Patents by Inventor Kyoung Ku HA
Kyoung Ku HA 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).
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Publication number: 20240047720Abstract: Disclosed is a fuel cell system including a fuel cell stack, an enclosure surrounding the fuel cell stack, an air supply line connected to the fuel cell stack and configured to supply air to the fuel cell stack, an air compressor disposed in the air supply line and configured to compress and supply air, a cooler disposed in the air supply line, positioned at a downstream side of the air compressor, and configured to cool the air having passed through the air compressor, a bypass line having one end disposed between the air compressor and the cooler and connected to the air supply line, the other end connected to a separation space between the fuel cell stack and the enclosure, and a circulation line having one end connected to the separation space, the other end disposed at a downstream side of the cooler and connected to the air supply line.Type: ApplicationFiled: December 13, 2022Publication date: February 8, 2024Inventors: Ju Yong Lee, Sang Mi Choi, Kyoung Ku Ha, Yeon Su Nam
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Publication number: 20240030764Abstract: Disclosed is a rotor including a sleeve part having a shape corresponding to a cylinder extending in a reference direction, and having an inner hole extending in the reference direction, in an interior thereof, a division part disposed in the inner hole, and dividing the inner hole into a first space and a second space, together with the sleeve part, a first magnet part disposed in the first space, and a second magnet part disposed in the second space, and disposed to have an opposite polarity to that of the first magnet part when viewed along the reference direction.Type: ApplicationFiled: March 28, 2023Publication date: January 25, 2024Inventors: Hyo Jeong Lee, Kyoung Ku Ha, Hong Seok Kim, Sung Il Kim, Young Doo Yoon, Hyun Sung Kim, Sang Gyu Lee, Min Seong Lee
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Publication number: 20230327152Abstract: Provided is a fuel cell system for a vehicle, the fuel cell system including a fuel cell stack provided in a vehicle, an air duct including an air inflow path through which air is introduced, and an air outflow path through which the air is discharged to the fuel cell stack, and an air inlet/outlet flow path having one end connected to the air duct and the other end exposed to the outside of the air duct, the air inlet/outlet flow path being configured to allow the air to selectively enter or exit the air duct depending on an operation of the fuel cell stack, thereby obtaining an advantageous effect of improving safety, reliability, operational efficiency, and durability by inhibiting unnecessary surplus power generation of the fuel cell stack.Type: ApplicationFiled: August 20, 2022Publication date: October 12, 2023Inventor: Kyoung Ku HA
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Patent number: 11764373Abstract: A stack ventilation system includes a supply line that supplies a supply gas to an air electrode of a fuel cell stack, a discharge line that discharges an exhaust gas released from the air electrode, and a stack supply line that branches off from a branching point of the supply line and that supplies the supply gas in the supply line to a stack enclosure in which the fuel cell stack is accommodated.Type: GrantFiled: March 22, 2021Date of Patent: September 19, 2023Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Byeong Seung Lee, Kyoung Ku Ha
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Patent number: 11605827Abstract: An apparatus for regulating pressure of exhaust gas of a fuel cell system includes porous foam mounted in an exhaust tube and having a plurality of pores therein and a regulator that compresses or expands the porous foam to regulate a differential pressure of the exhaust gas flowing through the exhaust tube.Type: GrantFiled: April 5, 2019Date of Patent: March 14, 2023Assignees: Hyundai Motor Company, KIA Motors CorporationInventors: Kyoung Ku Ha, Byeong Seung Lee, Jeong Hee Park
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Publication number: 20220190362Abstract: A stack ventilation system includes a supply line that supplies a supply gas to an air electrode of a fuel cell stack, a discharge line that discharges an exhaust gas released from the air electrode, and a stack supply line that branches off from a branching point of the supply line and that supplies the supply gas in the supply line to a stack enclosure in which the fuel cell stack is accommodated.Type: ApplicationFiled: March 22, 2021Publication date: June 16, 2022Inventors: Byeong Seung Lee, Kyoung Ku Ha
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Patent number: 10873095Abstract: A valve device includes: a valve housing having a valve passage connected with an air flow passage; a valve disk rotatably disposed inside the valve housing through a valve driver and changing air flow cross-section of the valve passage; and a porous member installed at the valve disk and positioned in an open section between the valve disk and the valve passage.Type: GrantFiled: September 27, 2018Date of Patent: December 22, 2020Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventors: Jeong Hee Park, Byeong Seung Lee, Kyoung Ku Ha, Hyunyoo Kim
