Patents by Inventor Won Sik LIM

Won Sik LIM 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 calculating degradation degree of a damper clutch of an automatic transmission of a vehicle
    Patent number: 11773965
    Abstract: A method for calculating a degradation degree of a damper clutch of an automatic transmission of a vehicle includes: filtering, by a controller, a vibration signal of the vehicle according to driving of the vehicle in order to remove a vibration signal of the vehicle corresponding to a natural frequency of an engine of the vehicle from the vibration signal of the vehicle according to the driving of the vehicle; converting, by the controller, the filtered vibration signal into a signal including a sinusoidal wave having a natural frequency of the automatic transmission based on a gear stage of the automatic transmission of the vehicle by using a frequency analysis method; and calculating, by the controller, a degradation degree of the damper clutch included in a torque converter of the automatic transmission based on a magnitude of the sinusoidal wave having the natural frequency of the automatic transmission.
    Type: Grant
    Filed: November 10, 2022
    Date of Patent: October 3, 2023
    Assignees: HYUNDAI MOTOR COMPANY, KIA CORPORATION, Seoul National University of Science & Technology, Foundation for Research & Business
    Inventors: Ji hoon Kim, Won Sik Lim, Jae Hyeon Park
  • Hydraulic pressure instruction-learning apparatus for hybrid vehicle and method using the same
    Patent number: 9283957
    Abstract: A hydraulic pressure instruction-learning apparatus of a hybrid vehicle includes a power source including an engine and a motor. The engine clutch is disposed between the engine and the motor. The vehicle controller is configured to output a hydraulic pressure instruction to control engagement/disengagement of the engine clutch. The vehicle controller compares output performance of the engine clutch with predetermined dynamic target performance in a launch control, extracts a performance error function if a difference therebetween exceeds a predetermined allowable error range, and corrects the output performance of the engine clutch, such that the output performance falls within the predetermined allowable error range and is stored as a learned value.
    Type: Grant
    Filed: November 24, 2014
    Date of Patent: March 15, 2016
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION, SNU R&DB FOUNDATION
    Inventors: Seongwook Moon, Daero Park, Seok Min Jeong, Jae Ho Lee, Jung Un An, Hee Yun Lee, Won Sik Lim, Nam Woong Kim, Kyo Bum Lee, Howon Seo, Suk-Won Cha
  • HYDRAULIC PRESSURE INSTRUCTION-LEARNING APPARATUS FOR HYBRID VEHICLE AND METHOD USING THE SAME
    Publication number: 20150266468
    Abstract: A hydraulic pressure instruction-learning apparatus of a hybrid vehicle includes a power source including an engine and a motor. The engine clutch is disposed between the engine and the motor. The vehicle controller is configured to output a hydraulic pressure instruction to control engagement/disengagement of the engine clutch. The vehicle controller compares output performance of the engine clutch with predetermined dynamic target performance in a launch control, extracts a performance error function if a difference therebetween exceeds a predetermined allowable error range, and corrects the output performance of the engine clutch, such that the output performance falls within the predetermined allowable error range and is stored as a learned value.
    Type: Application
    Filed: November 24, 2014
    Publication date: September 24, 2015
    Inventors: Seongwook MOON, Daero PARK, Seok Min JEONG, Jae Ho LEE, Jung Un AN, Hee Yun LEE, Won Sik LIM, Nam Woong KIM, Kyo Bum LEE, Howon SEO, Suk-Won CHA