Patents by Inventor Ji-Hyun Shim

Ji-Hyun Shim 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: 10211471
    Abstract: A method of controlling purging in a hydrogen storage system includes determining the internal hydrogen purity of a hydrogen tank and adjusting a hydrogen purging cycle of the hydrogen tank depending on the determined internal hydrogen purity. An apparatus for controlling purging in a hydrogen storage system is also provided.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: February 19, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Ji Hyun Shim, Hyung Ki Kim, Sang Hyun Kim, Chang Ho Kim
  • Patent number: 10112486
    Abstract: A device for detecting leakage of gas of a fuel cell vehicle includes a gas sensor configured to determine whether gas leaks based on a change in a temperature by a catalyst reaction and a vehicle control unit including a comparator configured to read a variation in temperature from the gas sensor, and configured to control a fuel cell vehicle. A power application state is maintained in the comparator in a power off state of the fuel cell vehicle. Power of the gas sensor is switched at regular periodic intervals. The comparator determines the variation in temperature measured by the gas sensor, and, when the variation in temperature exceeds a predetermined value, the power of the gas sensor is switched to normal power.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: October 30, 2018
    Assignee: Hyundai Motor Company
    Inventors: Hyeon Seok Ban, Ho June Bae, Ji Hyun Shim
  • Publication number: 20180205101
    Abstract: a fuel cell system without a high pressure line of a hydrogen supplying system, including a gas charging line formed between a gas charging station and a high pressure vessel charged with gas by the gas charging station, and a gas supplying line formed between the high pressure vessel and a stack, includes: a regulator provided in the gas supplying line; a solenoid valve provided in the gas supplying line between the regulator and the high pressure vessel; and a check valve provided in a bypass line connecting one point of the gas supplying line between the regulator and the solenoid valve and one point of the gas charging line.
    Type: Application
    Filed: November 22, 2017
    Publication date: July 19, 2018
    Inventors: Chang Ho KIM, Ji Hyun SHIM
  • Publication number: 20180175410
    Abstract: A system for measuring pressure of an in-tank regulator includes a direct-pipe flow path which directly communicates with an inside of a high-pressure container, a high-pressure sensor, of which a portion is movable into the direct-pipe flow path, fastened to and separated from the direct-pipe flow path, and a shut-off valve disposed on the direct-pipe flow path between the high-pressure container and the high-pressure sensor, wherein when the high-pressure sensor is separated from the direct-pipe flow path, the direct-pie flow path is sealed by the shut-off valve.
    Type: Application
    Filed: September 20, 2017
    Publication date: June 21, 2018
    Inventors: Chang Ho KIM, Jang Ho CHOI, Hyung Ki KIM, Ji Hyun SHIM
  • Publication number: 20180135086
    Abstract: The present disclosure relates to a protein having the activity of exporting O-acetylhomoserine and a novel modified protein thereof, a microorganism capable of producing O-acetylhomoserine with enhanced expression of the protein, and a method for producing O-acetylhomoserine using the microorganism.
    Type: Application
    Filed: June 3, 2016
    Publication date: May 17, 2018
    Inventors: Jee Yeon BAE, Ji Hyun SHIM, Hyun Ah KIM, Juhee SEO, Yong Uk SHIN, Jae Hee LEE, Sang Kyoum KIM, So Young KIM
  • Patent number: 9959724
    Abstract: An apparatus and a method of indicating safety of a hydrogen tank when a vehicle fire occurs are provided. The apparatus includes a hydrogen storing tank and a thermal pressure relief device (TPRD) mounted within a valve of the hydrogen storing tank. In addition, a controller is configured to detect a flow rate of hydrogen discharged from the hydrogen storing tank, using a sensor to determine whether the detected flow rate of discharged hydrogen is within a predetermined reference flow rate range. The controller is also configured to transmit a warning signal when the detected flow rate of discharged hydrogen is included within the predetermined reference flow rate range.
    Type: Grant
    Filed: December 14, 2014
    Date of Patent: May 1, 2018
    Assignee: Hyundai Motor Company
    Inventors: Chang Ho Kim, Sang Hyun Kim, Ji Hyun Shim
  • Publication number: 20180079309
    Abstract: A device for detecting leakage of gas of a fuel cell vehicle includes a gas sensor configured to determine whether gas leaks based on a change in a temperature by a catalyst reaction and a vehicle control unit including a comparator configured to read a variation in temperature from the gas sensor, and configured to control a fuel cell vehicle. A power application state is maintained in the comparator in a power off state of the fuel cell vehicle. Power of the gas sensor is switched at regular periodic intervals. The comparator determines the variation in temperature measured by the gas sensor, and, when the variation in temperature exceeds a predetermined value, the power of the gas sensor is switched to normal power.
