Patents by Inventor Nobushisa Ohkawa

Nobushisa Ohkawa 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).

  • Method and apparatus for controlling the idling speed of an engine wherein the amount of air provided to the engine is increased by a predetermined amount when the engine speed becomes equal to zero
    Patent number: 4417553
    Abstract: An engine has a main intake passage having a throttle valve therein. A bypass passage is branched off from the main intake passage located upstream of the throttle valve and is connected to the main intake passage located downstream of the throttle valve. A flow control valve, actuated by a stepper motor, is arranged in the bypass passage. The step position of the stepper motor is so controlled that the idling speed becomes equal to a desired speed. When an engine stall takes place and, then, the engine is started again, the step motor is rotated by five steps in a rotating direction wherein the flow area of the flow control valve is increased.
    Type: Grant
    Filed: September 15, 1981
    Date of Patent: November 29, 1983
    Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
    Inventors: Nobushisa Ohkawa, Hiroshi Itoh