Patents by Inventor Hatsuo Okada

Hatsuo Okada 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 pressure reducing valve to reduce fuel pressure in a common rail
    Patent number: 7848868
    Abstract: It is a objective of the present invention to provide a control apparatus which is capable of compensating a delay time for opening a pressure reducing valve since an electronic control unit sends a command signal for driving the pressure reducing valve so as to discharge high pressure fuel in a fuel accumulating device of a fuel injection system for the internal combustion engine. The delay time control apparatus for opening a pressure reducing valve has a potential for avoiding an overshoot phenomenon in which an actual pressure of fuel accumulated in the fuel accumulating device overshoots a target value of fuel pressure during the increase the fuel pressure of the fuel accumulating device.
    Type: Grant
    Filed: September 5, 2007
    Date of Patent: December 7, 2010
    Assignee: Denso Corporation
    Inventors: Hironari Nakagawa, Shigeki Hidaka, Kensuke Tanaka, Hatsuo Okada
  • Method and apparatus for pressure reducing valve to reduce fuel pressure in a common rail
    Publication number: 20080059039
    Abstract: It is a objective of the present invention to provide a control apparatus which is capable of compensating a delay time for opening a pressure reducing valve since an electronic control unit sends a command signal for driving the pressure reducing valve so as to discharge high pressure fuel in a fuel accumulating device of a fuel injection system for the internal combustion engine. The delay time control apparatus for opening a pressure reducing valve has a potential for avoiding an overshoot phenomenon in which an actual pressure of fuel accumulated in the fuel accumulating device overshoots a target value of fuel pressure during the increase the fuel pressure of the fuel accumulating device.
    Type: Application
    Filed: September 5, 2007
    Publication date: March 6, 2008
    Applicant: DENSO CORPORATION
    Inventors: Hironari Nakagawa, Shigeki Hidaka, Kensuke Tanaka, Hatsuo Okada