Patents by Inventor Tsukuo Ishitoya

Tsukuo Ishitoya 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: 20190190049
    Abstract: A moving body having a fuel cell includes: an off-gas passage; a vehicle body having a cabin; an opening and closing body including at least one of a door and a window; an opening and closing situation recognition portion configured to recognize an opening and closing situation of the opening and closing body; a stopped state detection portion configured to detect that the moving body moves at a predetermined speed or lower; and a controller configured to, in a case where the moving body moves at the predetermined speed or lower and there is a demand for electric power generation by the fuel cell, when the opening and closing situation recognition portion recognizes a situation in which the opening and closing body is in an open state, execute an intrusion suppression process to make it difficult for a mist discharged from the off-gas passage to enter the cabin.
    Type: Application
    Filed: December 4, 2018
    Publication date: June 20, 2019
    Inventor: Tsukuo ISHITOYA
  • Patent number: 10107454
    Abstract: In a gas supply system, a control portion acquires a first temperature and a first pressure of a gas in a fuel tank, and a first output signal value of a pressure sensor corresponding to the first pressure before gas supply, acquires a first amount of the gas in the fuel tank using a fuel tank volume, the first temperature, and the first pressure, acquires a second amount after gas supply, through integration of a measurement value obtained by a flowmeter during gas supply, acquires a second temperature, a second pressure, and a second output signal value corresponding to the second pressure after gas supply, calculates a third pressure using the fuel tank volume, the second amount, and the second temperature, and corrects a relationship between an output signal and the pressure using the first pressure, the first output signal value, the third pressure, and the second output signal value.
    Type: Grant
    Filed: August 10, 2011
    Date of Patent: October 23, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroki Yahashi, Tsukuo Ishitoya
  • Patent number: 9604535
    Abstract: A vehicle (3) equipped with gas tanks (30a, 30b) has a common channel (34c) and branch channels (34a, 34b) that branch from the common channel (34c) to the gas tanks (30a, 30b), as a filling passageway (34) through which gas is supplied from an external gas station (2) to the gas tanks (30a, 30b). The gas tank (30a) is better in heat dissipation characteristic than the gas tank (30b). Only the branch channel (34a) that corresponds to the gas tank (30a) is provided with a shutoff valve (40) or a flow regulation valve (46) that is capable of restricting the amount of gas supplied to the gas tank (30a).
    Type: Grant
    Filed: February 3, 2011
    Date of Patent: March 28, 2017
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroki Yahashi, Tsukuo Ishitoya
  • Patent number: 9400506
    Abstract: A pressure reducer includes a piston slidably accommodated in a cylinder to define a decompression chamber and a pressure adjusting chamber. A seal member includes an elastic member and a sliding portion. The sliding portion is pressed by the elastic member such that the sliding portion slides on an inner circumferential surface of the cylinder. An annular member is located on an outer circumferential surface of the piston and between the seal member and the pressure adjusting surface. The annular member is pressed against the inner circumferential surface of the cylinder with a force that is less than a force with which the sliding portion is pressed against the inner circumferential surface of the cylinder. Thus, the pressure reducer prevents the piston from being moved by an excessive amount with highly accurately adjusting pressure.
    Type: Grant
    Filed: December 26, 2005
    Date of Patent: July 26, 2016
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Toshihiko Shima, Hidetoshi Fujiwara, Munetoshi Kuroyanagi, Takuya Suzuki, Tsukuo Ishitoya, Akira Yamashita
  • Patent number: 9217539
    Abstract: There is disclosed a high-pressure tank capable of appropriately discharging high-pressure gas. The high-pressure tank is mounted on a mobile body, stores the high-pressure gas, and includes a plurality of gas discharge means for discharging the high-pressure gas from the high-pressure tank. The gas discharge means are disposed at opposite sides of the high-pressure tank in a longitudinal direction. The gas discharge means can each have a path through which the inside of the high-pressure tank communicates with the outside thereof, and a manual valve including a manual operating section for opening and closing the path by a manual operation.
    Type: Grant
    Filed: June 1, 2006
    Date of Patent: December 22, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tsukuo Ishitoya, Nobuo Kobayashi
  • Patent number: 9109750
    Abstract: A gap amount (62) between a liner (53) and a reinforcement layer (55) before filling gas into a tank (30) is calculated on the basis of a tank pressure and a tank temperature in the tank (30). It is predicted whether a load larger than or equal to an allowable amount acts on the liner (53) by the gas filling on the basis of the calculated gap amount (62). When it is predicted that the load larger than or equal to the allowable amount acts on the liner (53), a filling flow rate at which the gas is filled into the tank (30) is limited in comparison with a case where it is predicted that the load larger than or equal to the allowable amount does not act on the liner (53).
