公开(公告)号：US20140134054A1

公开(公告)日：2014-05-15

申请号：US14161153

申请日：2014-01-22

Applicant: Cummins Inc.

Inventor： Aleksey Yezerets ,  Zheng Liu ,  Neal W. Currier ,  J. Stephen Wills

IPC: F01N3/20

CPC classification number: F01N3/208 ,  F01N11/002 ,  F01N2560/06 ,  F01N2610/02 ,  F01N2610/1453 ,  F01N2900/12 ,  F01N2900/1602 ,  Y02T10/24 ,  Y02T10/47

Abstract: An aftertreatment system including a method which provides a selective catalytic reduction (SCR) catalyst disposed in an exhaust stream of an engine; determines that an ammonia pre-load condition for the SCR catalyst is present; determines a first amount of ammonia pre-load in response to the ammonia pre-load condition; injects an amount of ammonia or urea into the exhaust stream in response to the first amount of ammonia; and adsorbs a second amount of ammonia onto the SCR catalyst in response to injecting an amount of ammonia or urea, where the second amount of ammonia is either the injected amount of ammonia or an amount of ammonia resulting from hydrolysis from the injected amount of urea.

Abstract translation: 一种后处理系统，包括提供设置在发动机的排气流中的选择性催化还原（SCR）催化剂的方法; 确定存在用于SCR催化剂的氨预加载条件; 响应于氨预负荷状态确定氨预负载的第一量; 响应于第一量的氨将一定量的氨或尿素注入排气流中; 并且响应于注入一定量的氨或尿素而将第二量的氨吸附到SCR催化剂上，其中第二量的氨是从注射量的尿液中注入的氨的量或由水解产生的氨的量。

公开(公告)号：US09057309B2

公开(公告)日：2015-06-16

申请号：US14161153

申请日：2014-01-22

Applicant: Cummins Inc.

Inventor： Aleksey Yezerets ,  Zheng Liu ,  Neal W. Currier ,  J. Stephen Wills

IPC: F01N3/00 ,  F01N3/20 ,  F01N11/00

CPC classification number: F01N3/208 ,  F01N11/002 ,  F01N2560/06 ,  F01N2610/02 ,  F01N2610/1453 ,  F01N2900/12 ,  F01N2900/1602 ,  Y02T10/24 ,  Y02T10/47

Abstract: An aftertreatment system including a method which provides a selective catalytic reduction (SCR) catalyst disposed in an exhaust stream of an engine; determines that an ammonia pre-load condition for the SCR catalyst is present; determines a first amount of ammonia pre-load in response to the ammonia pre-load condition; injects an amount of ammonia or urea into the exhaust stream in response to the first amount of ammonia; and adsorbs a second amount of ammonia onto the SCR catalyst in response to injecting an amount of ammonia or urea, where the second amount of ammonia is either the injected amount of ammonia or an amount of ammonia resulting from hydrolysis from the injected amount of urea.

Abstract translation: 一种后处理系统，包括提供设置在发动机的排气流中的选择性催化还原（SCR）催化剂的方法; 确定存在用于SCR催化剂的氨预加载条件; 响应于氨预负荷状态确定氨预负载的第一量; 响应于第一量的氨将一定量的氨或尿素注入排气流中; 并且响应于注入一定量的氨或尿素而将第二量的氨吸附到SCR催化剂上，其中第二量的氨是从注射量的尿液中注入的氨的量或由水解产生的氨的量。