Patents by Inventor Nahm Roh Joo
Nahm Roh Joo 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: 20230242094Abstract: Methods and systems are described for a hybrid vehicle with a passive prechamber combustion engine. The system includes a passive prechamber combustion engine, an electric motor, and a controller communicatively coupled to the combustion engine and the electric motor. The combustion engine is configured to operate at engine loads satisfying a load threshold. The controller is configured to determine whether an engine load falls below the load threshold. The controller is configured to select the electric motor to propel the vehicle. The controller is configured to determine whether the engine load satisfies the load threshold. The controller is configured to select the combustion engine to propel the vehicle for providing efficient fuel consumption associated with prechamber ignition in response to determining that the engine load satisfies the load threshold.Type: ApplicationFiled: January 31, 2022Publication date: August 3, 2023Inventors: Mayuri Wagh, Mark Shirley, Nahm Roh Joo, Mark Bourcier, Antowan Zyada, Jeffrey Hollowell, Philip Zoldak
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Patent number: 11708063Abstract: A hybrid electric vehicle (HEV) for multiple operation modes includes: a gasoline diffusion flame (GDF) combustion engine configured to perform gasoline diffusion flame combustion; a motor-generator operatively connected to the GDF combustion engine and configured to selectively drive the HEV with electric power of a battery or generate electric power to charge the battery; and a multi-mode controller including a processor and configured to receive operating conditions of the GDF combustion engine and the motor-generator and define a plurality of mode operating regions based on the received operating conditions. In particular, the plurality of mode operating regions includes: an electric vehicle (EV) only mode operating region, a GDF mode operating region where the GDF combustion engine operates and drives the HEV while the motor-generator stops, and a GDF+EV mode operating region where the motor-generator assists the operation of the GDF combustion engine to drive the HEV.Type: GrantFiled: September 1, 2021Date of Patent: July 25, 2023Assignees: HYUNDAI MOTOR COMPANY, KIA CORPORATIONInventors: Mark Bourcier, Nahm Roh Joo, Antowan Zyada, Shengrong Zhu, Philip Zoldak
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Publication number: 20230066607Abstract: A hybrid electric vehicle (HEV) for multiple operation modes includes: a gasoline diffusion flame (GDF) combustion engine configured to perform gasoline diffusion flame combustion; a motor-generator operatively connected to the GDF combustion engine and configured to selectively drive the HEV with electric power of a battery or generate electric power to charge the battery; and a multi-mode controller including a processor and configured to receive operating conditions of the GDF combustion engine and the motor-generator and define a plurality of mode operating regions based on the received operating conditions. In particular, the plurality of mode operating regions includes: an electric vehicle (EV) only mode operating region, a GDF mode operating region where the GDF combustion engine operates and drives the HEV while the motor-generator stops, and a GDF+EV mode operating region where the motor-generator assists the operation of the GDF combustion engine to drive the HEV.Type: ApplicationFiled: September 1, 2021Publication date: March 2, 2023Applicants: HYUNDAI MOTOR COMPANY, KIA CORPORATIONInventors: Mark BOURCIER, Nahm Roh JOO, Antowan ZYADA, Shengrong ZHU, Philip ZOLDAK
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Patent number: 11371407Abstract: An after treatment method is disclosed. The after treatment method may include: operating an engine at a lean air/fuel ratio; calculating an amount of NH3 stored in an SCR catalyst; calculating an amount of NOx which will flow into the SCR catalyst; determining whether conversion to a rich air/fuel ratio is desired; calculating, when the conversion to the rich air/fuel ratio is desired, a rich duration for which the rich air/fuel ratio is maintained and a target air/fuel ratio; and operating the engine at the target air/fuel ratio for the rich duration.Type: GrantFiled: March 19, 2021Date of Patent: June 28, 2022Assignees: HYUNDAI MOTOR COMPANY, Kia Motors CorporationInventors: Nahm Roh Joo, Chang Hwan Kim, ChangHo Jung
