Patents by Inventor Seong Pil Ryu

Seong Pil Ryu 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: 10403406
    Abstract: The present invention relates to a lower end fitting for reducing flow resistance due to an in-core instrument in a nuclear fuel assembly, that is, a lower end fitting (100) having a plurality of flow holes for a nuclear fuel assembly, in which the flow holes (121) are formed under an assembly groove in which an instrumentation tube (131) for a nuclear fuel assembly is inserted, and at least two or more flow holes (121) are formed at a predetermined distance from the central axis (C) of the instrumentation tube (131).
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: September 3, 2019
    Assignee: KEPCO NUCLEAR FUEL CO., LTD.
    Inventors: Jin Sun Kim, Jae Ik Kim, Sang Youn Jeon, Kyong Bo Eom, Dong Geun Ha, Seong Soo Kim, Joo Young Ryu, O Cheol Kwon, Su Pil Ryu, Hak In Lee, Joo Hong Chun, Ba Leum Kim
  • Patent number: 10026980
    Abstract: A method and system for maintaining stability of a system of a fuel cell vehicle are provided to prevent malfunction of sensors of a low voltage DC-DC converter and the respective controllers. A start timing of a fault diagnosis for the low voltage DC-DC converter and the respective controllers is determined and a deviation between voltages of the sensors of the low voltage DC-DC converter and the respective controllers is detected to determine whether the low voltage DC-DC converter and the respective controllers fail.
    Type: Grant
    Filed: December 3, 2015
    Date of Patent: July 17, 2018
    Assignee: Hyundai Motor Company
    Inventors: Seong Pil Ryu, Sung Suk Ok, Ji Tae Kim, Kyu Il Lee
  • Patent number: 10000141
    Abstract: A method and system for controlling a fuel cell vehicle are provided. The method includes determining, by a controller, a driving pattern of a driver based on driving information including acceleration and deceleration information. A condition for activation of an idling-stop of a fuel cell is then set based on the determined driving pattern and the fuel cell is stopped from generating electric energy when the condition for activation of the idling-stop is satisfied.
    Type: Grant
    Filed: April 11, 2016
    Date of Patent: June 19, 2018
    Assignee: Hyundai Motor Company
    Inventors: Kyu Il Lee, Seon Hak Kim, Seong Pil Ryu
  • Publication number: 20170080822
    Abstract: A method and system for controlling a fuel cell vehicle are provided. The method includes determining, by a controller, a driving pattern of a driver based on driving information including acceleration and deceleration information. A condition for activation of an idling-stop of a fuel cell is then set based on the determined driving pattern and the fuel cell is stopped from generating electric energy when the condition for activation of the idling-stop is satisfied.
    Type: Application
    Filed: April 11, 2016
    Publication date: March 23, 2017
    Inventors: Kyu Il Lee, Seon Hak Kim, Seong Pil Ryu
  • Publication number: 20160335815
    Abstract: A method and system for maintaining stability of a system of a fuel cell vehicle are provided to prevent malfunction of sensors of a low voltage DC-DC converter and the respective controllers. A start timing of a fault diagnosis for the low voltage DC-DC converter and the respective controllers is determined and a deviation between voltages of the sensors of the low voltage DC-DC converter and the respective controllers is detected to determine whether the low voltage DC-DC converter and the respective controllers fail.
    Type: Application
    Filed: December 3, 2015
    Publication date: November 17, 2016
    Inventors: Seong Pil Ryu, Sung Suk Ok, Ji Tae Kim, Kyun Ill Lee
  • Patent number: 9469197
    Abstract: An apparatus for compensating for torque of a fuel cell electric vehicle includes: a storage configured to store a first look-up table in which pedal amount correction coefficients corresponding to degradation rates of a fuel cell stack are recorded and a second look-up table in which torques corresponding to pedal amounts are recorded; a degradation rate calculator configured to calculate a degradation rate based on a maximum voltage and an output voltage of the fuel cell stack; a correction coefficient searcher configured to search for a correction coefficient corresponding to the calculated degradation rate using the first look-up table; a pedal amount detector configured to detect a pedal amount indicating a degree to which an acceleration pedal is pressed; and a torque compensator configured to compensate for torque by compensating for the detected pedal amount based on the searched correction coefficient using the second look-up table.
    Type: Grant
    Filed: May 1, 2015
    Date of Patent: October 18, 2016
    Assignee: Hyundai Motor Company
    Inventors: Seong Pil Ryu, Sung Suk Ok, Ji Tae Kim, Kyu Il Lee
  • Publication number: 20160156084
    Abstract: An apparatus for controlling a converter includes: a failure detector that detects failure of a sensor included in an input or output side of the converter, a substitution factor calculator that calculates a substitution factor based on a measurement value of a sensor in a high voltage battery connected to an input side of the converter when failure is detected in the sensor of the input side by the failure detector and calculates the substitution factor based on measurement values of a sensor connected to one or more loads when failure is detected in the sensor of the output side, and an emergency operation controller that controls an operation in a constant current or constant voltage scheme based on the calculated substitution factor.
