Patents by Inventor Yukihide YOKOYAMA

Yukihide YOKOYAMA 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: 11306874
    Abstract: A gas supply system includes: a gas tank; an unbalanced pressure reducing valve that reduces a pressure of the gas supplied from the gas tank; a pressure sensor that detects an outlet-side pressure of the pressure reducing valve; a flow rate changing unit that changes an outlet-side flow rate of the pressure reducing valve; and a control unit. The control unit changes the outlet-side flow rate between first and second flow rates, obtains a first pressure, which is a detection value of the pressure sensor when the outlet-side flow rate is the first flow rate, and a second pressure, which is a detection value of the pressure sensor when the outlet-side flow rate is the second flow rate, and estimates an inlet-side pressure of the pressure reducing valve using the relationship among the first flow rate, the second flow rate, and the difference between the first and second pressures.
    Type: Grant
    Filed: August 3, 2020
    Date of Patent: April 19, 2022
    Inventors: Kosuke Kobayashi, Yukihide Yokoyama
  • Publication number: 20210402873
    Abstract: A transport vehicle configured to run on electricity generated by a fuel cell includes: a body having a cargo space for freight; a chassis frame located below the body and supporting the body; and a tank unit including a plurality of tanks that stores fuel gas to be used for power generation by the fuel cell and a connecting portion connecting the tanks, the tank unit being located between the cargo space and the chassis frame.
    Type: Application
    Filed: April 12, 2021
    Publication date: December 30, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, HINO MOTORS, LTD.
    Inventors: Tomoki NAKASHIMA, Toshiyuki KONDO, Yukihide YOKOYAMA
  • Publication number: 20210221223
    Abstract: A vehicle includes a plurality of fuel tanks in which fuel is stored, and a fuel consuming unit that is connected to the fuel tanks and that consumes the fuel supplied from the fuel tanks to obtain a driving force of the vehicle. The fuel tanks are arranged such that a longitudinal direction of the fuel tanks extends along a height direction of the vehicle.
    Type: Application
    Filed: October 6, 2020
    Publication date: July 22, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, HINO MOTORS, LTD.
    Inventors: Yutaka SAWADA, Yukihide YOKOYAMA
  • Publication number: 20210159525
    Abstract: A fuel cell system includes at least one pressure reducing valve connected to a downstream side of a hydrogen gas tank, a hydrogen gas flow path including a first flow path connected to a downstream side of the pressure reducing valve and a plurality of second flow paths connected to a downstream side of the first flow path and branched from the first flow path, a plurality of injector units, each of which is connected to each of the second flow paths, a plurality of fuel cell stacks, each of which is connected to each of the injector units, and a control unit controlling opening and closing of the injector units. The control unit sets valve closing periods of the injector units to periods deviating from each other such that at least one of the injector units is always opened when the fuel cell system satisfies a predetermined operating condition.
    Type: Application
    Filed: November 24, 2020
    Publication date: May 27, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, HINO MOTORS, LTD.
    Inventors: Yutaka SAWADA, Yukihide YOKOYAMA
  • Publication number: 20210129688
    Abstract: A freight vehicle includes a chassis, a body portion having therein a vehicle cabin in which an occupant rides and supported by a front end of the chassis, a tilt mechanism that is provided on the chassis and that tilts the body portion with respect to the chassis, a tank that is disposed on the body portion and stores gas, a gas consuming unit that is supported by the chassis and supplied with the gas to consume the gas, and a pipe that connects the tank and the gas consuming unit and through which the gas flows. At least a part of the pipe is composed of a flexible pipe having a first end fixed to the body portion and a second end fixed to the chassis.
    Type: Application
    Filed: October 15, 2020
    Publication date: May 6, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, HINO MOTORS, LTD.
    Inventors: Yutaka SAWADA, Yukihide YOKOYAMA
  • Publication number: 20210135255
    Abstract: A freight vehicle has a loading space, on which freight is loaded, rearward of a vehicle cabin in which an occupant rides. The freight vehicle includes a fuel cell mounted below the vehicle cabin and functioning as an electric power source, a storage portion disposed between the vehicle cabin and the loading space, and a tank disposed in the storage portion and stores fuel gas that is supplied to the fuel cell, and a radiator installed in the storage portion and performs heat exchange between air and a coolant that is supplied to the fuel cell.
    Type: Application
    Filed: November 3, 2020
    Publication date: May 6, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, HINO MOTORS, LTD.
    Inventors: Yutaka SAWADA, Yukihide YOKOYAMA, Yuichi YAGAMI
  • Publication number: 20210101473
    Abstract: A combination vehicle includes a tractor and a trailer towed by the tractor. The trailer includes a first tank that is configured to store a high-pressure gas as a fuel used by the tractor to travel. The tractor includes a second tank that is configured to store a high-pressure gas as a fuel used by the tractor to travel. The combination vehicle is configured to travel using the fuel supplied from the first tank and the second tank.
    Type: Application
    Filed: August 18, 2020
    Publication date: April 8, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, c/o HINO MOTORS, LTD.
