Patents by Inventor Kil-Young Youn
Kil-Young Youn 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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Patent number: 11745621Abstract: A method for equalizing SOCs of battery packs in an electric vehicle, may include acquiring, by a controller, SOC information of the battery packs from battery pack state information acquired by state detectors under predetermined conditions of the electric vehicle, determining, by the controller, an average SOC value of the battery packs based on acquired SOC values of the respective battery packs, determining, by the controller, at least one battery pack required to be discharged for equalization of the SOCs of the battery packs among all the battery packs based on the SOC values of the respective battery packs and the determined average SOC value of the battery packs, and operating, by the controller, an electric load connected to the at least one determined battery pack required to be discharged to discharge the at least one determined battery pack required to be discharged.Type: GrantFiled: November 4, 2021Date of Patent: September 5, 2023Assignees: Hyundai Motor Company, Kia CorporationInventors: Kil Young Youn, Jung Moon Chang
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Publication number: 20220324350Abstract: A method for equalizing SOCs of battery packs in an electric vehicle, may include acquiring, by a controller, SOC information of the battery packs from battery pack state information acquired by state detectors under predetermined conditions of the electric vehicle, determining, by the controller, an average SOC value of the battery packs based on acquired SOC values of the respective battery packs, determining, by the controller, at least one battery pack required to be discharged for equalization of the SOCs of the battery packs among all the battery packs based on the SOC values of the respective battery packs and the determined average SOC value of the battery packs, and operating, by the controller, an electric load connected to the at least one determined battery pack required to be discharged to discharge the at least one determined battery pack required to be discharged.Type: ApplicationFiled: November 4, 2021Publication date: October 13, 2022Applicants: Hyundai Motor Company, Kia CorporationInventors: Kil Young YOUN, Jung Moon Chang
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Patent number: 11108261Abstract: A supplementary charging system for an auxiliary battery of an eco-friendly vehicle includes: a main battery; an auxiliary battery having a voltage lower than a voltage of the main battery; a low voltage DC-DC converter (LDC) stepping down the voltage of the main battery and providing the stepped-down voltage to the auxiliary battery; and a controller configured to select, when a periodic charge time of the auxiliary battery arrives, either a constant voltage charging method or a constant current charging method as a charging method based on an aging state of the auxiliary battery, and control the LDC to charge the auxiliary battery with a constant voltage or a constant current based on the selected charging method for a predetermined reference time. The controller terminates the charging when a cumulative charge current amount is greater than or equal to a predetermined reference cumulative charge current amount.Type: GrantFiled: July 31, 2019Date of Patent: August 31, 2021Assignees: Hyundai Motor Company, KIA Motors CorporationInventors: Kil Young Youn, Seung Hyeon Bin, Sang Kyu Lee, Jae Hwa Jeon
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Patent number: 11091051Abstract: A cooling control system and method for an on-board charger of a plug-in vehicle drive an electric water pump using a cooling control map when the temperature of the on-board charger equipped in a plug-in vehicle is equal to or above an overheat prevention temperature. The cooling control system and the method determine an entry of an optimal cooling control mode to cool the on-board charger to a temperature at which charging operational efficiency is maximized when the temperature of the on-board charger is below the overheat prevention temperature. Thereby, the on-board charger is cooled and the standard charging efficiency and the charge depletion fuel economy of the plug-in vehicle is maximized.Type: GrantFiled: September 4, 2019Date of Patent: August 17, 2021Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventors: Seung Hyeon Bin, Kil Young Youn, Sang Kyu Lee, Jae Hwa Jeon
