Patents by Inventor Bu Kil Kwon

Bu Kil Kwon 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: 10920900
    Abstract: A fuel supply valve is provided. The fuel supply valve includes a housing of the valve, a plunger and a hollow part. A cavity where the plunger moves is formed at one side of the housing and a contact area is formed between the housing and the plunger based on the movement of the plunger. Accordingly, fuel flow in the cavity is limited by the contact.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: February 16, 2021
    Assignee: Hyundai Motor Company
    Inventors: Bu Kil Kwon, Se Kwon Jung, Hyo Sub Shim
  • Patent number: 10811709
    Abstract: A method of controlling purge of a fuel cell system for a vehicle is provided. The method determines whether a purge function is normally performed in controlling purge of discharging nitrogen, hydrogen, and vapor within an anode of a fuel cell system. Particularly, the method confirms whether purge is performed by measuring a duty or a current applied to a hydrogen supply valve and measuring a change in the duty before and after an application of a purge valve operation command while adjusting a pressure inside the anode, which supplies hydrogen, to be uniform. Further, a hydrogen supply amount supplied into an anode is estimated and a change rate of a hydrogen supply amount supplied to the anode and a hydrogen amount consumed during a generation of the fuel cell system are estimated during a purge function, to determine whether purge is actually performed based on the estimated information.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: October 20, 2020
    Assignee: Hyundai Motor Company
    Inventors: Se Kwon Jung, Bu Kil Kwon
  • Patent number: 10788337
    Abstract: The present invention provides a method of outputting a level of a capacitive level sensor which may be provided in a water trap of a fuel cell system and the method of outputting a level of a capacitive level sensor including a level sensor including a plurality of electrodes for measuring capacitance, and an upper electrode and a lower electrode which are able to be disposed adjacent to each other in the level sensor, including: (a) measuring a change in an output value of the lower electrode; and (b) measuring a change in an output value of the upper electrode.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: September 29, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation, Sejong Industrial Co., Ltd.
    Inventors: Hyo Sub Shim, Bu Kil Kwon, Ho Cheol Suh, Seok Yun Jang
  • Patent number: 10727507
    Abstract: A fuel cell system including a hydrogen shut-off valve and a hydrogen supply valve connected therewith, the fuel cell system including: a holder capable of accommodating the hydrogen supply valve, wherein the holder includes a rupture part which may be formed at one point between the hydrogen supply valve and the hydrogen shut-off valve, and the hydrogen shut-off valve may be accommodated in one or more extended ends of the holder, and when the rupture part is cut off by external shock the hydrogen shut-off valve and the hydrogen supply valve are disconnected from each other.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: July 28, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Se Kwon Jung, Hyo Sub Shim, Bu Kil Kwon
  • Patent number: 10476088
    Abstract: A manifold device of a fuel cell stack is provided which prevents moisture condensed in gases supplied to the fuel cell stack from excessively flowing into specific cells of the stack by heating gases supplied into the stack using heat of the stack. The manifold device also prevents flooding that is caused by liquid generated in cells disposed away from a gas inlet by removing a flow rate difference of gases generated in respective cells based on distances from the gas inlet of the stack.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: November 12, 2019
    Assignee: Hyundai Motor Company
    Inventors: Bu Kil Kwon, Yong Gyu Noh, Hyun Joon Lee, Young Mo Goo, Seung Eul Yoo
  • Patent number: 10403912
    Abstract: An anode discharge valve for a fuel cell system includes a valve main body which is installed in a hydrogen recirculation line of a fuel cell stack; a drive shaft which is rotatably installed in the valve main body, and coupled to an opening member which selectively opens a hydrogen discharge port by being rotated; and a mechanism which is connected to a hydrogen inlet port of the valve main body so as to form a hydrogen inflow path, and operates to rotate the drive shaft as a pressure of hydrogen inflowing through the hydrogen inflow path increases.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: September 3, 2019
    Assignee: Hyundai Motor Company
    Inventors: Bu Kil Kwon, Se Kwon Jung, Hyun Joon Lee, Hyo Sub Shim
  • Patent number: 10367209
    Abstract: A recycling system in which anode off gas of a fuel cell is recycled to a stack includes a purge flow path purging the anode off gas passing through the stack, and a sprayer spraying pure gas supplied from a fuel tank to the stack. The sprayer is disposed on a path where the anode off gas passing through the stack is discharged, the purge flow path is spaced a certain distance from the sprayer, and the anode off gas passing through the stack is mixed with the pure gas by suction force of the sprayer to be introduced to the stack, thereby being recycled.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: July 30, 2019
    Assignee: Hyundai Motor Company
    Inventors: Bu Kil Kwon, Duck Whan Kim, Se Kwon Jung, Ik Jae Son, Hyo Sub Shim
  • Publication number: 20180238715
    Abstract: The present invention provides a method of outputting a level of a capacitive level sensor which may be provided in a water trap of a fuel cell system and the method of outputting a level of a capacitive level sensor including a level sensor including a plurality of electrodes for measuring capacitance, and an upper electrode and a lower electrode which are able to be disposed adjacent to each other in the level sensor, including: (a) measuring a change in an output value of the lower electrode; and (b) measuring a change in an output value of the upper electrode.
