Patents by Inventor Koukichi Fujimori

Koukichi Fujimori 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).

  • Direct-fuel-injection-type spark-ignition internal combustion engine
    Patent number: 6460509
    Abstract: A direct-fuel-injection-type spark-ignition internal combustion engine is disclosed. The engine comprises a spark plug, a cavity formed on the top surface of the piston, and a fuel injection valve for injecting fuel into the cavity in nearly the shape of a fan having a relative small thickness. In the engine, the side wall of the cavity facing the fuel injection valve, for leading the fuel to the vicinity of the spark plug, has a horizontal sectional shape consisting of a part of an ellipse shape of which two foci are at a position of the injection hole of the fuel injection valve and a position near to the spark plug in plan view, and the side wall has a deflecting portion to deflect the fuel toward the inside of the cavity.
    Type: Grant
    Filed: February 1, 2000
    Date of Patent: October 8, 2002
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Nobuyuki Muramatsu, Yasuhito Tsutsumi, Tatsuo Kobayashi, Toyokazu Baika, Souichi Matusita, Shizuo Abe, Takashi Hashima, Koukichi Fujimori