Patents by Inventor Tetsuya Bono

Tetsuya Bono 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: 10797331
    Abstract: A fuel cell system determines whether or not the injector is failed using a determination result, the determination result showing whether or not a fluctuation range determined for power consumed by a hydrogen pump is a predetermined value or less, the fluctuation range being generated by opening and closing of the injector.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: October 6, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kaori Oya, Masahiro Okuyoshi, Tetsuya Bono
  • Publication number: 20200295392
    Abstract: A fuel cell system configured to supply electric power to load includes: a fuel cell; and a control unit configured to set target electric power to be generated by the fuel cell and control electric power generation by the fuel cell such that the fuel cell generates the target electric power. The control unit is configured to, when setting the target electric power using request electric power that the load requests the fuel cell to generate, execute a fluctuation suppression process for making a fluctuation of the target electric power smaller than a fluctuation of the request electric power.
    Type: Application
    Filed: February 27, 2020
    Publication date: September 17, 2020
    Inventors: Tetsuya BONO, Kenji UMAYAHARA
  • Patent number: 10727512
    Abstract: A device for monitoring electricity generation comprising: an acquirer that acquires a total value of cell voltage from multiple cells including fuel cells; an increaser that increases the anode gas now rate to the multiple cells when the total value shows a possibility of negative voltage occurring in some of the multiple cells; and a judger that judges if negative voltage occurred in some of the multiple cells based on the total value following the increase of the anode gas flow rate.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: July 28, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Satoshi Shiokawa, Tetsuya Bono, Osamu Hamanoi
  • Publication number: 20190288313
    Abstract: Provided is a fuel cell system including: a fuel cell; an anode gas supply device; a pressure sensor; a discharge valve; an estimation unit that estimates an anode gas concentration; and a control unit.
    Type: Application
    Filed: February 27, 2019
    Publication date: September 19, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tetsuya BONO, Toshihiro EGAWA, Masahiro OKUYOSHI
  • Publication number: 20190267642
    Abstract: A plant control system is equipped with a plant, an actuator that controls a state of the plant based on a command value, and an arithmetic device that calculates the command value through the use of state information indicating the state of the plant and that outputs the command value to the actuator. The arithmetic device adopts, as the command value, a value of u obtained by deleting a time differential of y from equations: dy/dt=f(y, u, d, t) and K4×dy/dt=K3×yref?K1×y+K2×(time integral of (yref?y))+K5.
    Type: Application
    Filed: February 26, 2019
    Publication date: August 29, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masahiro OKUYOSHI, Tetsuya BONO, Toshihiro EGAWA
  • Publication number: 20190267650
    Abstract: A control device includes a target value acquisition portion configured to acquire a target value of amount of control per predetermined computation cycle, a control portion configured to control the control target using the acquired target value, a target smoothing value calculation portion configured to calculate a target smoothing value in which a temporal change in the target value is slowed down, and a state determination portion configured to calculate a first difference that is a difference between the target value and the target smoothing value to determine that the amount of control is in a transient state when the calculated first difference is equal to or more than a predetermined first threshold value and to determine that the amount of control is in a non-transient state when the first difference is smaller than the first threshold value.
    Type: Application
    Filed: February 5, 2019
    Publication date: August 29, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Toshihiro EGAWA, Tetsuya BONO, Masahiro OKUYOSHI
  • Publication number: 20190260049
    Abstract: The power controller starts imposing the current limit when a condition for the current limit is met the condition, the condition being that the fuel cell does not generate to fulfill the requested amount of power generation while the fuel cell generates power at an upper limit of the supply capability of the fuel gas supply unit, and the power controller removes the current limit at a first predetermined increase rate determined when the requested amount of power generation exceeds a predetermined threshold below a rated power generation amount of the fuel cell and at a second increase rate higher than the first increase rate when the requested amount of power generation is the threshold or less, after the condition for the limit is dissolved.
