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公开(公告)号：US20240418113A1
公开(公告)日：2024-12-19
申请号：US18816735
申请日：2024-08-27
Applicant: Cummins Emission Solutions Inc.
Inventor： Shirish S. Punde , Rayomand Dabhoiwala , James Nicholas Reynolds
Abstract: An aftertreatment system for treating exhaust gas includes: an exhaust conduit configured to receive the exhaust gas; a preheating oxidation catalyst disposed in the exhaust conduit; a primary oxidation catalyst disposed in the exhaust conduit downstream of the preheating oxidation catalyst; a selective catalytic reduction system disposed in the exhaust conduit downstream of the primary oxidation catalyst; and 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 hydrocarbons to be provided to the preheating oxidation catalyst or to the exhaust conduit at a location upstream of the preheating oxidation catalyst. The preheating oxidation catalyst catalyzes 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：US12098666B2
公开(公告)日：2024-09-24
申请号：US18134721
申请日：2023-04-14
Applicant: Cummins Emission Solutions Inc.
Inventor： Shirish S. Punde , Rayomand Dabhoiwala , James Nicholas Reynolds
CPC classification number: 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
Abstract: 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：US20230258115A1
公开(公告)日：2023-08-17
申请号：US18134721
申请日：2023-04-14
Applicant: Cummins Emission Solutions Inc.
Inventor： Shirish S. Punde , Rayomand Dabhoiwala , James Nicholas Reynolds
CPC classification number: F01N3/2033 , F01N3/106 , F01N3/2013 , F01N3/2066 , F01N2240/16 , F01N2370/04 , F01N2570/14 , F01N2610/03 , F01N2900/1404 , F01N3/103 , F01N3/36
Abstract: 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
Applicant: Cummins Emission Solutions Inc.
Inventor： Shirish S. Punde , Rayomand Dabhoiwala , James Nicholas Reynolds
CPC classification number: 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
Abstract: 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
Applicant: Cummins Emission Solutions Inc.
Inventor： Shirish S. Punde , Rayomand Dabhoiwala , James Nicholas Reynolds
Abstract: 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.
