Patents by Inventor Takuto NAKAGAWA

Takuto NAKAGAWA 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).

  • Patent number: 11804614
    Abstract: The power supply system includes: a fuel cell, capable of generating power; a power storage device, storing power generated by the fuel cell; and a control device, controlling at least the fuel cell. The control device, under a tendency that power consumption of a load at least connected with the fuel cell and the power storage device decreases, determines a first lower limit power based on power generated by the fuel cell before a predetermined time, causes the fuel cell to generate second power equal to or greater than the first lower limit power when first power generated by the fuel cell determined based on a power supplied to the load drops below the first lower limit power, and determines the first lower limit power with a tendency that the greater the generated power, the greater a difference between the generated power and the first lower limit power is increased.
    Type: Grant
    Filed: September 9, 2021
    Date of Patent: October 31, 2023
    Assignee: Honda Motor Co., Ltd.
    Inventors: Ryoji Sakai, Takuto Nakagawa
  • Patent number: 11791481
    Abstract: An ECU of a fuel cell system determines whether or not temperature information exceeds a temperature threshold for determination when receiving a signal related to power generation stop of a fuel cell stack during operation of a moving body. When the temperature information exceeds the determination temperature threshold, the ECU performs a stop control for stopping power generation of the fuel cell stack. On the other hand, when the temperature information is equal to or lower than the determination temperature threshold, the ECU performs an idle control for generating electric power smaller than electric power consumed by the air pump.
    Type: Grant
    Filed: January 10, 2022
    Date of Patent: October 17, 2023
    Assignee: Honda Motor Co., Ltd.
    Inventors: Ryoji Sakai, Takuto Nakagawa, Sho Akabori, Tomoyuki Inoue
  • Publication number: 20230311714
    Abstract: A fuel cell system includes a fuel cell and a secondary battery used as power sources of a power supply target object, and a control device for controlling driving of the power supply target object. The control device determines whether a predetermined condition required for activation of the fuel cell is satisfied, permits a battery-driven mode in which the power supply target object is driven using only the secondary battery when the predetermined condition is satisfied, and prohibits the battery-driven mode when the predetermined condition is not satisfied.
    Type: Application
    Filed: March 23, 2023
    Publication date: October 5, 2023
    Inventors: Sho AKABORI, Takuto NAKAGAWA
  • Publication number: 20230290975
    Abstract: A control unit of a fuel cell system estimates an amount of nitrogen in an anode flow field, performs a first comparison by comparing the estimated amount of nitrogen with a first threshold amount, performs a second comparison by comparing a target power generation amount as a target amount of power generation by a fuel cell stack with a second threshold amount in a case where the estimated amount of nitrogen in the anode flow field exceeds the first threshold amount in the first comparison, and controls opening and closing of a first valve and opening and closing of the second valve based on a result of the first comparison and a result of the second comparison.
    Type: Application
    Filed: February 21, 2023
    Publication date: September 14, 2023
    Inventors: Kazuhide INOUE, Kazusa KOGA, Takuto NAKAGAWA
  • Publication number: 20230290968
    Abstract: A control unit of a fuel cell system opens a second valve at the time of closing a first valve, and maintains the same operating state of a compressor before closing the first valve and after opening the second valve.
    Type: Application
    Filed: February 22, 2023
    Publication date: September 14, 2023
    Inventors: Kazuhide INOUE, Kazusa KOGA, Takuto NAKAGAWA
  • Publication number: 20230290980
    Abstract: A control unit of a fuel cell system measures or estimates an amount of nitrogen in an anode flow field, performs a first comparison by comparing the amount of nitrogen with the first threshold amount, performs a second comparison by comparing a differential pressure calculated by subtracting a cathode pressure value indicating a pressure inside a cathode flow field from an anode pressure value indicating a pressure inside the anode flow field with the second threshold pressure when the amount of nitrogen in the anode flow field is greater than the first threshold amount in the first comparison, and controls opening and closing of a valve based on the result of the first comparison and the result of the second comparison.
    Type: Application
    Filed: February 22, 2023
    Publication date: September 14, 2023
    Inventors: Kazuhide INOUE, Kazusa KOGA, Takuto NAKAGAWA
  • Patent number: 11757114
    Abstract: A control unit estimates a discharged fuel gas amount, i.e., an amount of fuel gas discharged from the outlet of a cathode flow field, of a fuel exhaust gas introduced from a communication flow path to the inlet of the cathode flow field and then flowing through a cathode. The control unit calculates an oxygen-containing gas amount necessary for dilution at the time of discharge into the atmosphere, from the estimated discharged fuel gas amount, and sets a discharge amount of the air pump, based on the calculated oxygen-containing gas amount.
