Patents by Inventor Harumi Furukawa

Harumi Furukawa 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).

  • Engine control device and control method thereof
    Patent number: 7401604
    Abstract: An engine control device and method that prevents fuel injection quantity from becoming unstable due to a rapid change of a correction quantity even in a predetermined operation state such as acceleration time and thus stabilizes an air-fuel ratio. Under a predetermined operating state, even when feedback control of oxygen in exhaust gas is stopped, a correction quantity immediately before the predetermined operating state is held by a correction quantity storage part and the correction of the fuel injection time is performed based on the correction quantity.
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: July 22, 2008
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventors: Harumi Furukawa, Yoshitsugu Kosugi
  • Engine Control Device and Control Method Thereof
    Publication number: 20070199552
    Abstract: An engine control device and method that prevents fuel injection quantity from becoming unstable due to a rapid change of a correction quantity even in a predetermined operation state such as acceleration time and thus stabilizes an air-fuel ratio. Under a predetermined operating state, even when feedback control of oxygen in exhaust gas is stopped, a correction quantity immediately before the predetermined operating state is held by a correction quantity storage part and the correction of the fuel injection time is performed based on the correction quantity.
    Type: Application
    Filed: February 20, 2007
    Publication date: August 30, 2007
    Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Harumi FURUKAWA, Yoshitsugu KOSUGI