| 发明名称 | Methods and systems for adjusting EGR based on an impact of PCV hydrocarbons on an intake oxygen sensor | ||
| 摘要 | Methods and systems are provided for estimating an impact of PCV hydrocarbons on an output of an intake oxygen sensor. In one example, a method may include disabling EGR flow when the impact of PCV hydrocarbons on the output of the intake oxygen sensor is above a threshold. The impact of the PCV hydrocarbons on the output of the intake oxygen sensor may be based on a difference between the output of the intake oxygen sensor and a DPOV sensor when EGR is flow and a difference between the output of the intake oxygen sensor and expected blow-by when EGR is not flowing. | ||
| 申请公布号 | US9441564(B2) | 申请公布日期 | 2016.09.13 |
| 申请号 | US201414252693 | 申请日期 | 2014.04.14 |
| 申请人 | Ford Global Technologies, LLC | 发明人 | Surnilla Gopichandra;Hilditch James Alfred;Smith Stephen B.;Shelby Michael Howard;Rumpsa Todd Anthony;Hakeem Mohannad |
| 分类号 | F01N11/00;F02D41/00;F02D41/14;F01N3/20;F02M25/08;F02D21/08 | 主分类号 | F01N11/00 |
| 代理机构 | Alleman Hall McCoy Russell & Tuttle LLP | 代理人 | Voutyras Julia;Alleman Hall McCoy Russell & Tuttle LLP |
| 主权项 | 1. An engine method, comprising: disabling EGR flow responsive to an impact of PCV flow hydrocarbons on an output of an intake oxygen sensor increasing above a threshold when purge flow is disabled, the impact of PCV flow hydrocarbons based on a difference between a first EGR flow estimate based on the output of the intake oxygen sensor and a second EGR flow estimate based on an output of a DPOV sensor when EGR is flowing. | ||
| 地址 | Dearborn MI US | ||