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1.发明申请公开(公告)号：US20200165950A1
公开(公告)日：2020-05-28
申请号：US16199421
申请日：2018-11-26
发明人： Thomas M. HARRIS
摘要： An exhaust after-treatment system that is configured to treat an exhaust produced by an engine, and includes a bypass passage including an inlet for receiving an amount of the exhaust from an exhaust passage. A first exhaust treatment component is located within the bypass passage, and a valve is located proximate the bypass passage that is configured to control the amount of the exhaust that enters the inlet of the bypass passage. A second exhaust treatment component is located in the exhaust passage downstream from the inlet of the bypass passage, wherein an outlet of the bypass passage communicates the exhaust treated by the first exhaust treatment component back to the exhaust passage at a location that is downstream from the second exhaust treatment component such that the exhaust treated by the first exhaust treatment component does not interact with the second exhaust treatment component.
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公开(公告)号：US20230010915A1
公开(公告)日：2023-01-12
申请号：US17752183
申请日：2022-05-24
摘要： An exhaust control system for a vehicle includes a temperature sensor positioned downstream of an exhaust burner and upstream of an SCR catalyst in an exhaust system. The temperature sensor is configured to generate a measurement signal indicative a temperature of exhaust flowing through the exhaust system at an outlet of a DPF positioned downstream of the exhaust burner. An exhaust control module is configured to turn the exhaust burner on to heat the exhaust, monitor the temperature of the exhaust based on the measurement signal, subsequent to turning the exhaust burner on, turn the exhaust burner off based on an upper threshold temperature of the exhaust, and, subsequent to turning the exhaust burner off, turn the exhaust burner on based on a lower threshold temperature of the exhaust. The lower threshold temperature is less than the upper threshold temperature.
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3.发明公开公开(公告)号：US20230383681A1
公开(公告)日：2023-11-30
申请号：US17824229
申请日：2022-05-25
IPC分类号： F01N3/20 , F01N3/10 , F01N3/28 , F01N3/36 , B01J35/04 , B01J23/42 , B01D53/94 , B01D39/12 , B01D46/24 , B01D46/52
CPC分类号： F01N3/2033 , F01N3/2066 , F01N3/101 , F01N3/2828 , F01N3/2842 , F01N3/36 , B01J35/04 , B01J23/42 , B01D53/9418 , B01D39/12 , B01D46/2403 , B01D46/521 , B01D53/945 , B01D53/9477 , F01N2370/02 , F01N2610/1453 , B01D2239/1208 , B01D2279/30 , B01D2255/9155 , B01D2255/908 , B01D2255/102
摘要： A vehicle exhaust system including an exhaust pipe section, a selective catalytic reduction (SCR) catalyst, and a burner assembly, connected to the exhaust pipe section at a position upstream of the selective catalytic reduction (SCR) catalyst, for pre-heating the exhaust system prior to engine start-up. The burner assembly includes a burner with a combustion chamber and a connecting tube that extends between the burner and the exhaust pipe section. A metallic mesh filter element is located inside the connecting tube and/or a catalytic washcoat is disposed on an inner surface of the connecting tube to reduce emissions of the burner assembly at start-up. The catalytic washcoat comprises a mixture of a support material and a catalyst material that chemically reacts with emissions generated by the burner to reduce the amount of burner produced emissions released from the exhaust system during pre-heating.
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公开(公告)号：US20180171857A1
公开(公告)日：2018-06-21
申请号：US15386126
申请日：2016-12-21
IPC分类号： F01N13/14 , C04B35/16 , C04B35/626 , C04B35/64
CPC分类号： F01N13/148 , C04B28/26 , C04B38/0064 , C04B2111/00793 , C04B2111/28 , F01N2310/12 , C04B14/18 , C04B14/324 , C04B40/0263 , C04B14/305 , C04B38/007
摘要： The present disclosure provides a method of producing an insulation preform having graded porosity for an exhaust treatment component of a vehicle. The method includes obtaining a first granular insulating material having a first diameter, a second granular insulating material having a second diameter less than the first diameter, an inorganic binder, and water. The method further includes producing a slurry comprising the first granular insulating material, the second granular insulating material, the inorganic binder, and water. The slurry is introduced into a mold having at least one surface adapted for vacuum extraction. A liquid phase of the slurry is evacuated from the mold using vacuum extraction to produce a moist preform. The moist preform has graded porosity such that a greater concentration of the second insulation material is adjacent to the at least one surface than the first insulating material. The moist preform is heated to produce the insulation preform.
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