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公开(公告)号：US20200248606A1
公开(公告)日：2020-08-06
申请号：US16263508
申请日：2019-01-31
Applicant: Hyundai Motor Company , Hyundai Motor Company
Inventor： Nahm Roh Joo , Chang Hwan Kim , ChangHo Jung
Abstract: 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.
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公开(公告)号：US11035273B2
公开(公告)日：2021-06-15
申请号：US16263633
申请日：2019-01-31
Applicant: Hyundai Motor Company , KIA Motors Corporation
Inventor： Nahm Roh Joo , ChangHo Jung , Chang Hwan Kim , Dohyung Kim
Abstract: 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.
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公开(公告)号：US11371407B2
公开(公告)日：2022-06-28
申请号：US17207133
申请日：2021-03-19
Applicant: HYUNDAI MOTOR COMPANY , KIA Motors Corporation
Inventor： Nahm Roh Joo , Chang Hwan Kim , ChangHo Jung
Abstract: 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.
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公开(公告)号：US10465580B2
公开(公告)日：2019-11-05
申请号：US15367049
申请日：2016-12-01
Applicant: Hyundai Motor Company
Inventor： ChangHo Jung , Pyung Soon Kim
Abstract: An exhaust system may include first purification device disposed at a rear end portion of exhaust manifold and including Lean NOx Trap (LNT); second purification device disposed at rear end portion of the first purification device and including a diesel particulate filter (DPF); and a third purification device disposed at a rear end portion of the second purification device and including a selective catalytic reduction (SCR), wherein the DPF of the second purification device includes at least one inflow channel, at least one outflow channel, at least one wall disposed between the inflow channel and the outflow channel and extended in a longitudinal direction, and a support disposed inside of at least one of the inflow channel and the outflow channel, and at least one catalyst is coated on one of the inner wall of the inflow channel, the inner wall of the outflow channel, and the support.
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公开(公告)号：US10253673B1
公开(公告)日：2019-04-09
申请号：US16204783
申请日：2018-11-29
Applicant: Hyundai Motor Company , Kia Motors Corporation
Inventor： ChangHo Jung , Pyung Soon Kim
IPC: B01D53/34 , F01N9/00 , F01N13/00 , F01N3/022 , F01N3/08 , B01D53/94 , F01N3/035 , F01N11/00 , B01D46/00 , F01N3/025 , F01N3/20 , B01J38/00
Abstract: A regeneration method of an apparatus of purifying an exhaust gas including a catalytic converter which is disposed on an exhaust pipe and includes a lean NOx trap (LNT) device in which a first LNT catalyst is coated and a catalyzed particulate filter (CPF) in which a second LNT catalyst is coated may include determining whether a nitrogen oxide (NOx) amount absorbed in the LNT device is greater than a threshold NOx amount, determining whether a temperature of the LNT device is higher than a first predetermined temperature when the NOx amount absorbed in the LNT device is greater than the threshold NOx amount, and regenerating, both of the LNT device and the CPF or only the LNT device according to a temperature of the CPF when the temperature of the LNT device is higher than the first predetermined temperature.
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公开(公告)号：US10041391B2
公开(公告)日：2018-08-07
申请号：US15299007
申请日：2016-10-20
Applicant: HYUNDAI MOTOR COMPANY
Inventor： ChangHo Jung , Pyung Soon Kim
Abstract: An apparatus includes a catalytic converter on an exhaust pipe and provided with a lean NOx trap (LNT) device coated with an LNT catalyst, and a catalyzed particulate filter (CPF) coated with a catalyst. The LNT device and CPF are sequentially disposed in the catalytic converter. The CPF includes at least one inlet channel, extending in a longitudinal direction, having a first end into which fluid flows and a blocked second end; at least one outlet channel, extending in the longitudinal direction, having a blocked first end and a second end through which the fluid flows out; at least one porous wall defining a boundary between neighboring inlet and outlet channels and that extends in the longitudinal direction; and a support coated with the catalyst and located within at least one among the at least one inlet channel and the at least one outlet channel.
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公开(公告)号：US20170167335A1
公开(公告)日：2017-06-15
申请号：US15347979
申请日：2016-11-10
Applicant: Hyundai Motor Company
Inventor： Pyung Soon KIM , ChangHo Jung
CPC classification number: F01N3/035 , B01D53/9418 , B01D53/9422 , B01D53/944 , B01D53/9472 , B01D2255/9035 , B01D2255/904 , B01D2255/9155 , B01J35/04 , B01J37/0215 , F01N3/0211 , F01N3/0821 , F01N3/0842 , F01N3/2066
Abstract: A catalyzed particulate filter may include at least one inlet channel extending in a longitudinal direction, and having a first end into which fluid flows and a second end which is blocked; at least one outlet channel extending in a longitudinal direction, and having a first end which is blocked and a second end through which the fluid flows out; at least one wall that defines the boundary between adjacent inlet and outlet channels and that extends in a longitudinal direction; and at least one support positioned within at least one of the at least one inlet channel and the at least one outlet channel.
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公开(公告)号：US10914217B2
公开(公告)日：2021-02-09
申请号：US16263508
申请日：2019-01-31
Applicant: Hyundai Motor Company
Inventor： Nahm Roh Joo , Chang Hwan Kim , ChangHo Jung
Abstract: 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.
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公开(公告)号：US10830118B2
公开(公告)日：2020-11-10
申请号：US16263615
申请日：2019-01-31
Applicant: Hyundai Motor Company , KIA Motors Corporation
Inventor： Nahm Roh Joo , ChangHo Jung , Chang Hwan Kim , Seung Jae Yi
Abstract: 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.
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公开(公告)号：US20200248604A1
公开(公告)日：2020-08-06
申请号：US16263537
申请日：2019-01-31
Applicant: Hyundai Motor Company , KIA Motors Corporation
Inventor： Nahm Roh Joo , Chang Hwan Kim , ChangHo Jung
Abstract: 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.
