Patents by Inventor Hirohide Abe

Hirohide Abe 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 apparatus for an engine
    Patent number: 6792346
    Abstract: A cold-state emission-reducing strategy wherein a diagnostic apparatus examines for possible malfunctions of a control unit during cold start. The diagnosis judges that the strategy is faulty if the cumulative amount of fuel injection is equal to or smaller than a predeterminable threshold value for a faulty judgement. Thus, the abnormality of the cold-state emission-reducing strategy is accurately and easily detected, by merely calculating the cumulative amount of an injection pulse width for the injector or the cumulative amount of fuel flow during a predeterminable cumulating time period after engine start, and comparing the calculated cumulative amount with the predeterminable judgement threshold.
    Type: Grant
    Filed: March 21, 2003
    Date of Patent: September 14, 2004
    Assignee: Mazda Motor Corporation
    Inventors: Hiroyuki Takebayashi, Hirohide Abe, Kouichi Terada
  • Diagnostic apparatus for an engine
    Publication number: 20030212484
    Abstract: A cold-state emission-reducing strategy wherein a diagnostic apparatus examines for possible malfunctions of a control unit during cold start. The diagnosis judges that the strategy is faulty if the cumulative amount of fuel injection is equal to or smaller than a predetermineble threshold value for a faulty judgement. Thus, the abnormality of the cold-state emission-reducing strategy is accurately and easily detected, by merely calculating the cumulative amount of an injection pulse width for the injector or the cumulative amount of fuel flow during a predeterminable cumulating time period after engine start, and comparing the calculated cumulative amount with the predeterminable judgement threshold.
    Type: Application
    Filed: March 21, 2003
    Publication date: November 13, 2003
    Applicant: Mazda Motor Corporation
    Inventors: Hiroyuki Takebayashi, Hirohide Abe, Kouichi Terada