Patents by Inventor Tetsuya Kuwayama

Tetsuya Kuwayama 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 driving a solenoid proportional control valve utilized for flow rate control
    Patent number: 7387289
    Abstract: In a method for driving a solenoid proportional control valve (44) used for flow rate control of a common rail system pump adapted to regulate flow rate by regulating the duty ratio of a pulse voltage applied to a solenoid coil (F) of a solenoid (44E), when an operating condition liable to cause hysteresis in the operation of the solenoid proportional control valve (44) is present, the peak value or pulse width of the pulse voltage is temporarily increased to instantaneously boost the driving force of the solenoid (44E), thereby ensuring smooth operation of a piston (44C) and stabilizing the flow rate control.
    Type: Grant
    Filed: October 29, 2002
    Date of Patent: June 17, 2008
    Assignee: Bosch Automotive Systems Corporation
    Inventors: Kazuya Kubota, Tetsuya Kuwayama, Norio Matsuda
  • Method and apparatus for driving flow control electromagnetic proportional control valve
    Publication number: 20050151103
    Abstract: In a method for driving a solenoid proportional control valve (44) used for flow rate control of a common rail system pump adapted to regulate flow rate by regulating the duty ratio of a pulse voltage applied to a solenoid coil (F) of a solenoid (44E), when an operating condition liable to cause hysteresis in the operation of the solenoid proportional control valve (44) is present, the peak value or pulse width of the pulse voltage is temporarily increased to instantaneously boost the driving force of the solenoid (44E), thereby ensuring smooth operation of a piston (44C) and stabilizing the flow rate control.
    Type: Application
    Filed: October 29, 2002
    Publication date: July 14, 2005
    Inventors: Kazuya Kubota, Tetsuya Kuwayama, Norio Matsuda