Patents by Inventor Yoshirou Shimoyama

Yoshirou Shimoyama 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: 7402355
    Abstract: A cooling method for a fuel cell using a heat exchanger is provided. The method comprises the steps of: providing an ion exchanger in a circulation system for the cooling fluid; decreasing ion concentration in the cooling fluid by circulating the cooling fluid through the fuel cell and the ion exchanger when the temperature of the cooling fluid is below a thermostat operating temperature; distributing a portion of the cooling fluid discharged from the fuel cell, mixing the portion of the cooling fluid returning from the heat exchanger with another portion of the cooling fluid whose ion concentration has been decreased in the previous step, and returning the cooling fluid mixture to the fuel cell, when the temperature of the cooling fluid is approaching the thermostat operating temperature; and cooling the fuel cell by circulating the cooling fluid through the fuel cell and the heat exchanger after the temperature of the cooling fluid reaches the thermostat operating temperature.
    Type: Grant
    Filed: May 10, 2006
    Date of Patent: July 22, 2008
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Mitsuharu Imaseki, Takeshi Ushio, Yoshirou Shimoyama
  • Patent number: 7358003
    Abstract: The cooling structure for a fuel cell vehicle comprises a fuel cell, a drive motor for driving the fuel cell vehicle using the energy generated by the fuel cell, a first cooling flow passage for cooling the fuel cell using a main radiator, and a second cooling flow passage for cooling the drive motor or the power control unit of the drive motor using auxiliary radiators. The main radiator is disposed in the central portion of the front surface of a vehicle body. The auxiliary radiators are respectively disposed on the front surface of the vehicle body in such a manner that their heat exchange surface are situated shifted in the vehicle-width direction so as to prevent them from being overlapped with the heat exchange surface of the main radiator.
    Type: Grant
    Filed: November 20, 2003
    Date of Patent: April 15, 2008
    Assignee: Honda Motor Co., Ltd.
    Inventors: Mitsuharu Imaseki, Yoshirou Shimoyama, Hiroyuki Hattori
  • Patent number: 7294422
    Abstract: A cooling method for a fuel cell using a heat exchanger is provided. The method comprises the steps of: providing an ion exchanger in a circulation system for the cooling fluid; decreasing ion concentration in the cooling fluid by circulating the cooling fluid through the fuel cell and the ion exchanger when the temperature of the cooling fluid is below a thermostat operating temperature; distributing a portion of the cooling fluid discharged from the fuel cell, mixing the portion of the cooling fluid returning from the heat exchanger with another portion of the cooling fluid whose ion concentration has been decreased in the previous step, and returning the cooling fluid mixture to the fuel cell, when the temperature of the cooling fluid is approaching the thermostat operating temperature; and cooling the fuel cell by circulating the cooling fluid through the fuel cell and the heat exchanger after the temperature of the cooling fluid reaches the thermostat operating temperature.
    Type: Grant
    Filed: May 10, 2006
    Date of Patent: November 13, 2007
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Mitsuharu Imaseki, Takeshi Ushio, Yoshirou Shimoyama
  • Publication number: 20060216554
    Abstract: A cooling method for a fuel cell using a heat exchanger is provided. The method comprises the steps of: providing an ion exchanger in a circulation system for the cooling fluid; decreasing ion concentration in the cooling fluid by circulating the cooling fluid through the fuel cell and the ion exchanger when the temperature of the cooling fluid is below a thermostat operating temperature; distributing a portion of the cooling fluid discharged from the fuel cell, mixing the portion of the cooling fluid returning from the heat exchanger with another portion of the cooling fluid whose ion concentration has been decreased in the previous step, and returning the cooling fluid mixture to the fuel cell, when the temperature of the cooling fluid is approaching the thermostat operating temperature; and cooling the fuel cell by circulating the cooling fluid through the fuel cell and the heat exchanger after the temperature of the cooling fluid reaches the thermostat operating temperature.
