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Yu Motoyama

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Patents Grantslast 30 patents

  • Information Patent Grant

    Operating method of two stroke direct injected engine
    • Patent number 6,109,223
    • Issue date Aug 29, 2000
    • Yamaha Hatsudoki Kabushiki Kaisha
    • Yu Motoyama
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Ignition control system for engine
    • Patent number 6,085,733
    • Issue date Jul 11, 2000
    • Yamaha Hatsudoki Kabushiki Kaisha
    • Yu Motoyama
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Operating control system for 2 cycle direct injection engine
    • Patent number 6,039,012
    • Issue date Mar 21, 2000
    • Yamaha Hatsudoki Kabushiki Kaisha
    • Yu Motoyama
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Engine control and wall temperature sensor
    • Patent number 5,946,908
    • Issue date Sep 7, 1999
    • Yamaha Hatsudoki Kabushiki Kaisha
    • Yu Motoyama
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Operation control system for direct injection 2 cycle engine
    • Patent number 5,826,557
    • Issue date Oct 27, 1998
    • Yamaha Hatsudoki Kabushiki Kaisha
    • Yu Motoyama
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Engine control system
    • Patent number 5,732,674
    • Issue date Mar 31, 1998
    • Yamaha Hatsudoki Kabushiki Kaisha
    • Yu Motoyama
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Engine control system
    • Patent number 5,690,063
    • Issue date Nov 25, 1997
    • Yamaha Hatsudoki Kabushiki Kaisha
    • Yu Motoyama
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Air fuel ratio detecting device and system for engines
    • Patent number 5,682,870
    • Issue date Nov 4, 1997
    • Yamaha Hatsudoki Kabushiki Kaisha
    • Yu Motoyama
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Fuel injection control
    • Patent number 5,613,468
    • Issue date Mar 25, 1997
    • Yamaha Hatsudoki Kabushiki Kaisha
    • Takeru Ibara
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Fuel injection system for engine
    • Patent number 5,211,145
    • Issue date May 18, 1993
    • Yamaha Hatsudoki Kabushiki Kaisha
    • Ryuichi Ichikawa
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Fuel injection system
    • Patent number 5,193,508
    • Issue date Mar 16, 1993
    • Yamaha Hatsudoki Kabushiki Kaisha
    • Yu Motoyama
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Injection arrangement for improving fuel consumption
    • Patent number 5,190,006
    • Issue date Mar 2, 1993
    • Yamaha Hatsudoki Kabushiki Kaisha
    • Yu Motoyama
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Operation control device for in-cylinder injection engine
    • Patent number 5,181,493
    • Issue date Jan 26, 1993
    • Yamaha Hatsudoki Kabushiki Kaisha
    • Yu Motoyama
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Fuel injection system including supplemental fuel injector
    • Patent number 5,136,990
    • Issue date Aug 11, 1992
    • Yamaha Hatsudoki Kabushiki Kaisha
    • Yu Motoyama
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Air fuel injector assembly
    • Patent number 5,123,399
    • Issue date Jun 23, 1992
    • Yamaha Hatsudoki Kabushiki Kaisha
    • Yu Motoyama
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Two cycle internal combustion engine
    • Patent number 5,113,829
    • Issue date May 19, 1992
    • Yamaha Hatsudoki Kabushiki Kaisha
    • Yu Motoyama
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Fuel injection system for an engine
    • Patent number 5,105,792
    • Issue date Apr 21, 1992
    • Yamaha Hatsudoki Kabushiki Kaisha
    • Ryuichi Ichikawa
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Fuel injection system and method for engine
    • Patent number 5,095,873
    • Issue date Mar 17, 1992
    • Yamaha Hatsudoki Kabushiki Kaisha
    • Yu Motoyama
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Fuel injecting system for two cycle engine
    • Patent number 5,092,287
    • Issue date Mar 3, 1992
    • Yamaha Hatsudoki Kabushiki Kaisha
    • Yu Motoyama
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Exhaust control valve system for parallel multi-cylinder two-cycle...
    • Patent number 5,063,888
    • Issue date Nov 12, 1991
    • Yamaha Hatsudoki Kabushiki Kaisha
    • Toshikazu Ozawa
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Exhaust control valve system for parallel multi-cylinder two-cycle...
    • Patent number 5,063,887
    • Issue date Nov 12, 1991
    • Yamaha Hatsudoki Kabushiki Kaisha
    • Toshikazu Ozawa
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS