公开(公告)号：US20150240686A1

公开(公告)日：2015-08-27

申请号：US14188876

申请日：2014-02-25

Applicant: Cummins Inc.

Inventor： Jennifer Kay Light-Holets ,  C. Larry Bruner ,  Dan Langenderfer

IPC: F01N3/20

CPC classification number: F01N3/208 ,  F01N3/2066 ,  F01N2240/36 ,  F01N2570/14 ,  F01N2570/18 ,  F01N2610/00 ,  F01N2610/02 ,  F01N2610/03 ,  F01N2900/1404 ,  F01N2900/1616 ,  Y02T10/24

Abstract: Systems, methods and apparatus are disclosed for thermal management of an SCR catalyst in an exhaust aftertreatment system of an internal combustion engine that includes an exhaust throttle but lacks a particulate filter. The thermal management can include interpreting, initiating, and/or completing a thermal management event for the SCR catalyst for removal of contaminants such as hydrocarbons and urea deposits. The thermal management event includes at least one of closing the exhaust throttle and increasing the thermal output of the engine to expose the SCR catalyst to a sufficiently high temperature over a time period that desorbs a sufficient amount of the hydrocarbons and/or removes a sufficient amount of the urea deposits to restore SCR catalyst performance.

Abstract translation: 公开了用于内燃机的排气后处理系统中的SCR催化剂的热管理的系统，方法和装置，其包括排气节流阀，但缺少微粒过滤器。 热管理可以包括解释，启动和/或完成用于SCR催化剂的热管理事件以去除诸如碳氢化合物和尿素沉积物之类的污染物。 热管理事件包括关闭排气节流阀和增加发动机的热输出中的至少一个，以使SCR催化剂在足以释放足够量的烃的时间段内暴露于足够高的温度和/或去除足够的量 的尿素沉淀以恢复SCR催化剂性能。

公开(公告)号：US09212587B2

公开(公告)日：2015-12-15

申请号：US14188876

申请日：2014-02-25

Applicant: Cummins Inc.

Inventor： Jennifer Kay Light-Holets ,  C. Larry Bruner ,  Dan Langenderfer

IPC: F01N3/00 ,  F01N3/20

CPC classification number: F01N3/208 ,  F01N3/2066 ,  F01N2240/36 ,  F01N2570/14 ,  F01N2570/18 ,  F01N2610/00 ,  F01N2610/02 ,  F01N2610/03 ,  F01N2900/1404 ,  F01N2900/1616 ,  Y02T10/24

Abstract: Systems, methods and apparatus are disclosed for thermal management of an SCR catalyst in an exhaust aftertreatment system of an internal combustion engine that includes an exhaust throttle but lacks a particulate filter. The thermal management can include interpreting, initiating, and/or completing a thermal management event for the SCR catalyst for removal of contaminants such as hydrocarbons and urea deposits. The thermal management event includes at least one of closing the exhaust throttle and increasing the thermal output of the engine to expose the SCR catalyst to a sufficiently high temperature over a time period that desorbs a sufficient amount of the hydrocarbons and/or removes a sufficient amount of the urea deposits to restore SCR catalyst performance.

Abstract translation: 公开了用于内燃机的排气后处理系统中的SCR催化剂的热管理的系统，方法和装置，其包括排气节流阀，但缺少微粒过滤器。 热管理可以包括解释，启动和/或完成用于SCR催化剂的热管理事件以去除诸如碳氢化合物和尿素沉积物之类的污染物。 热管理事件包括关闭排气节流阀和增加发动机的热输出中的至少一个，以使SCR催化剂在足以释放足够量的烃的时间段内暴露于足够高的温度和/或去除足够的量 的尿素沉淀以恢复SCR催化剂性能。