Patents by Inventor Takeaki Kudo

Takeaki Kudo 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).

  • Engine control system
    Patent number: 11835001
    Abstract: A control system for an engine including intake and exhaust valve phase variable devices and a control device is provided. At an engine temperature below a first determination temperature, the control is performed so that an exhaust valve close timing is at or retarded from the exhaust top dead center, an intake valve open timing is retarded from the exhaust valve close timing, and the fuel supply to the combustion chamber starts in an intake stroke on a retarding side of the exhaust valve close timing. At the engine temperature above the first determination temperature and below a second determination temperature, the control is performed so that a negative overlap with both the exhaust and intake valves closed during a period including the exhaust top dead center, or a positive overlap with both the exhaust and intake valves opened during a period including the exhaust top dead center, occurs.
    Type: Grant
    Filed: March 23, 2023
    Date of Patent: December 5, 2023
    Assignee: Mazda Motor Corporation
    Inventors: Takeaki Kudo, Junki Hori, Masatoshi Seto, Tatsuya Fujikawa, Masahisa Yamakawa
  • ENGINE CONTROL SYSTEM
    Publication number: 20230383702
    Abstract: A control system for an engine including intake and exhaust valve phase variable devices and a control device is provided. At an engine temperature below a first determination temperature, the control is performed so that an exhaust valve close timing is at or retarded from the exhaust top dead center, an intake valve open timing is retarded from the exhaust valve close timing, and the fuel supply to the combustion chamber starts in an intake stroke on a retarding side of the exhaust valve close timing. At the engine temperature above the first determination temperature and below a second determination temperature, the control is performed so that a negative overlap with both the exhaust and intake valves closed during a period including the exhaust top dead center, or a positive overlap with both the exhaust and intake valves opened during a period including the exhaust top dead center, occurs.
    Type: Application
    Filed: March 23, 2023
    Publication date: November 30, 2023
    Inventors: Takeaki Kudo, Junki Hori, Masatoshi Seto, Tatsuya Fujikawa, Masahisa Yamakawa