Patents by Inventor Ryosuke OYA

Ryosuke OYA 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: 20220227966
    Abstract: A dispersion liquid contains modified silica particles that are obtained by reacting silica particles which are surface-treated with a compound A represented by Formula Si(RA)4-n(XA)n, which has a reactive group, with a compound B which has a functional group reacting with the reactive group to form a bond and has an organic group, an organic solvent, and water, in which a content of water is 0.1 to 20.0 mass % with respect to a total mass of the modified silica particles. In Formula A, RA represents a monovalent organic group including the reactive group, XA represents a hydroxyl group or a monovalent hydrolyzable group, and n represents an integer of 1 to 3.
    Type: Application
    Filed: March 29, 2022
    Publication date: July 21, 2022
    Applicant: FUJIFILM Corporation
    Inventors: Ryosuke KATO, Yushi KANEKO, Takahiro OYA, Yoshinori TAGUCHI
  • Publication number: 20220213296
    Abstract: A dispersion liquid contains an inorganic oxide particle surface-treated with at least one of a compound represented by Formula Si(RA1)(XA1)3 or a compound represented by Formula Si(RA2)(RA20)(XA2)2, polysiloxane having at least one of a T unit represented by Formula [RB1SiO3/2] or a D unit represented by Formula [RB2RB20SiO], and an organic solvent, where a content of the polysiloxane is 0.5% to 39% by mass with respect to a total amount of the inorganic oxide particle and the polysiloxane, in which in the formula, RA1, RA2, RB1, and RB2 represent a functional group, XA1 and XA2 represent a hydroxyl group or a hydrolyzable group, and RA20 and RB20 represent an alkyl group or an aryl group.
    Type: Application
    Filed: March 21, 2022
    Publication date: July 7, 2022
    Applicant: FUJIFILM Corporation
    Inventors: Yushi KANEKO, Ryosuke KATO, Takahiro OYA, Junichi ITO, Yoshinori TAGUCHI
  • Patent number: 11380913
    Abstract: A fuel cell system FCS includes a fuel cell 10, a high voltage circuit 21 for driving an electromotor 42, and a relay 41 for electrically connecting or blocking the fuel cell 10 to or from the high voltage circuit 21. A control unit 50 obtains insulation decrease information in accordance with a request for starting the fuel cell, and performs, when a specified insulation decrease occurred region is not a fuel cell region SE1 including the fuel cell and the cooling circuit, conductivity reduction process on cooling liquid using a conductivity reduction unit 113 before having a relay 41 connect, and has the relay 41 connect after completing the conductivity reduction process.
    Type: Grant
    Filed: December 2, 2020
    Date of Patent: July 5, 2022
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Ryosuke Oya
  • Publication number: 20220200085
    Abstract: A fuel cell system includes: a fuel cell; a fuel cell step-up converter having an input terminal, wherein the input terminal is connected to the fuel cell; a secondary cell; a secondary cell step-up converter having an input terminal an output terminal, wherein the input terminal is connected to the secondary cell.
    Type: Application
    Filed: December 8, 2021
    Publication date: June 23, 2022
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Ryosuke OYA
  • Patent number: 11283091
    Abstract: A fuel cell system includes a fuel cell, auxiliary machinery, a tank, a storage amount detection unit that detects a measured value representing the amount of fuel gas stored in the tank, a secondary battery, a power accumulation amount detection unit that detects an amount of power accumulated in the secondary battery, a feed detection unit, and a control unit. The control unit stops the supply of the fuel gas to the fuel cell when the measured value is less than a threshold value, electrically disconnects the secondary battery from the auxiliary machinery when the amount of accumulated power is less than a lower limit amount of accumulated power, and electrically connects the secondary battery to the auxiliary machinery after the feeding of the fuel gas to the tank is detected.
    Type: Grant
    Filed: January 27, 2020
    Date of Patent: March 22, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Ryosuke Oya
  • Publication number: 20210351424
    Abstract: A fuel cell system has a first boost converter of a fuel cell, a second boost converter of a secondary battery, and a control unit. Output sides of the first boost converter and the second boost converter are connected so as to be the same potential. The control unit is configured to, when detecting failure of the second boost converter, cause input and output sides of the second boost converter to conduct, estimate an open circuit voltage of the secondary battery based on a state of charge, and execute electric power consumption by an accessory that operates by electric power supplied from the fuel cell when determining that the first boost converter is not able to boost the output voltage of the fuel cell to the open circuit voltage, and stops the electric power consumption by the accessory when determining that the first boost converter is able to boost.