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Patent number: 11073057Abstract: An after treatment system is disclosed. The after treatment system may include a three-way catalyst (TWC), a selective catalytic reduction (SCR) catalyst, and a CO clean-up catalyst (CUC) on an exhaust pipe through which an exhaust gas flows. The CUC may include a zeolite in which Cu and Fe are ion-exchanged and CeO2 in which Pt is supported, wherein a weight ratio of the CeO2 to a total weight of the CUC is 30-70 wt % such that the CUC purifies NH3 at a lean air/fuel ratio and purifies NH3 during a delay time at a rich air/fuel ratio.Type: GrantFiled: January 31, 2019Date of Patent: July 27, 2021Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventors: Nahm Roh Joo, Chang Hwan Kim, ChangHo Jung
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Publication number: 20210207513Abstract: An after treatment method is disclosed. The after treatment method may include: operating an engine at a lean air/fuel ratio; calculating an amount of NH3 stored in an SCR catalyst; calculating an amount of NOx which will flow into the SCR catalyst; determining whether conversion to a rich air/fuel ratio is desired; calculating, when the conversion to the rich air/fuel ratio is desired, a rich duration for which the rich air/fuel ratio is maintained and a target air/fuel ratio; and operating the engine at the target air/fuel ratio for the rich duration.Type: ApplicationFiled: March 19, 2021Publication date: July 8, 2021Applicants: HYUNDAI MOTOR COMPANY, Kia Motors CorporationInventors: Nahm Roh JOO, Chang Hwan KIM, ChangHo JUNG
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Patent number: 11035273Abstract: An after treatment system for a lean-burn engine is disclosed. The after treatment system is sequentially equipped with an ammonia production catalyst module, a selective catalytic reduction (SCR) catalyst, and a CO clean-up catalyst (CUC) on an exhaust pipe through which an exhaust gas flows and which is connected to a lean-burn engine. An exhaust flow changer is disposed between the ammonia production catalyst module and the SCR catalyst. The exhaust flow changer changes flow of an exhaust gas discharged from the ammonia production catalyst module according to a temperature of the SCR catalyst.Type: GrantFiled: January 31, 2019Date of Patent: June 15, 2021Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS COMPANYInventors: Nahm Roh Joo, ChangHo Jung, Chang Hwan Kim, Dohyung Kim
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Patent number: 10982578Abstract: An after treatment method is disclosed. The after treatment method may include: operating an engine at a lean air/fuel ratio; calculating an amount of NH3 stored in an SCR catalyst; calculating an amount of NOx which will flow into the SCR catalyst; determining whether conversion to a rich air/fuel ratio is desired; calculating, when the conversion to the rich air/fuel ratio is desired, a rich duration for which the rich air/fuel ratio is maintained and a target air/fuel ratio; and operating the engine at the target air/fuel ratio for the rich duration.Type: GrantFiled: January 31, 2019Date of Patent: April 20, 2021Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventors: Nahm Roh Joo, Chang Hwan Kim, ChangHo Jung
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Patent number: 10914217Abstract: An after treatment system is disclosed. The after treatment system may include an exhaust pipe through which an exhaust gas flows; a three-way catalyst (TWC) mounted on the exhaust pipe and purifying HC, CO, and NOx contained in the exhaust gas, an ammonia production catalyst (APC) mounted on the exhaust pipe at a downstream of the TWC, storing NOx at a lean air/fuel ratio, and generating H2, releasing the stored NOx, and generating NH3 using the released NOx and the generated H2 at a rich air/fuel ratio, and a selective catalytic reduction (SCR) catalyst mounted on the exhaust pipe at a downstream of the APC, storing the NH3 generated in the TWC and the APC, and reducing the NOx contained in the exhaust gas using the stored NH3.Type: GrantFiled: January 31, 2019Date of Patent: February 9, 2021Assignees: Hyundai Motor Company, KIA Motors CorporationInventors: Nahm Roh Joo, Chang Hwan Kim, ChangHo Jung
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Patent number: 10830118Abstract: An after treatment method for a lean-burn engine is disclosed. The after treatment method is configured to control an after treatment system sequentially equipped with an ammonia production catalyst module, a selective catalytic reduction (SCR) catalyst, and a CO clean-up catalyst (CUC) on an exhaust pipe through which an exhaust gas flows and which is connected to a lean-burn engine. In the after treatment method, a rich air/fuel ratio (AFR) is controlled in multiple phases in response to detecting that conversion to the rich AFR is desired.Type: GrantFiled: January 31, 2019Date of Patent: November 10, 2020Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventors: Nahm Roh Joo, ChangHo Jung, Chang Hwan Kim, Seung Jae Yi