    Inventors: Toshiyuki KONDO, Yukihide YOKOYAMA
  • Publication number: 20210102667
    Abstract: A gas supply system includes: a gas tank; an unbalanced pressure reducing valve that reduces a pressure of the gas supplied from the gas tank; a pressure sensor that detects an outlet-side pressure of the pressure reducing valve; a flow rate changing unit that changes an outlet-side flow rate of the pressure reducing valve; and a control unit. The control unit changes the outlet-side flow rate between first and second flow rates, obtains a first pressure, which is a detection value of the pressure sensor when the outlet-side flow rate is the first flow rate, and a second pressure, which is a detection value of the pressure sensor when the outlet-side flow rate is the second flow rate, and estimates an inlet-side pressure of the pressure reducing valve using the relationship among the first flow rate, the second flow rate, and the difference between the first and second pressures.
    Type: Application
    Filed: August 3, 2020
    Publication date: April 8, 2021
    Inventors: Kosuke KOBAYASHI, Yukihide YOKOYAMA
  • Patent number: 10957927
    Abstract: A fuel cell system includes a supply channel having first channels respectively connected with tanks, and a second channel merged with each of the first channels; first on-off valves of the first channels; a second on-off valve of the second channel; and a controller configured to control opening and closing of the first on-off valves and the second on-off valve. In a state where the second on-off valve is closed, the controller supplies first electric power used for opening the first on-off valve against a first differential pressure to at least one first on-off valve, and supplies second electric power, smaller than the first electric power and used for opening the first on-off valves against a second differential pressure smaller than the first differential pressure, to the first on-off valves other than the at least one first on-off valve.
    Type: Grant
    Filed: May 5, 2020
    Date of Patent: March 23, 2021
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Chihiro Uchimura, Yukihide Yokoyama, Takayoshi Hamano
  • Publication number: 20200280080
    Abstract: The fuel cell system according to the present disclosure includes: a pressure reducing valve provided in a fuel supply pipe constituting a flow path for a fuel gas between main stop valves and injectors; a high-pressure communication pipe provided so as to communicate a first flow path with a second flow path, the first and the second flow paths being the fuel supply pipes serving as flow paths for the fuel gases sent from fuel gas tank units among the fuel supply pipes upstream of the pressure reducing valve, respectively; and a low-pressure communication pipe provided so as to communicate a third flow path with a fourth flow path, the third and the fourth flow paths being the fuel supply pipes serving as flow paths for the fuel gases supplied to fuel cell stacks among the fuel supply pipes downstream of the pressure reducing valve, respectively.
    Type: Application
    Filed: January 8, 2020
    Publication date: September 3, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yukihide YOKOYAMA, Yutaka SAWADA
  • Publication number: 20200266467
    Abstract: A fuel cell system includes a supply channel having first channels respectively connected with tanks, and a second channel merged with each of the first channels; first on-off valves of the first channels; a second on-off valve of the second channel; and a controller configured to control opening and closing of the first on-off valves and the second on-off valve. In a state where the second on-off valve is closed, the controller supplies first electric power used for opening the first on-off valve against a first differential pressure to at least one first on-off valve, and supplies second electric power, smaller than the first electric power and used for opening the first on-off valves against a second differential pressure smaller than the first differential pressure, to the first on-off valves other than the at least one first on-off valve.
    Type: Application
    Filed: May 5, 2020
    Publication date: August 20, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Chihiro UCHIMURA, Yukihide YOKOYAMA, Takayoshi HAMANO
  • Patent number: 10680262
    Abstract: A fuel cell system includes a supply channel having first channels respectively connected with tanks, and a second channel merged with each of the first channels; first on-off valves of the first channels; a second on-off valve of the second channel; and a controller configured to control opening and closing of the first on-off valves and the second on-off valve. In a state where the second on-off valve is closed, the controller supplies first electric power used for opening the first on-off valve against a first differential pressure to at least one first on-off valve, and supplies second electric power, smaller than the first electric power and used for opening the first on-off valves against a second differential pressure smaller than the first differential pressure, to the first on-off valves other than the at least one first on-off valve.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: June 9, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Chihiro Uchimura, Yukihide Yokoyama, Takayoshi Hamano
  • Publication number: 20190157694
    Abstract: A fuel cell system includes a supply channel having first channels respectively connected with tanks, and a second channel merged with each of the first channels; first on-off valves of the first channels; a second on-off valve of the second channel; and a controller configured to control opening and closing of the first on-off valves and the second on-off valve. In a state where the second on-off valve is closed, the controller supplies first electric power used for opening the first on-off valve against a first differential pressure to at least one first on-off valve, and supplies second electric power, smaller than the first electric power and used for opening the first on-off valves against a second differential pressure smaller than the first differential pressure, to the first on-off valves other than the at least one first on-off valve.
    Type: Application
    Filed: October 4, 2018
    Publication date: May 23, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Chihiro UCHIMURA, Yukihide YOKOYAMA, Takayoshi HAMANO