    Type: Application
    Filed: September 18, 2017
    Publication date: August 23, 2018
    Inventors: Hyo Sub SHIM, Bu Kil KWON, Ho Cheol SUH, Seok Yun JANG
  • Patent number: 10030785
    Abstract: A valve for a fuel cell serves to discharge a fluid in a fuel cell system to the outside or other locations of the fuel cell system. The valve is mounted with a pressure transmission unit which is connected between a valve flow path unit having an inner flow path for moving a fluid and a solenoid unit for generating power for opening and closing the inner flow path of the valve flow path unit, and transmits pressure between the valve flow path unit and the solenoid unit, so as to minimize an operating load of the solenoid unit by minimizing a pressure difference between the valve flow path unit and the solenoid unit, regardless of factors such as working pressure and a temperature in the fuel cell system.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: July 24, 2018
    Assignee: Hyundai Motor Company
    Inventors: Se Kwon Jung, Hyo Sub Shim, Bu Kil Kwon
  • Publication number: 20180175422
    Abstract: A fuel cell system including a hydrogen shut-off valve and a hydrogen supply valve connected therewith, the fuel cell system including: a holder capable of accommodating the hydrogen supply valve, wherein the holder includes a rupture part which may be formed at one point between the hydrogen supply valve and the hydrogen shut-off valve, and the hydrogen shut-off valve may be accommodated in one or more extended ends of the holder, and when the rupture part is cut off by external shock the hydrogen shut-off valve and the hydrogen supply valve are disconnected from each other.
    Type: Application
    Filed: June 2, 2017
    Publication date: June 21, 2018
    Inventors: Se Kwon JUNG, Hyo Sub SHIM, Bu Kil KWON
  • Patent number: 9966616
    Abstract: An apparatus and method for controlling a purge valve of a fuel cell vehicle are provided to reduce a consumption amount of hydrogen and improve fuel efficiency. In particular, whether oxygen concentration in a channel of an anode of a fuel cell stack exceeds a reference value is estimated while restarting the vehicle after the vehicle is parked. Then, an open time of a purge valve is adjusted based on a parking time of a vehicle when the hydrogen concentration is greater than the reference value.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: May 8, 2018
    Assignee: Hyundai Motor Company
    Inventors: Hyun Jae Lee, Hyo Seop Kim, Yei Sik Jeon, Bu Kil Kwon
  • Publication number: 20180073657
    Abstract: A structure for preventing vibration of a solenoid valve includes: a plunger which opens and closes a flow path by moving inside the solenoid valve; a yoke attached to an inner surface of a valve core; and a friction member disposed along an outer circumferential surface of the plunger between the plunger and the yoke, in which the friction member presses the yoke between the yoke and the plunger.
    Type: Application
    Filed: December 19, 2016
    Publication date: March 15, 2018
    Inventors: Se Kwon JUNG, Bu Kil KWON
  • Publication number: 20180023722
    Abstract: A fuel supply valve is provided. The fuel supply valve includes a housing of the valve, a plunger and a hollow part. A cavity where the plunger moves is formed at one side of the housing and a contact area is formed between the housing and the plunger based on the movement of the plunger. Accordingly, fuel flow in the cavity is limited by the contact.
    Type: Application
    Filed: November 30, 2016
    Publication date: January 25, 2018
    Inventors: Bu Kil Kwon, Se Kwon Jung, Hyo Sub Shim
  • Publication number: 20180026278
    Abstract: A recycling system in which anode off gas of a fuel cell is recycled to a stack includes a purge flow path purging the anode off gas passing through the stack, and a sprayer spraying pure gas supplied from a fuel tank to the stack. The sprayer is disposed on a path where the anode off gas passing through the stack is discharged, the purge flow path is spaced a certain distance from the sprayer, and the anode off gas passing through the stack is mixed with the pure gas by suction force of the sprayer to be introduced to the stack, thereby being recycled.