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Patent number: 10862145Abstract: A humidifying device, which exchanges moisture between air supplied from an air compressor and air exhausted from the fuel cell, for a fuel cell, includes: a housing main body; at least one humidifying membrane module disposed in the housing main body; and a valve assembly which is disposed in the housing main body and adjusts a supply amount of exhaust air flowed into the at least one humidifying membrane module based on a predetermined supply amount of supply air flowed into the at least one humidifying membrane module.Type: GrantFiled: November 16, 2018Date of Patent: December 8, 2020Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventors: Sae Han Oh, Jeong Hee Park, Kyoung Ku Ha, Hyunyoo Kim, Chang Ha Lee
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Patent number: 10756362Abstract: An air shut-off valve apparatus for a fuel cell system is provided. The apparatus includes a valve body having an inlet-side air passage through which supply air flows and an outlet-side air passage through which exhaust air flows. A valve flap is installed in the valve body to open or close the inlet-side air passage and the outlet-side air passage. An inlet-side check valve is opened when pressure of the supply air is greater than or equal to a predetermined pressure, to guide the supply air into the fuel cell stack through the inlet-side air passage even while the valve flap is closed. An outlet-side check valve is opened when pressure of the exhaust air is greater than or equal to a predetermined pressure, to guide the exhaust air released from the fuel cell stack to flow through the outlet-side air passage even while the valve flap is closed.Type: GrantFiled: April 5, 2019Date of Patent: August 25, 2020Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Byeong Seung Lee, Kyoung Ku Ha, Hyun Yoo Kim, Jeong Hee Park
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Publication number: 20200212460Abstract: An air shut-off valve apparatus for a fuel cell system is provided. The apparatus includes a valve body having an inlet-side air passage through which supply air flows and an outlet-side air passage through which exhaust air flows. A valve flap is installed in the valve body to open or close the inlet-side air passage and the outlet-side air passage. An inlet-side check valve is opened when pressure of the supply air is greater than or equal to a predetermined pressure, to guide the supply air into the fuel cell stack through the inlet-side air passage even while the valve flap is closed. An outlet-side check valve is opened when pressure of the exhaust air is greater than or equal to a predetermined pressure, to guide the exhaust air released from the fuel cell stack to flow through the outlet-side air passage even while the valve flap is closed.Type: ApplicationFiled: April 5, 2019Publication date: July 2, 2020Inventors: Byeong Seung Lee, Kyoung Ku Ha, Hyun Yoo Kim, Jeong Hee Park
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Publication number: 20200185745Abstract: An apparatus for regulating pressure of exhaust gas of a fuel cell system includes porous foam mounted in an exhaust tube and having a plurality of pores therein and a regulator that compresses or expands the porous foam to regulate a differential pressure of the exhaust gas flowing through the exhaust tube.Type: ApplicationFiled: April 5, 2019Publication date: June 11, 2020Applicants: Hyundai Motor Company, KIA Motors CorporationInventors: Kyoung Ku Ha, Byeong Seung Lee, Jeong Hee Park
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Publication number: 20200132077Abstract: A compressor includes a shaft extending in axial directions thereof, an impeller secured to one end of the shaft, a first bearing action member provided at the one end of the shaft, a second bearing action member provided at an opposite end of the shaft that is opposite to the one end of the shaft, a first bearing that acts on the first bearing action member and supports the first bearing action member in one axial direction of the axial directions and in a radially inward direction of the shaft, and a second bearing that acts on the second bearing action member and supports the second bearing action member in another axial direction, which is opposite to the one axial direction, and in the radially inward direction of the shaft.Type: ApplicationFiled: June 27, 2019Publication date: April 30, 2020Applicants: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventors: Kyoung Ku Ha, Chang Ha Lee
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Patent number: 10473153Abstract: An air foil bearing assembly is provided. The air foil bearing assembly includes a bearing housing that has a hollow into which a rotary shaft is fitted and a slot of which both ends are open toward front and rear sides formed on an inner circumference surface of the hollow. A bump foil is provided to have a combining portion inserted to the slot and disposed in the inner circumference surface of the hollow. A top foil having a combining portion is inserted to the slot and is disposed in an inner side of the bump foil. A stopper is disposed on one of the combining portions of the bump foil or the top foil to prevent the combining portion of the bump foil or the top foil from being displaced from the slot toward the front and rear sides.Type: GrantFiled: July 15, 2018Date of Patent: November 12, 2019Assignees: Hyundai Motor Company, Kia Motors CorporatlionInventors: Kyoung Ku Ha, Chang Ha Lee
