Patents by Inventor Eiji Kogiso

Eiji Kogiso 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).

  • Misfire detector using linear detection of crankshaft angular speed
    Patent number: 7197916
    Abstract: A misfire detector detects a misfire in a cylinder based on a maximum value and the minimum value of the angular speed. A first crank angle range is defined in such a manner as to include a crank angle in which the angular speed is maximum during a power stroke. A second crank angle range is defined in such a manner as to include a crank angle in which the angular speed is minimum during the power stroke. The maximum value of the angular speed is calculated within the first crank angle range, and the minimum value of the angular speed is calculated within the second crank angle range. The calculated maximum and minimum values are brought close to actual values to enhance a reliability of the misfire detector.
    Type: Grant
    Filed: April 4, 2005
    Date of Patent: April 3, 2007
    Assignee: Denso Corporation
    Inventors: Koichiro Matsumoto, Naoki Kokubo, Eiji Kogiso, Takashi Kawashima
  • Misfire detector
    Publication number: 20050217356
    Abstract: A misfire detector detects a misfire in a cylinder based on a maximum value and the minimum value of the angular speed. A first crank angle range is defined in such a manner as to include a crank angle in which the angular speed is maximum during a power stroke. A second crank angle range is defined in such a manner as to include a crank angle in which the angular speed is minimum during the power stroke. The maximum value of the angular speed is calculated within the first crank angle range, and the minimum value of the angular speed is calculated within the second crank angle range. The calculated maximum and minimum values are brought close to actual values to enhance a reliability of the misfire detector.
    Type: Application
    Filed: April 4, 2005
    Publication date: October 6, 2005
    Inventors: Koichiro Matsumoto, Naoki Kokubo, Eiji Kogiso, Takashi Kawashima