Patents by Inventor Hironobu Suyama

Hironobu Suyama 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).

  • Diagnosis method for solenoid valve based on noise detection
    Patent number: 7877194
    Abstract: A solenoid valve includes cyclically energizing and deenergizing a solenoid of the solenoid valve to repeatedly fully open and fully close the solenoid valve. When the energizing and deenergizing causes collisions of a moving member of the solenoid valve against at least one of a first and a second seat formed in a housing of the solenoid valve, noises are thus generated by the collisions and occurrence intervals of the noises are detected. Whether the solenoid valve is in normal or abnormal condition is diagnosed based on the detected occurrence intervals of the noises.
    Type: Grant
    Filed: November 17, 2006
    Date of Patent: January 25, 2011
    Assignee: Denso Corporation
    Inventor: Hironobu Suyama
  • Diagnosis method for solenoid valve based on noise detection
    Publication number: 20070114481
    Abstract: According to the present invention, there is provided a diagnosis method for a solenoid valve which includes: energizing and deenergizing cyclically a solenoid of the solenoid valve to repeatedly fully open and fully close the solenoid valve; when the energizing and deenergizing causes collisions of a moving member of the solenoid valve against at least one of a first and a second seat formed in a housing of the solenoid valve and noises are thus generated by the collisions, detecting occurrence intervals of the noises; and diagnosing whether the solenoid valve is in normal or abnormal condition based on the detected occurrence intervals of the noises.
    Type: Application
    Filed: November 17, 2006
    Publication date: May 24, 2007
    Applicant: Denso Corporation
    Inventor: Hironobu Suyama