    Type: Application
    Filed: May 10, 2006
    Publication date: September 28, 2006
    Applicant: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Mitsuharu Imaseki, Takeshi Ushio, Yoshirou Shimoyama
  • Publication number: 20060204797
    Abstract: A cooling method for a fuel cell using a heat exchanger is provided. The method comprises the steps of: providing an ion exchanger in a circulation system for the cooling fluid; decreasing ion concentration in the cooling fluid by circulating the cooling fluid through the fuel cell and the ion exchanger when the temperature of the cooling fluid is below a thermostat operating temperature; distributing a portion of the cooling fluid discharged from the fuel cell, mixing the portion of the cooling fluid returning from the heat exchanger with another portion of the cooling fluid whose ion concentration has been decreased in the previous step, and returning the cooling fluid mixture to the fuel cell, when the temperature of the cooling fluid is approaching the thermostat operating temperature; and cooling the fuel cell by circulating the cooling fluid through the fuel cell and the heat exchanger after the temperature of the cooling fluid reaches the thermostat operating temperature.
    Type: Application
    Filed: May 10, 2006
    Publication date: September 14, 2006
    Applicant: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Mitsuharu Imaseki, Takeshi Ushio, Yoshirou Shimoyama
  • Patent number: 7070873
    Abstract: A cooling method for a fuel cell using a heat exchanger is provided. The method comprises the steps of: providing an ion exchanger in a circulation system for the cooling fluid; decreasing ion concentration in the cooling fluid by circulating the cooling fluid through the fuel cell and the ion exchanger when the temperature of the cooling fluid is below a thermostat operating temperature; distributing a portion of the cooling fluid discharged from the fuel cell, mixing the portion of the cooling fluid returning from the heat exchanger with another portion of the cooling fluid whose ion concentration has been decreased in the previous step, and returning the cooling fluid mixture to the fuel cell, when the temperature of the cooling fluid is approaching the thermostat operating temperature; and cooling the fuel cell by circulating the cooling fluid through the fuel cell and the heat exchanger after the temperature of the cooling fluid reaches the thermostat operating temperature.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: July 4, 2006
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Mitsuharu Imaseki, Takeshi Ushio, Yoshirou Shimoyama
  • Patent number: 6905792
    Abstract: The present invention provides a cooling system of fuel cell, which solves the gas biting noise problem by trapping bubble in a coolant, gives protection to a stack (MEA) and the membrane of a humidifier by regulating the coolant pressure of fuel cell and improves the life of a ion exchanger by preventing foreign materials (carbonate ion etc.) from dissolving into the coolant.
    Type: Grant
    Filed: October 5, 2001
    Date of Patent: June 14, 2005
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Mitsuharu Imaseki, Takeshi Ushio, Yoshirou Shimoyama
  • Publication number: 20030072981
    Abstract: A cooling method for a fuel cell using a heat exchanger is provided. The method comprises the steps of: providing an ion exchanger in a circulation system for the cooling fluid; decreasing ion concentration in the cooling fluid by circulating the cooling fluid through the fuel cell and the ion exchanger when the temperature of the cooling fluid is below a thermostat operating temperature; distributing a portion of the cooling fluid discharged from the fuel cell, mixing the portion of the cooling fluid returning from the heat exchanger with another portion of the cooling fluid whose ion concentration has been decreased in the previous step, and returning the cooling fluid mixture to the fuel cell, when the temperature of the cooling fluid is approaching the thermostat operating temperature; and cooling the fuel cell by circulating the cooling fluid through the fuel cell and the heat exchanger after the temperature of the cooling fluid reaches the thermostat operating temperature.
    Type: Application
    Filed: October 15, 2002
    Publication date: April 17, 2003
    Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHA
    Inventors: Mitsuharu Imaseki, Takeshi Ushio, Yoshirou Shimoyama
  • Publication number: 20020061426
    Abstract: The present invention provides a cooling system of fuel cell, which solves the gas biting noise problem by trapping bubble in a coolant, gives protection to a stack (MEA) and the membrane of a humidifier by regulating the coolant pressure of fuel cell and improves the life of a ion exchanger by preventing foreign materials (carbonate ion etc.) from dissolving into the coolant.
    Type: Application
    Filed: October 5, 2001
    Publication date: May 23, 2002
    Applicant: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Mitsuharu Imaseki, Takeshi Ushio, Yoshirou Shimoyama