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Patent number: 10808588Abstract: An after treatment method for a lean-burn engine is disclosed. The after treatment method is configured to control an after treatment system sequentially equipped with an ammonia production catalyst module, a selective catalytic reduction (SCR) catalyst, and a CO clean-up catalyst (CUC) on an exhaust pipe through which an exhaust gas flows and which is connected to a lean-burn engine. NH3 generation in the ammonia production catalyst module is changed according to a temperature and a temperature change rate of the SCR catalyst.Type: GrantFiled: January 31, 2019Date of Patent: October 20, 2020Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventors: Nahm Roh Joo, ChangHo Jung, Chang Hwan Kim, Dohyung Kim
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Publication number: 20200248603Abstract: An after treatment method is disclosed. The after treatment method may include: operating an engine at a lean air/fuel ratio; calculating an amount of NH3 stored in an SCR catalyst; calculating an amount of NOx which will flow into the SCR catalyst; determining whether conversion to a rich air/fuel ratio is desired; calculating, when the conversion to the rich air/fuel ratio is desired, a rich duration for which the rich air/fuel ratio is maintained and a target air/fuel ratio; and operating the engine at the target air/fuel ratio for the rich duration.Type: ApplicationFiled: January 31, 2019Publication date: August 6, 2020Applicants: Hyundai Motor Company, KIA Motors CorporationInventors: Nahm Roh Joo, Chang Hwan Kim, ChangHo Jung
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Publication number: 20200248606Abstract: An after treatment system is disclosed. The after treatment system may include an exhaust pipe through which an exhaust gas flows; a three-way catalyst (TWC) mounted on the exhaust pipe and purifying HC, CO, and NOx contained in the exhaust gas, an ammonia production catalyst (APC) mounted on the exhaust pipe at a downstream of the TWC, storing NOx at a lean air/fuel ratio, and generating H2, releasing the stored NOx, and generating NH3 using the released NOx and the generated H2 at a rich air/fuel ratio, and a selective catalytic reduction (SCR) catalyst mounted on the exhaust pipe at a downstream of the APC, storing the NH3 generated in the TWC and the APC, and reducing the NOx contained in the exhaust gas using the stored NH3.Type: ApplicationFiled: January 31, 2019Publication date: August 6, 2020Applicants: Hyundai Motor Company, KIA Motors CorporationInventors: Nahm Roh Joo, Chang Hwan Kim, ChangHo Jung
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Publication number: 20200248604Abstract: An after treatment system is disclosed. The after treatment system may include a three-way catalyst (TWC), a selective catalytic reduction (SCR) catalyst, and a CO clean-up catalyst (CUC) on an exhaust pipe through which an exhaust gas flows. The CUC may include a zeolite in which Cu and Fe are ion-exchanged and CeO2 in which Pt is supported, wherein a weight ratio of the CeO2 to a total weight of the CUC is 30-70 wt % such that the CUC purifies NH3 at a lean air/fuel ratio and purifies NH3 during a delay time at a rich air/fuel ratio.Type: ApplicationFiled: January 31, 2019Publication date: August 6, 2020Applicants: Hyundai Motor Company, KIA Motors CorporationInventors: Nahm Roh Joo, Chang Hwan Kim, ChangHo Jung
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Publication number: 20200248605Abstract: An after treatment system for a lean-burn engine is disclosed. The after treatment system is sequentially equipped with an ammonia production catalyst module, a selective catalytic reduction (SCR) catalyst, and a CO clean-up catalyst (CUC) on an exhaust pipe through which an exhaust gas flows and which is connected to a lean-burn engine. An exhaust flow changer is disposed between the ammonia production catalyst module and the SCR catalyst. The exhaust flow changer changes flow of an exhaust gas discharged from the ammonia production catalyst module according to a temperature of the SCR catalyst.Type: ApplicationFiled: January 31, 2019Publication date: August 6, 2020Applicants: Hyundai Motor Company, KIA Motors CorporationInventors: Nahm Roh Joo, ChangHo Jung, Chang Hwan Kim, Dohyung Kim
