发明申请
- 专利标题: NOX CONTROL DURING ENGINE IDLE-STOP OPERATIONS
- 专利标题(中): 发动机空转操作期间的NOX控制
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申请号: US13565454申请日: 2012-08-02
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公开(公告)号: US20140039781A1公开(公告)日: 2014-02-06
- 发明人: Joseph Robert Theis , James Michael Kerns , Michael James Uhrich , Giovanni Cavataio , Thomas G. Leone , Jeffrey Allen Doering , Todd Anthony Rumpsa
- 申请人: Joseph Robert Theis , James Michael Kerns , Michael James Uhrich , Giovanni Cavataio , Thomas G. Leone , Jeffrey Allen Doering , Todd Anthony Rumpsa
- 申请人地址: US MI Dearborn
- 专利权人: FORD GLOBAL TECHNOLOGIES, LLC
- 当前专利权人: FORD GLOBAL TECHNOLOGIES, LLC
- 当前专利权人地址: US MI Dearborn
- 主分类号: F01N3/18
- IPC分类号: F01N3/18 ; F01N3/10 ; F02D28/00
摘要:
Methods and systems are provided for improving engine exhaust emissions while enabling exhaust catalyst regeneration following an engine lean event. Prior to a VDE event, or prior to an engine idle-stop, ammonia is produced and stored on an exhaust underbody SCR catalyst. Then, during the engine restart after the VDE mode or the idle-stop, the stored ammonia is used to treat exhaust NOx species while an upstream exhaust underbody three-way catalyst is regenerated.
公开/授权文献
- US08862370B2 NOx control during engine idle-stop operations 公开/授权日:2014-10-14