公开(公告)号：US20150247437A1

公开(公告)日：2015-09-03

申请号：US14453169

申请日：2014-08-06

Applicant: Cummins Inc.

Inventor： Richard J. Ancimer ,  Mert Geveci ,  Michael Haas ,  Alok Joshi ,  Krishna Kamasamudram

IPC: F01N3/20 ,  F01N3/035 ,  F01N13/00

CPC classification number: F01N3/2066 ,  F01N3/035 ,  F01N3/103 ,  F01N3/106 ,  F01N3/2006 ,  F01N3/2033 ,  F01N13/009 ,  F01N2610/02 ,  Y02T10/24 ,  Y02T10/26

Abstract: Systems and methods for managing aftertreatment systems that include passive NOx adsorption devices and SCR catalyst elements are disclosed. Temperature generation devices upstream of the passive NOx adsorption devices facilitate control of the aftertreatment systems to improve fuel economy and NOx conversion efficiency.

Abstract translation: 公开了用于管理包括被动式NOx吸附装置和SCR催化剂元件的后处理系统的系统和方法。 无源NOx吸附装置上游的温度发生装置便于后处理系统的控制，以提高燃料经济性和NOx转化效率。

公开(公告)号：US08986620B2

公开(公告)日：2015-03-24

申请号：US14273019

申请日：2014-05-08

Applicant: Cummins Inc.

Inventor： Xu Chen ,  Krishna Kamasamudram ,  Neil W. Currier ,  Aleksey Yezerets

IPC: B01J38/02 ,  B01D53/96 ,  B01J29/90 ,  B01J29/072

CPC classification number: B01D53/96 ,  B01J29/072 ,  B01J29/90 ,  B01J38/02

Abstract: An example method includes determining that a selective catalytic reduction (SCR) component having a zeolite-based catalyst is contaminated with platinum (Pt). The method further includes elevating the temperature of the SCR component to at least 600° C. in response to the determining the catalytic component is contaminated with Pt, and maintaining the elevated temperature of the catalytic component for a predetermined time period thereby restoring reduction activity of the catalyst.

Abstract translation: 示例性方法包括确定具有沸石基催化剂的选择性催化还原（SCR）组分被铂（Pt）污染。 该方法还包括响应于确定催化组分被Pt污染并将催化组分的升高温度保持预定时间段，将SCR组分的温度升高至至少600℃，由此恢复还原活性 催化剂。