Patents by Inventor Iwao Utsumi

Iwao Utsumi 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).

  • Fuel control system for engine
    Patent number: 5174264
    Abstract: A fuel control system for an engine has a fuel injector which injects fuel into an intake passage of the engine. An airflow meter detects the amount of intake air of the engine. A controller controls the amount of fuel to be injected from the fuel injection means on the basis of a dulled value by dulling a present value of the output of the airflow meter so that the preceding value of the output of the airflow meter is reflected in the dulled value in a predetermined proportion. The degree of reflection of the preceding value of the output of the airflow meter in the dulled value is reduced when the relation between the value of the output of the airflow meter and the dulled value is inverted.
    Type: Grant
    Filed: November 8, 1991
    Date of Patent: December 29, 1992
    Assignee: Mazda Motor Corporation
    Inventors: Hideki Matsuoka, Iwao Utsumi, Isao Shibata