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Patent number: 10968813Abstract: A hybrid cooling system of a vehicle includes a first cooling system having an engine, a first radiator, and a first water pump. A second cooling system includes a PE system, a second radiator, and a second water pump. A first cooling passage connects the engine and the PE system. A second cooling passage connects the first radiator and the second radiator. A third cooling passage and a fourth cooling passage connect the first cooling passage and the second cooling passage. Three-way valves is provided in the third cooling passage and the fourth cooling passage, respectively, to enable integrated cooling or individual cooling by opening and closing of the three-way valves.Type: GrantFiled: June 27, 2018Date of Patent: April 6, 2021Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventor: Kil Young Youn
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Publication number: 20200298718Abstract: A cooling control system and method for an on-board charger of a plug-in vehicle drive an electric water pump using a cooling control map when the temperature of the on-board charger equipped in a plug-in vehicle is equal to or above an overheat prevention temperature. The cooling control system and the method determine an entry of an optimal cooling control mode to cool the on-board charger to a temperature at which charging operational efficiency is maximized when the temperature of the on-board charger is below the overheat prevention temperature. Thereby, the on-board charger is cooled and the standard charging efficiency and the charge depletion fuel economy of the plug-in vehicle is maximized.Type: ApplicationFiled: September 4, 2019Publication date: September 24, 2020Applicants: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventors: Seung Hyeon Bin, Kil Young Youn, Sang Kyu Lee, Jae Hwa Jeon
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Publication number: 20200185943Abstract: A supplementary charging system for an auxiliary battery of an eco-friendly vehicle includes: a main battery; an auxiliary battery having a voltage lower than that of the main battery; a low voltage DC-DC converter (LDC) stepping down the voltage of the main battery and providing the same to the auxiliary battery; and a controller that selects, when a periodic charge time of the auxiliary battery arrives, either a constant voltage charging method or a constant current charging method based on an aging state of the auxiliary battery, and that controls the LDC to charge the auxiliary battery with a constant voltage or a constant current based on the selected charging method for a predetermined reference time. The controller terminates the charging when a cumulative charge current amount is greater than or equal to a predetermined reference cumulative charge current amount.Type: ApplicationFiled: July 31, 2019Publication date: June 11, 2020Applicants: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventors: Kil Young YOUN, Seung Hyeon BIN, Sang Kyu LEE, Jae Hwa JEON
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Patent number: 10471834Abstract: A plug-in vehicle capable of wired-charging a battery through a charging connector using an external charger and a method for controlling the same are provided. The method for controlling charging of a vehicle configured to perform a charging operation using external power includes determining whether a refrigerant circulation device operates normally and the amount of refrigerant is normal when a temperature sensor of a charger malfunctions. When the refrigerant circulation device operates normally and the amount of refrigerant is normal, a temperature of the charger is estimated using a temperature of a heat dissipation device through which the refrigerant passes and the output of the charger is adjusted based on the estimated temperature.Type: GrantFiled: December 20, 2017Date of Patent: November 12, 2019Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Jae Hwa Jeon, Sang Kyu Lee, Kil Young Youn, Seung Hyeon Bin, Gu Bae Kang
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Patent number: 10457270Abstract: A method for controlling a hybrid starter and generator (HSG) is applied to an eco-friendly vehicle. The method includes HSG torque-output limiting control, and in particular, the HSG torque-output limiting control is divided into an HSG regeneration mode and an HSG driving mode in which output limitation of the HSG 3 is performed after torque limitation of the HSG 3. Furthermore, the HSG regeneration mode includes: a former regenerative torque output control in which an engine RPM is converted by a controller 10 into regenerative torque output of the HSG 3 for about 1 second when an engine starts idling to charge a battery, and a latter regenerative torque output control in which the engine RPM is converted into the regenerative torque output of the HSG 3 after 1 second to about five seconds to continue to charge the battery 7, and an HSG driving mode.Type: GrantFiled: November 30, 2017Date of Patent: October 29, 2019Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventors: Kil-Young Youn, Young-Un Kim, Yong-Sung Jang