    Type: Grant
    Filed: February 27, 2022
    Date of Patent: September 12, 2023
    Assignee: Honda Motor Co., Ltd.
    Inventors: Kazuhide Inoue, Takuto Nakagawa, Manabu Iwaida, Kiyohide Hibino, Atsushi Kamachi, Akane Goto
  • Publication number: 20230178768
    Abstract: A fuel cell system performs a first control of stopping power generation of a fuel cell stack by closing a supply-side stop valve during power generation of the fuel cell stack, and a second control of driving an air pump by using surplus power generated in a moving body to thereby discard the surplus power. If a closed state of the supply-side stop valve is detected when the first control and the second control start to be executed, the air pump is driven in a predetermined state.
    Type: Application
    Filed: December 1, 2022
    Publication date: June 8, 2023
    Inventors: Takuma SONOBE, Ryoji SAKAI, Sho AKABORI, Takuto NAKAGAWA
  • Publication number: 20220320552
    Abstract: When controlling the power generation state of a fuel cell stack based on a generated current command value, a control device sets the generated current command value based on a generated power command value and a generated voltage acquired by a voltage sensor such that the following expression is satisfied, regardless of whether a bleed valve is opened or closed: generated current command value=generated power command value/generated voltage.
    Type: Application
    Filed: February 24, 2022
    Publication date: October 6, 2022
    Inventors: Ryoji SAKAI, Kazuhide INOUE, Takuto NAKAGAWA
  • Publication number: 20220302476
    Abstract: A control unit estimates a discharged fuel gas amount, i.e., an amount of fuel gas discharged from the outlet of a cathode flow field, of a fuel exhaust gas introduced from a communication flow path to the inlet of the cathode flow field and then flowing through a cathode. The control unit calculates an oxygen-containing gas amount necessary for dilution at the time of discharge into the atmosphere, from the estimated discharged fuel gas amount, and sets a discharge amount of the air pump, based on the calculated oxygen-containing gas amount.
    Type: Application
    Filed: February 27, 2022
    Publication date: September 22, 2022
    Inventors: Kazuhide INOUE, Takuto NAKAGAWA, Manabu IWAIDA, Kiyohide HIBINO, Atsushi KAMACHI, Akane GOTO
  • Publication number: 20220223883
    Abstract: An ECU of a fuel cell system determines whether or not temperature information exceeds a temperature threshold for determination when receiving a signal related to power generation stop of a fuel cell stack during operation of a moving body. When the temperature information exceeds the determination temperature threshold, the ECU performs a stop control for stopping power generation of the fuel cell stack. On the other hand, when the temperature information is equal to or lower than the determination temperature threshold, the ECU performs an idle control for generating electric power smaller than electric power consumed by the air pump.
    Type: Application
    Filed: January 10, 2022
    Publication date: July 14, 2022
    Inventors: Ryoji SAKAI, Takuto NAKAGAWA, Sho AKABORI, Tomoyuki INOUE
  • Publication number: 20220123337
    Abstract: The power supply system includes: a fuel cell, capable of generating power; a power storage device, storing power generated by the fuel cell; and a control device, controlling at least the fuel cell. The control device, under a tendency that power consumption of a load at least connected with the fuel cell and the power storage device decreases, determines a first lower limit power based on power generated by the fuel cell before a predetermined time, causes the fuel cell to generate second power equal to or greater than the first lower limit power when first power generated by the fuel cell determined based on a power supplied to the load drops below the first lower limit power, and determines the first lower limit power with a tendency that the greater the generated power, the greater a difference between the generated power and the first lower limit power is increased.
    Type: Application
    Filed: September 9, 2021
    Publication date: April 21, 2022
    Applicant: Honda Motor Co., Ltd.
