Patents by Inventor Daisuke Tokozakura
Daisuke Tokozakura 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: 11585352Abstract: A seal structure of a drive device is provided which includes a case in which a motor chamber for accommodating an electric motor and a gear chamber for accommodating a gear mechanism are located adjacent to each other, a partition that separates the motor chamber and the gear chamber, a bearing that supports a rotating shaft, a seal part that seals between the rotating shaft and the partition, a lubricating oil that lubricates the gear mechanism, and a coolant that cools the electric motor, and also includes a first bearing on the motor chamber side, a second bearing on the gear chamber side, a first seal part on the motor chamber side, a second seal part on the gear chamber side, and at least the second seal part of the first seal part and the second seal part is provided between the first bearing and the second bearing.Type: GrantFiled: July 1, 2021Date of Patent: February 21, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Satoshi Tominaga, Daisuke Tokozakura, Yuki Iwama, Hiroyuki Shibata
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Patent number: 11518273Abstract: A cooling device for a vehicle, includes a cooling circuit including a first circuit in which a cooling liquid circulates through a power control unit and a second circuit connected in parallel with the first circuit and in which the cooling liquid circulates through a battery without passing through the power control unit; and a flow-rate control unit that controls a proportion of a flow rate of the cooling liquid between the first circuit and the second circuit, and when the battery is being charged with the electric power of the external power supply, the control unit controls so that the flow rate of the cooling liquid flowing through the second circuit is greater than the flow rate of the cooling liquid flowing through the first circuit on a side of the power control unit.Type: GrantFiled: June 22, 2020Date of Patent: December 6, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Daisuke Tokozakura
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Patent number: 11518923Abstract: This disclosure provides a nonaqueous coolant composition excellent in insulation property, heat transfer characteristic, and hydrolysis resistance. The embodiment is a coolant composition that includes at least one ketone compound having 6 or more carbon atoms as a nonaqueous base and is substantially free of water.Type: GrantFiled: July 27, 2020Date of Patent: December 6, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yasuaki Kodama, Masao Watanabe, Tomoharu Kataoka, Daisuke Tokozakura
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Patent number: 11447678Abstract: This disclosure provides a nonaqueous coolant composition that is excellent in insulation property and heat resistance and has improved heat transfer characteristics. The embodiment is a coolant composition that includes at least one ether compound having 6 or more carbon atoms as a nonaqueous base and is substantially free of water.Type: GrantFiled: July 27, 2020Date of Patent: September 20, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yasuaki Kodama, Masao Watanabe, Tomoharu Kataoka, Daisuke Tokozakura
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Publication number: 20220295675Abstract: Provided is a cooling system that includes a first cooling passage in which a first cooling object is cooled by first coolant, a flow passage that supplies the first coolant to a second cooling object from the first cooling passage, a flow rate regulation mechanism that regulates a flow rate of the first coolant flowing in the first cooling passage, and a controller that controls the flow rate regulation mechanism. The controller controls the flow rate regulation mechanism so that the flow rate of the first coolant flowing in the first cooling passage is lower when temperature of the first cooling object is lower than temperature of the first coolant, than the flow rate when the temperature of the first cooling object is equal to or higher than the temperature of the first coolant.Type: ApplicationFiled: February 18, 2022Publication date: September 15, 2022Inventors: Masaaki Katayama, Naoyuki Kishimoto, Daisuke Tokozakura, Satoshi Tominaga
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Publication number: 20220173448Abstract: A battery cooling system includes: a cooling circuit; a power transmission device disposed in the cooling circuit, the power transmission device including a gear; a drivetrain oil having an electric insulating property and being used for lubrication of the gear, the drivetrain oil circulating in the cooling circuit; a battery unit disposed in the cooling circuit, the battery unit including a module case that houses a plurality of battery cells; a pump disposed in the cooling circuit; and a radiator disposed in the cooling circuit, the radiator releasing heat from the drivetrain oil flowing in the cooling circuit. The drivetrain oil performs direct heat exchange inside the power transmission device and flows through an inside of the module case and performs direct heat exchange with the battery cells.Type: ApplicationFiled: February 16, 2022Publication date: June 2, 2022Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daisuke TOKOZAKURA, Satoshi TOMINAGA, Yushi SEKI
