Patents by Inventor Shizuo Ishizawa

Shizuo Ishizawa 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).

  • Internal combustion engine with fuel injector
    Patent number: 4313410
    Abstract: An engine is equipped with a fuel injector in an intake passageway immediately upstream of an intake valve. Air introduced from the intake passageway upstream of a throttle valve is ejected toward a clearance between the valve head of the intake valve and a valve seat, when the intake valve is opened. The ejected air stream strikes against the sprayed fuel injected from the fuel injector to improve the atomization of injected fuel and to form homogeneous air-fuel mixture to be inducted into the combustion chamber of the engine.
    Type: Grant
    Filed: October 17, 1980
    Date of Patent: February 2, 1982
    Assignee: Nissan Motor Company, Limited
    Inventors: Kazuya Kunii, Saburo Tsutsumi, Shizuo Ishizawa
  • Internal combustion engine with an exhaust gas purifying system
    Patent number: 4278063
    Abstract: An exhaust gas purifying system for an internal combustion engine including at least one combustion chamber connected to an intake port through an intake valve. The system comprises a first passage for passing a portion of exhaust gases discharged from the combustion chamber, a second passage for passing air, a fluid passage, at least one fluid injection nozzle having its one end connected to the fluid passage and the other end extending into the intake port toward the combustion chamber, the fluid injection nozzle adapted to open when the intake valve opens, and means responsive to engine operating condition for connecting the fluid passage to the first passage to permit injection of exhaust gases through the fluid injection nozzle into the combustion chamber during acceleration and for connecting the fluid passage to the second passage to permit injection of air through the fluid injection nozzle into the combustion chamber during normal operation or idling.
    Type: Grant
    Filed: October 1, 1979
    Date of Patent: July 14, 1981
    Assignee: Nissan Motor Company, Limited
    Inventors: Ken Nakamura, Kunihiko Sugihara, Shizuo Ishizawa
  • Internal combustion engine with fuel injector
    Patent number: 4269153
    Abstract: An engine is equipped with a fuel injector in an intake passageway immediately upstream of an intake valve. Air introduced from the intake passageway upstream of a throttle valve is ejected toward a clearance between the valve head of the intake valve and a valve seat, when the intake valve is opened. The ejected air stream strikes against the sprayed fuel injected from the fuel injector to improve the atomization of injected fuel and to form homogeneous air-fuel mixture to be inducted into the combustion chamber of the engine.
    Type: Grant
    Filed: April 4, 1979
    Date of Patent: May 26, 1981
    Assignee: Nissan Motor Company, Limited
    Inventors: Kazuya Kunii, Saburo Tsutsumi, Shizuo Ishizawa