    Type: Application
    Filed: September 3, 2015
    Publication date: June 2, 2016
    Inventors: Ji Tae Kim, Sung Suk Ok, Kyu Il Lee, Seong Pil Ryu
  • Publication number: 20160144719
    Abstract: An apparatus for compensating for torque of a fuel cell electric vehicle includes: a storage configured to store a first look-up table in which pedal amount correction coefficients corresponding to degradation rates of a fuel cell stack are recorded and a second look-up table in which torques corresponding to pedal amounts are recorded; a degradation rate calculator configured to calculate a degradation rate based on a maximum voltage and an output voltage of the fuel cell stack; a correction coefficient searcher configured to search for a correction coefficient corresponding to the calculated degradation rate using the first look-up table; a pedal amount detector configured to detect a pedal amount indicating a degree to which an acceleration pedal is pressed; and a torque compensator configured to compensate for torque by compensating for the detected pedal amount based on the searched correction coefficient using the second look-up table.
    Type: Application
    Filed: May 1, 2015
    Publication date: May 26, 2016
    Inventors: Seong Pil Ryu, Sung Suk Ok, Ji Tae Kim, Kyu Il Lee
  • Patent number: 9242573
    Abstract: A method for controlling an air supply of a fuel cell vehicle is provided. In particular, an air supply of a fuel cell vehicle is controlled by calculating an available power which is currently being used by a vehicle; calculating a motoring request power from a driving motor, based on the calculated available power and power required by the driving motor; calculating stack request power required in the fuel cell based on a required charging request power and the calculated motoring request power, depending on a state of charge (SOC) of a high voltage battery; and controlling the air supply to the fuel cell depending on the calculated stack request power.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: January 26, 2016
    Assignee: Hyundai Motor Company
    Inventors: Kyu Il Lee, Sung Gone Yoon, Jae Won Jung, Seong Pil Ryu
  • Publication number: 20150105952
    Abstract: A method for controlling an air supply of a fuel cell vehicle is provided. In particular, an air supply of a fuel cell vehicle is controlled by calculating an available power which is currently being used by a vehicle; calculating a motoring request power from a driving motor, based on the calculated available power and power required by the driving motor; calculating stack request power required in the fuel cell based on a required charging request power and the calculated motoring request power, depending on a state of charge (SOC) of a high voltage battery; and controlling the air supply to the fuel cell depending on the calculated stack request power.
    Type: Application
    Filed: December 6, 2013
    Publication date: April 16, 2015
    Applicant: HYUNDAI MOTOR COMPANY
    Inventors: Kyu II Lee, Sung Gone Yoon, Jae Won Jung, Seong Pil Ryu
  • Patent number: 8859158
    Abstract: The present invention provides a hybrid fuel cell system that is configured to determine if an idle stop condition has been satisfied during a normal operation mode of the hybrid fuel cell system, cut off air supply to a fuel cell to stop power generation of the fuel cell and reduce a voltage which the fuel cell outputs in response to determining that the idle stop condition has been satisfied. The voltage of a bidirectional converter, connected between a battery and a bus terminal is reduced and the output of the fuel cell is controlled, based on a first predetermined value and maintained at that first predetermined value. Subsequently, the battery is charged via the output current of the fuel cell generated by maintaining the reduced voltage of the bidirectional converter.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: October 14, 2014
    Assignee: Hyundai Motor Company
    Inventors: Sang Uk Kwon, Nam Woo Lee, Kyu Il Lee, Soon Il Jeon, Seong Pil Ryu, Jung Hwan Ryu
  • Patent number: 8828614
    Abstract: The present invention provides a fuel cell hybrid system having a multi-stack structure, which maintains the voltage of a fuel cell at a level lower than that of an electricity storage means (supercapacitor) during regenerative braking so that the fuel cell does not unnecessarily charge the electricity storage means, thereby increasing the amount of recovered energy and improving fuel efficiency.
    Type: Grant
    Filed: June 1, 2009
    Date of Patent: September 9, 2014
    Assignee: Hyundai Motor Corporation
    Inventors: Nam Woo Lee, Sang Uk Kwon, Seong Pil Ryu, Jae Won Jung, Sun Soon Park
  • Patent number: 8486571
    Abstract: The present invention provides a method for controlling output of a fuel cell to improve fuel efficiency of a fuel cell hybrid vehicle, in which the fuel cell is operated at a constant power at a maximum efficiency point, wherein the fuel cell and a storage means are directly connected if the output and energy of the storage means is insufficient, and the power generation of the fuel cell is stopped when the level of energy of the storage means is increased during stopping or during low power operation such that the fuel cell is intensively operated at the maximum efficiency point, thus improving the fuel efficiency of the fuel cell and the efficiency of the fuel cell system.