    Type: Application
    Filed: December 2, 2016
    Publication date: January 25, 2018
    Inventors: Bu Kil Kwon, Duck Whan Kim, Se Kwon Jung, Ik Jae Son, Hyo Sub Shim
  • Publication number: 20170322067
    Abstract: A device and a method for detecting a water level of a water trap in a fuel cell can accurately output a water level of water collected in the water trap by reaction of the fuel cell. The device and the method for detecting a water level of a water trap can detect a change in a surrounding temperature of a water level sensor by mounting a separate temperature sensor in the water level sensor and accurately output the water level in the water trap regardless of the change of the surrounding temperature through a water sensor output value correction algorithm based on a detected temperature.
    Type: Application
    Filed: December 7, 2016
    Publication date: November 9, 2017
    Inventors: Hyo Sub Shim, Bu Kil Kwon, Ho Suh, Seok Yun Jang
  • Publication number: 20170309932
    Abstract: An anode discharge valve for a fuel cell system includes a valve main body which is installed in a hydrogen recirculation line of a fuel cell stack; a drive shaft which is rotatably installed in the valve main body, and coupled to an opening member which selectively opens a hydrogen discharge port by being rotated; and a mechanism which is connected to a hydrogen inlet port of the valve main body so as to form a hydrogen inflow path, and operates to rotate the drive shaft as a pressure of hydrogen inflowing through the hydrogen inflow path increases.
    Type: Application
    Filed: September 19, 2016
    Publication date: October 26, 2017
    Inventors: Bu Kil Kwon, Se Kwon Jung, Hyun Joon Lee, Hyo Sub Shim
  • Patent number: 9748586
    Abstract: Disclosed are a system and a method for discharging a gas and condensed water for a fuel cell system. The gas and condensed water discharge system comprises: a fuel cell stack that includes cathodes and anodes and produces an electric current by an electrochemical reaction of oxygen and hydrogen; a water trap that temporarily stores gases and water discharged from anodes of the stack and condensed water; an integrated drain valve that is mounted at the water trap so as to generate the gas flow path for gases and the condensed water passing through a discharge portion of the integrated drain valve and discharged out of the water trap; and a controller that discharges the gases and the condensed water by opening and closing the integrated drain valve.
    Type: Grant
    Filed: November 29, 2014
    Date of Patent: August 29, 2017
    Assignee: Hyundai Motor Company
    Inventors: Hyo Sub Shim, Sekwon Jung, Bu Kil Kwon
  • Publication number: 20170179509
    Abstract: A valve for a fuel cell serves to discharge a fluid in a fuel cell system to the outside or other locations of the fuel cell system.
    Type: Application
    Filed: July 6, 2016
    Publication date: June 22, 2017
    Inventors: Se Kwon Jung, Hyo Sub Shim, Bu Kil Kwon
  • Publication number: 20170179511
    Abstract: A method of controlling purge of a fuel cell system for a vehicle is provided. The method determines whether a purge function is normally performed in controlling purge of discharging nitrogen, hydrogen, and vapor within an anode of a fuel cell system. Particularly, the method confirms whether purge is performed by measuring a duty or a current applied to a hydrogen supply valve and measuring a change in the duty before and after an application of a purge valve operation command while adjusting a pressure inside the anode, which supplies hydrogen, to be uniform. Further, a hydrogen supply amount supplied into an anode is estimated and a change rate of a hydrogen supply amount supplied to the anode and a hydrogen amount consumed during a generation of the fuel cell system are estimated during a purge function, to determine whether purge is actually performed based on the estimated information.
    Type: Application
    Filed: September 27, 2016
    Publication date: June 22, 2017
    Inventors: Se Kwon Jung, Bu Kil Kwon
  • Patent number: 9601797
    Abstract: A fuel cell stack manifold having an ejector function of which the manufacturing cost and the weight can be reduced by optimizing hydrogen supply and recirculation channels and removing other members. hardware without a separate ejector structure for additionally attaching an ejector, of which the productivity can be improved by removing from an ejector assembly process. The fuel cell system minimizes joints through which hydrogen may leak, by implementing a new structure of a manifold added with an ejector function by integrally forming/manufacturing a stack manifold having a venturi and diffuser structure and adding a nozzle thereto.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: March 21, 2017
    Assignee: Hyundai Motor Company
    Inventors: Se Kwon Jung, Duck Whan Kim, Yong Gyu Noh, Bu Kil Kwon