    Type: Application
    Filed: March 11, 2021
    Publication date: November 11, 2021
    Inventors: Ryosuke Oya, Kotomi Fujinaga, Shinobu Otsuka
  • Patent number: 11171349
    Abstract: A fuel cell vehicle comprises a fuel cell, a power storage device, a drive motor, a temperature sensor configured to measure a temperature of the fuel cell, a detector configured to detect an operation condition of the fuel cell, and a controller. At a start time of the fuel cell, in a case where the temperature of the fuel cell detected by the temperature sensor is below a freezing point, when an output condition of the fuel cell shown by the detected operation condition of the fuel cell continuously corresponds to a predetermined low output condition for a predetermined reference time period or longer, the controller sets a driving state of the fuel cell vehicle to a first driving state that stops power generation of the fuel cell, drives the drive motor by using only the power storage device as a power source and limits a motor output of the drive motor to be equal to or lower than a predetermined first upper limit output.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: November 9, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tomohiro Ogawa, Tomotaka Ishikawa, Shinji Asou, Tomio Yamanaka, Junichi Matsuo, Ryosuke Oya
  • Patent number: 11152629
    Abstract: The fuel cell system comprises a fuel gas tank, a fuel cell configured to generate electricity with oxidizing gas and fuel gas supplied from the fuel gas tank, a current sensor configured to detect output current from the fuel cell, a voltage sensor configured to detect output voltage from the fuel cell, and a controller. The controller is configured to determine that fuel gas quality does not meet predetermined standard quality when the controller determines output from the fuel cell has decreased using current values detected by the current sensor and voltage values detected by the voltage sensor after filling operation of the fuel gas into the fuel gas tank.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: October 19, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Ryosuke Oya
  • Publication number: 20210122382
    Abstract: A data collection system for inspection includes a communication unit that communicates with a plurality of vehicles, a selection unit that selects a plurality of target vehicles, and a data collection unit that collects the vehicle data of each target vehicle through the communication unit. The selection unit acquires vehicle environment information for each of the vehicles, assign the vehicle environment information to a plurality of classes, and for each class, obtains a frequency that is the number of the vehicles belonging to the class, and select the target vehicles for each class such that, of the classes, a ratio of the number of vehicles to be selected as the target vehicles to the frequency of each class is smaller in a first class having the frequency equal to or higher than a predetermined reference value than in a second class having the frequency less than the reference value.
    Type: Application
    Filed: July 21, 2020
    Publication date: April 29, 2021
    Inventors: Ryosuke OYA, Keiji KISHIDA
  • Publication number: 20210114468
    Abstract: The data recording apparatus includes a model storage configured to store a model generated by use of sample data indicating a measurement value of a sample and a degree of deterioration of the sample at the time when the measurement value is obtained, and a controller configured to acquire target data indicating a measurement value of a target and a degree of deterioration of the target at the time when the measurement value is obtained. The model storage stores a first model generated by use of the sample data relevant to the degree of deterioration of the sample belonging to a first range, and a second model generated by use of the sample data relevant to the degree of deterioration of the sample belonging to a second range partially overlapping with the first range.
    Type: Application
    Filed: September 22, 2020
    Publication date: April 22, 2021
    Inventors: Ryosuke OYA, Keiji KISHIDA
  • Publication number: 20210101492
    Abstract: A fuel cell system installed in a vehicle includes: a fuel cell; a secondary battery; a load including a drive motor and an air compressor; a fuel cell converter; a secondary battery converter; a failure detection unit; a first state determination unit; a reverse rotation detection unit; and a control unit. The control unit performs a limp-home traveling control that supplies electric power from the secondary battery to the drive motor when the secondary battery converter fails. When the vehicle is not in the first state, the control unit prohibits regeneration of the drive motor. When the vehicle is in the first state, the control unit supplies a reaction current to the air compressor. When the reaction current is applied and a reverse rotation of the air compressor is detected, the control unit does not apply the reaction current thereafter.
    Type: Application
    Filed: August 3, 2020
    Publication date: April 8, 2021
    Inventor: Ryosuke OYA
  • Publication number: 20210091391
    Abstract: A fuel cell system FCS includes a fuel cell 10, a high voltage circuit 21 for driving an electromotor 42, and a relay 41 for electrically connecting or blocking the fuel cell 10 to or from the high voltage circuit 21. A control unit 50 obtains insulation decrease information in accordance with a request for starting the fuel cell, and performs, when a specified insulation decrease occurred region is not a fuel cell region SE1 including the fuel cell and the cooling circuit, conductivity reduction process on cooling liquid using a conductivity reduction unit 113 before having a relay 41 connect, and has the relay 41 connect after completing the conductivity reduction process.
    Type: Application
    Filed: December 2, 2020
    Publication date: March 25, 2021
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Ryosuke OYA
  • Patent number: 10882406
    Abstract: A control device is configured to control a first boost converter and a second boost converter. The control device is configured such that, when a prescribed state where an output of the second boost converter cannot be made at a ratio of an output voltage to an input voltage in the second boost converter to be equal to or more than a predetermined value is detected, the control device calculates a target output voltage of a fuel cell by using an voltage on an input side or an output side of the second boost converter measured by a measuring portion and a first value which is equal to or larger than a minimum boost ratio of the first boost converter, and controls the fuel cell so that an output voltage of the fuel cell is equal to or lower than the target output voltage.
