Patents by Inventor Keiichirou Misumi

Keiichirou Misumi 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).

  • Combustion diagnosis device for internal combustion engine
    Patent number: 9442042
    Abstract: A combustion diagnosis device for a diesel engine having a plurality of cylinders, including an engine speed sensor for detecting a rotational speed of each cylinder, an injection correction amount calculation unit for calculating an amount of correction for fuel injection of each cylinder in accordance with the engine speed sensor, a rotational fluctuation calculation unit for calculating a rotational fluctuation of each cylinder in accordance with the engine speed sensor, and a combustion state determination unit for determining a combustion state of a determination-target cylinder in accordance with the rotational fluctuation when the correction amount calculated by the injection correction amount calculation unit reaches an upper limit threshold value.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: September 13, 2016
    Assignee: ISUZU MOTORS LIMITED
    Inventors: Makoto Hoshi, Akira Hanari, Keiichirou Misumi
  • COMBUSTION DIAGNOSIS DEVICE FOR INTERNAL COMBUSTION ENGINE
    Publication number: 20130096805
    Abstract: A combustion diagnosis device for a diesel engine having a plurality of cylinders, including an engine speed sensor for detecting a rotational speed of each cylinder, an injection correction amount calculation unit for calculating an amount of correction for fuel injection of each cylinder in accordance with the engine speed sensor, a rotational fluctuation calculation unit for calculating a rotational fluctuation of each cylinder in accordance with the engine speed sensor, and a combustion state determination unit for determining a combustion state of a determination-target cylinder in accordance with the rotational fluctuation when the correction amount calculated by the injection correction amount calculation unit reaches an upper limit threshold value.
    Type: Application
    Filed: June 10, 2011
    Publication date: April 18, 2013
    Applicant: ISUZU MOTORS LIMITED
    Inventors: Makoto Hoshi, Akira Hanari, Keiichirou Misumi