Patents by Inventor Ikuo Tamura

Ikuo Tamura 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).

  • Diagnosing system for an exhaust gas recirculation system of an automotive engine
    Patent number: 4723528
    Abstract: An exhaust gas recirculation system has an EGR passage communicating an exhaust pipe of an engine with an intake passage of the engine and an EGR valve provided in the EGR passage. Flow rate of recirculated gas in the EGR passage is detected and an actual EGR rate signal is produced dependent on the flow rate. A desired EGR rate signal including an allowable range is obtained in accordance with opening degree of the EGR valve. A trouble signal is generated as an alarm signal when the actual EGR rate signal is out of the allowable range.
    Type: Grant
    Filed: March 2, 1987
    Date of Patent: February 9, 1988
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventor: Ikuo Tamura