Patents by Inventor Kiyohito Watanabe

Kiyohito Watanabe 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).

  • Abnormal combustion detection apparatus and method for internal combustion engine
    Patent number: 6105552
    Abstract: An abnormal combustion detection apparatus for an internal combustion engine quickly detects the occurrence of preignition by using a knock sensor. When the knock sensor detects an engine knocking, the ignition timing is delayed. If despite the delay of ignition timing, the knocking is not decreased and the air-fuel ratio detected after the delay of ignition timing is less than the air-fuel ratio detected before the delay of ignition timing, it is determined that preignition has occurred.
    Type: Grant
    Filed: February 23, 1999
    Date of Patent: August 22, 2000
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Katsuhiko Arisawa, Shinichi Okabe, Tokio Kohama, Kiyohito Watanabe