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Patent number: 11289747Abstract: A battery cooling system includes: a cooling circuit; a power transmission device disposed in the cooling circuit, the power transmission device including a gear; a drivetrain oil having an electric insulating property and being used for lubrication of the gear, the drivetrain oil circulating in the cooling circuit; a battery unit disposed in the cooling circuit, the battery unit including a module case that houses a plurality of battery cells; a pump disposed in the cooling circuit; and a radiator disposed in the cooling circuit, the radiator releasing heat from the drivetrain oil flowing in the cooling circuit. The drivetrain oil performs direct heat exchange inside the power transmission device and flows through an inside of the module case and performs direct heat exchange with the battery cells.Type: GrantFiled: July 11, 2018Date of Patent: March 29, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daisuke Tokozakura, Satoshi Tominaga, Yushi Seki
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Publication number: 20220081602Abstract: An object of the present disclosure is to provide a non-aqueous coolant composition having all of excellent insulation property, cooling capability, and flame resistance. This embodiment is a non-water coolant composition that comprises at least one halogen-based flame retardant selected from a fluorine-based oil and a chlorinated paraffin.Type: ApplicationFiled: July 19, 2021Publication date: March 17, 2022Inventors: Yasuaki KODAMA, Masao WATANABE, Daisuke TOKOZAKURA
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Publication number: 20220033700Abstract: It is an object of the present disclosure to provide a non-aqueous coolant composition that is excellent in insulation property and has improved heat transfer characteristics. The embodiment is a non-water coolant composition that comprises at least one amine compound as a non-aqueous base. The amine compound is at least one selected from the group consisting of an aliphatic amine compound, an aromatic amine compound, an alkanolamine compound, an amido amine compound, an amine oxide compound, a heterocyclic amine compound, and an ether amine compound.Type: ApplicationFiled: June 11, 2021Publication date: February 3, 2022Inventors: Yasuaki KODAMA, Masao WATANABE, Daisuke TOKOZAKURA
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Patent number: 11235657Abstract: A cooling system for a powertrain includes: a rotating electrical machine unit including a rotating electrical machine; and a power control unit configured to drive the rotating electrical machine. The cooling system includes: a radiator configured to cool a refrigerant; a refrigerant circulation circuit configured to supply the refrigerant flowing out from the radiator to a second cooled portion via a first cooled portion; a bypass flow path bypassing the second cooled portion; a flow control valve configured to adjust the ratio of a second refrigerant flow rate to a first refrigerant flow rate; and a control device configured to control the flow control valve. The control mode of the flow control valve includes a flow rate limiting mode in which the flow control valve is controlled to adjust the ratio such that the second refrigerant flow rate becomes less than the first refrigerant flow rate.Type: GrantFiled: October 27, 2020Date of Patent: February 1, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Naoyuki Kishimoto, Daisuke Tokozakura, Satoshi Tominaga, Masaaki Katayama
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Publication number: 20220018354Abstract: A seal structure of a drive device is provided which includes a case in which a motor chamber for accommodating an electric motor and a gear chamber for accommodating a gear mechanism are located adjacent to each other, a partition that separates the motor chamber and the gear chamber, a bearing that supports a rotating shaft, a seal part that seals between the rotating shaft and the partition, a lubricating oil that lubricates the gear mechanism, and a coolant that cools the electric motor, and also includes a first bearing on the motor chamber side, a second bearing on the gear chamber side, a first seal part on the motor chamber side, a second seal part on the gear chamber side, and at least the second seal part of the first seal part and the second seal part is provided between the first bearing and the second bearing.Type: ApplicationFiled: July 1, 2021Publication date: January 20, 2022Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Satoshi TOMINAGA, Daisuke TOKOZAKURA, Yuki IWAMA, Hiroyuki SHIBATA
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Patent number: 11214755Abstract: A lubricating oil composition including: a lubricating base oil; (A) a poly(meth)acrylate having a weight average molecular weight of no more than 50,000, in an amount of 2 to 10 mass %; (B) a phosphite ester of the general formula (1) in an amount of 0.01 to 0.06 mass % in terms of P; (C) a thiadiazole compound in an amount of 0.01 to 0.2 mass %; and (D) a Ca salicylate detergent in an amount of 0.005 to 0.03 mass % in terms of Ca, wherein the lubricating oil composition has a kinematic viscosity at 40° C. of 4.0 to 20.0 mm2/s, and a kinematic viscosity at 100° C. of 1.8 to 5.2 mm2/s; and has a ratio [S]/[P] of 2.2 to 4.0, wherein the [S] represents a sulfur content, and the [P] represents a phosphorus content: wherein R1 and R2 are each independently a group having 5 to 20 carbons represented by the general formula (2); and wherein R3 is a C2-17 linear chain hydrocarbon group, and R4 is a C2-17 linear chain hydrocarbon group.Type: GrantFiled: April 7, 2020Date of Patent: January 4, 2022Assignees: ENEOS CORPORATION, TOYOTA JIDOSHA KABUSHIKIKAISHAInventors: Yohei Susukida, Takahiro Fukumizu, Takatoshi Shinyoshi, Daisuke Tokozakura
