Patents by Inventor Akira Ishizuya

Akira Ishizuya 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).

  • Patent number: 3994270
    Abstract: An intake and exhaust system for an internal combustion engine of the type having an auxiliary combustion chamber associated with each main combustion chamber, and wherein the overall air-fuel charge to all combustion chambers is leaner than the stoichiometric ratio, so that excess air is present in the exhaust gases. The system includes integrated intake manifolds, one for connection with the main combustion chamber and the other for connection with the auxiliary combustion chamber, and an exhaust manifold for connection with the main combustion chambers. The exhaust manifold includes a stainless steel liner enveloped within and spaced from a metal casting in order to retain the heat of the exhaust gases so that the exhaust gas temperature remains at or above the temperature at which the unburned hydrocarbons in the exhaust gases will continue to burn. This temperature also promotes oxidation of carbon monoxide to carbon dioxide.
    Type: Grant
    Filed: March 12, 1975
    Date of Patent: November 30, 1976
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Soichi Nakano, Akira Ishizuya
  • Patent number: 3994271
    Abstract: A manifold system for a multi-cylinder internal combustion piston engine has an intake manifold for supplying a lean mixture to the main combustion chambers of the engine and a rich mixture to the auxiliary combustion chambers thereof. In such an engine, each main combustion chamber is connected to its respective auxiliary combustion chamber through a torch opening. The manifold system also includes an exhaust manifold having improved means for heating the lean mixture and the rich mixture in the intake manifold, and constructed to provide a longer residence time for the exhaust gases and to promote a high mean temperature so that the chemical reaction between the excess air and carbon monoxide and unburned hydrocarbons may add additional heat, to the end that exhaust emissions to the atmosphere of carbon monoxide and unburned hydrocarbons are minimized.
    Type: Grant
    Filed: January 20, 1975
    Date of Patent: November 30, 1976
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Akira Ishizuya, Soichi Nakano, Yasumichi Ohama