    Type: Grant
    Filed: December 15, 2008
    Date of Patent: July 16, 2013
    Assignee: Hyundai Motor Company
    Inventors: Seo Ho Choi, Nam Woo Lee, Soon Il Jeon, Sang Uk Kwon, Seong Pil Ryu, Sun Soon Park
  • Patent number: 8372560
    Abstract: The present invention provides a separator for a fuel cell, in which a water discharge hole such as a venturi tube or a water discharge means including a metal plate for condensing water is provided on a land of the separator being in contact with a gas diffusion layer (GDL) of a fuel cell so that water generated by a reaction is easily discharged from the GDL through the water discharge means.
    Type: Grant
    Filed: February 10, 2009
    Date of Patent: February 12, 2013
    Assignee: Hyundai Motor Company
    Inventors: Sun Soon Park, Seong Pil Ryu, Hee Seok Jeong, Sang Uk Kwon, Nam Woo Lee, Seo Ho Choi
  • Patent number: 8215428
    Abstract: The present invention provides a power configuration system for a fuel cell hybrid vehicle and a method for controlling the same, in which a second blocking diode is installed in a main bus terminal at an output terminal of a fuel cell (in front of a first blocking diode) separately from the existing first blocking diode installed in the main bus terminal, the positions of high voltage components for driving the fuel cell are changed from the rear of the first blocking diode to the front of the first blocking diode, and the operations of the high voltage components are appropriately controlled during regenerative braking such that the voltage of the fuel cell may be maintained below that of the supercapacitor.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: July 10, 2012
    Assignee: Hyundai Motor Company
    Inventors: Nam Woo Lee, Sang Uk Kwon, Seong Pil Ryu, Jae Won Jung, Sun Soon Park
  • Publication number: 20120141895
    Abstract: The present invention provides a hybrid fuel cell system that is configured to determine if an idle stop condition has been satisfied during a normal operation mode of the hybrid fuel cell system, cut off air supply to a fuel cell to stop power generation of the fuel cell and reduce a voltage which the fuel cell outputs in response to determining that the idle stop condition has been satisfied. The voltage of a bidirectional converter, connected between a battery and a bus terminal is reduced and the output of the fuel cell is controlled, based on a first predetermined value and maintained at that first predetermined value. Subsequently, the battery is charged via the output current of the fuel cell generated by maintaining the reduced voltage of the bidirectional converter.
    Type: Application
    Filed: July 18, 2011
    Publication date: June 7, 2012
    Applicant: HYUNDAI MOTOR COMPANY
    Inventors: Sang Uk Kwon, Nam Woo Lee, Kyu Il Lee, Soon Il Jeon, Seong Pil Ryu, Jung Hwan Ryu
  • Patent number: 8178253
    Abstract: The present invention provides a current collector of an end plate for a fuel cell and a method for controlling the same, in which a plurality of current collector plates having different resistance values is mounted on an end plate so that the current of a fuel cell is consumed during cold start and during low power operation to improve cold startability of the fuel cell and, further, the durability of a membrane electrode assembly (MEA) is improved due to an increase in voltage during low power operation.
    Type: Grant
    Filed: May 21, 2009
    Date of Patent: May 15, 2012
    Inventors: Seong Pil Ryu, Sun Soon Park, Nam Woo Lee, Sang Uk Kwon, Seo Ho Choi, Duck Whan Kim
  • Patent number: 8119297
    Abstract: The present invention provides an idle stop-start control method of a fuel cell hybrid vehicle including a fuel cell as a main power source and a storage means as an auxiliary power source, in which air and hydrogen supply is cut off during low power operation where the efficiency of the fuel cell is low and during regenerative braking such that residual oxygen and hydrogen are consumed to drop the voltage of a fuel cell stack, thus stopping the operation of the fuel cell.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: February 21, 2012
    Assignee: Hyundai Motor Company
    Inventors: Sang Uk Kwon, Seo Ho Choi, Nam Woo Lee, Seong Pil Ryu, Sun Soon Park
  • Publication number: 20100104894
    Abstract: The present invention provides a fuel cell hybrid system having a multi-stack structure, which maintains the voltage of a fuel cell at a level lower than that of an electricity storage means (supercapacitor) during regenerative braking so that the fuel cell does not unnecessarily charge the electricity storage means, thereby increasing the amount of recovered energy and improving fuel efficiency.
    Type: Application
    Filed: June 1, 2009
    Publication date: April 29, 2010
    Inventors: Nam Woo Lee, Sang Uk Kwon, Seong Pil Ryu, Jae Won Jung, Sun Soon Park
  • Publication number: 20100104921
    Abstract: The present invention provides a separator for a fuel cell, in which a water discharge hole such as a venturi tube or a water discharge means including a metal plate for condensing water is provided on a land of the separator being in contact with a gas diffusion layer (GDL) of a fuel cell so that water generated by a reaction is easily discharged from the GDL through the water discharge means.
    Type: Application
    Filed: February 10, 2009
    Publication date: April 29, 2010
    Applicant: Hyundai Motor Company
    Inventors: Sun Soon PARK, Seong Pil RYU, Hee Seok JEONG, Sang Uk KWON, Nam Woo LEE, Seo Ho CHOI