    Type: Application
    Filed: December 15, 2016
    Publication date: March 22, 2018
    Applicant: HYUNDAI MOTOR COMPANY
    Inventors: Hyeon Seok Ban, Ho June Bae, Ji Hyun Shim
  • Publication number: 20180034085
    Abstract: A method of eliminating leakage from a fuel tank valve includes when the leakage occurs, consuming fuel stored in a passage between a fuel tank and a stack in a state in which a tank valve is closed.
    Type: Application
    Filed: December 16, 2016
    Publication date: February 1, 2018
    Inventors: Ji Hyun SHIM, Chang Ho KIM
  • Publication number: 20180033274
    Abstract: An apparatus and a method of indicating safety of a hydrogen tank when a vehicle fire occurs are provided. The apparatus includes a hydrogen storing tank and a thermal pressure relief device (TPRD) mounted within a valve of the hydrogen storing tank. In addition, a controller is configured to detect a flow rate of hydrogen discharged from the hydrogen storing tank, using a sensor to determine whether the detected flow rate of discharged hydrogen is within a predetermined reference flow rate range. The controller is also configured to transmit a warning signal when the detected flow rate of discharged hydrogen is included within the predetermined reference flow rate range.
    Type: Application
    Filed: October 10, 2017
    Publication date: February 1, 2018
    Inventors: Chang Ho Kim, Sang Hyun Kim, Ji Hyun Shim
  • Patent number: 9845014
    Abstract: A system control method is provided for measuring a distance between a smart key and a vehicle. When the distance between the smart key and the vehicle is changed based on a predetermined distance whether a hydrogen leak occurs is detected by a hydrogen sensor detection controller. A driver is then informed of a hydrogen leak via a display on a cluster, a turn-on of an emergency light, and a warning sound of the vehicle. Alternatively, a starting-impossible state of the vehicle or shutting-down starting of the vehicle is maintained to ensure safety measures based on the concentration of the leaking hydrogen.
    Type: Grant
    Filed: November 7, 2015
    Date of Patent: December 19, 2017
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Sang Hyun Kim, Ji Hyun Shim, Ki Ho Hwang, Hyung Ki Kim
  • Publication number: 20170301931
    Abstract: A hydrogen consumption measuring method for a fuel cell system includes steps of: calculating an amount of hydrogen consumed for a representative section from a first pressure at a time when hydrogen is supplied into an anode and a second pressure at a time when the hydrogen is no longer supplied to the anode; and calculating a total amount of hydrogen consumed by accumulating amounts of hydrogen consumed from a plurality of sections.
    Type: Application
    Filed: September 27, 2016
    Publication date: October 19, 2017
    Inventors: Se Kwon JUNG, Ho June BAE, Ji Hyun SHIM, Hyung Ki KIM
  • Patent number: 9789775
    Abstract: A method is provided for notifying a driver that charging is required determined by utilizing the calculated remaining travel distance of the vehicle, the position information of the charging station and the position information about the destination. In particular, the method determines when the total travel distance in consideration of the destination exceeds the remaining travel distance of the vehicle. The driver is notified of the necessity for charging during the initial traveling, and before traveling beyond the rechargeable returning distance.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: October 17, 2017
    Assignee: Hyundai Motor Company
    Inventors: Sang Hyun Kim, Chang Ho Kim, Ji Hyun Shim, Hyung Ki Kim
  • Patent number: 9766194
    Abstract: A method for managing a temperature anomaly in a hydrogen tank includes a temperature checking step for defining temperature values detected by temperature, a temperature comparing step for comparing the temperature values with each other and then checking whether there is a specific temperature difference among the temperature values, a temperature sensor judging step for judging the temperature sensor in which the specific temperature difference is generated as an abnormal temperature sensor, and judging the temperature sensor in which the specific temperature difference is not generated as a normal temperature sensor, and an abnormal temperature sensor managing step for applying the temperature value of the temperature sensor judged as the normal temperature sensor when the hydrogen tank in which the temperature sensor judged as the abnormal temperature sensor is provided is filled or amount of fuel in the hydrogen tank is calculated.
    Type: Grant
    Filed: April 18, 2014
    Date of Patent: September 19, 2017
    Assignee: Hyundai Motor Company
    Inventors: Hyung-Ki Kim, Chang-Ho Kim, Ji-Hyun Shim
  • Publication number: 20170054167
    Abstract: A device and method for improving stack performance of a fuel cell system are provided. The device includes a fuel cell controller that operates a stack of a normal-pressure fuel cell system. When the fuel cell controller determines that an operating state of the stack is normal and a current intake air pressure is decreased as a result of monitoring the current intake air pressure, a current output, and an exterior air temperature of the stack, the fuel cell controller increases the amount of air to be supplied into the stack by adjusting a range of a theoretical air ratio which is a theoretical ratio of an air amount to a coolant temperature in the stack.
