Patents by Inventor Kyosuke FUJITA

Kyosuke FUJITA 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 and spark plug
    Patent number: 11664645
    Abstract: A spark plug includes a housing, a porcelain insulator, a center electrode, a ground electrode, and a prechamber-defining portion. The prechamber-defining portion has a prechamber formed therein. The prechamber-defining portion has a plurality of spray holes. At least one of the spray holes is an upstream spray hole which is arranged upstream of a plug center axis in a gas flow within a main combustion chamber and designed such that and an angle which an extension in an opening direction makes with an inner wall surface of the prechamber is selected to be larger than 90°. A spark gap is formed upstream of a plug center axis in the gas flow within the main combustion chamber.
    Type: Grant
    Filed: November 17, 2021
    Date of Patent: May 30, 2023
    Assignee: DENSO CORPORATION
    Inventors: Daisuke Shimamoto, Kaori Doi, Akimitsu Sugiura, Syuhei Nakashima, Kyosuke Fujita
  • INTERNAL COMBUSTION ENGINE AND SPARK PLUG
    Publication number: 20220077662
    Abstract: A spark plug includes a housing, a porcelain insulator, a center electrode, a ground electrode, and a prechamber-defining portion. The prechamber-defining portion has a prechamber formed therein. The prechamber-defining portion has a plurality of spray holes. At least one of the spray holes is an upstream spray hole which is arranged upstream of a plug center axis in a gas flow within a main combustion chamber and designed such that and an angle which an extension in an opening direction makes with an inner wall surface of the prechamber is selected to be larger than 90°. A spark gap is formed upstream of a plug center axis in the gas flow within the main combustion chamber.
    Type: Application
    Filed: November 17, 2021
    Publication date: March 10, 2022
    Inventors: Daisuke SHIMAMOTO, Kaori DOI, Akimitsu SUGIURA, Syuhei NAKASHIMA, Kyosuke FUJITA