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Patent number: 10160307Abstract: The present disclosure provides a system and a method of controlling motor temperature for a green car including: a drive motor as a power source; a battery configured to provide a driving voltage to the drive motor; a water pump configured to supply coolant to the drive motor to cool the drive motor; a data detector configured to detect data regarding a driving state of the green car; and a vehicle controller configured to determine a driving mode based on the data regarding the driving state, to determine pump control rotation speed based on the driving mode, SOC of the battery, or motor temperature of the drive motor, and to operate the water pump based on the pump control rotation speed to change flow rate of the coolant supplied to the drive motor.Type: GrantFiled: May 18, 2017Date of Patent: December 25, 2018Assignee: HYUNDAI MOTOR COMPANYInventors: Jeongbin Yim, Jinho Kim, Kil Young Youn, Jae Sang Lim
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Publication number: 20180354376Abstract: A plug-in vehicle capable of wired-charging a battery through a charging connector using an external charger and a method for controlling the same are provided. The method for controlling charging of a vehicle configured to perform a charging operation using external power includes determining whether a refrigerant circulation device operates normally and the amount of refrigerant is normal when a temperature sensor of a charger malfunctions. When the refrigerant circulation device operates normally and the amount of refrigerant is normal, a temperature of the charger is estimated using a temperature of a heat dissipation device through which the refrigerant passes and the output of the charger is adjusted based on the estimated temperature.Type: ApplicationFiled: December 20, 2017Publication date: December 13, 2018Inventors: Jae Hwa Jeon, Sang Kyu Lee, Kil Young Youn, Seung Hyeon Bin, Gu Bae Kang
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Patent number: 10131346Abstract: A method for diagnosing demagnetization of a motor of a vehicle can accurately diagnose an irreversible demagnetization state of a permanent magnet of a traction motor or a hybrid starter-generator (HSG) without additional hardware, while minimizing influence of irreversible demagnetization of the permanent magnet of the traction motor or the HSG on vehicle performance. The method includes acquiring operating state information of the motor, determining whether a diagnosis entrance condition including a state in which the motor performs an electricity generating operation is satisfied based on the acquired operating state information of the motor, acquiring a direct current (DC) value in diagnosis, and determining whether irreversible demagnetization occurs by comparing the acquired DC value in diagnosis with a pre-stored DC current value in a normal state of the permanent magnet.Type: GrantFiled: December 5, 2015Date of Patent: November 20, 2018Assignee: Hyundai Motor CompanyInventors: Seong Min Kim, Jae Sang Lim, Kil Young Youn, Ji Wan Cha, Young Un Kim, Jeong Won Rho
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Publication number: 20180313253Abstract: A hybrid cooling system of a vehicle includes a first cooling system having an engine, a first radiator, and a first water pump. A second cooling system includes a PE system, a second radiator, and a second water pump. A first cooling passage connects the engine and the PE system. A second cooling passage connects the first radiator and the second radiator. A third cooling passage and a fourth cooling passage connect the first cooling passage and the second cooling passage. Three-way valves is provided in the third cooling passage and the fourth cooling passage, respectively, to enable integrated cooling or individual cooling by opening and closing of the three-way valves.Type: ApplicationFiled: June 27, 2018Publication date: November 1, 2018Inventor: Kil Young YOUN
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Patent number: 10044317Abstract: A method and system for controlling a switching frequency of a vehicle are provided. The method includes monitoring, by a controller of the vehicle, a temperature of a motor, a temperature of a coolant, and a quantity of a coolant when a vehicle engine is turned on. Additionally a switching frequency of an inverter is adjusted based on the monitored temperature of the motor, the monitored temperature of the coolant, and the monitored quantity of the coolant.Type: GrantFiled: November 22, 2016Date of Patent: August 7, 2018Assignee: Hyundai Motor CompanyInventors: Kil Young Youn, Gu Bae Kang, Jae Sang Lim
