Patents Assigned to Yanmar Deisel Engine Co., Ltd.
  • Gas engine
    Patent number: 4903656
    Abstract: A gas engine of a pre-chamber type in which a pre-chamber is arranged in communication to a main combustion chamber, an intake passage is arranged to supply lean mixture to the main chamber, a gas pipe is provided to form rich mixture by fuel gas in the pre-chamber, and a spark plug adapted to ignite the rich mixture in the pre-chamber prior to the combustion of lean mixture in the main combustion chamber, is characterized in that an area of a section of the pre-chamber gradually decreases toward the main combustion chamber.
    Type: Grant
    Filed: December 29, 1988
    Date of Patent: February 27, 1990
    Assignee: Yanmar Deisel Engine Co., Ltd.
    Inventors: Touru Nakazono, Yoshihiro Natsume, Takashi Furuta