Patents by Inventor Makoto MATSUMAE

Makoto MATSUMAE 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).

  • Method and device for measuring output characteristic of air fuel ratio detecting module
    Patent number: 8573042
    Abstract: This disclosure provides a method for measuring an output characteristic of an air fuel ratio sensor based on an output value of the air fuel ratio sensor at the time of changing a fuel injection amount. Under a predetermined condition, an increase in the fuel injection amount is started from a particular cylinder and the increase in the fuel injection amount is continued for a given time period, or a decrease in the fuel injection amount is started from the particular cylinder and the decrease in the fuel injection amount is continued for the given time period. Therefore, the output characteristic of the air fuel ratio detecting module can be measured with sufficient accuracy, regardless of the contacting strength of emission gas for every cylinder against the air fuel ratio detecting module.
    Type: Grant
    Filed: November 11, 2010
    Date of Patent: November 5, 2013
    Assignee: Mazda Motor Corporation
    Inventors: Hajime Suetsugu, Makoto Matsumae
  • METHOD AND DEVICE FOR MEASURING OUTPUT CHARACTERISTIC OF AIR FUEL RATIO DETECTING MODULE
    Publication number: 20110113871
    Abstract: This disclosure provides a method for measuring an output characteristic of an air fuel ratio sensor based on an output value of the air fuel ratio sensor at the time of changing a fuel injection amount. Under a predetermined condition, an increase in the fuel injection amount is started from a particular cylinder and the increase in the fuel injection amount is continued for a given time period, or a decrease in the fuel injection amount is started from the particular cylinder and the decrease in the fuel injection amount is continued for the given time period. Therefore, the output characteristic of the air fuel ratio detecting module can be measured with sufficient accuracy, regardless of the contacting strength of emission gas for every cylinder against the air fuel ratio detecting module.
    Type: Application
    Filed: November 11, 2010
    Publication date: May 19, 2011
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Hajime SUETSUGU, Makoto MATSUMAE