Patents by Inventor Mitsuhiro Sonohara

Mitsuhiro Sonohara 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).

  • Fatigue failure diagnostic method of turbocharger and fatigue failure diagnostic apparatus for turbocharger
    Patent number: 7181959
    Abstract: A fatigue failure diagnostic method of a turbocharger in accordance with the present invention is a method for diagnosing the fatigue failure of a turbocharger (5), comprising the steps of measuring the revolution speed of the turbocharger (5), computing an accumulated fatigue value (Ft) based on the measured revolution speed, and executing the fatigue failure judgment of the turbocharger (5) by comparing the computed accumulated fatigue value (Ft) and the prescribed fatigue limit value (F1).
    Type: Grant
    Filed: June 2, 2005
    Date of Patent: February 27, 2007
    Assignee: Isuzu Motors Limited
    Inventors: Shunji Matsumoto, Mitsuhiro Sonohara
  • Fatigue failure diagnostic method of turbocharger and fatigue failure diagnostic apparatus for turbocharger
    Publication number: 20050274112
    Abstract: A fatigue failure diagnostic method of a turbocharger in accordance with the present invention is a method for diagnosing the fatigue failure of a turbocharger (5), comprising the steps of measuring the revolution speed of the turbocharger (5), computing an accumulated fatigue value (Ft) based on the measured revolution speed, and executing the fatigue failure judgment of the turbocharger (5) by comparing the computed accumulated fatigue value (Ft) and the prescribed fatigue limit value (F1).
    Type: Application
    Filed: June 2, 2005
    Publication date: December 15, 2005
    Applicant: Isuzu Motors Limited
    Inventors: Shunji Matsumoto, Mitsuhiro Sonohara