Patents by Inventor Ryoji Sakai

Ryoji Sakai 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: 11424464
    Abstract: A fuel cell system includes fuel cell, electrical storage device that stores electric power generated by the fuel cell, and control device of the fuel cell, the control device performs first control which causes the fuel cell to generate power and increases charging rate of the electrical storage device and second control which restricts output of the fuel cell to be smaller than that in the first control and decreases charging rate of the electrical storage device, and when switching condition, in which electric power demand from the external devices becomes greater than predetermined electric power or state in which electric power demand from the external devices is greater than the predetermined electric power continues for predetermined time, is satisfied, the control device increases power output by the fuel cell during the first control being performed to be larger than that before the switching condition was satisfied.
    Type: Grant
    Filed: September 18, 2020
    Date of Patent: August 23, 2022
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Ryoji Sakai, Akihiro Matsui
  • Publication number: 20220238899
    Abstract: An ECU of a fuel cell system supplies cathode gas by rotating an air pump at a low-load rotational speed and performs a low-load power generation in a fuel cell stack, while a moving body is traveling. When the fuel cell stack generates power while the moving body is stopped, the ECU increases the supply amount of the cathode gas by rotating the air pump at a during-stoppage-of-traveling rotational speed which is greater than the low-load rotational speed.
    Type: Application
    Filed: January 24, 2022
    Publication date: July 28, 2022
    Inventors: Ryoji SAKAI, Kazuhide INOUE
  • 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
  • Patent number: 11380921
    Abstract: A system includes an electrical storage device that stores an electric power generated by a fuel cell, an electric load to which the electric power is supplied using the electric power of the fuel cell and/or the electrical storage device, and an electric power control part that controls supply of the electric power to the electric load, and the electric power control part performs warming-up control of the fuel cell when an electric power requested to be generated at the fuel cell is less than a predetermined value, and causes the fuel cell to generate an electric power that is greater than the electric power requested to be generated at the fuel cell and causes to store excess electric power in the electrical storage device when the electric power requested to be generated at the fuel cell is equal to or greater than the predetermined value.
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: July 5, 2022
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Ryoji Sakai, Akihiro Matsui
  • 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
  • Publication number: 20210300187
    Abstract: A control device is a control device of a moving body that includes a first accumulation unit configured to accumulate first energy, a second accumulation unit configured to accumulate second energy different from the first energy, and an electric motor configured to generate power to move using any one or both of second energy obtained by converting first energy accumulated in the first accumulation unit and second energy accumulated in the second accumulation unit, in which a required amount, which is an amount of the second energy required to move from a current place to a supply point that is a point where supply of the first energy is received, is acquired when the second energy is accumulated in the second accumulation unit and, if the required amount has been supplied to the second accumulation unit, a termination-related operation related to termination of the supply is executed.
    Type: Application
    Filed: March 24, 2021
    Publication date: September 30, 2021
    Inventor: Ryoji Sakai
  • Publication number: 20210300181
    Abstract: A control device includes a first accumulation unit configured to accumulate first energy, a second accumulation unit configured to accumulate second energy different from the first energy, and a supply unit configured to supply either or both of second energy obtained by converting first energy accumulated by the first accumulation unit and second energy accumulated by the second accumulation unit to an external device. The amount of second energy that is supplied from the supply unit to the external device is calculated on the basis of the amount of second energy supplied to a drive unit via the supply unit to move the moving body to a destination, the amount of first energy accumulated by the first accumulation unit, and the amount of second energy accumulated by the second accumulation unit, and a display device is caused to display a supply available time according to the calculated amount of second energy.
    Type: Application
    Filed: March 24, 2021
    Publication date: September 30, 2021
    Inventor: Ryoji Sakai
  • Patent number: 11097636
    Abstract: A fuel cell vehicle includes a fuel cell, an oxygen-containing gas supply apparatus, and an ECU. A pump of the oxygen-containing gas supply apparatus is a shaft floating type air pump having a rotatable element. The rotatable element floats from a wall around the rotatable element, as a result of rotation of the rotatable element. The ECU includes a travel permission determination instruction unit. The travel permission determination instruction unit determines whether or not a predetermined condition indicative of a floating state of the rotatable element is satisfied, and if the predetermined condition is satisfied, permits traveling of the fuel cell vehicle, and if the predetermined condition is not satisfied, restricts traveling of the fuel cell vehicle.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: August 24, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Ryoji Sakai, Akihiro Matsui, Naoki Imai, Tatsuya Sugawara
  • Publication number: 20210129824
    Abstract: A vehicle system which includes: an electric power control unit causes a power generation device to continue to generate electric power when the derived remaining amount of a fuel is smaller than a first threshold value or when a traveling distance calculated on the basis of the remaining amount of a fuel is smaller than a second threshold value and the output control unit calculates a second traveling distance that a vehicle is able to travel on the basis of the derived amount of charge or charge rate and causes an output unit to output information associated with the second traveling distance.
