Patent search ap:("Cummins Inc.") AND inv:"John K Heichelbech" Page 1

$Systems and methods for increasing nitrogen dioxide fraction in exhaust gas at low temperature$

1.

发明授权
Systems and methods for increasing nitrogen dioxide fraction in exhaust gas at low temperature 有权

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).

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