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公开(公告)号：US10808588B2
公开(公告)日：2020-10-20
申请号：US16263558
申请日：2019-01-31
发明人： Nahm Roh Joo , ChangHo Jung , Chang Hwan Kim , Dohyung Kim
摘要： 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.
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公开(公告)号：US10799854B2
公开(公告)日：2020-10-13
申请号：US15591460
申请日：2017-05-10
发明人： Pyung Soon Kim , Chang Hwan Kim , ChangHo Jung
IPC分类号： B01J35/00 , B01J37/02 , B01D53/94 , B01J29/80 , B01J29/76 , B01J35/04 , C01B39/14 , B01J37/08 , B01J37/30 , F01N3/035 , F01N3/20
摘要： Provided herein is an exhaust system comprising a diesel particulate filter coated with a selective catalytic reduction (SDPF) wherein the SCR is coated with a Cu/LTA catalyst comprising a LTA zeolite that includes copper ions and the SCR is coated on a high pore diesel particulate matter filter, wherein a ratio of copper and aluminum is from about 0.14 to about 0.48, and wherein the Si/Al ratio of the LTA zeolite is from about 8 to about 100.
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公开(公告)号：US20200248608A1
公开(公告)日：2020-08-06
申请号：US16263615
申请日：2019-01-31
发明人： Nahm Roh Joo , ChangHo Jung , Chang Hwan Kim , Seung Jae Yi
摘要： 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：US20200248607A1
公开(公告)日：2020-08-06
申请号：US16263558
申请日：2019-01-31
发明人： Nahm Roh Joo , ChangHo Jung , Chang Hwan Kim , Dohyung Kim
摘要： 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.
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公开(公告)号：US20200248605A1
公开(公告)日：2020-08-06
申请号：US16263633
申请日：2019-01-31
发明人： Nahm Roh Joo , ChangHo Jung , Chang Hwan Kim , Dohyung Kim
摘要： 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：US20200248603A1
公开(公告)日：2020-08-06
申请号：US16263484
申请日：2019-01-31
发明人： Nahm Roh Joo , Chang Hwan Kim , ChangHo Jung
摘要： 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：US10443464B2
公开(公告)日：2019-10-15
申请号：US15371021
申请日：2016-12-06
发明人： Jin Woo Choung , Chang Hwan Kim , SungJae Kim , SooMin Lee
摘要： A catalyst oxygen purge control method may include a catalyst oxygen purge control method during a cold engine period of a catalyst oxygen purge control apparatus which includes a three way catalytic converter through which an exhaust gas combusted when air and fuel are mixed in a combustion chamber is exhausted and the exhaust gas passes, wherein the method includes determining whether a fuel cut condition of an injector which injects the fuel to the combustion chamber is satisfied, performing fuel cut of the injector when the fuel cut condition is satisfied, measuring an oxygen storage capacity of the three way catalyst, and adjusting an oxygen purge time based on the measured oxygen storage capacity.
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公开(公告)号：US11465133B2
公开(公告)日：2022-10-11
申请号：US17009235
申请日：2020-09-01
发明人： Pyung Soon Kim , Young Jin Kim , Chang Hwan Kim , Seung Chui Na , Seung Ho Oh , Young San Yoo , Ho Dong Kim
IPC分类号： B01J29/76 , B01J29/63 , B01J35/10 , B01J35/04 , B01J37/00 , B01J37/02 , B01J37/30 , B01J37/04 , B01J37/10 , B01D53/94 , B01J35/02 , C01B39/14 , B01J37/03 , B01J29/04
摘要： Disclosed is a method of preparing a high-performance zeolite catalyst for reducing nitrogen oxide emissions, and more particularly a technique for preparing a zeolite catalyst, suitable for use in effectively removing nitrogen oxide (NOx), among exhaust gases emitted from vehicle internal combustion engines through selective catalytic reduction (SCR), thereby exhibiting high efficiency, high chemical stability and high thermal durability upon SCR using the prepared catalyst.
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公开(公告)号：US11305266B2
公开(公告)日：2022-04-19
申请号：US16887163
申请日：2020-05-29
发明人： Young Jin Kim , Chang Hwan Kim , Pyung Soon Kim , Eunseok Kim , Yong Sul Kim
IPC分类号： B01J29/80 , B01J29/76 , B01J37/02 , B01J37/04 , B01J37/30 , B01J35/00 , B01J29/56 , B01J37/10 , B01J29/072 , B01J29/06 , B01D53/86 , B01D53/94
摘要： The present disclosures relate to a catalyst for removing a nitrogen oxide and a manufacturing method thereof, and the catalyst for removing the nitrogen oxide includes: a first catalyst that includes a zeolite support containing copper and having a first framework; and a second catalyst that is physically mixed with the first catalyst and includes a zeolite support containing copper and having a second framework different from the first framework.
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公开(公告)号：US11125173B2
公开(公告)日：2021-09-21
申请号：US16550732
申请日：2019-08-26
发明人： Hyokyung Lee , Chang Hwan Kim
IPC分类号： F02D41/06 , B01D53/94 , B01J23/44 , B01J23/46 , B01J35/00 , F01N3/08 , F01N3/10 , F02D41/02 , F01N13/00 , F01N11/00
摘要： An exhaust gas purification system for vehicle includes: a housing disposed on an exhaust pipe to receive a exhaust gas discharged from an engine and to exhaust the exhaust gas passed rearward; a front end catalyst disposed in the housing to purify the exhaust gas flowing into the housing through a front end of the housing; a rear end catalyst disposed in the housing to purify the exhaust gas passing through the front end catalyst before the exhaust gas flows out to a rear end of the housing; and a controller connected to the exhaust pipe at a front end of the housing to control a concentration of unburned fuel contained in the exhaust gas flowing into the housing.
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