Patents by Inventor Shigeo Hosogai

Shigeo Hosogai 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).

  • Catalyst deterioration-determining system for internal combustion engines using compressed natural gas
    Patent number: 6092369
    Abstract: A catalyst deterioration-determining system for an internal combustion engine has a catalyst arranged in the exhaust system, for purifying exhaust gases emitted from the engine, an oxygen concentration sensor arranged in the exhaust system at a location downstream of the catalyst, for detecting the concentration of oxygen present in the exhaust gases, and an ECU which controls the air-fuel ratio of an air-fuel mixture supplied to the engine in a feedback manner in response to the output from the oxygen concentration sensor. Determination of deterioration of the catalyst is carried out based on the output from the oxygen concentration sensor during execution of air-fuel ratio feedback control.
    Type: Grant
    Filed: November 18, 1998
    Date of Patent: July 25, 2000
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Shigeo Hosogai, Hiroshi Kubota, Shigeo Hidai