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Publication number: 20200248607Abstract: An after treatment method for a lean-burn engine is disclosed. The after treatment method is configured to control an after treatment system sequentially equipped with an ammonia production catalyst module, a selective catalytic reduction (SCR) catalyst, and a CO clean-up catalyst (CUC) on an exhaust pipe through which an exhaust gas flows and which is connected to a lean-burn engine. NH3 generation in the ammonia production catalyst module is changed according to a temperature and a temperature change rate of the SCR catalyst.Type: ApplicationFiled: January 31, 2019Publication date: August 6, 2020Applicants: Hyundai Motor Company, KIA Motors CorporationInventors: Nahm Roh Joo, ChangHo Jung, Chang Hwan Kim, Dohyung Kim
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Publication number: 20200248608Abstract: An after treatment method for a lean-burn engine is disclosed. The after treatment method is configured to control an after treatment system sequentially equipped with an ammonia production catalyst module, a selective catalytic reduction (SCR) catalyst, and a CO clean-up catalyst (CUC) on an exhaust pipe through which an exhaust gas flows and which is connected to a lean-burn engine. In the after treatment method, a rich air/fuel ratio (AFR) is controlled in multiple phases in response to detecting that conversion to the rich AFR is desired.Type: ApplicationFiled: January 31, 2019Publication date: August 6, 2020Applicants: Hyundai Motor Company, KIA Motors CorporationInventors: Nahm Roh Joo, ChangHo Jung, Chang Hwan Kim, Seung Jae Yi
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Patent number: 10697340Abstract: An after treatment method for a lean-burn engine is disclosed. The after treatment method is configured to control an after treatment system sequentially equipped with an ammonia production catalyst module, a selective catalytic reduction catalyst, and a CO clean-up catalyst on an exhaust pipe through which an exhaust gas flows. In the after treatment method, the engine is operated sequentially at a stoichiometric air/fuel ratio (AFR) and a lean AFR prior to entering a rich AFR.Type: GrantFiled: January 31, 2019Date of Patent: June 30, 2020Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATIONInventors: Nahm Roh Joo, Chang Hwan Kim, ChangHo Jung, Chulho Yu
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Publication number: 20190113008Abstract: An engine system may include: an engine including a first cylinder bank and a second cylinder bank; a variable valve apparatus mounted on the cylinder of the first cylinder bank to selectively deactivate the cylinder and changing operation phases of an intake valve and an exhaust valve; a main exhaust line to which a first exhaust line in which the exhaust gas from the cylinder of the first cylinder bank flows and a second exhaust line in which the exhaust gas from the cylinder of the second cylinder bank flows are joined; and a controller configured for controlling the cylinder of the first cylinder bank to be deactivated according to operation range of an engine, and the exhaust gas from the cylinder of the second cylinder bank to be re-circulated from the second exhaust line to the intake manifold through the first exhaust line and the cylinder of the first cylinder bank.Type: ApplicationFiled: November 28, 2017Publication date: April 18, 2019Applicants: Hyundai Motor Company, Kia Motors CorporationInventors: Jong Il PARK, Dong Hee HAN, II Joong HWANG, Hyungbok LEE, Seungwoo HONG, Nahm Roh JOO, Hyun Jun LIM
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Patent number: 10132252Abstract: An engine system may include an engine including first and second cylinder banks; a throttle valve; a first exhaust manifold gathering exhaust gas exhausted from the first cylinder bank to be supplied to the first exhaust line; a second exhaust manifold gathering exhaust gas exhausted from the second cylinder bank to be supplied to the second exhaust line; a turbocharger including a turbine rotated by the exhaust gas exhausted through the first exhaust manifold and a compressor rotated in connection with the turbine; a cylinder deactivation (CDA) device selectively deactivating the cylinders of the first cylinder bank; and a supercharger including a motor and an electric compressor operated by the motor.Type: GrantFiled: December 13, 2016Date of Patent: November 20, 2018Assignee: Hyundai Motor CompanyInventors: Jong Il Park, Dong Hee Han, Il Joong Hwang, Hyungbok Lee, Seungwoo Hong, Nahm Roh Joo, Hyun Jun Lim