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: August 18, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Eiji Okawachi, Tsukuo Ishitoya
  • Patent number: 8985141
    Abstract: In order to achieve seal durability and bring about a damping action for a piston-type pressure regulating valve, a pressure regulating valve of the present invention is characterized by a valve moving member moving in such a manner as to cause communication or block communication between a primary chamber and a secondary chamber within a case, wherein a plurality of central members are arranged between the case and the valve moving member and the plurality of central members are taken to be different materials. It is then possible to bring about both a damping action and seal durability using the central members by providing central members of different materials.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: March 24, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tsukuo Ishitoya, Nobuo Kobayashi, Nobuyuki Ogami, Akira Yamashita
  • Patent number: 8931754
    Abstract: A safety valve includes a cylinder having an open end and a plug for closing the open end with a hermetic seal. The interior of the cylinder communicates with a high-pressure gas passage. The cylinder is deformed as a function of gas pressure in the high-pressure gas passage to widen the open end. This allows gas in the high-pressure gas passage to escape and thus prevents the gas pressure from increasing beyond an acceptable level.
    Type: Grant
    Filed: October 3, 2011
    Date of Patent: January 13, 2015
    Assignees: Jtekt Corporation, Toyooki Kogyo Co., Ltd.
    Inventors: Yoshinori Imoto, Hiroaki Suzuki, Kazushi Numazaki, Chihiro Uchimura, Akira Yamashita, Tsukuo Ishitoya, Noritaka Watanabe
  • Patent number: 8770012
    Abstract: A fuel leakage detection system comprises: a communication part for acquiring data relating to fuel filling of an onboard fuel tank from the vehicle side when a fuel supply part is connected to a filler port; a fuel flow rate measurement part, provided on the upstream of the fuel supply part 18, for measuring the flow rate of fuel flowing to the fuel supply part; a fuel flow-out permission part for permitting/stopping the outflow of fuel to the fuel supply part; and a control unit for controlling the fuel flow-out permission part. The control unit further comprises a fuel leakage detection part for detecting fuel leakage when filling fuel to a vehicle based on the fuel flow rate acquired by the fuel flow rate measurement part and on data relating to fuel filling acquired from the vehicle side via the communication part, and the fuel flow out permission part stops outflow of fuel to the fuel supply part when occurrence of fuel leakage is detected by the fuel detection part.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: July 8, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroki Yahashi, Eiji Okawachi, Tsukuo Ishitoya
  • Patent number: 8770221
    Abstract: In order to achieve seal durability and bring about a damping action for a piston-type pressure regulating valve, a pressure regulating valve of the present invention is characterized by a valve moving member moving in such a manner as to cause communication or block communication between a primary chamber and a secondary chamber within a case, wherein a plurality of central members are arranged between the case and the valve moving member and the plurality of central members are taken to be different materials. It is then possible to bring about both a damping action and seal durability using the central members by providing central members of different materials.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: July 8, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tsukuo Ishitoya, Nobuo Kobayashi, Nobuyuki Ogami, Akira Yamashita
  • Patent number: 8678023
    Abstract: A damage detection system includes an electromagnetic valve that is provided at a first end of a pressure vessel and operated by supplied electric power, a harness that is disposed so as to at least partially extend along at least a part of a bottom surface of the pressure vessel and that serves to supply electric power to the electromagnetic valve, and a damage detector for detecting damage of the pressure vessel based on an input of a pressing force from the bottom surface side of the pressure vessel.
    Type: Grant
    Filed: September 3, 2010
    Date of Patent: March 25, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroki Yahashi, Tsukuo Ishitoya
  • Patent number: 8642225
    Abstract: A high-pressure fluid supply apparatus that avoids gas leakage due to a reduction in the performance of a seal member provided inside piping is provided. A high-pressure fluid supply apparatus is provided, the apparatus including: piping that supplies a fluid from a high-pressure fluid supply source to a fluid utilizing device via a first valve device and a second valve device; a seal member that is arranged at a pipe part between the first and second valve devices in order to maintain sealing property of the pipe part, the seal member being made of an elastic material; and a control unit that controls closing and opening of the first and second valve devices to be able to adjust a pressure variation rate of the fluid in the pipe part, wherein the control unit adjusts the pressure variation rate in accordance with a temperature of the seal member.
    Type: Grant
    Filed: January 19, 2009
    Date of Patent: February 4, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Tsukuo Ishitoya
  • Patent number: 8550105
    Abstract: A valve system includes a fusible plug valve that functions as a fusible plug valve and as a manual valve. When functioning as a fusible plug valve, the fusible plug valve opens at a high temperature to release gas from a high pressure tank to outside. When functioning as a manual valve, the fusible plug valve is opened manually to release the gas from the high pressure tank to the outside.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: October 8, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tsukuo Ishitoya, Eiji Okawachi, Kazushi Numazaki, Hisanori Kondo, Koji Koide
  • Publication number: 20130146176
    Abstract: In a gas supply system, a control portion acquires a first temperature and a first pressure of a gas in a fuel tank, and a first output signal value of a pressure sensor corresponding to the first pressure before gas supply, acquires a first amount of the gas in the fuel tank using a fuel tank volume, the first temperature, and the first pressure, acquires a second amount after gas supply, through integration of a measurement value obtained by a flowmeter during gas supply, acquires a second temperature, a second pressure, and a second output signal value corresponding to the second pressure after gas supply, calculates a third pressure using the fuel tank volume, the second amount, and the second temperature, and corrects a relationship between an output signal and the pressure using the first pressure, the first output signal value, the third pressure, and the second output signal value.
