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: 20200127352
    Abstract: A battery cooling system includes: a circulation circuit configured to circulate common oil to a transaxle, a battery, and an oil cooler; a first electric oil pump that is disposed in a first oil passage; a second electric oil pump that is disposed in a second oil passage; and a controller configured to control the first electric oil pump and the second electric oil pump. The controller is configured to operate the first electric oil pump and stop the second electric oil pump when a temperature of the battery is equal to or lower than a first predetermined value, and stop the first electric oil pump and operate the second electric oil pump when the temperature of the battery is higher than the first predetermined value.
    Type: Application
    Filed: October 9, 2019
    Publication date: April 23, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Daisuke TOKOZAKURA
  • Patent number: 10519856
    Abstract: A power train includes: an engine including an engine case; a transmission including a transmission case that is fastened to the engine case; an electric motor provided inside the transmission case; and a heat insulator provided between the engine case and the transmission case, and being lower than thermal conductivity of the engine case and thermal conductivity of the transmission case.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: December 31, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi Tominaga, Daisuke Tokozakura, Takahiro Shiina
  • Patent number: 10443703
    Abstract: A lubrication control device for a transmission includes an oil pump, a heat exchanger, an oil quantity control valve, a first bypass oil passage, and an electronic control unit. The heat exchanger is connected between the oil pump and a lubricated portion of the transmission. The oil quantity control valve includes an inflow port, a supply port, and a discharge port. The supply port is connected to the heat exchanger. The oil quantity control valve is configured to control a supply oil quantity as a flow rate of the oil flowing from the inflow port to the supply port and discharge a residue of the oil from the discharge port. The first bypass oil passage is connected to the discharge port. The electronic control unit is configured to adjust the oil quantity control valve such that the supply oil quantity increases as a temperature of the oil increases.
    Type: Grant
    Filed: August 20, 2015
    Date of Patent: October 15, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daisuke Tokozakura, Kazuya Arakawa, Takahiro Shiina, Satoshi Tominaga
  • Patent number: 10442285
    Abstract: A cooling apparatus for a hybrid vehicle is provided with an oil circulating circuit supplying oil discharged from an electric oil pump to a first motor, a second motor, an inverter, and a lubrication-required part, and the oil circulating circuit includes: a first circuit supplying the oil that is discharged from the electric oil pump, and is cooled by an HV radiator to the inverter, the first motor, and the second motor; and a second circuit supplying the oil that is discharged from the electric oil pump without being cooled by the HV radiator to the lubrication-required part.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: October 15, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daisuke Tokozakura, Kazuya Arakawa, Takahiro Shiina
  • Patent number: 10287964
    Abstract: An cooling system including an oil circulation circuit includes a first circuit including an electric oil pump that discharges oil as a coolant to be supplied to an inverter and respective motors, and an HV radiator that cools the oil to be supplied to the inverter and the respective motors, and a second circuit including a mechanical oil pump that discharges the oil to be supplied to a lubrication-required part without passing through the HV radiator.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: May 14, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daisuke Tokozakura, Kazuya Arakawa, Takahiro Shiina
  • Publication number: 20190092186
    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: Application
    Filed: July 19, 2018
    Publication date: March 28, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi TOMINAGA, Daisuke TOKOZAKURA, Yushi SEKI
  • Publication number: 20190084373
    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: Application
    Filed: September 7, 2018
    Publication date: March 21, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi TOMINAGA, Daisuke TOKOZAKURA, Hideki KUBONOYA
  • Patent number: 10234016
    Abstract: A heat exchanging device includes: a heat exchanger configured to perform heat exchange between first operating oil used in an engine and second operating oil used in a fluid transmitting device and an automatic transmission; and a heat exchanging amount decreasing unit configured to, when a temperature of the second operating oil is lower than a predetermined temperature at which it is allowed to engage a lock-up mechanism, decrease a flow amount of at least one of the first and second operating oil flowing in the heat exchanger as compared to a case in which the temperature of the second operating oil is not lower than the predetermined temperature.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: March 19, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takahiro Shiina, Daisuke Tokozakura, Kazuya Arakawa
  • Publication number: 20190068028
    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: Application
    Filed: July 5, 2018
    Publication date: February 28, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi TOMINAGA, Daisuke TOKOZAKURA, Yushi SEKI
  • Publication number: 20190047364
    Abstract: In a cooling device for a vehicle capable of switching a circulation direction of a cooling medium by switching a rotation direction of a motor pump in a cooling circuit including a plurality of heat generation sources placed in series so as to allow the cooling medium to flow, an ECU includes switch means for switching the rotation direction of the motor pump, when determining that the temperature of a target heat generation source, out of the heat generation sources, is in a specified high temperature state, the target heat generation source being positioned at a most downstream side with respect to an outlet of a radiator in a circulation direction of the cooling medium at current time.
    Type: Application
    Filed: July 20, 2018
    Publication date: February 14, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Daisuke TOKOZAKURA
  • Publication number: 20190036181
    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: July 11, 2018
    Publication date: January 31, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daisuke TOKOZAKURA, Satoshi TOMINAGA, Yushi SEKI
  • Patent number: 10184733
    Abstract: A heat exchanger includes: a first flow passage where first liquid flows; a second flow passage where second liquid flows; and a heat exchanger main body configured to exchange heat between the first liquid and the second liquid. The heat exchanger main body includes a cross-sectional area adjuster configured to change a flow passage cross-sectional area of at least one of the first flow passage and the second flow passage by thermal deformation. The cross-sectional area adjuster adjusts a value of the flow passage cross-sectional area in a low temperature range to be larger than a value of the flow passage cross-sectional area in a high temperature range.