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Publication number: 20210170858Abstract: A cooling system for a powertrain includes: a rotating electrical machine unit including a rotating electrical machine; and a power control unit configured to drive the rotating electrical machine. The cooling system includes: a radiator configured to cool a refrigerant; a refrigerant circulation circuit configured to supply the refrigerant flowing out from the radiator to a second cooled portion via a first cooled portion; a bypass flow path bypassing the second cooled portion; a flow control valve configured to adjust the ratio of a second refrigerant flow rate to a first refrigerant flow rate; and a control device configured to control the flow control valve. The control mode of the flow control valve includes a flow rate limiting mode in which the flow control valve is controlled to adjust the ratio such that the second refrigerant flow rate becomes less than the first refrigerant flow rate.Type: ApplicationFiled: October 27, 2020Publication date: June 10, 2021Inventors: Naoyuki KISHIMOTO, Daisuke TOKOZAKURA, Satoshi TOMINAGA, Masaaki KATAYAMA
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Publication number: 20210167666Abstract: A cooling device cools a motor mounted on a vehicle and an inverter driving the motor. The cooling device includes: a common flow path through which coolant flows; a first flow path branching from the common flow path and arranged to cool the inverter and a stator of the motor; and a second flow path branching from the common flow path, being independent of the first flow path, and arranged to cool a rotor of the motor. The cooling device further includes a distribution structure configured to distribute the coolant to the first flow path and the second flow path, and to change a distribution ratio of a first coolant distributed to the first flow path out of the coolant and a second coolant distributed to the second flow path out of the coolant.Type: ApplicationFiled: November 30, 2020Publication date: June 3, 2021Inventors: Junichi Deguchi, Eiji Yamada, Hiroyuki Hattori, Hiroaki Kodera, Daisuke Tokozakura, Satoshi Tominaga, Yuki Iwama
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Publication number: 20210130672Abstract: This disclosure provides a nonaqueous coolant composition that is excellent in insulation property and heat resistance and has improved heat transfer characteristics. The embodiment is a coolant composition that includes at least one ether compound having 6 or more carbon atoms as a nonaqueous base and is substantially free of water.Type: ApplicationFiled: July 27, 2020Publication date: May 6, 2021Inventors: Yasuaki KODAMA, Masao WATANABE, Tomoharu KATAOKA, Daisuke TOKOZAKURA
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Publication number: 20210062060Abstract: This disclosure provides a nonaqueous coolant composition excellent in insulation property, heat transfer characteristic, and rubber compatibility. The embodiment is a coolant composition that includes at least one saturated hydrocarbon compound having 6 or more carbon atoms as a nonaqueous base and is substantially free of water.Type: ApplicationFiled: July 27, 2020Publication date: March 4, 2021Inventors: Yasuaki KODAMA, Masao WATANABE, Tomoharu KATAOKA, Daisuke TOKOZAKURA
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Publication number: 20210062059Abstract: This disclosure provides a nonaqueous coolant composition excellent in insulation property and heat transfer characteristic. The embodiment is a coolant composition that includes at least one carboxylic acid ester compound as a nonaqueous base and is substantially free of water.Type: ApplicationFiled: July 27, 2020Publication date: March 4, 2021Inventors: Yasuaki KODAMA, Masao WATANABE, Tomoharu KATAOKA, Daisuke TOKOZAKURA
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Publication number: 20210062062Abstract: This disclosure provides a nonaqueous coolant composition excellent in insulation property, heat transfer characteristic, and hydrolysis resistance. The embodiment is a coolant composition that includes at least one ketone compound having 6 or more carbon atoms as a nonaqueous base and is substantially free of water.Type: ApplicationFiled: July 27, 2020Publication date: March 4, 2021Inventors: Yasuaki KODAMA, Masao WATANABE, Tomoharu KATAOKA, Daisuke TOKOZAKURA
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Patent number: 10938278Abstract: There are provided in-wheel motors lubricated with an oil; a cooling medium circuit in which a cooling medium flows; a cooling device cooling the cooling medium; heat exchangers carrying out heat exchange between the cooling medium and the oil after lubricating the in-wheel motors; and at least one of a controller including an inverter and a battery that can be cooled by the cooling medium flowing through the cooling medium circuit, and the cooling medium circuit has such a configuration that circulates the cooling medium through the cooling device, at least one of the controller and the battery, and the heat exchangers in turn.Type: GrantFiled: July 5, 2018Date of Patent: March 2, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Satoshi Tominaga, Daisuke Tokozakura, Yushi Seki
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Publication number: 20200406783Abstract: A cooling device for a vehicle, includes a cooling circuit including a first circuit in which a cooling liquid circulates through a power control unit and a second circuit connected in parallel with the first circuit and in which the cooling liquid circulates through a battery without passing through the power control unit; and a flow-rate control unit that controls a proportion of a flow rate of the cooling liquid between the first circuit and the second circuit, and when the battery is being charged with the electric power of the external power supply, the control unit controls so that the flow rate of the cooling liquid flowing through the second circuit is greater than the flow rate of the cooling liquid flowing through the first circuit on a side of the power control unit.Type: ApplicationFiled: June 22, 2020Publication date: December 31, 2020Inventor: Daisuke TOKOZAKURA