Patents by Inventor Seung Hi Lee

Seung Hi 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).

  • Motor driven power steering system and control method thereof
    Patent number: 11608107
    Abstract: A motor driven power steering system includes: a power source for generating a steering assistance force assisting the steering of a vehicle; a transfer gear positioned between a power source and a column for transferring the steering assistance force generated by the power source to the column; a parameter estimation unit for estimating a friction parameter of a dynamic friction model based on the actual friction torque actually generated in the transfer gear; and a state estimation unit for calculating a state variable of the dynamic friction model based on a contact surface moving speed of the transfer gear and for estimating expected friction torque according to the dynamic friction model by using the calculated state variable and the friction parameter of the dynamic friction model estimated by the parameter estimation unit.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: March 21, 2023
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION, IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)
    Inventors: Kyu Won Kim, Chung Choo Chung, Yong Woo Jeong, Seung Hi Lee
  • ROAD SURFACE RECOGNITION APPARATUS, VEHICLE HAVING THE SAME, AND METHOD OF CONTROLLING VEHICLE
    Publication number: 20220080952
    Abstract: A vehicle having a road surface recognition apparatus, may perform obtaining, by a controller, sound data for a sound detected by a sound detector while driving; obtaining, by the controller, driving data for driving information detected by a driving information detector; recognizing, by the controller, a type of road surface based on the obtained sound data and the obtained driving data; and controlling, by the controller, a traction control system based on information related to the recognized type of the road surface.
    Type: Application
    Filed: July 27, 2021
    Publication date: March 17, 2022
    Inventors: Ik Jin Um, Jun Han Kang, Jungho Park, Man Dong Kim, Chung Choo Chung, Seung-Hi Lee, Dae Jung Kim, Jin Sung Kim
  • MOTOR DRIVEN POWER STEERING SYSTEM AND CONTROL METHOD THEREOF
    Publication number: 20210122412
    Abstract: A motor driven power steering system includes: a power source for generating a steering assistance force assisting the steering of a vehicle; a transfer gear positioned between a power source and a column for transferring the steering assistance force generated by the power source to the column; a parameter estimation unit for estimating a friction parameter of a dynamic friction model based on the actual friction torque actually generated in the transfer gear; and a state estimation unit for calculating a state variable of the dynamic friction model based on a contact surface moving speed of the transfer gear and for estimating expected friction torque according to the dynamic friction model by using the calculated state variable and the friction parameter of the dynamic friction model estimated by the parameter estimation unit.
    Type: Application
    Filed: February 28, 2020
    Publication date: April 29, 2021
    Applicants: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION, IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)
    Inventors: Kyu Won Kim, Chung Choo Chung, Yong Woo Jeong, Seung Hi Lee