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公开(公告)号：US12098666B2
公开(公告)日：2024-09-24
申请号：US18134721
申请日：2023-04-14
CPC分类号： F01N3/2033 , F01N3/106 , F01N3/2013 , F01N3/2066 , F01N3/0814 , F01N3/103 , F01N3/208 , F01N3/36 , F01N9/002 , F01N11/002 , F01N2240/16 , F01N2370/04 , F01N2570/14 , F01N2610/03 , F01N2900/1404 , F01N2900/1602 , F01N2900/1811
摘要： A system includes: an engine; and an aftertreatment system for treating exhaust gas produced by the engine, the aftertreatment system including: an exhaust conduit configured to receive the exhaust gas and hydrocarbons from the engine; a preheating oxidation catalyst; a primary oxidation catalyst disposed downstream of the preheating oxidation catalyst; a selective catalytic reduction system disposed in the exhaust conduit downstream of the primary oxidation catalyst. The aftertreatment system includes: a controller configured to: determine a temperature of the exhaust gas at an inlet of the selective catalytic reduction system, and in response to the temperature of the exhaust gas at the inlet of the selective catalytic reduction system being below a threshold temperature, cause the engine to provide the hydrocarbons to the exhaust conduit. The preheating oxidation catalyst is configured to catalyze combustion of the hydrocarbons so as to increase the temperature of the exhaust gas to above the threshold temperature.
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公开(公告)号：US20240287928A1
公开(公告)日：2024-08-29
申请号：US18653126
申请日：2024-05-02
发明人： Matthew K. Volmerding , Varun Sood , Ramya vyas Arvind , James Zokoe, JR. , Ying Yuan , Yuying Song , Rayomand Dabhoiwala , Shirish S. Punde
IPC分类号： F01N13/00 , B01D53/94 , B01J29/072 , B01J35/00 , B01J35/56 , F01N3/035 , F01N3/10 , F01N3/20
CPC分类号： F01N13/009 , B01D53/9436 , B01D53/944 , B01D53/9472 , B01D53/9495 , B01J29/072 , B01J35/19 , B01J35/56 , F01N3/035 , F01N3/106 , F01N3/2066 , B01D2255/20738 , B01D2255/20761 , B01D2255/50 , B01D2255/9155 , B01D2257/302 , B01D2257/404 , B01D2257/406 , B01D2257/502 , B01D2257/702 , B01D2258/01 , F01N2510/065 , F01N2610/03 , F01N2610/1453
摘要： An aftertreatment system includes an upstream particulate filter, a decomposition chamber, a decomposition chamber dosing module, a first downstream catalyst member, and a downstream particulate filter. The decomposition chamber is positioned downstream of the upstream particulate filter. The decomposition chamber dosing module is coupled to the decomposition chamber and is configured to provide downstream treatment fluid into the decomposition chamber. The first downstream catalyst member is positioned downstream of the decomposition chamber and comprises a first downstream catalyst substrate configured to facilitate treatment of exhaust gas. The downstream particulate filter positioned downstream of the first downstream catalyst member.
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公开(公告)号：US20200378293A1
公开(公告)日：2020-12-03
申请号：US16970659
申请日：2018-02-19
摘要： A particulate filter for use in an exhaust aftertreatment system includes a ceramic substrate and an ash layer deposited atop the ceramic substrate. The ash layer has a uniform ash density of at least 0.4 g/L of the ceramic substrate. A method of depositing ash layers in a particulate filter of an exhaust aftertreatment system includes providing a ceramic substrate, preconditioning the ceramic substrate, depositing at least one ash layer atop the ceramic substrate during the preconditioning, monitoring uptake of soot into the particulate filter by measuring an increase in pressure drop across the particulate filter.
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公开(公告)号：US20230258115A1
公开(公告)日：2023-08-17
申请号：US18134721
申请日：2023-04-14
CPC分类号： F01N3/2033 , F01N3/106 , F01N3/2013 , F01N3/2066 , F01N2240/16 , F01N2370/04 , F01N2570/14 , F01N2610/03 , F01N2900/1404 , F01N3/103 , F01N3/36
摘要： A system includes: an engine; and an aftertreatment system for treating exhaust gas produced by the engine, the aftertreatment system including: an exhaust conduit configured to receive the exhaust gas and hydrocarbons from the engine; a preheating oxidation catalyst; a primary oxidation catalyst disposed downstream of the preheating oxidation catalyst; a selective catalytic reduction system disposed in the exhaust conduit downstream of the primary oxidation catalyst. The aftertreatment system includes: a controller configured to: determine a temperature of the exhaust gas at an inlet of the selective catalytic reduction system, and in response to the temperature of the exhaust gas at the inlet of the selective catalytic reduction system being below a threshold temperature, cause the engine to provide the hydrocarbons to the exhaust conduit. The preheating oxidation catalyst is configured to catalyze combustion of the hydrocarbons so as to increase the temperature of the exhaust gas to above the threshold temperature.
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公开(公告)号：US11661876B2
公开(公告)日：2023-05-30
申请号：US17642173
申请日：2020-09-03
CPC分类号： F01N3/2033 , F01N3/106 , F01N3/2013 , F01N3/2066 , F01N3/0814 , F01N3/103 , F01N3/208 , F01N3/36 , F01N2240/16 , F01N2370/04 , F01N2570/14 , F01N2610/03 , F01N2900/1404 , F01N2900/1811
摘要： An aftertreatment system for treating an exhaust gas comprises an exhaust conduit, a preheating oxidation catalyst, a primary oxidation catalyst disposed downstream of the preheating oxidation catalyst, and a selective catalytic reduction system disposed in the exhaust conduit downstream of the primary oxidation catalyst. A controller is configured to determine a temperature of an exhaust gas at an inlet of the selective catalytic reduction system. In response to the temperature being below a threshold temperature, the controller generates a hydrocarbon insertion signal configured to cause hydrocarbons to be inserted into or upstream of the preheating oxidation catalyst so as to increase a temperature of the exhaust gas to above the threshold temperature.
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公开(公告)号：US20220268193A1
公开(公告)日：2022-08-25
申请号：US17642173
申请日：2021-09-03
摘要： An aftertreatment system for treating an exhaust gas comprises an exhaust conduit, a preheating oxidation catalyst, a primary oxidation catalyst disposed downstream of the preheating oxidation catalyst, and a selective catalytic reduction system disposed in the exhaust conduit downstream of the primary oxidation catalyst. A controller is configured to determine a temperature of an exhaust gas at an inlet of the selective catalytic reduction system. In response to the temperature being below a threshold temperature, the controller generates a hydrocarbon insertion signal configured to cause hydrocarbons to be inserted into or upstream of the preheating oxidation catalyst so as to increase a temperature of the exhaust gas to above the threshold temperature.
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