| 发明名称 |
AMMONIA STORAGE MANAGEMENT FOR SCR CATALYST |
| 摘要 |
Various systems and methods are described for managing ammonia storage in an SCR catalyst. In one example approach, a method comprises, in response to a vehicle-off event, injecting ammonia during a final exhaust blowdown until a predetermined value of ammonia is stored in the SCR catalyst; and in response to a subsequent vehicle-on event when an amount of ammonia stored in the SCR catalyst is less than the predetermined value, injecting ammonia until the predetermined value of ammonia is stored in the SCR catalyst. |
| 申请公布号 |
US2015013309(A1) |
申请公布日期 |
2015.01.15 |
| 申请号 |
US201313940150 |
申请日期 |
2013.07.11 |
| 申请人 |
Ford Global Technologies, LLC |
发明人 |
Upadhyay Devesh;Van Nieuwstadt Michiel J.;Lambert Christine Kay;Philion David Wynn |
| 分类号 |
F01N3/20 |
主分类号 |
F01N3/20 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method for an engine with an SCR catalyst, comprising:
in response to a vehicle-off event, injecting ammonia during a final exhaust blowdown until a predetermined value of ammonia is stored in the SCR catalyst; and in response to a subsequent vehicle-on event when an amount of ammonia stored in the SCR catalyst is less than the predetermined value, injecting ammonia until the predetermined value of ammonia is stored in the SCR catalyst. |
| 地址 |
Dearborn MI US |
