; or R1 can correspond to any convenient CxHy group that can appear in a paraffin or isoparaffin.Type: GrantFiled: October 20, 2017Date of Patent: February 4, 2020Assignee: ExxonMobil Reseach and Engineering CompanyInventors: Eugine Choi, Matthew W. Boland, Zhisheng Gao, Luca Salvi, Shamel Merchant, Bruce W. Crawley
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Publication number: 20190338213Abstract: A method for preventing or reducing engine knock or pre-ignition in a high compression spark ignition engine lubricated with a lubricating oil by introducing to a combustion chamber of the engine from 0.1 to 5% by volume of the gasoline used a lubricating oil as a formulated oil, said formulated oil having a composition comprising (i) a major amount of a lubricating oil base stock comprising at least 80% by weight of one branched ester having at least 15% of the total carbons in the form of methyl groups, and (ii) a minor amount of at least one ashless amine phosphate antiwear additive.Type: ApplicationFiled: July 15, 2019Publication date: November 7, 2019Inventors: Zhisheng Gao, Luca Salvi, Eugine Choi, Matthew W. Boland, Andrew E. Taggi, Andrew D. Satterfield
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Patent number: 10458830Abstract: A method for improving fuel efficiency testing precision in on-road vehicles. The method comprises: installing one or more dataloggers in one or more vehicles, each datalogger configured to receive fuel consumption data broadcast by an on-road vehicle's engine control unit (ECU); transmitting the fuel consumption data from the one or more dataloggers in the one or more on-road vehicles to a processor; and analyzing, using the processor, the fuel consumption data from the one or more dataloggers in the one or more on-road vehicles to determine fuel efficiency of the one or more on-road vehicles. The fuel consumption data comprises fuel rate data from the ECU which is transmitted through the one or more dataloggers, engine speed and other operating parameters from the ECU that are transmitted through the one or more dataloggers, torque sensor data which is transmitted through the one or more dataloggers, and traditional fuel log data.Type: GrantFiled: August 2, 2017Date of Patent: October 29, 2019Assignee: ExxonMobil Research and Engineering CompanyInventors: Zhisheng Gao, Steven M. Jetter, Riccardo Conti, Arthur T. Andrews, Aparna Subramanian, Leonard R. Koenig, Steven Kennedy
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Publication number: 20190062668Abstract: An ashless lubricating oil having a lubricating oil base stock as a major component, and a mixture of (i) at least one ashless antiwear additive, (ii) at least one ashless detergent, and (iii) at least one aminic antioxidant, as minor components. The lubricating oil base stock is a monoester obtained by a) reacting one Guerbet alcohol of 8 to 20 carbon atoms with a Guerbet acid, a linear or branched acid of 6 to 20 carbon atoms or b) reacting one linear or branched alcohol with at least 6 to 20 carbon atoms with a Guerbet acid of 8 to 20 carbon atoms. The lubricating oil base stock is present in an amount from 30 to 99.8 wt. % of the oil. A method for improving oxidative stability and high temperature stability of a lubricating oil in an engine or other mechanical component lubricated with the lubricating oil by using the ashless lubricating oil.Type: ApplicationFiled: August 22, 2018Publication date: February 28, 2019Inventors: Zhisheng GAO, Luca SALVI, Eugine CHOI, Matthew W. BOLAND
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Publication number: 20190062667Abstract: An ashless lubricating oil having a lubricating oil base stock as a major component, and a mixture of (i) at least one ashless antiwear additive, (ii) at least one ashless detergent, and (iii) at least one aminic antioxidant, as minor components. The lubricating oil base stock is a branched polyol ester. The lubricating oil base stock is present in an amount from about 30 to about 99.8 mass percent, based on the total mass of the ashless lubricating oil. A method for improving oxidative stability and high temperature stability of a lubricating oil in an engine or other mechanical component lubricated with the lubricating oil by using the ashless lubricating oil. The ashless lubricating oil is useful as a passenger vehicle engine oil (PVEO).Type: ApplicationFiled: August 22, 2018Publication date: February 28, 2019Inventors: Zhisheng GAO, Luca SALVI, Eugine CHOI, Matthew W. BOLAND
