Patents by Inventor Jee Sang LEE

Jee Sang 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).

  • Publication number: 20230134290
    Abstract: A method for controlling a hydraulic brake apparatus for a vehicle is disclosed. The method includes: a target valve group closing process in which a control unit controls a brake device to close a target brake group selectively including the plurality of valves; a hydraulic pressure supply process in which the control unit controls the brake device to supply hydraulic pressure to at least one of channels separated by closing the target valve group; and a contaminant removal process in which the control unit controls the brake device such that the target valve group opens and the fluid washes the target valve group.
    Type: Application
    Filed: September 2, 2022
    Publication date: May 4, 2023
    Applicant: HYUNDAI MOBIS CO., LTD.
    Inventors: Yong Cheol SEOL, Jee Sang LEE, Jae Won SEO, Jin Ho SEONG, Hwan Gon KIM
  • Patent number: 11597368
    Abstract: An apparatus for controlling an ESC-integrated regenerative braking system that includes a pedal cylinder unit connected to a reservoir unit to generate a hydraulic pressure by pressing a brake pedal, a motor driven by an electrical signal output in response to a displacement of the brake pedal, a master cylinder unit connected to the pedal cylinder unit to form a hydraulic pressure for braking through a master piston moving by the driving of the motor, a control unit configured to detect a leakage of oil, based on a change in pressure in a hydraulic passage, during single-stage control, two-stage control, single-stage single-acting control, or two-stage single-acting control of the master cylinder unit, and a hydraulic control valve provided in a hydraulic passage for connecting the reservoir unit to a wheel cylinder to brake each wheel, to be opened and closed under control of the control unit.
    Type: Grant
    Filed: April 28, 2020
    Date of Patent: March 7, 2023
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventors: Yong Cheol Seol, Jee Sang Lee, Wan Kyo Jung
  • Patent number: 11535218
    Abstract: A braking apparatus of a vehicle including: a brake pedal position detector configured to detect a position of a brake pedal; a piston displacement detector configured to detect a displacement of a piston installed in a main master cylinder; a rear wheel circuit pressure detector configured to detect pressure supplied to a rear wheel circuit; a front wheel circuit pressure detector configured to detect pressure supplied to a front wheel circuit; a motor driver configured to drive a motor to move the piston; and a controller configured to receive the position of the brake pedal, the displacement of the piston, rear wheel circuit pressure and front wheel circuit pressure, determine a fail of a circuit isolation valve, and perform fail safe driving by operating the motor driver and a normal operating valve to supply pressure to only one of the rear wheel circuit and the front wheel circuit.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: December 27, 2022
    Assignee: Hyundai Mobis Co., Ltd.
    Inventor: Jee Sang Lee
  • Publication number: 20220379864
    Abstract: According to at least one embodiment, the present disclosure provides an electronic braking system comprising: a main master cylinder including a main body, a main piston that is accommodated to be movable in the main body, a main chamber that is defined in the main body and connected with at least one wheel brake, a motor that generates a rotation force, and a power conversion unit that has one side connected with the motor and another side connected with the main piston, and converts a rotational motion of the motor into a straight motion, the main master cylinder being configured to generate hydraulic pressure by movement of the main piston; a motor position sensor disposed to sense a rotation distance of the motor; and a braking controller configured to perform control to move the main piston to a preset initial position by calculating displacement of the main piston based on the rotation distance of the motor and adjusting an amount of a current that is supplied to the motor.
    Type: Application
    Filed: May 24, 2022
    Publication date: December 1, 2022
    Applicant: HYUNDAI MOBIS Co., Ltd.