    Type: Application
    Filed: October 14, 2020
    Publication date: May 6, 2021
    Inventors: Ryoji Sakai, Asao Uenodai
  • Publication number: 20210104757
    Abstract: A system includes an electrical storage device that stores an electric power generated by a fuel cell, an electric load to which the electric power is supplied using the electric power of the fuel cell and/or the electrical storage device, and an electric power control part that controls supply of the electric power to the electric load, and the electric power control part performs warming-up control of the fuel cell when an electric power requested to be generated at the fuel cell is less than a predetermined value, and causes the fuel cell to generate an electric power that is greater than the electric power requested to be generated at the fuel cell and causes to store excess electric power in the electrical storage device when the electric power requested to be generated at the fuel cell is equal to or greater than the predetermined value.
    Type: Application
    Filed: September 25, 2020
    Publication date: April 8, 2021
    Inventors: Ryoji Sakai, Akihiro Matsui
  • Publication number: 20210098802
    Abstract: A fuel cell system includes fuel cell, an electrical storage device that stores electric power generated by the fuel cell, and a control device that controls generation of power by the fuel cell, that acquires a charging rate of the electrical storage device, when the electric power in the electrical storage device is supplied to external devices, the control device performs first control which increases a charging rate of the electrical storage device and second control which restricts a power generation amount of the fuel cell to be smaller than in the first control and decreases a charging rate of the electrical storage device, and when a temperature detected by the temperature sensor is lower than a predetermined temperature, a power generation amount per hour of the fuel cell in the first control is reduced in comparison when the detected temperature is equal to or greater than the predetermined temperature.
    Type: Application
    Filed: September 17, 2020
    Publication date: April 1, 2021
    Inventors: Ryoji Sakai, Akihiro Matsui
  • Publication number: 20210098806
    Abstract: A fuel cell system includes fuel cell, electrical storage device that stores electric power generated by the fuel cell, and control device of the fuel cell, the control device performs first control which causes the fuel cell to generate power and increases charging rate of the electrical storage device and second control which restricts output of the fuel cell to be smaller than that in the first control and decreases charging rate of the electrical storage device, and when switching condition, in which electric power demand from the external devices becomes greater than predetermined electric power or state in which electric power demand from the external devices is greater than the predetermined electric power continues for predetermined time, is satisfied, the control device increases power output by the fuel cell during the first control being performed to be larger than that before the switching condition was satisfied.
    Type: Application
    Filed: September 18, 2020
    Publication date: April 1, 2021
    Inventors: Ryoji Sakai, Akihiro Matsui
  • Publication number: 20200276903
    Abstract: A first power source system includes a first motor control section that controls at least torque of a drive motor. When a temperature of an FC is less than or equal to a prescribed temperature Th and a demand for high output is made to the drive motor, the first motor control section limits the torque of the drive motor to be lower than a maximum torque that can be output by the drive motor, and continuously implements this torque limitation.
    Type: Application
    Filed: February 28, 2020
    Publication date: September 3, 2020
    Inventors: Ryoji SAKAI, Akihiro MATSUI
  • Publication number: 20200127312
    Abstract: A fuel cell system includes a fuel cell, an air pump which supplies air to the fuel cell, a passenger presence or absence determination unit which determines the presence or absence of a passenger in a vehicle in which the fuel cell and the air pump are installed, a discharge flow rate determination unit which determines a discharge flow rate of the air pump when the fuel cell is warmed up, in accordance with the presence or absence of the passenger in the vehicle, and a control unit which controls the air pump on the basis of the discharge flow rate determined by the discharge flow rate determination unit.
