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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
发明人： Nahm Roh Joo , Chang Hwan Kim , ChangHo Jung
摘要： 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：US11499465B2
公开(公告)日：2022-11-15
申请号：US17196316
申请日：2021-03-09
发明人： Hyokyung Lee , Chang Hwan Kim
摘要： A vehicle exhaust gas purification system and a control method thereof that may effectively remove nitrogen oxides in an exhaust gas even in a cold state, which is the initial stage of an engine starting, is disclosed. A control method of an exhaust gas purification system of a vehicle may include: a step of performing a rich control for controlling a concentration of non-combusted fuel contained in the exhaust gas flowing into the housing to be a rich fuel directly after the starting of the engine; a step of performing a lean control for controlling the concentration of the non-combusted fuel contained in the exhaust gas flowing into the housing to be a lean fuel; a step of determining whether a temperature of the exhaust gas flowing into the housing is a predetermined temperature or more; and a step of performing a normal control for controlling the concentration of the non-combusted fuel contained in the exhaust gas flowing into the housing so that a lean fuel and a rich fuel are periodically repeated with a regular interval.
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公开(公告)号：US10883432B2
公开(公告)日：2021-01-05
申请号：US16698144
申请日：2019-11-27
发明人： Hyokyung Lee , Chang Hwan Kim
摘要： An exhaust gas purification system for vehicle provided on an exhaust pipe connected to an exhaust side of an engine for purifying an exhaust gas of the engine includes a housing mounted on the exhaust pipe, a front end catalyst incorporated in the housing to primarily purify the exhaust gas flowing into the housing through the front end portion of the housing, a rear end catalyst incorporated in the housing to secondarily purify the exhaust gas passing through the front end catalyst before the exhaust gas flows out to the rear end portion of the housing, and a controller connected to the exhaust pipe at a front end portion of the housing to control the concentration of unburned fuel contained in the exhaust gas according to temperature of exhaust gas flowing into the housing and speed of the vehicle.
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公开(公告)号：US11826737B2
公开(公告)日：2023-11-28
申请号：US17559732
申请日：2021-12-22
发明人： Pyung Soon Kim , Young Jin Kim , Chang Hwan Kim , Seung Chul Na , Seung Ho Oh , Young San Yoo , Ho Dong Kim
IPC分类号： B01J29/072 , B01J29/63 , B01J35/10 , B01J35/04 , B01J37/00 , B01J37/02 , B01J37/30 , B01J37/04 , B01J37/10 , B01D53/94 , B01J35/02 , C01B39/14 , B01J29/76 , B01J37/03
CPC分类号： B01J29/63 , B01D53/9418 , B01J29/7607 , B01J35/023 , B01J35/026 , B01J35/04 , B01J35/1023 , B01J37/0018 , B01J37/0203 , B01J37/0209 , B01J37/038 , B01J37/04 , B01J37/10 , B01J37/30 , C01B39/145 , B01D2255/20761 , B01D2255/50 , B01D2255/9155 , B01D2255/9207 , B01D2257/404 , B01D2258/01 , B01D2258/012 , B01J2229/186 , B01J2229/34 , B01J2229/36 , B01J2229/38
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：US11666887B2
公开(公告)日：2023-06-06
申请号：US17360418
申请日：2021-06-28
发明人： Chun Yong Kang , Chang Hwan Kim , Jungkyu Choi , Eun-Hee Jang , Jin Seong Kim , Hwiyoon Noh , La Young Choi
CPC分类号： B01J20/186 , B01J20/0207 , B01J20/28011 , B01J20/28016 , B01J20/28083 , B01J20/3078 , B01J20/3293 , B01J2220/42
摘要： A hydrocarbon adsorbent includes a core-shell particle including a core and a shell surrounding the core, wherein the core includes ion-exchanged zeolite that is ion-exchanged with a metal other than silicon (Si) and aluminum (Al) and the shell includes a mesoporous metal oxide.
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公开(公告)号：US20220297509A1
公开(公告)日：2022-09-22
申请号：US17522775
申请日：2021-11-09
发明人： Ji Wan Son , Chang Hwan Kim , Sang Hun Lee , Tae Woong Lim , Jin Sung Kim
IPC分类号： B60H1/32
摘要： A compressor control apparatus and method includes: a sensor configured to detect air conditioner operation state information necessary to control engagement and disengagement of a clutch of an air conditioner compressor; an electromagnetic coil in the clutch of the air conditioner compressor configured to perform clutch engagement upon receiving battery current; a microcomputer configured to determine whether the current air conditioner operation state satisfies a clutch engagement allowance condition or a clutch disengagement condition based on the air conditioner operation state information detected by the sensor and to output an operation signal based on the result of determination; and a switch configured to be turned on or off according to the operation signal output by the microcomputer and to control supply of the battery current to the electromagnetic coil such that clutch engagement or clutch disengagement is performed.
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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
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：US10981153B2
公开(公告)日：2021-04-20
申请号：US16688685
申请日：2019-11-19
发明人： Suk Bong Hong , Donghui Jo , Taekyung Ryu , Gi Tae Park , In-Sik Nam , Pyung Soon Kim , Chang Hwan Kim
IPC分类号： B01J29/06 , B01J29/76 , B01D53/94 , B01J37/02 , C01B39/14 , C01B39/02 , B01J29/80 , B01J29/072 , B01J35/00 , B01J35/04 , B01J37/04 , B01J37/08 , B01J37/30 , F01N3/20
摘要： A catalyst includes LTA zeolite including copper ions, wherein a Si/Al ratio of the LTA zeolite is 2 to 50. The catalyst is coated on a honeycomb carrier or a filter. The catalyst removes NOx from a reaction gas at 100° C. or above. The catalyst has an NOx conversion rate of 80% at 450° C. or above.
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公开(公告)号：US10760461B2
公开(公告)日：2020-09-01
申请号：US16566619
申请日：2019-09-10
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：US20200271067A1
公开(公告)日：2020-08-27
申请号：US16550732
申请日：2019-08-26
发明人： Hyokyung LEE , Chang Hwan Kim
IPC分类号： F02D41/06 , F01N13/00 , F02D41/02 , F01N11/00 , F01N3/10 , F01N3/08 , B01D53/94 , B01J23/44 , B01J23/46 , B01J35/00
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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