    Type: Application
    Filed: February 14, 2019
    Publication date: August 22, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tetsuya BONO, Toshihiro EGAWA, Masahiro OKUYOSHI
  • Patent number: 10276883
    Abstract: A fuel cell system, comprising: a measurer that measures an impedance of the fuel cell; a controller that controls an operation state of the fuel cell; and an acquirer that acquires a dryness degree of the fuel cell from the measured impedance when the operation state is a first operation state, and acquires the dryness degree of the fuel cell as a wet state when the operation state is a second operation state in which a water balance is more than the first operation state.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: April 30, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Satoshi Shiokawa, Tetsuya Bono, Osamu Hamanoi
  • Patent number: 10272799
    Abstract: A flow control valve 26 can adjust the percentage of the flow rate of cooling water to a radiator 23 to a predetermined value (50%) or smaller. When the temperature of the cooling water in a fuel cell 11 is determined to be a predetermined temperature (0° C.) or higher after the cooling water is supplied to the fuel cell 11 with the percentage of the flow rate of the cooling water to the radiator 23 set to the predetermined value (50%) or larger, a controller 41 performs a predetermined percentage supply operation for controlling the flow control valve 26 and a pump 22 to supply the cooling water to the fuel cell 11 with the percentage of the flow rate of the cooling water to the radiator 23 set to the predetermined value (50%) or larger.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: April 30, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tetsuya Bono, Takashi Yamada
  • Patent number: 10181613
    Abstract: A fuel cell system comprising: an acquirer that acquires a total value of cell voltages of two or more cells included in a fuel cell; and a determiner that determines, when the total value is a first voltage value, abnormal power generation in which power generation by at least a part of the two or more cells is abnormal, that determines, when the total value is a second voltage value higher than the first voltage value, normal power generation in which power generation by the two or more cells is normal and that determines, when the total value is a third voltage value higher than the first voltage value but lower than the second voltage value, the normal power generation if a cathode gas is deficient or the abnormal power generation if the cathode gas is not deficient.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: January 15, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tetsuya Bono, Satoshi Shiokawa, Osamu Hamanoi
  • Patent number: 10122030
    Abstract: A fuel cell system includes a fuel cell including an electrolyte membrane, a sensor configured to measure a temperature of the fuel cell, and a controller. The controller is configured to cause the fuel cell to perform a wet operation to increase a water balance at a cathode of the fuel cell to a value higher than a water balance at the cathode during a normal operation of the fuel cell, when the temperature of the fuel cell measured by the sensor is maintained at a first threshold temperature or higher for a prescribed period of time or longer and then the temperature of the fuel cell decreases to below a second threshold temperature that is equal to or lower than the first threshold temperature.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: November 6, 2018
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Satoshi Shiokawa, Tetsuya Bono, Osamu Hamanoi
  • Publication number: 20180261859
    Abstract: A fuel cell system determines whether or not the injector is failed using a determination result, the determination result showing whether or not a fluctuation range determined for power consumed by a hydrogen pump is a predetermined value or less, the fluctuation range being generated by opening and closing of the injector.
    Type: Application
    Filed: March 7, 2018
    Publication date: September 13, 2018
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kaori Oya, Masahiro Okuyoshi, Tetsuya Bono
  • Patent number: 9997796
    Abstract: The present invention provides a system for a fuel cell vehicle, capable of preventing an unnecessary error in calculating high potential avoidance power to calculate power for high potential avoidance with high accuracy.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: June 12, 2018
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tetsuya Bono, Hiroyuki Imanishi
  • Patent number: 9991535
    Abstract: The fuel cell system includes: a fuel cell 40 that receives supply of reactant gas to generate power; output characteristic updating means for updating an output characteristic of the fuel cell 40 based on output current and output voltage measured by a current sensor 140 and a voltage sensor 150; maximum power calculation means for calculating, using the output characteristic, the maximum power available at the fuel cell 40; and determination means for determining whether a value of the output characteristic is in an assumed situation where the output characteristic value is assumed to be temporarily lowered, wherein while the output characteristic value is determined by the determination means to be in the assumed situation, the maximum power calculation means calculates the maximum power using the output characteristic updated by the output characteristic updating means just before transition to the assumed situation.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: June 5, 2018
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tetsuya Bono, Satoshi Shiokawa, Osamu Hamanoi
  • Publication number: 20160190613
    Abstract: A fuel cell system includes a fuel cell including an electrolyte membrane, a sensor configured to measure a temperature of the fuel cell, and a controller. The controller is configured to cause the fuel cell to perform a wet operation to increase a water balance at a cathode of the fuel cell to a value higher than a water balance at the cathode during a normal operation of the fuel cell, when the temperature of the fuel cell measured by the sensor is maintained at a first threshold temperature or higher for a prescribed period of time or longer and then the temperature of the fuel cell decreases to below a second threshold temperature that is equal to or lower than the first threshold temperature.
