Patents by Inventor Koichi YASUKAWA

Koichi YASUKAWA 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).

  • Electric leak detector for a vehicle
    Patent number: 9696365
    Abstract: An electric leak detector (108) for a vehicle includes a coupling capacitor (210) that has a terminal (A) connected to an on-vehicle high voltage device (110) and a terminal (B) connected to a repetitive signal output circuit (212). The coupling capacitor (210) repeatedly performs a charge operation and a discharge operation in response to a repetitive signal (PLS). Determination thresholds are calculated based on a voltage applied to the terminal (A) of the coupling capacitor (210) and an atmospheric temperature. A detected charge period and a detected discharge period are compared with the determination thresholds, to thereby determine a leakage state.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: July 4, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koichi Yasukawa, Nobuya Toyooka
  • ELECTRIC LEAK DETECTOR FOR A VEHICLE
    Publication number: 20160091552
    Abstract: An electric leak detector (108) for a vehicle includes a coupling capacitor (210) that has a terminal (A) connected to an on-vehicle high voltage device (110) and a terminal (B) connected to a repetitive signal output circuit (212). The coupling capacitor (210) repeatedly performs a charge operation and a discharge operation in response to a repetitive signal (PLS). Determination thresholds are calculated based on a voltage applied to the terminal (A) of the coupling capacitor (210) and an atmospheric temperature. A detected charge period and a detected discharge period are compared with the determination thresholds, to thereby determine a leakage state.
    Type: Application
    Filed: February 18, 2015
    Publication date: March 31, 2016
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Koichi YASUKAWA, Nobuya TOYOOKA