Patents by Inventor Woo-Jik Lee

Woo-Jik Lee 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).

  • Engine start control system and a method thereof
    Patent number: 7040296
    Abstract: An engine start control system provides at least one sensor detecting engine operating conditions, an injector, and a control unit. The control unit controls the injector based on signals of the at least one sensor and it is programmed to perform a control logic comprising, determining whether an accumulated number of cases in which engine start is determined to be delayed is greater than a predetermined reference value and controlling the injector to not inject fuel for a predetermined number of engine cycles.
    Type: Grant
    Filed: December 29, 2003
    Date of Patent: May 9, 2006
    Assignee: Hyundai Motor Company
    Inventor: Woo Jik Lee
  • Apparatus and method for start-delay warning of an LPI engine
    Patent number: 6986334
    Abstract: A method and apparatus for start delay warning in a liquefied petroleum gas injection engine is disclosed. During a period required for forming a sufficient fuel pressure in a fuel supply line, a warning signal is generated such that a driver is directed to maintain an ignition switch at its second (simply IG on) stage.
    Type: Grant
    Filed: November 10, 2003
    Date of Patent: January 17, 2006
    Assignee: Hyundai Motor Company
    Inventor: Woo Jik Lee
  • Starting method of an LPI engine in partial cool-down state
    Patent number: 6932060
    Abstract: A starting method of an LPI engine in a partial cool-down state wherein an engine is allowed to start with ample fuel pressure obtained in a fuel line when an LPI engine is in a partial cool-down state, thereby enabling the engine to start smoothly, and a fuel pump is driven at a maximum speed for a prescribed period of time within the scope of not generating noise even after starting of the engine has been performed, thereby enabling a stable engine operation.
    Type: Grant
    Filed: December 30, 2003
    Date of Patent: August 23, 2005
    Assignee: Hyundai Motor Company
    Inventor: Woo-Jik Lee
  • Starting method of an LPI engine in partial cool-down state
    Publication number: 20050087176
    Abstract: A starting method of an LPI engine in a partial cool-down state wherein an engine is allowed to start with ample fuel pressure obtained in a fuel line when an LPI engine is in a partial cool-down state, thereby enabling the engine to start smoothly, and a fuel pump is driven at a maximum speed for a prescribed period of time within the scope of not generating noise even after starting of the engine has been performed, thereby enabling a stable engine operation.
    Type: Application
    Filed: December 30, 2003
    Publication date: April 28, 2005
    Inventor: Woo-Jik Lee
  • Engine start control system and a method thereof
    Publication number: 20040244779
    Abstract: An engine start control system provides at least one sensor detecting engine operating conditions, an injector, and a control unit. The control unit controls the injector based on signals of the at least one sensor and it is programmed to perform a control logic comprising, determining whether an accumulated number of cases in which engine start is determined to be delayed is greater than a predetermined reference value and controlling the injector to not inject fuel for a predetermined number of engine cycles.
    Type: Application
    Filed: December 29, 2003
    Publication date: December 9, 2004
    Inventor: Woo Jik Lee
  • LPG fuel composition estimation method and system
    Patent number: 6766269
    Abstract: A Liquefied Petroleum Gas (LPG) fuel composition estimation method is provided that determines an LPG fuel composition from saturation vapor pressure data and an estimated fuel temperature and fuel pressure inside the fuel tank. A Liquefied Petroleum Gas Injection (LPI) System that employs the method is provided that employs the method of the invention.
    Type: Grant
    Filed: December 30, 2002
    Date of Patent: July 20, 2004
    Assignee: Hyundai Motor Company
    Inventor: Woo-Jik Lee
  • Apparatus and method for start-delay warning of an LPI engine
    Publication number: 20040099249
    Abstract: A method and apparatus for start delay warning in a liquefied petroleum gas injection engine is disclosed. During a period required for forming a sufficient fuel pressure in a fuel supply line, a warning signal is generated such that a driver is directed to maintain an ignition switch at its second (simply IG on) stage.
    Type: Application
    Filed: November 10, 2003
    Publication date: May 27, 2004
    Inventor: Woo Jik Lee
  • LPG fuel composition estimation method and system
    Publication number: 20030216883
    Abstract: A Liquefied Petroleum Gas (LPG) fuel composition estimation method is provided that determines an LPG fuel composition from saturation vapor pressure data and an estimated fuel temperature and fuel pressure inside the fuel tank. A Liquefied Petroleum Gas Injection (LPI) System that employs the method is provided that employs the method of the invention.
    Type: Application
    Filed: December 30, 2002
    Publication date: November 20, 2003
    Inventor: Woo-Jik Lee