Patents by Inventor Takahide Kuma

Takahide Kuma 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).

  • Learning control system of air-fuel ratio in electronic control engine
    Patent number: 4571683
    Abstract: This system computes final fuel injection amount TAU on the basis of the following formula;TAU=A.times.TP+B+JwhereA : a first learning termB : a second learning termTP : basic fuel injection amountJ : correction amountLearning control is effected by correcting the second learning term B during idling periods and by correcting the first learning term A when an engine has larger than a predetermined load.
    Type: Grant
    Filed: July 29, 1982
    Date of Patent: February 18, 1986
    Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
    Inventors: Nobuyuki Kobayashi, Toshiaki Isobe, Nobuhisa Ohkawa, Takahide Kuma
  • Engine idling rotational speed control device
    Patent number: 4462360
    Abstract: A stepping motor is driven to control an opening area of an intake air flow rate control valve such that an engine rotational speed in a substantially full-close position of a throttle valve is brought into a target rotational speed range related to at least an engine coolant temperature. An intake air quantity into an engine and engine rotational speed are detected to determine a ratio of the intake air quantity to the engine rotational speed. Downward control to the intake air flow rate control valve is inhibited when a ratio of intake air quantity into an engine to the engine rotational speed is smaller than a predetermined reference.
    Type: Grant
    Filed: August 11, 1982
    Date of Patent: July 31, 1984
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Nobuyuki Kobayashi, Hiroshi Ito, Takahide Kuma