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).

  • Publication number: 20220173448
    Abstract: 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: Application
    Filed: February 16, 2022
    Publication date: June 2, 2022
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daisuke TOKOZAKURA, Satoshi TOMINAGA, Yushi SEKI
  • Patent number: 11289747
    Abstract: 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: Grant
    Filed: July 11, 2018
    Date of Patent: March 29, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daisuke Tokozakura, Satoshi Tominaga, Yushi Seki
  • Publication number: 20220081602
    Abstract: 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: Application
    Filed: July 19, 2021
    Publication date: March 17, 2022
    Inventors: Yasuaki KODAMA, Masao WATANABE, Daisuke TOKOZAKURA
  • Publication number: 20220033700
    Abstract: 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: Application
    Filed: June 11, 2021
    Publication date: February 3, 2022
    Inventors: Yasuaki KODAMA, Masao WATANABE, Daisuke TOKOZAKURA
  • Patent number: 11235657
    Abstract: 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: Grant
    Filed: October 27, 2020
    Date of Patent: February 1, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Naoyuki Kishimoto, Daisuke Tokozakura, Satoshi Tominaga, Masaaki Katayama
  • Publication number: 20220018354
    Abstract: 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: Application
    Filed: July 1, 2021
    Publication date: January 20, 2022
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi TOMINAGA, Daisuke TOKOZAKURA, Yuki IWAMA, Hiroyuki SHIBATA
  • Patent number: 11214755
    Abstract: 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: Grant
    Filed: April 7, 2020
    Date of Patent: January 4, 2022
    Assignees: ENEOS CORPORATION, TOYOTA JIDOSHA KABUSHIKIKAISHA
    Inventors: Yohei Susukida, Takahiro Fukumizu, Takatoshi Shinyoshi, Daisuke Tokozakura
  • Publication number: 20210170858
    Abstract: 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: Application
    Filed: October 27, 2020
    Publication date: June 10, 2021
    Inventors: Naoyuki KISHIMOTO, Daisuke TOKOZAKURA, Satoshi TOMINAGA, Masaaki KATAYAMA
  • Publication number: 20210167666
    Abstract: 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: Application
    Filed: November 30, 2020
    Publication date: June 3, 2021
    Inventors: Junichi Deguchi, Eiji Yamada, Hiroyuki Hattori, Hiroaki Kodera, Daisuke Tokozakura, Satoshi Tominaga, Yuki Iwama
  • Publication number: 20210130672
    Abstract: 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: Application
    Filed: July 27, 2020
    Publication date: May 6, 2021
    Inventors: Yasuaki KODAMA, Masao WATANABE, Tomoharu KATAOKA, Daisuke TOKOZAKURA
  • Publication number: 20210062060
    Abstract: 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: Application
    Filed: July 27, 2020
    Publication date: March 4, 2021
    Inventors: Yasuaki KODAMA, Masao WATANABE, Tomoharu KATAOKA, Daisuke TOKOZAKURA
  • Publication number: 20210062059
    Abstract: 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: Application
    Filed: July 27, 2020
    Publication date: March 4, 2021
    Inventors: Yasuaki KODAMA, Masao WATANABE, Tomoharu KATAOKA, Daisuke TOKOZAKURA
  • Publication number: 20210062062
    Abstract: 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: Application
    Filed: July 27, 2020
    Publication date: March 4, 2021
    Inventors: Yasuaki KODAMA, Masao WATANABE, Tomoharu KATAOKA, Daisuke TOKOZAKURA
  • Patent number: 10938278
    Abstract: 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: Grant
    Filed: July 5, 2018
    Date of Patent: March 2, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi Tominaga, Daisuke Tokozakura, Yushi Seki
  • Publication number: 20200406783
    Abstract: 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: Application
    Filed: June 22, 2020
    Publication date: December 31, 2020
    Inventor: Daisuke TOKOZAKURA
  • Patent number: 10814696
    Abstract: A heat exchange system for a vehicle including a battery, an electric motor, and a transmission system is provided. The heat exchange system includes a heat pump, and a heat exchanger. The heat pump is used for air conditioning. The heat pump includes an electric compressor that compresses a refrigerant. The electric compressor is configured to be driven with electric power from the battery. The heat exchanger is configured to exchange heat between the refrigerant and lubricating oil that lubricates the transmission system.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: October 27, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Satoshi Tominaga, Daisuke Tokozakura, Hideki Kubonoya
  • Publication number: 20200332218
    Abstract: 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: Application
    Filed: April 7, 2020
    Publication date: October 22, 2020
    Applicants: JXTG NIPPON OIL & ENERGY CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yohei SUSUKIDA, Takahiro FUKUMIZU, Takatoshi SHINYOSHI, Daisuke TOKOZAKURA
  • Publication number: 20200292053
    Abstract: A vehicle lubrication structure includes a rotating electrical machine, a driving force transmission apparatus, a first reservoir, a second reservoir, a first oil path, a second oil path, and an electric oil pump. The second reservoir has a capacity smaller than that of the first reservoir. The first oil path connects the first reservoir to the second reservoir. The second oil path connects the second reservoir to the driving force transmission apparatus and the rotating electrical machine. The electric oil pump is configured to supply oil stored in the first reservoir to the driving force transmission apparatus and the rotating electrical machine. The electric oil pump is provided in the first oil path or the second oil path.
    Type: Application
    Filed: February 7, 2020
    Publication date: September 17, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Daisuke TOKOZAKURA
  • Patent number: 10710470
    Abstract: A coolant passage of a vehicular cooling system includes a battery coolant passage through which a coolant is supplied from a radiator to a battery, a discharge coolant passage through which the coolant is supplied to the radiator, a first bypass passage through which the coolant is supplied from the discharge coolant passage to the battery coolant passage while bypassing the radiator, and a switching valve that switches a pathway of the coolant, between a first pathway through which the coolant is supplied from the discharge coolant passage to the battery coolant passage via the radiator and a second pathway through which the coolant is supplied from the discharge coolant passage to the battery coolant passage via the first bypass passage. An electronic control unit controls the switching valve such that the pathway is switched to the second pathway at the time of increasing a temperature of the battery.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: July 14, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi Tominaga, Daisuke Tokozakura, Yushi Seki
  • Patent number: 10641555
    Abstract: A heat exchanger for a vehicle is mounted in a vehicle having a power train through which an engine coolant, an engine oil and a transmission oil flow and in which a flow rate of the engine oil and a flow rate of the transmission oil are different from each other. A first flow passage for causing the engine coolant to flow, a second flow passage for causing the engine oil to flow, and a third flow passage for causing the transmission oil to flow are formed through lamination of a plurality of plates. The heat exchanger includes a region where the first flow passage is adjacent only to that one of the second flow passage and the third flow passage through which a fluid flows at lower flow rate.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: May 5, 2020
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, MAHLE Filter Systems Japan Corporation
    Inventors: Daisuke Tokozakura, Takahiro Shiina, Satoshi Tominaga, Naoki Ooi, Katsuhiro Isoda