Patents by Inventor Sung Hui HAN

Sung Hui HAN 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).

  • Startability improving method for GDI engine using electric CVVT control
    Patent number: 8897989
    Abstract: A method for improving startability of a of a gasoline direct injection (GDI) engine by controlling an electric continuously variable valve timing (CVVT) may include determining whether the engine is running, calculating the phase angle of the camshaft and the difference between the position of the camshaft and the optimum position of the lobe of the high pressure pump, applying a duty to the drive motor to rotate the camshaft, calculating the difference between the current position of the camshaft after rotation and the target position of the camshaft, and comparing the difference with a predetermined value. When the difference is not smaller than a predetermined value, the duty is raised and applied to the drive motor to rotate the camshaft further until the difference is reduced and smaller than the predetermined value.
    Type: Grant
    Filed: July 22, 2011
    Date of Patent: November 25, 2014
    Assignee: Hyundai Motor Company
    Inventor: Sung Hui Han
  • STARTABILITY IMPROVING METHOD FOR GDI ENGINE USING ELECTRIC CVVT CONTROL
    Publication number: 20120143463
    Abstract: A method for improving startability of a of a gasoline direct injection (GDI) engine by controlling an electric continuously variable valve timing (CVVT) may include determining whether the engine is running, calculating the phase angle of the camshaft and the difference between the position of the camshaft and the optimum position of the lobe of the high pressure pump, applying a duty to the drive motor to rotate the camshaft, calculating the difference between the current position of the camshaft after rotation and the target position of the camshaft, and comparing the difference with a predetermined value. When the difference is not smaller than a predetermined value, the duty is raised and applied to the drive motor to rotate the camshaft further until the difference is reduced and smaller than the predetermined value.
    Type: Application
    Filed: July 22, 2011
    Publication date: June 7, 2012
    Applicant: Hyundai Motor Company
    Inventor: Sung Hui HAN