    Inventors: Ryoji SAKAI, Takuto NAKAGAWA
  • Patent number: 11211623
    Abstract: A drive upper limit electrical energy for an air compressor is set variably in correspondence with vehicle velocity Vv. In this manner, for example, surplus power generation electrical energy of a fuel cell stack is consumed (discarded) by the air compressor in a range where NV (noise and vibration) of the air compressor does not give passengers any sense of discomfort.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: December 28, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Kuniaki Ojima, Takuto Nakagawa
  • Patent number: 11091058
    Abstract: A fuel cell system includes a FC, a TRC, an oxygen-containing gas supply apparatus, a battery, and an ECU. The ECU is capable of performing power consumption control which allows the oxygen-containing gas supply apparatus to consume electrical energy during regeneration of the TRC. The ECU is configured to determine a charge margin with respect to a charge limitation value of the battery, in a manner that the charge margin set after the power consumption control starts becomes smaller than the charge margin set before the power consumption control is performed.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: August 17, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Shingo Takamoto, Akio Futatsudera, Akihiro Matsui, Kuniaki Ojima, Takuto Nakagawa, Takuya Shirasaka, Kosuke Higashitani
  • Patent number: 10892501
    Abstract: A fuel cell system includes a fuel gas leakage sensor provided in a housing chamber to detect leakage of a fuel gas from a fuel cell to an inside of a housing chamber. Circuitry is configured to close at least one of a first valve and a second valve when the fuel gas leakage sensor detects the leakage of the fuel gas. The circuitry is configured to control the fuel cell to generate electric power using the fuel gas in the fuel cell while the at least one of the first valve device and the second valve device is closed when the fuel gas leakage sensor detects the leakage of the fuel gas.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: January 12, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Takuto Nakagawa, Kenji Taruya, Tomohisa Kamiyama
  • Patent number: 10629971
    Abstract: A fuel cell vehicle includes a fuel cell, a first electric component, a second electric component, a battery, a first switch, a second switch, and circuitry. The first electric component is to operate the fuel cell. The second electric component is not to be used to operate the fuel cell. The first switch is to electrically connect the first electric component to the battery to supply electric power from the battery to the first electric component. The second switch is to electrically connect the second electric component to the battery to supply electric power from the battery to the second electric component. The circuitry is configured to control the first switch to electrically connect the first electric component to the battery and to control the second switch not to electrically connect the second electric component to the battery when the fuel cell is started.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: April 21, 2020
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Yuji Matsumoto, Takuto Nakagawa
  • Publication number: 20190255969
    Abstract: A fuel cell system includes a FC, a TRC, an oxygen-containing gas supply apparatus, a battery, and an ECU. The ECU is capable of performing power consumption control which allows the oxygen-containing gas supply apparatus to consume electrical energy during regeneration of the TRC. The ECU is configured to determine a charge margin with respect to a charge limitation value of the battery, in a manner that the charge margin set after the power consumption control starts becomes smaller than the charge margin set before the power consumption control is performed.
    Type: Application
    Filed: February 12, 2019
    Publication date: August 22, 2019
    Inventors: Shingo Takamoto, Akio Futatsudera, Akihiro Matsui, Kuniaki Ojima, Takuto Nakagawa, Takuya Shirasaka, Kosuke Higashitani
  • Publication number: 20190229357
    Abstract: A drive upper limit electrical energy for an air compressor is set variably in correspondence with vehicle velocity Vv. In this manner, for example, surplus power generation electrical energy of a fuel cell stack is consumed (discarded) by the air compressor in a range where NV (noise and vibration) of the air compressor does not give passengers any sense of discomfort.
    Type: Application
    Filed: January 17, 2019
    Publication date: July 25, 2019
    Inventors: Kuniaki Ojima, Takuto Nakagawa
  • Patent number: 10059225
    Abstract: A fuel cell vehicle includes a lid, a switch, a sensor, and circuitry. The lid opens and closes a fuel inlet through which fuel gas is to be supplied to a tank. The switch takes an opening position to open the lid and a closing position to close the lid. The sensor detects whether the lid opens or closes the fuel inlet. The circuitry is configured to prohibit the fuel cell vehicle from travelling when the sensor detects that the lid opens the fuel inlet while the switch takes the opening position.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: August 28, 2018
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Takuto Nakagawa, Tomoaki Nakagawa, Kenji Taruya, Kuniaki Ojima
  • Publication number: 20170355279
    Abstract: A fuel cell vehicle includes a fuel cell, a first electric component, a second electric component, a battery, a first switch, a second switch, and circuitry. The first electric component is to operate the fuel cell. The second electric component is not to be used to operate the fuel cell. The first switch is to electrically connect the first electric component to the battery to supply electric power from the battery to the first electric component. The second switch is to electrically connect the second electric component to the battery to supply electric power from the battery to the second electric component. The circuitry is configured to control the first switch to electrically connect the first electric component to the battery and to control the second switch not to electrically connect the second electric component to the battery when the fuel cell is started.
    Type: Application
    Filed: May 17, 2017
    Publication date: December 14, 2017
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Yuji MATSUMOTO, Takuto NAKAGAWA