Patents by Inventor Yoshihiko Matsuda

Yoshihiko Matsuda 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).

  • CIRCUIT BREAKER AND OPENING AND CLOSING METHOD THEREOF
    Publication number: 20080156775
    Abstract: A circuit breaker comprising a vacuum valve; an electromagnet including a first coil for driving an operating shaft of the vacuum valve toward an opening direction by electromagnetic repulsion, a movable core and a permanent magnet; and an operating mechanism which excites the first coil to close the vacuum valve, holds the vacuum valve closed by an attractive force of the permanent magnet and excites the first coil in a direction reverse to an excitation direction in closing operation to open the vacuum valve. In the circuit breaker, together with the first coil, a second coil which is excited simultaneously with an electromagnetic repulsion coil for electromagnetic repulsion in quick opening operation by electromagnetic repulsion is provided in the electromagnet.
    Type: Application
    Filed: December 20, 2007
    Publication date: July 3, 2008
    Inventors: Ayumu Morita, Minoru Hosoda, Yoshihiko Matsuda, Masato Suzuki, Keiichi Miyashita, Shigetoshi Oouchi, Masaaki Saitou, Akihito Yano
  • System for controlling internal combustion engine using knocking and overtemperature preventing fuel correction
    Patent number: 4727841
    Abstract: In an internal combustion engine where the ignition timing is retarded to avoid knocking and an overtemperature of the engine, a fuel incremental amount is calculated by using a curvilinear function having a positive secondary differential value with respect to the retard amount of the ignition timing.
    Type: Grant
    Filed: August 29, 1986
    Date of Patent: March 1, 1988
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kiyoo Hirose, Yoshihiko Matsuda
  • Method of controlling air-fuel ratio and ignition timing in internal combustion engine and apparatus therefor
    Patent number: 4658785
    Abstract: In a steady running condition of a vehicle, an air-fuel ratio is controlled to be equalized in value to a target air-fuel lener than a stoichiometric air-fuel ratio and an ignition timing is controlled to be equalized in value to a required ignition timing, so that a fuel consumption can be improved.
    Type: Grant
    Filed: August 20, 1985
    Date of Patent: April 21, 1987
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tadahisa Naganawa, Yoshihiko Matsuda
  • Method of controlling air-fuel ratio and ignition timing in internal combustion engine and apparatus therefor
    Patent number: 4559915
    Abstract: In a steady running condition of a vehicle, an air-fuel ratio is controlled to be equalized in value to a target air-fuel ratio leaner than a stoichiometric air-fuel ratio and an ignition timing is controlled to be equalized in value to a required ignition timing, so that a fuel consumption can be improved.
    Type: Grant
    Filed: March 15, 1984
    Date of Patent: December 24, 1985
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tadahisa Naganawa, Yoshihiko Matsuda
  • Method and apparatus for controlling the air-fuel ratio in an internal-combustion engine
    Patent number: 4454846
    Abstract: In an internal-combustion engine disposed in a vehicle, when the engine is in an idle state and the vehicle speed is not equal to zero and is less than a predetermined value, the air-fuel ratio of the engine is controlled so that the air-fuel mixture is on the lean side of the stoichiometric air-fuel ratio. In addition, even after the vehicle speed becomes zero, the air-fuel ratio is controlled so that the air-fuel mixture is on the lean side for a predetermined time period.
    Type: Grant
    Filed: June 21, 1983
    Date of Patent: June 19, 1984
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yukio Suzuki, Yoshihiko Matsuda