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Publication number: 20190326618Abstract: A humidifying device, which exchanges moisture between air supplied from an air compressor and air exhausted from the fuel cell, for a fuel cell, includes: a housing main body; at least one humidifying membrane module disposed in the housing main body; and a valve assembly which is disposed in the housing main body and adjusts a supply amount of exhaust air flowed into the at least one humidifying membrane module based on a predetermined supply amount of supply air flowed into the at least one humidifying membrane module.Type: ApplicationFiled: November 16, 2018Publication date: October 24, 2019Inventors: Sae Han OH, Jeong Hee PARK, Kyoung Ku HA, Hyunyoo KIM, Chang Ha LEE
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Publication number: 20190326617Abstract: A valve device includes: a valve housing having a valve passage connected with an air flow passage; a valve disk rotatably disposed inside the valve housing through a valve driver and changing air flow cross-section of the valve passage; and a porous member installed at the valve disk and positioned in an open section between the valve disk and the valve passage.Type: ApplicationFiled: September 27, 2018Publication date: October 24, 2019Inventors: Jeong Hee PARK, Byeong Seung LEE, Kyoung Ku HA, Hyunyoo KIM
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Publication number: 20190178286Abstract: An air foil bearing assembly is provided. The air foil bearing assembly includes a bearing housing that has a hollow into which a rotary shaft is fitted and a slot of which both ends are open toward front and rear sides formed on an inner circumference surface of the hollow. A bump foil is provided to have a combining portion inserted to the slot and disposed in the inner circumference surface of the hollow. A top foil having a combining portion is inserted to the slot and is disposed in an inner side of the bump foil. A stopper is disposed on one of the combining portions of the bump foil or the top foil to prevent the combining portion of the bump foil or the top foil from being displaced from the slot toward the front and rear sides.Type: ApplicationFiled: July 15, 2018Publication date: June 13, 2019Inventors: Kyoung Ku Ha, Chang Ha Lee
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Patent number: 10263548Abstract: Disclosed are a method and a system for feedback-controlling including controlling a current supply unit in a controller so that an output applied to a driving unit from the current supply unit is repeatedly turned on/off by predetermined period and duty. The method also includes feedback-controlling of an output value of the controller applied to the current supply unit from the controller so that the output of the current supply unit follows a target value. The feedback-controlling includes an integration control process and stops the integration control process in the period that the current supply unit turns off the output thereof.Type: GrantFiled: December 7, 2017Date of Patent: April 16, 2019Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Dong Hun Lee, Keun Bong Ham, Chang Ha Lee, Kyoung Ku Ha, Min Su Kang, Chang Seok You, Sung Do Kim
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Patent number: 10230116Abstract: An air supply apparatus and method for a fuel cell, which supplies high-pressure air while avoiding a surge phenomenon of a turbo type compressor in a fuel cell system to which the turbo type compressor is applied is provided. In particular, a portion of air from an outlet of a compressor to an inlet of the compressor is recirculated to the supply of air supplied from the compressor to a stack. This recirculated air and external air introduced from the outside are mixed and supplied to the inlet of the compressor at a sufficiently high air pressure, allowing the compressor to avoid a surge region and enabling the supply of air with a high pressure and a low flow rate.Type: GrantFiled: December 11, 2014Date of Patent: March 12, 2019Assignee: Hyundai Motor CompanyInventors: Hyuck Roul Kwon, Chang Ha Lee, Kyoung Ku Ha
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Publication number: 20190074785Abstract: Disclosed are a method and a system for feedback-controlling including controlling a current supply unit in a controller so that an output applied to a driving unit from the current supply unit is repeatedly turned on/off by predetermined period and duty. The method also includes feedback-controlling of an output value of the controller applied to the current supply unit from the controller so that the output of the current supply unit follows a target value. The feedback-controlling includes an integration control process and stops the integration control process in the period that the current supply unit turns off the output thereof.Type: ApplicationFiled: December 7, 2017Publication date: March 7, 2019Inventors: Dong Hun Lee, Keun Bong Ham, Chang Ha Lee, Kyoung Ku Ha, Min Su Kang, Chang Seok You, Sung Do Kim
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Patent number: 10138932Abstract: The present disclosure relates to an improved air foil thrust bearing having a reduced number of components and an increased load support area. The improved air foil thrust bearing comprises a base plate and a plurality of foils attached to the base plate, wherein each of the foils comprises a top foil section and a bump foil section connected to and integral with the top foil section.Type: GrantFiled: July 3, 2017Date of Patent: November 27, 2018Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventors: Kyoung-Ku Ha, Chang-Ha Lee