    Type: Application
    Filed: December 21, 2015
    Publication date: June 30, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi SHIOKAWA, Tetsuya BONO, Osamu HAMANOI
  • Publication number: 20160141674
    Abstract: An amount of power generation is increased in the case where a difference in water content between some and others of the cells is greater than a predetermined value. In the case of satisfaction of a first condition that the difference in water content between some and others of the cells is greater than the predetermined value, a fuel battery may be caused to perform an operation in which the amount of power generation exceeds that in the normal operation to reduce a cell voltage difference ?V between an average cell voltage Va and a minimum cell voltage Vb. The first condition is, for example, that the cell voltage difference ?V, which is a difference between the average cell voltage Va and the minimum cell voltage Vb, is greater than a first threshold value.
    Type: Application
    Filed: October 27, 2015
    Publication date: May 19, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi Shiokawa, Tetsuya Bono, Osamu Hamanoi
  • Publication number: 20160141688
    Abstract: A fuel cell system, comprising: a measurer that measures an impedance of the fuel cell; a controller that controls an operation state of the fuel cell; and an acquirer that acquires a dryness degree of the fuel cell from the measured impedance when the operation state is a first operation state, and acquires the dryness degree of the fuel cell as a wet state when the operation state is a second operation state in which a water balance is more than the first operation state.
    Type: Application
    Filed: October 22, 2015
    Publication date: May 19, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Satoshi SHIOKAWA, Tetsuya Bono, Osamu Hamanoi
  • Publication number: 20160129808
    Abstract: A flow control valve 26 can adjust the percentage of the flow rate of cooling water to a radiator 23 to a predetermined value (50%) or smaller. When the temperature of the cooling water in a fuel cell 11 is determined to be a predetermined temperature (0° C.) or higher after the cooling water is supplied to the fuel cell 11 with the percentage of the flow rate of the cooling water to the radiator 23 set to the predetermined value (50%) or larger, a controller 41 performs a predetermined percentage supply operation for controlling the flow control valve 26 and a pump 22 to supply the cooling water to the fuel cell 11 with the percentage of the flow rate of the cooling water to the radiator 23 set to the predetermined value (50%) or larger.
    Type: Application
    Filed: November 3, 2015
    Publication date: May 12, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tetsuya BONO, Takashi YAMADA
  • Publication number: 20160133973
    Abstract: The present invention provides a system for a fuel cell vehicle, capable of preventing an unnecessary error in calculating high potential avoidance power to calculate power for high potential avoidance with high accuracy.
    Type: Application
    Filed: November 3, 2015
    Publication date: May 12, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tetsuya BONO, Hiroyuki IMANlSHI
  • Publication number: 20160133969
    Abstract: A fuel cell system comprising: an acquirer that acquires a total value of cell voltages of two or more cells included in a fuel cell; and a determiner that determines, when the total value is a first voltage value, abnormal power generation in which power generation by at least a part of the two or more cells is abnormal, that determines, when the total value is a second voltage value higher than the first voltage value, normal power generation in which power generation by the two or more cells is normal and that determines, when the total value is a third voltage value higher than the first voltage value but lower than the second voltage value, the normal power generation if a cathode gas is deficient or the abnormal power generation if the cathode gas is not deficient.
    Type: Application
    Filed: November 10, 2015
    Publication date: May 12, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tetsuya BONO, Satoshi SHIOKAWA, Osamu HAMANOI