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Publication number: 20180162358Abstract: A method for controlling a hybrid starter and generator (HSG) is applied to an eco-friendly vehicle. The method includes HSG torque-output limiting control, and in particular, the HSG torque-output limiting control is divided into an HSG regeneration mode and an HSG driving mode in which output limitation of the HSG 3 is performed after torque limitation of the HSG 3. Furthermore, the HSG regeneration mode includes: a former regenerative torque output control in which an engine RPM is converted by a controller 10 into regenerative torque output of the HSG 3 for about 1 second when an engine starts idling to charge a battery, and a latter regenerative torque output control in which the engine RPM is converted into the regenerative torque output of the HSG 3 after 1 second to about five seconds to continue to charge the battery 7, and an HSG driving mode.Type: ApplicationFiled: November 30, 2017Publication date: June 14, 2018Applicants: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventors: Kil-Young YOUN, Young-Un KIM, Yong-Sung JANG
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Patent number: 9973136Abstract: A method for controlling a motor based on a variable current controller gain may include a temperature function current applying mode in which when a torque command for the motor is detected by an inverter, 3-phase current to be applied to the motor is output to the motor in consideration of a motor temperature of the motor as a function.Type: GrantFiled: November 30, 2016Date of Patent: May 15, 2018Assignee: Hyundai Motor CompanyInventors: Jae-Sang Lim, Kil-Young Youn, Jin-Ho Kim, Jeong-Bin Yin
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Publication number: 20180126840Abstract: The present disclosure provides a system and a method of controlling motor temperature for a green car including: a drive motor as a power source; a battery configured to provide a driving voltage to the drive motor; a water pump configured to supply coolant to the drive motor to cool the drive motor; a data detector configured to detect data regarding a driving state of the green car; and a vehicle controller configured to determine a driving mode based on the data regarding the driving state, to determine pump control rotation speed based on the driving mode, SOC of the battery, or motor temperature of the drive motor, and to operate the water pump based on the pump control rotation speed to change flow rate of the coolant supplied to the drive motor.Type: ApplicationFiled: May 18, 2017Publication date: May 10, 2018Applicant: HYUNDAI MOTOR COMPANYInventors: Jeongbin YIM, Jinho KIM, Kil Young YOUN, Jae Sang LIM
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Publication number: 20180083566Abstract: A method for controlling a motor based on a variable current controller gain may include a temperature function current applying mode in which when a torque command for the motor is detected by an inverter, 3-phase current to be applied to the motor is output to the motor in consideration of a motor temperature of the motor as a function.Type: ApplicationFiled: November 30, 2016Publication date: March 22, 2018Applicant: Hyundai Motor CompanyInventors: Jae-Sang LIM, Kil-Young YOUN, Jin-Ho KIM, Jeong-Bin YIN
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Publication number: 20180054153Abstract: A method and system for controlling a switching frequency of a vehicle are provided. The method includes monitoring, by a controller of the vehicle, a temperature of a motor, a temperature of a coolant, and a quantity of a coolant when a vehicle engine is turned on. Additionally a switching frequency of an inverter is adjusted based on the monitored temperature of the motor, the monitored temperature of the coolant, and the monitored quantity of the coolant.Type: ApplicationFiled: November 22, 2016Publication date: February 22, 2018Inventors: Kil Young Youn, Gu Bae Kang, Jae Sang Lim
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Publication number: 20160368487Abstract: A method for diagnosing demagnetization of a motor of a vehicle can accurately diagnose an irreversible demagnetization state of a permanent magnet of a traction motor or a hybrid starter-generator (HSG) without additional hardware, while minimizing influence of irreversible demagnetization of the permanent magnet of the traction motor or the HSG on vehicle performance. The method includes acquiring operating state information of the motor, determining whether a diagnosis entrance condition including a state in which the motor performs an electricity generating operation is satisfied based on the acquired operating state information of the motor, acquiring a direct current (DC) value in diagnosis, which is used for diagnosis of irreversible demagnetization of the motor when the diagnosis entrance condition is satisfied, and determining whether irreversible demagnetization occurs by comparing the acquired DC value in diagnosis with a pre-stored DC current value in a normal state of the permanent magnet.Type: ApplicationFiled: December 5, 2015Publication date: December 22, 2016Inventors: Seong Min Kim, Jae Sang Lim, Kil Young Youn, Ji Wan Cha, Young Un Kim, Jeong Won Rho