| 发明名称 |
TWO-STAGE CATALYST REGENERATION |
| 摘要 |
A system and method are described for reducing NOx emissions following deceleration fuel shut off (DFSO). The method comprises: cutting off fuel to the engine during a deceleration event; open loop operating the engine air/fuel ratio rich of stoichiometry for a predetermined time after the deceleration event; feedback controlling the air/fuel ratio on average near a value rich of stoichiometry for a preselected time after said predetermined time; and feedback controlling the air/fuel ratio returning to stoichiometry after the preselected time. |
| 申请公布号 |
US2015051812(A1) |
申请公布日期 |
2015.02.19 |
| 申请号 |
US201313967911 |
申请日期 |
2013.08.15 |
| 申请人 |
Ford Global Technologies, LLC |
发明人 |
Santillo Mario;Jankovic Mrdjan J.;Magner Steve William;Uhrich Michael James |
| 分类号 |
F02D41/12 |
主分类号 |
F02D41/12 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method for controlling an engine, comprising:
cutting off fuel to the engine during a deceleration event; open loop operating an engine air/fuel ratio rich of stoichiometry for a predetermined time after said deceleration event; feedback controlling said air/fuel ratio on average around a value rich of stoichiometry for a preselected time after said predetermined time; and feedback controlling said air/fuel ratio to gradually return to stoichiometry after said preselected time. |
| 地址 |
Dearborn MI US |
