Patents by Inventor Yasunori Ehar

Yasunori Ehar 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).

  • Air-fuel ratio control system for internal combustion engines
    Patent number: 5473889
    Abstract: An air-fuel ratio control system for an internal combustion engine detects a central value of an output from a first exhaust gas component concentration sensor arranged in an exhaust passage at a location upstream of a catalytic converter and having an output characteristic which is substantially proportional to the concentration of a component in the exhaust gases. The central value is corrected based on the output from the first exhaust gas component concentration sensor, when an output from a second exhaust gas concentration sensor arranged downstream of the catalytic converter falls within a predetermined range. The output from the first exhaust gas component concentration sensor is corrected based on the corrected central value. An air-fuel ratio of a mixture supplied to the engine is corrected based on the corrected output value from the first exhaust gas component concentration sensor.
    Type: Grant
    Filed: September 22, 1994
    Date of Patent: December 12, 1995
    Assignee: Honda Giken Kogyo K.K. (Honda Motor Co., Ltd. in English)
    Inventors: Yasunori Ehar, Ken Ogawa, Joji Hijikata