    Inventors: Yong Cheol SEOL, Jee Sang LEE, Tae Chun JEONG, Chang Hoe KOO
  • Patent number: 11230277
    Abstract: An air bleeding apparatus and method for electric brake systems. The air bleeding apparatus includes a piston position sensor configured to detect a position of a piston installed in a main master cylinder, a motor drive unit configured to drive a motor to move the piston, a motor speed detection unit configured to detect a speed of rotation of the motor, a brake pedal position sensor configured to detect a position of a brake pedal, and a control unit configured to, when entering an air bleeding mode, release a normally actuated valve and control the position of the piston by controlling the motor drive unit according to the position of the piston detected by the piston position sensor or the speed of rotation of the motor detected by the motor speed detection unit when it is determined that the brake pedal is pressed.
    Type: Grant
    Filed: January 2, 2020
    Date of Patent: January 25, 2022
    Assignee: Hyundai Mobis Co., Ltd.
    Inventor: Jee Sang Lee
  • Publication number: 20210053544
    Abstract: An apparatus for controlling an ESC-integrated regenerative braking system that includes a pedal cylinder unit connected to a reservoir unit to generate a hydraulic pressure by pressing a brake pedal, a motor driven by an electrical signal output in response to a displacement of the brake pedal, a master cylinder unit connected to the pedal cylinder unit to form a hydraulic pressure for braking through a master piston moving by the driving of the motor, a control unit configured to detect a leakage of oil, based on a change in pressure in a hydraulic passage, during single-stage control, two-stage control, single-stage single-acting control, or two-stage single-acting control of the master cylinder unit, and a hydraulic control valve provided in a hydraulic passage for connecting the reservoir unit to a wheel cylinder to brake each wheel, to be opened and closed under control of the control unit.
    Type: Application
    Filed: April 28, 2020
    Publication date: February 25, 2021
    Inventors: Yong Cheol SEOL, Jee Sang LEE, Wan Kyo JUNG
  • Publication number: 20200216048
    Abstract: A braking apparatus of a vehicle including: a brake pedal position detector configured to detect a position of a brake pedal; a piston displacement detector configured to detect a displacement of a piston installed in a main master cylinder; a rear wheel circuit pressure detector configured to detect pressure supplied to a rear wheel circuit; a front wheel circuit pressure detector configured to detect pressure supplied to a front wheel circuit; a motor driver configured to drive a motor to move the piston; and a controller configured to receive the position of the brake pedal, the displacement of the piston, rear wheel circuit pressure and front wheel circuit pressure, determine a fail of a circuit isolation valve, and perform fail safe driving by operating the motor driver and a normal operating valve to supply pressure to only one of the rear wheel circuit and the front wheel circuit.
    Type: Application
    Filed: December 31, 2019
    Publication date: July 9, 2020
    Inventor: Jee Sang LEE
  • Publication number: 20200216055
    Abstract: An air bleeding apparatus and method for electric brake systems. The air bleeding apparatus includes a piston position sensor configured to detect a position of a piston installed in a main master cylinder, a motor drive unit configured to drive a motor to move the piston, a motor speed detection unit configured to detect a speed of rotation of the motor, a brake pedal position sensor configured to detect a position of a brake pedal, and a control unit configured to, when entering an air bleeding mode, release a normally actuated valve and control the position of the piston by controlling the motor drive unit according to the position of the piston detected by the piston position sensor or the speed of rotation of the motor detected by the motor speed detection unit when it is determined that the brake pedal is pressed.
    Type: Application
    Filed: January 2, 2020
    Publication date: July 9, 2020
    Inventor: Jee Sang LEE
  • Publication number: 20160121867
    Abstract: A control method of an ESC (Electronic Stability Control) apparatus may include: sensing, by a control unit, whether one or more inlet valves (IVs) of a hydraulic modulation unit are opened, through a sensing unit during ABS (Anti-Lock Brake System) operation; and increasing an operating current of a motor by a preset reference value when the one or more IVs are opened.
    Type: Application
    Filed: October 29, 2015
    Publication date: May 5, 2016
    Inventors: Wan Kyo JUNG, Yong Cheol SEOL, Jee Sang LEE