公开(公告)号：US20180028966A1

公开(公告)日：2018-02-01

申请号：US15663457

申请日：2017-07-28

Applicant: Cummins Inc.

Inventor： Yuhui Zha ,  John K. Heichelbech ,  Michael J. Cunningham

IPC: B01D53/56 ,  F02M26/04 ,  B01J23/44 ,  F01N3/20 ,  B01J23/42

CPC classification number: B01D53/565 ,  B01D53/9454 ,  B01D53/9477 ,  B01D2251/2067 ,  B01D2255/1021 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/2065 ,  B01D2255/20723 ,  B01D2255/2073 ,  B01D2255/20738 ,  B01D2255/20761 ,  B01D2257/404 ,  B01D2257/702 ,  B01D2258/012 ,  B01D2258/018 ,  B01J23/42 ,  B01J23/44 ,  F01N3/20 ,  F02M26/04

Abstract: An aftertreatment system includes a first oxidation catalyst, a second oxidation catalyst, and a turbocharger. The first oxidation catalyst is upstream of the turbocharger and includes a first oxidation catalyst formulation. The second oxidation catalyst is downstream of the turbocharger and includes a second oxidation catalyst formulation different than the first oxidation catalyst formulation. The second oxidation catalyst formulation is configured to promote conversion of nitric oxide (NO) to nitrogen dioxide (NO2).

公开(公告)号：US20250116219A1

公开(公告)日：2025-04-10

申请号：US18983182

申请日：2024-12-16

Applicant: Cummins Inc.

Inventor： Di Wang ,  Richard J. Ancimer ,  Michael J. Cunningham ,  Aleksey Yezerets ,  Jinyong Luo ,  Yadan Tang ,  Yuhui Zha

IPC: F01N3/20 ,  B01J23/72 ,  B01J37/08 ,  F01N3/08

Abstract: A method includes providing a zeolite material including a plurality of active sites. The plurality of active sites are bound to a plurality of hydrogen ions. The method includes exchanging at least a portion of the plurality of hydrogen ions with a plurality of copper ions, thereby forming a first amount of Z2Cu active sites that include copper (Cu2+) ions bound to the zeolite material and a first amount of ZCuOH active sites bound to copper hydroxide ions bound to the zeolite material. The method includes heating the zeolite material to a heat treatment temperature for a predefined time period to transform the zeolite material into a heat treated zeolite material. The heat treated zeolite material includes a second amount of Z2Cu active sites greater than the first amount of Z2Cu active sites and a second amount of ZCuOH active sites less than the first amount of ZCuOH active sites.

公开(公告)号：US10022667B2

公开(公告)日：2018-07-17

申请号：US15663457

申请日：2017-07-28

Applicant: Cummins Inc.

Inventor： Yuhui Zha ,  John K Heichelbech ,  Michael J. Cunningham

IPC: F02M26/04 ,  F01N3/20 ,  B01D53/94 ,  B01D53/56 ,  B01J23/42 ,  B01J23/44

Abstract: An aftertreatment system includes a first oxidation catalyst, a second oxidation catalyst, and a turbocharger. The first oxidation catalyst is upstream of the turbocharger and includes a first oxidation catalyst formulation. The second oxidation catalyst is downstream of the turbocharger and includes a second oxidation catalyst formulation different than the first oxidation catalyst formulation. The second oxidation catalyst formulation is configured to promote conversion of nitric oxide (NO) to nitrogen dioxide (NO2).

公开(公告)号：US12168951B2

公开(公告)日：2024-12-17

申请号：US17235684

申请日：2021-04-20

Applicant: Cummins Inc.

Inventor： Di Wang ,  Richard J. Ancimer ,  Michael J. Cunningham ,  Aleksey Yezerets ,  Jinyong Luo ,  Yadan Tang ,  Yuhui Zha

IPC: F01N3/20 ,  B01J23/72 ,  B01J37/08 ,  F01N3/08

Abstract: Systems, apparatuses, and methods include predicting a sulfur exposure of one or more copper-zeolite catalysts deployed in an exhaust aftertreatment system; comparing the predicted sulfur exposure to a predefined sulfur exposure threshold; and responsive to the determination, heating the exhaust aftertreatment catalyst to a predefined heat treatment temperature for a predefined time period to desulfate the one or more copper-zeolite catalysts.

公开(公告)号：US20210324775A1

公开(公告)日：2021-10-21

申请号：US17235684

申请日：2021-04-20

Applicant: Cummins Inc.

Inventor： Di Wang ,  Richard J. Ancimer ,  Michael J. Cunningham ,  Aleksey Yezerets ,  Jinyong Luo ,  Yadan Tang ,  Yuhui Zha

IPC: F01N3/20 ,  F01N3/08 ,  B01J37/08 ,  B01J23/72

Abstract: Systems, apparatuses, and methods include predicting a sulfur exposure of one or more copper-zeolite catalysts deployed in an exhaust aftertreatment system; comparing the predicted sulfur exposure to a predefined sulfur exposure threshold; and responsive to the determination, heating the exhaust aftertreatment catalyst to a predefined heat treatment temperature for a predefined time period to desulfate the one or more copper-zeolite catalysts.