    Type: Grant
    Filed: April 2, 2018
    Date of Patent: January 5, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Ryosuke Oya
  • Patent number: 10886544
    Abstract: A fuel cell system FCS includes a fuel cell 10, a high voltage circuit 21 for driving an electromotor 42, and a relay 41 for electrically connecting or blocking the fuel cell 10 to or from the high voltage circuit 21. A control unit 50 obtains insulation decrease information in accordance with a request for starting the fuel cell, and performs, when a specified insulation decrease occurred region is not a fuel cell region SE1 including the fuel cell and the cooling circuit, conductivity reduction process on cooling liquid using a conductivity reduction unit 113 before having a relay 41 connect, and has the relay 41 connect after completing the conductivity reduction process.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: January 5, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Ryosuke Oya
  • Patent number: 10777827
    Abstract: A technique that suppresses excessive water drainage from a fuel cell is provided. A water drainage device that drains water from inside of a fuel cell includes: a purge gas supply system; an operation unit; a water drainage controller; and a water content acquirer. The operation unit receives a water drainage command from a water drainage switch configured to control execution of a purge process by the purge gas supply system. When the water content obtained by the water content acquirer is equal to or lower than a predetermined value, the water drainage controller performs either one of: (i) invalidating the received water drainage command; and (ii) changing a processing condition of the purge process to decrease an amount of water drained by the purge process, compared with an amount of water drainage when the obtained water content is higher than the predetermined value.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: September 15, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomohiro Ogawa, Ryosuke Oya, Tomohiko Kaneko, Mitsuhiro Nada, Yoshiaki Naganuma
  • Publication number: 20200243886
    Abstract: A fuel cell system includes a fuel cell, auxiliary machinery, a tank, a storage amount detection unit that detects a measured value representing the amount of fuel gas stored in the tank, a secondary battery, a power accumulation amount detection unit that detects an amount of power accumulated in the secondary battery, a feed detection unit, and a control unit. The control unit stops the supply of the fuel gas to the fuel cell when the measured value is less than a threshold value, electrically disconnects the secondary battery from the auxiliary machinery when the amount of accumulated power is less than a lower limit amount of accumulated power, and electrically connects the secondary battery to the auxiliary machinery after the feeding of the fuel gas to the tank is detected.
    Type: Application
    Filed: January 27, 2020
    Publication date: July 30, 2020
    Inventor: Ryosuke OYA
  • Patent number: 10727554
    Abstract: When an overvoltage is generated in one converter and an overvoltage is not generated in another converter, the whole system continues to operate using a power source connected to the other converter. Here, it is determined whether a reason for an overvoltage is an open-circuit fault in a relay connecting the two converters or a fault in an overvoltage detecting circuit of one converter, and system control suitable for the fault is performed.
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: July 28, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Ryosuke Oya
  • Publication number: 20200075973
    Abstract: The fuel cell system comprises a fuel gas tank, a fuel cell configured to generate electricity with oxidizing gas and fuel gas supplied from the fuel gas tank, a current sensor configured to detect output current from the fuel cell, a voltage sensor configured to detect output voltage from the fuel cell, and a controller. The controller is configured to determine that fuel gas quality does not meet predetermined standard quality when the controller determines output from the fuel cell has decreased using current values detected by the current sensor and voltage values detected by the voltage sensor after filling operation of the fuel gas into the fuel gas tank.
    Type: Application
    Filed: July 31, 2019
    Publication date: March 5, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Ryosuke OYA
  • Publication number: 20200036018
    Abstract: A fuel cell system includes a fuel cell, an anode gas supply system, an anode gas circulatory system, a cathode gas supply-discharge system, a gas-liquid discharge passage, a gas-liquid discharge valve configured to open and close the gas-liquid discharge passage, a flow-rate acquisition portion, and a controlling portion. After the controlling portion instructs the gas-liquid discharge valve to be opened, the controlling portion executes a normal-abnormality determination such that, when a discharge-gas flow rate of anode gas is a predetermined normal reference value or more, the controlling portion determines that the gas-liquid discharge valve is opened normally, and when the discharge-gas flow rate is lower than the normal reference value, the controlling portion determines that the gas-liquid discharge valve is not opened normally.
    Type: Application
    Filed: July 19, 2019
    Publication date: January 30, 2020
    Inventors: Tomio YAMANAKA, Tomotaka ISHIKAWA, Tomohiro OGAWA, Ryosuke OYA, Junichi MATSUO
  • Publication number: 20200036023
    Abstract: A fuel cell vehicle comprises a fuel cell, a power storage device, a drive motor, a temperature sensor configured to measure a temperature of the fuel cell, a detector configured to detect an operation condition of the fuel cell, and a controller. At a start time of the fuel cell, in a case where the temperature of the fuel cell detected by the temperature sensor is below a freezing point, when an output condition of the fuel cell shown by the detected operation condition of the fuel cell continuously corresponds to a predetermined low output condition for a predetermined reference time period or longer, the controller sets a driving state of the fuel cell vehicle to a first driving state that stops power generation of the fuel cell, drives the drive motor by using only the power storage device as a power source and limits a motor output of the drive motor to be equal to or lower than a predetermined first upper limit output.
    Type: Application
    Filed: June 12, 2019
    Publication date: January 30, 2020
    Inventors: Tomohiro OGAWA, Tomotaka ISHIKAWA, Shinji ASOU, Tomio YAMANAKA, Junichi MATSUO, Ryosuke OYA