Patents by Inventor Syuya KAWAHARA

Syuya KAWAHARA 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).

  • Diagnostic device
    Patent number: 10180462
    Abstract: An AC component ?I addition unit of a diagnostic device superimposes an alternating current on an output current of a fuel cell. A Zn calculation unit calculates a cell impedance with respect to the alternating current with regard to any of a plurality of cells. A diagnosis unit diagnoses that any cell is subjected to hydrogen deficiency when an absolute value of the cell impedance exceeds (absolute value of a reference impedance+a predetermined value ?). It is diagnosed that any cell is subjected to oxygen deficiency when the absolute value of the cell impedance is smaller than (absolute value of the reference impedance?a predetermined value ?).
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: January 15, 2019
    Assignees: Toyota Jidosha Kabushiki Kaisha, Nippon Soken, Inc.
    Inventors: Yuji Ishikawa, Takashi Yamamoto, Shigeki Hasegawa, Syuya Kawahara
  • DIAGNOSTIC DEVICE
    Publication number: 20170059663
    Abstract: An AC component ?I addition unit of a diagnostic device superimposes an alternating current on an output current of a fuel cell. A Zn calculation unit calculates a cell impedance with respect to the alternating current with regard to any of a plurality of cells. A diagnosis unit diagnoses that any cell is subjected to hydrogen deficiency when an absolute value of the cell impedance exceeds (absolute value of a reference impedance+a predetermined value ?). It is diagnosed that any cell is subjected to oxygen deficiency when the absolute value of the cell impedance is smaller than (absolute value of the reference impedance?a predetermined value ?).
    Type: Application
    Filed: August 19, 2016
    Publication date: March 2, 2017
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, NIPPON SOKEN, INC.
    Inventors: Yuji ISHIKAWA, Takashi YAMAMOTO, Shigeki HASEGAWA, Syuya KAWAHARA