    Type: Application
    Filed: October 16, 2019
    Publication date: April 23, 2020
    Inventors: Ryoji Sakai, Akihiro Matsui, Kuniaki Ojima
  • Publication number: 20200122605
    Abstract: A fuel cell system includes an air pump configured to supply air to a fuel cell, and a discharge flow rate determination unit which determines a discharge flow rate of the air pump when warming up the fuel cell, in accordance with a speed of a vehicle in which the fuel cell and the air pump are installed, or a required drive output of the vehicle. The discharge flow rate determination unit increases the discharge flow rate in the case that the speed or the required drive output is greater than or equal to a predetermined threshold value, and decreases the discharge flow rate in the case that the speed or the required drive output is less than the predetermined threshold value.
    Type: Application
    Filed: October 16, 2019
    Publication date: April 23, 2020
    Inventors: Ryoji Sakai, Akihiro Matsui, Kuniaki Ojima
  • Publication number: 20200127309
    Abstract: An FC control unit selectively supplies electrical power of an FC unit to one or both of a battery and a battery heater, based on at least one of whether an SOC of the battery is higher or lower than a preset threshold value, and whether a battery temperature is higher or lower than a preset temperature threshold.
    Type: Application
    Filed: October 17, 2019
    Publication date: April 23, 2020
    Inventors: Ryoji Sakai, Akihiro Matsui, Kuniaki Ojima
  • Publication number: 20190270392
    Abstract: A fuel cell vehicle includes a fuel cell, an oxygen-containing gas supply apparatus, and an ECU. A pump of the oxygen-containing gas supply apparatus is a shaft floating type air pump having a rotatable element. The rotatable element floats from a wall around the rotatable element, as a result of rotation of the rotatable element. The ECU includes a traveling permission determination instruction unit. The traveling permission determination instruction unit determines whether or not a predetermined condition indicative of a floating state of the rotatable element is satisfied, and if the predetermined condition is satisfied, permits traveling of the fuel cell vehicle, and if the predetermined condition is not satisfied, restricts traveling of the fuel cell vehicle.
    Type: Application
    Filed: February 28, 2019
    Publication date: September 5, 2019
    Inventors: Ryoji Sakai, Akihiro Matsui, Naoki Imai, Tatsuya Sugawara
  • Patent number: 9193432
    Abstract: There is provided a stratospheric stay facility that allows humans to stay in the stratosphere in the altitude range of 15 to 25 kilometers. The stratospheric stay facility includes a structure for stay 10 having a cabin in which an environment allowing humans to stay in it is maintained and having resistance to pressure in an environment at a highest altitude at which the structure for stay is kept flying, airships 20 that are adapted to be capable of ascending to the sky by buoyancy and lifts the structure for stay 10 to keep it flying in the stratosphere in the altitude range of 15 to 25 kilometers, and first mooring cables 50 and second mooring cable 80 each of which has a first end fixed to the structure for stay 10 and a second end fixed to the ground to moor the structure for stay 10.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: November 24, 2015
    Assignee: SAKASE ADTECH CO., LTD.
    Inventors: Takahira Aoki, Yasuyuki Miyazaki, Ryoji Sakai, Yoshiko Yoneyama
  • Publication number: 20130264413
    Abstract: There is provided a stratospheric stay facility that allows humans to stay in the stratosphere in the altitude range of 15 to 25 kilometers. The stratospheric stay facility includes a structure for stay 10 having a cabin in which an environment allowing humans to stay in it is maintained and having resistance to pressure in an environment at a highest altitude at which the structure for stay is kept flying, airships 20 that are adapted to be capable of ascending to the sky by buoyancy and lifts the structure for stay 10 to keep it flying in the stratosphere in the altitude range of 15 to 25 kilometers, and first mooring cables 50 and second mooring cable 80 each of which has a first end fixed to the structure for stay 10 and a second end fixed to the ground to moor the structure for stay 10.
    Type: Application
    Filed: September 28, 2010
    Publication date: October 10, 2013
    Applicant: SAKASE ADTECH CO., LTD.
    Inventors: Takahira Aoki, Yasuyuki Miyazaki, Ryoji Sakai, Yoshiko Yoneyama
  • Patent number: 8314776
    Abstract: [Problems] A highly convenient maintenance screen needs to be displayed on a display panel when performing a maintenance while considering a correlation between a plurality of processing chambers. [Means for Solving the Problems] Since task buttons are displayed on a second display region 312 by arranging them from the left in an order of a time sequence in which each task button has been clicked, a highly convenient maintenance screen can be displayed on a touch panel 300 when performing a maintenance.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: November 20, 2012
    Assignee: Tokyo Electron Limited
    Inventors: Hiroyuki Hosokawa, Ryoji Sakai, Masashi Okuyama