Patents Assigned to Yamaha Hatsudoki Babushiki Kaisha
  • Ignition system for two cycle engine
    Patent number: 5170760
    Abstract: An improved method of operating a two cycle direct injected internal combustion engine so as to provide good ignition and combustion even when operating in a stratified condition. This is achieved either by extending the duration of firing of the spark plug either by extending a single firing or providing multiple firings per cycle or by changing the energy level across the gap of the spark plug during its firing.
    Type: Grant
    Filed: November 13, 1991
    Date of Patent: December 15, 1992
    Assignee: Yamaha Hatsudoki Babushiki Kaisha
    Inventors: Akira Yamada, Miyoshi Ishibashi