    Type: Application
    Filed: August 10, 2011
    Publication date: June 13, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroki Yahashi, Tsukuo Ishitoya
  • Patent number: 8435700
    Abstract: An object of the present invention is to provide a fuel cell system configured to be able to suppress loads imposed on a liner caused by gas filling, as well as a method for supplying fuel gas in the fuel cell system, and a mobile body. The fuel cell system includes a fuel cell, a tank which includes a liner and a reinforcement layer formed on an outer peripheral surface of the liner and in which fuel gas is stored, an adjustment device configured to adjust a supply amount of fuel gas to be fed from the tank to the fuel cell, an information acquisition section configured to acquire information on a pressure and a temperature in the tank, a calculation section configured to calculate a gap amount between the liner and the reinforcement layer based on information acquired by the information acquisition section during operation of the fuel cell system, and a decision section configured to decide whether or not to limit the supply amount based on the calculated gap amount.
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: May 7, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Eiji Okawachi, Tsukuo Ishitoya
  • Publication number: 20130052557
    Abstract: An object of the present invention is to provide a fuel cell system configured to be able to suppress loads imposed on a liner caused by gas filling, as well as a method for supplying fuel gas in the fuel cell system, and a mobile body. The fuel cell system includes a fuel cell, a tank which includes a liner and a reinforcement layer formed on an outer peripheral surface of the liner and in which fuel gas is stored, an adjustment device configured to adjust a supply amount of fuel gas to be fed from the tank to the fuel cell, an information acquisition section configured to acquire information on a pressure and a temperature in the tank, a calculation section configured to calculate a gap amount between the liner and the reinforcement layer based on information acquired by the information acquisition section during operation of the fuel cell system, and a decision section configured to decide whether or not to limit the supply amount based on the calculated gap amount.
    Type: Application
    Filed: May 12, 2010
    Publication date: February 28, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Eiji Okawachi, Tsukuo Ishitoya
  • Publication number: 20130037165
    Abstract: A gap amount (62) between a liner (53) and a reinforcement layer (55) before filling gas into a tank (30) is calculated on the basis of a tank pressure and a tank temperature in the tank (30). It is predicted whether a load larger than or equal to an allowable amount acts on the liner (53) by the gas filling on the basis of the calculated gap amount (62). When it is predicted that the load larger than or equal to the allowable amount acts on the liner (53), a filling flow rate at which the gas is filled into the tank (30) is limited in comparison with a case where it is predicted that the load larger than or equal to the allowable amount does not act on the liner (53).
    Type: Application
    Filed: April 20, 2011
    Publication date: February 14, 2013
    Inventors: Eiji Okawachi, Tsukuo Ishitoya
  • Publication number: 20130014855
    Abstract: A fuel leakage detection system comprises: a communication part for acquiring data relating to fuel filling of an onboard fuel tank from the vehicle side when a fuel supply part is connected to a filler port; a fuel flow rate measurement part, provided on the upstream of the fuel supply part 18, for measuring the flow rate of fuel flowing to the fuel supply part; a fuel flow-out permission part for permitting/stopping the outflow of fuel to the fuel supply part; and a control unit for controlling the fuel flow-out permission part. The control unit further comprises a fuel leakage detection part for detecting fuel leakage when filling fuel to a vehicle based on the fuel flow rate acquired by the fuel flow rate measurement part and on data relating to fuel filling acquired from the vehicle side via the communication part, and the fuel flow out permission part stops outflow of fuel to the fuel supply part when occurrence of fuel leakage is detected by the fuel detection part.
    Type: Application
    Filed: April 30, 2010
    Publication date: January 17, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroki Yahashi, Eiji Okawachi, Tsukuo Ishitoya
  • Publication number: 20130008730
    Abstract: A fuel-cell-powered vehicle (10) includes a cover (28) that covers and protects a tank (18) mounted on a lower portion of the vehicle body. An introduction port (32) is formed in the cover (28) in front of the tank (18) of the vehicle to introduce air into the space within the cover (28). In addition, a discharge port (34) is formed in the cover (28) behind the tank (18) of the vehicle to discharge the air introduced into the space within the cover (28) from the introduction port (32).
    Type: Application
    Filed: March 1, 2011
    Publication date: January 10, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroki Yahashi, Tsukuo Ishitoya
  • Publication number: 20130008530
    Abstract: In order to achieve seal durability and bring about a damping action for a piston-type pressure regulating valve, a pressure regulating valve of the present invention is characterized by a valve moving member moving in such a manner as to cause communication or block communication between a primary chamber and a secondary chamber within a case, wherein a plurality of central members are arranged between the case and the valve moving member and the plurality of central members are taken to be different materials. It is then possible to bring about both a damping action and seal durability using the central members by providing central members of different materials.
    Type: Application
    Filed: September 14, 2012
    Publication date: January 10, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tsukuo ISHITOYA, Nobuo KOBAYASHI, Nobuyuki OGAMI, Akira YAMASHITA