Patents by Inventor Keiji Yoeda

Keiji Yoeda 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).

  • Control apparatus and method for electromagnetically driven valves
    Patent number: 6276317
    Abstract: In control apparatus and method, an ECU detects the positions of intake valves of cylinders when an ignition switch is turned off. Then, the ECU continues supplying exciting current to first electromagnetic coils corresponding to completely closed intake valves to hold those intake valves in the completely closed state. The ECU brings to the intake valves that are not in the completely closed state at the time of determining the turning-off of the ignition switch, to the completely closed state. At the elapse of a predetermined time following the determination of turning-off of the ignition switch, the ECU stops supplying exciting current to the first electromagnetic coils of the intake valves to bring the intake valves to a held-open state.
    Type: Grant
    Filed: March 20, 2000
    Date of Patent: August 21, 2001
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Keiji Yoeda, Isao Matsumoto, Shouji Katsumata, Masaaki Tanaka