Patents by Inventor Yasushi Hiratsuka

Yasushi Hiratsuka 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).

  • Method of diagnosing glow plug and glow plug drive control device
    Patent number: 9453491
    Abstract: The presence or absence of degradation and abnormality is determined with high reliability by measuring a resistance value of a glow plug, which is in an operating state, as a latest resistance value. A method then determines whether or not the rate of the change of the latest resistance value with respect to an initial resistance value of the glow plug exceeds a first predetermined value. The method also determines whether or not the rate of the change of the latest resistance value with respect to a last resistance value that is a resistance value of the glow plug, which has been recently measured at the time of the acquisition of the latest resistance value, exceeds a second predetermined value when the rate of change of the latest resistance value with respect to the initial resistance value of the glow plug exceeds the first predetermined value.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: September 27, 2016
    Assignee: Bosch Corporation
    Inventors: Yutaka Tanaka, Tomohiro Nakamura, Yoshihito Fujishiro, Yasuo Toyoshima, Yasushi Hiratsuka
  • METHOD OF DIAGNOSING GLOW PLUG AND GLOW PLUG DRIVE CONTROL DEVICE
    Publication number: 20140216384
    Abstract: It is possible to determine the presence or absence of the degradation and abnormality of a glow plug with high reliability using a relatively simply procedure.
    Type: Application
    Filed: August 13, 2012
    Publication date: August 7, 2014
    Applicant: BOSCH CORPORATION
    Inventors: Yutaka Tanaka, Tomohiro Nakamura, Yoshihito Fujishiro, Yasuo Toyoshima, Yasushi Hiratsuka