Patents by Inventor Kiyohisa Tomono

Kiyohisa Tomono 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).

  • Duty ratio control method for solenoid control valve means
    Patent number: 4539967
    Abstract: A method of controlling the duty ratio of operation of a solenoid control valve in a fluid passage to control the flow rate of fluid in the fluid passage to a desired value. A flow rate value range is divided into a plurality of flow rate value regions between first and second extreme flow rate values which the fluid can assume when the duty ratio assumes corresponding minimum and maximum values. A first predetermined duty ratio value is preset corresponding to each of the divided regions and dependent upon the magnitude of manufacturing variations of the duty ratio-to-flow characteristic of the valve. A second larger predetermined duty ratio value is preset corresponding to each of the divided regions.
    Type: Grant
    Filed: June 25, 1984
    Date of Patent: September 10, 1985
    Assignee: Honda Giken Kogyo K.K.
    Inventors: Toyohei Nakajima, Kiyohisa Tomono