    Type: Grant
    Filed: December 27, 2015
    Date of Patent: January 22, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi Tominaga, Daisuke Tokozakura, Takahiro Shiina, Kazuya Arakawa, Hitoshi Takayama, Keisuke Ichige, Masanori Iritani
  • Patent number: 10107382
    Abstract: A vehicular drive system includes an engine having a first oil, a transmission having a second oil, and a heat exchanger 4 that exchanges heat between the first oil and the second oil. The magnitude of the amount of reduction of loss torque in the transmission per unit amount of reduction of the kinetic viscosity of the second oil is larger than the magnitude of the amount of increase of loss torque in the engine per unit amount increase of the kinetic viscosity of the first oil.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: October 23, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daisuke Tokozakura, Kazuya Arakawa, Takahiro Shiina
  • Publication number: 20180230901
    Abstract: A power train includes an engine including an engine case; a transmission including a transmission case that is fastened to the engine case; an electric motor provided inside the transmission case; and a heat insulator provided between the engine case and the transmission case, and being lower than thermal conductivity of the engine case and thermal conductivity of the transmission case.
    Type: Application
    Filed: February 12, 2018
    Publication date: August 16, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi TOMINAGA, Daisuke Tokozakura, Takahiro Shiina
  • Patent number: 10018102
    Abstract: A heat exchanger includes a plurality of plates that is stacked together to constitute first flow passages, second flow passage, third flow passage, fourth flow passage and fifth flow passage. An engine coolant flows through the first flow passages. An engine oil flows through the second flow passages and fourth flow passages. A transmission oil flows through the third flow passages and fifth flow passages. Triple-flow-passage arrangement layers in each of which each first, second, and third flow passages are disposed, and dual-flow-passage arrangement layers in each of which each fourth and fifth flow passages are disposed are alternately arranged such that flow passages of each same type are not overlaid with one another in a stacking direction of the plates.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: July 10, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daisuke Tokozakura, Kazuya Arakawa, Takahiro Shiina
  • Patent number: 10001210
    Abstract: A lubrication structure includes a liquid drop splashing device and an electret portion. The liquid drop splashing device is configured to turn a lubricating liquid for lubricating machine-element components into liquid drops. The liquid drop splashing device is configured to splash the lubricating liquid turned into the liquid drops. The machine-element components configure contact parts. Each contact part is a part where corresponding adjacent machine-element components come into contact with each other. An electret portion is provided to a vicinity of each contact part. The electret portion is composed of an electret.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: June 19, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keisuke Ichige, Masanori Iritani, Hitoshi Takayama, Takahiro Shiina, Daisuke Tokozakura, Satoshi Tominaga, Kazuya Arakawa
  • Patent number: 9957879
    Abstract: A heat exchanger includes: a first flow passage for an engine coolant; a second flow passage for an engine oil; a third flow passage for a transmission oil; and plural plates that partition the first, the second and the third flow passage. The first flow passage is configured to allow the engine coolant to be heat-exchanged with both the engine oil and the transmission oil via the plates. The second flow passage is arranged in the same layer with the third flow passage. The first flow passage is arranged in a different layer from the layer of the second and the third flow passage. The third flow passage is disposed on an upstream side and second flow passage is disposed on a downstream side in a flow direction of the engine coolant in the first flow passage.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: May 1, 2018
    Assignee: TOYOTA JIDOSHI KABUSHIKI KAISHA
    Inventors: Daisuke Tokozakura, Kazuya Arakawa, Takahiro Shiina
  • Publication number: 20180058766
    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: Application
    Filed: August 25, 2017
    Publication date: March 1, 2018
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, MAHLE Filter Systems Japan Corporation
    Inventors: Daisuke TOKOZAKURA, Takahiro Shiina, Satoshi Tominaga, Naoki Ooi, Katsuhiro Isoda
  • Patent number: 9856778
    Abstract: A heat exchanger includes first, second, third, and fourth passages. Engine coolant flows through the first passages. Engine oil flows through the second passages. Transmission oil flows through the fourth passages after flows through the third passages. Each first passage and each third passage is disposed in the same layer. Each second passage and each fourth passage is disposed in the same layer. Each first and each third passage are disposed in a different layer from the layer of each second and each fourths flow passage. Each fourth passage is disposed upstream of a first flow direction of the engine coolant in each first passage, and each second passage is disposed downstream of the first flow direction. Each third passage is disposed upstream of a second flow direction of the engine oil in each second passage, and each first passage is disposed downstream of the second flow direction.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: January 2, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daisuke Tokozakura, Kazuya Arakawa, Takahiro Shiina
  • Publication number: 20170241538
    Abstract: A lubrication control device for a transmission includes an oil pump, a heat exchanger, an oil quantity control valve, a first bypass oil passage, and an electronic control unit. The heat exchanger is connected between the oil pump and a lubricated portion of the transmission. The oil quantity control valve includes an inflow port, a supply port, and a discharge port. The supply port is connected to the heat exchanger. The oil quantity control valve is configured to control a supply oil quantity as a flow rate of the oil flowing from the inflow port to the supply port and discharge a residue of the oil from the discharge port. The first bypass oil passage is connected to the discharge port. The electronic control unit is configured to adjust the oil quantity control valve such that the supply oil quantity increases as a temperature of the oil increases.
    Type: Application
    Filed: August 20, 2015
    Publication date: August 24, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daisuke TOKOZAKURA, Kazuya ARAKAWA, Takahiro SHIINA, Satoshi TOMINAGA