Patents by Inventor Seong Hack Lee

Seong Hack 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).

  • Patent number: 11472475
    Abstract: A control apparatus and method of a motor-driven power steering system are provided. The apparatus and method are capable of suppressing catch-up that occurs at a high steering speed even without using an expensive motor, thereby contributing to improving commercial value and reducing the manufacturing cost of a vehicle. The method includes determining a target steering speed using driver-steering input information and vehicle state information and determining the target steering speed corresponds to a condition for avoiding catch-up using the determined target steering speed. A current compensation value is then determined for reducing catch-up using the target steering speed in response to determining that is the target steering speed corresponds a condition for avoiding catch-up and motor current is compensated with the current compensation value.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: October 18, 2022
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Seong Hack Lee, Sang Woock Ryu
  • Publication number: 20190176878
    Abstract: A control apparatus and method of a motor-driven power steering system are provided. The apparatus and method are capable of suppressing catch-up that occurs at a high steering speed even without using an expensive motor, thereby contributing to improving commercial value and reducing the manufacturing cost of a vehicle. The method includes determining a target steering speed using driver-steering input information and vehicle state information and determining the target steering speed corresponds to a condition for avoiding catch-up using the determined target steering speed. A current compensation value is then determined for reducing catch-up using the target steering speed in response to determining that is the target steering speed corresponds a condition for avoiding catch-up and motor current is compensated with the current compensation value.
    Type: Application
    Filed: November 5, 2018
    Publication date: June 13, 2019
    Inventors: Seong Hack Lee, Sang Woock Ryu
  • Publication number: 20150102543
    Abstract: A hydraulic bushing of a lower arm for a vehicle includes an inner pipe, an outer pipe, an elastic member disposed between the inner and outer pipes and connecting the inner pipe to the outer pipe, and a fluid chamber defined in the elastic member. Fluid is sealed inside the fluid chamber. A stopper protrudes radially from an outer circumference of the inner pipe toward the outer pipe. The elastic member is coupled to the stopper such that the elastic member surrounds the stopper.
    Type: Application
    Filed: December 17, 2013
    Publication date: April 16, 2015
    Applicants: Hyundai Motor Company, HYUNDAI MOBIS CO., LTD., DAEHEUNG R&T CO., LTD., Kia Motors Corp.
    Inventors: Ha Kyung Moon, Jae Hun Kim, Se Il Kim, Seong Hack Lee, Jong Sung Park, Sung Wook Park
  • Publication number: 20080135111
    Abstract: To prevent explosion of an air tank in a vehicle collision, an apparatus includes a case defining a passage, configured for air stored in the air tank to be exhausted therethrough, the case being mounted to the air tank; a stopper movably disposed in the case and configured to selectively intercept the air based on a position thereof; an elastic member supporting the stopper; and at least one hook configured to secure the stopper in a position at which the air is exhausted.
    Type: Application
    Filed: December 28, 2006
    Publication date: June 12, 2008
    Inventor: Seong Hack Lee
  • Patent number: 6354654
    Abstract: Reinforcement (30) for reinforcing a vehicle frame structure (10), having a triangular shape in cross section, including one section (20) in parallel to a side frame member (11), and the other section (21) being attached to a lower section of the side frame member (11). The present invention prevents interference with pipes passing in a lateral direction of the vehicle frame (10) and the exhaust system components. Further, the reinforcement (30) of the invention has a large section modulus, thereby effectively reinforcing the vehicle frame (10).
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: March 12, 2002
    Assignee: Kia Motors Corporation
    Inventor: Seong Hack Lee
  • Publication number: 20010004160
    Abstract: Reinforcement (30) for reinforcing a vehicle frame structure (10), having a triangular shape in cross section, including one section (20) in parallel to a side frame member (11), and the other section (21) being attached to a lower section of the side frame member (11). The present invention prevents interference with pipes passing in a lateral direction of the vehicle frame (10) and the exhaust system components. Further, the reinforcement (30) of the invention has a large section modulus, thereby effectively reinforcing the vehicle frame (10).
    Type: Application
    Filed: November 30, 2000
    Publication date: June 21, 2001
    Inventor: Seong Hack Lee