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Publication number: 20180171253Abstract: A method for preventing or reducing engine knock or pre-ignition in a high compression spark ignition engine with relatively high oil consumption, lubricated with a lubricating oil by using as the lubricating oil a formulated oil. The formulated oil has a composition that contains a lubricating oil base stock comprising at least one ester including at least one group selected from the group consisting of Formula (1), Formula (2), Formula (3) and Formula (4) below or at least one ester having at least 25% of its carbons in the form of methyl groups: The lubricating oils of this disclosure are useful as passenger vehicle engine oil (PVEO) products.Type: ApplicationFiled: December 11, 2017Publication date: June 21, 2018Inventors: Zhisheng Gao, Eugine Choi, Luca Salvi, Matthew W. Boland
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Publication number: 20180134975Abstract: Naphtha boiling range compositions are provided that can have improved combustion properties (relative to the research octane number of the composition) in spark ignition engines and/or compression ignition engines. The improved combustion properties can be achieved by controlling the total combined amounts of n-paraffins and isoparaffins that include a straight-chain propyl group (R1—CH2—CH2—CH2—R2). For such a straight-chain propyl group, R2 can correspond to any convenient CxHy group that can appear in a paraffin or isoparaffin. R1 can correspond to a hydrogen atom, making the straight-chain propyl group a terminal n-propyl group; or R1 can correspond to any convenient CxHy group that can appear in a paraffin or isoparaffin.Type: ApplicationFiled: October 20, 2017Publication date: May 17, 2018Inventors: Eugine CHOI, Matthew W. BOLAND, Zhisheng GAO, Luca SALVI, Shamel MERCHANT, Bruce W. CRAWLEY
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Publication number: 20180134978Abstract: Naphtha boiling range compositions are provided that can have improved combustion properties (relative to the research octane number of the composition) in spark ignition engines and/or compression ignition engines. The improved combustion properties can be achieved by controlling the total combined amounts of n-paraffins and isoparaffins that include a straight-chain propyl group (R1—CH2—CH2—CH2—R2). For such a straight-chain propyl group, R2 can correspond to any convenient CxHy group that can appear in a paraffin or isoparaffin. R1 can correspond to a hydrogen atom, making the straight-chain propyl group a terminal n-propyl group; or R1 can correspond to any convenient CxHy group that can appear in a paraffin or isoparaffin.Type: ApplicationFiled: October 20, 2017Publication date: May 17, 2018Inventors: Eugine CHOI, Matthew W. BOLAND, Zhisheng GAO, Luca SALVI, Shamel MERCHANT, Bruce W. CRAWLEY
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Publication number: 20180100115Abstract: Provided is a lubricating oil for electric and hybrid vehicles. The lubricating oil has a composition including at least 80 wt % of a lubricating base oil, from 0.8 to 5 wt % of one or more metal detergents, from 0 to 5 wt % of one or more dispersants, from 0 to 1.5 wt % of zinc dialkyldithiophosphate antiwear agent, from 0 to 0.2 wt % of a molybdenum dialkyldithiocarbamate, from 0 to 2 wt % of a viscosity modifier based on active ingredient, and from 0.01 to 5 wt % of other lubricating oil additives. The lubricating oil has an electrical conductivity from 3,000 to 20,000 pS/m, and kinematic viscosity from 2 to 20 cSt at 100° C. This disclosure also relates to methods for producing the lubricating oil, methods for lubricating electric and hybrid vehicles, and methods for controlling electrical conductivity of a lubricating oil by using conductivity promoters and conductivity inhibitors.Type: ApplicationFiled: October 5, 2017Publication date: April 12, 2018Inventors: Zhisheng Gao, Luca Salvi, Samuel Flores-Torres