Patents by Inventor Yoshifumi Hirao

Yoshifumi Hirao 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).

  • FUEL CELL SYSTEM AND POWER GENERATION PERFORMANCE RECOVERY METHOD OF A FUEL CELL IN A FUEL CELL SYSTEM
    Publication number: 20150333349
    Abstract: To recovers the power generation performance of a fuel cell system, a power generation performance recovery method of the fuel cell system comprises: stopping supply of an oxidant gas to the fuel cell; and after a voltage generated by the fuel cell is decreased to or below a predetermined first value and when temperature of the fuel cell is decreased to or below a predetermined second value, restarting the supply of the oxidant gas to the fuel cell and thereby restarting power generation of the fuel cell, so as to produce water and thereby recover voltage of the fuel cell.
    Type: Application
    Filed: September 4, 2013
    Publication date: November 19, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshifumi HIRAO, Masaaki MATSUSUE, Tsuyoshi MARUO
  • Fuel cell system
    Patent number: 8227133
    Abstract: A fuel cell system that can dispose of an odorant through the use of a simple configuration and assure enhanced hydrogen safety. A hydrogenation device is positioned between a fuel tank and a fuel cell. The hydrogenation device incorporates a hydrogenation catalyst for hydrogenating the odorant.
    Type: Grant
    Filed: April 1, 2008
    Date of Patent: July 24, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Katsuhiko Oshikawa, Hideo Naohara, Yoshifumi Hirao
  • FUEL CELL SYSTEM
    Publication number: 20100092835
    Abstract: A fuel cell system that can dispose of an odorant through the use of a simple configuration and assure enhanced hydrogen safety. A hydrogenation device is positioned between a fuel tank and a fuel cell. The hydrogenation device incorporates a hydrogenation catalyst for hydrogenating the odorant.
    Type: Application
    Filed: April 1, 2008
    Publication date: April 15, 2010
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Katsuhiko Oshikawa, Hideo Naohara, Yoshifumi Hirao