    Type: Application
    Filed: July 1, 2016
    Publication date: February 23, 2017
    Inventors: Hyo Jin Park, Sang Soo Eun, Ji Hyun Shim, Dae Jong Kim
  • Publication number: 20160201851
    Abstract: A receptacle for charging hydrogen is provided. The receptacle includes a main body formed at one side of a vehicle. A filter unit disposed within the main body filters the foreign substance in the hydrogen gas passing through the main body and a check unit disposed at the rear end of the filter unit controls a flow in one direction. The filter unit includes a mesh filter inserted into the filter socket formed at a first body of the main body and formed in a shape to filter the hydrogen gas passing through the main body, and a filter supporter disposed at the rear side of the mesh filter to closely support the mesh filter by coupling the second body and the first body and of which a plurality of gas apertures are formed to cause hydrogen gas passing through the mesh filter to flow to the check unit side.
    Type: Application
    Filed: November 9, 2015
    Publication date: July 14, 2016
    Inventors: Sang Hyun Kim, Ji Hyun Shim, Ki Ho Hwang
  • Publication number: 20160171797
    Abstract: A system control method is provided for measuring a distance between a smart key and a vehicle. When the distance between the smart key and the vehicle is changed based on a predetermined distance whether a hydrogen leak occurs is detected by a hydrogen sensor detection controller. A driver is then informed of a hydrogen leak via a display on a cluster, a turn-on of an emergency light, and a warning sound of the vehicle. Alternatively, a starting-impossible state of the vehicle or shutting-down starting of the vehicle is maintained to ensure safety measures based on the concentration of the leaking hydrogen.
    Type: Application
    Filed: November 7, 2015
    Publication date: June 16, 2016
    Inventors: Sang Hyun Kim, Ji Hyun Shim, Ki Ho Hwang, Hyung Ki Kim
  • Publication number: 20160141666
    Abstract: A system for controlling low-temperature starting of a fuel cell vehicle includes a high-pressure hydrogen flow control valve controlling a flow of hydrogen supplied to a fuel cell stack. A fuel cell controller is configured to change and control an opening rate of the high-pressure hydrogen flow control valve when an internal temperature of the fuel cell stack is a reference value or less. When the opening rate of the high-pressure hydrogen flow control valve decreases, a pressure of the hydrogen passing through the high-pressure hydrogen flow control valve decreases to increase a temperature of the hydrogen which is supplied to the fuel stack.
    Type: Application
    Filed: September 24, 2015
    Publication date: May 19, 2016
    Inventors: Ji Hyun SHIM, Chang Ho KIM, Sang Hyun KIM
  • Publication number: 20160137077
    Abstract: A method is provided for notifying a driver that charging is required determined by utilizing the calculated remaining travel distance of the vehicle, the position information of the charging station and the position information about the destination. In particular, the method determines when the total travel distance in consideration of the destination exceeds the remaining travel distance of the vehicle. The driver is notified of the necessity for charging during the initial traveling, and before traveling beyond the rechargeable returning distance.
    Type: Application
    Filed: September 28, 2015
    Publication date: May 19, 2016
    Applicant: HYUNDAI MOTOR COMPANY
    Inventors: Sang Hyun Kim, Chang Ho Kim, Ji Hyun Shim, Hyung Ki Kim
  • Publication number: 20150379844
    Abstract: An apparatus and a method of indicating safety of a hydrogen tank when a vehicle fire occurs are provided. The apparatus includes a hydrogen storing tank and a thermal pressure relief device (TPRD) mounted within a valve of the hydrogen storing tank. In addition, a controller is configured to detect a flow rate of hydrogen discharged from the hydrogen storing tank, using a sensor to determine whether the detected flow rate of discharged hydrogen is within a predetermined reference flow rate range. The controller is also configured to transmit a warning signal when the detected flow rate of discharged hydrogen is included within the predetermined reference flow rate range.
    Type: Application
    Filed: December 14, 2014
    Publication date: December 31, 2015
    Inventors: Chang Ho Kim, Sang Hyun Kim, Ji Hyun Shim
  • Publication number: 20150188165
    Abstract: A method of controlling purging in a hydrogen storage system includes determining the internal hydrogen purity of a hydrogen tank and adjusting a hydrogen purging cycle of the hydrogen tank depending on the determined internal hydrogen purity. An apparatus for controlling purging in a hydrogen storage system is also provided.
    Type: Application
    Filed: December 22, 2014
    Publication date: July 2, 2015
    Inventors: Ji Hyun SHIM, Hyung Ki KIM, Sang Hyun KIM, Chang Ho KIM