Patents by Inventor Kiyohisa Inoue

Kiyohisa Inoue 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).

  • Deterioration determination apparatus for airflow meter and deterioration determination method
    Patent number: 8739614
    Abstract: When a deterioration determination apparatus determines a degree of deterioration in characteristics of an airflow meter, a driving condition of an engine is maintained at a specified condition in which intake air flow rate is greater than a specified value. A measurement error of the airflow meter is computed based on an intake air flow rate measured with the airflow meter. The degree of deterioration due to stain is determined based on the measurement error.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: June 3, 2014
    Assignee: Denso Corporation
    Inventors: Hidehito Tsujii, Kiyohisa Inoue
  • DETERIORATION DETERMINATION APPARATUS FOR AIRFLOW METER AND DETERIORATION DETERMINATION METHOD
    Publication number: 20120111100
    Abstract: When a deterioration determination apparatus determines a degree of deterioration in characteristics of an airflow meter, a driving condition of an engine is maintained at a specified condition in which intake air flow rate is greater than a specified value. A measurement error of the airflow meter is computed based on an intake air flow rate measured with the airflow meter. The degree of deterioration due to stain is determined based on the measurement error.
    Type: Application
    Filed: October 20, 2011
    Publication date: May 10, 2012
    Applicant: DENSO CORPORATION
    Inventors: Hidehito TSUJII, Kiyohisa INOUE
  • Engine control system
    Patent number: 7062910
    Abstract: In a case where an oscillation frequency per unit time of a first feedback amount of supercharging pressure (VNT) control exceeds a judgment value, or in a case where an oscillation frequency per unit time of a second feedback amount of exhaust gas recirculation (EGR) control exceeds a judgment value, it is determined that a target VNT opening degree or a target EGR opening degree is in a hunting state. In the case where the hunting of the target VNT opening degree or the target EGR opening degree is detected, a first or a second gain correction coefficient multiplied to the first or the second feedback amount is changed to a value to decrease an absolute value of the first or the second feedback amount.
    Type: Grant
    Filed: January 19, 2005
    Date of Patent: June 20, 2006
    Assignee: Denso Corporation
    Inventor: Kiyohisa Inoue
  • Engine control system
    Publication number: 20050155348
    Abstract: In a case where an oscillation frequency per unit time of a first feedback amount of supercharging pressure (VNT) control exceeds a judgment value, or in a case where an oscillation frequency per unit time of a second feedback amount of exhaust gas recirculation (EGR) control exceeds a judgment value, it is determined that a target VNT opening degree or a target EGR opening degree is in a hunting state. In the case where the hunting of the target VNT opening degree or the target EGR opening degree is detected, a first or a second gain correction coefficient multiplied to the first or the second feedback amount is changed to a value to decrease an absolute value of the first or the second feedback amount.
    Type: Application
    Filed: January 19, 2005
    Publication date: July 21, 2005
    Applicant: DENSO CORPORATION
    Inventor: Kiyohisa Inoue