| 发明名称 |
METHODS AND SYSTEMS FOR PCV FLOW ESTIMATION WITH AN INTAKE OXYGEN SENSOR |
| 摘要 |
Methods and systems are provided for estimating a positive crankcase ventilation (PCV) flow based on outputs of an intake manifold oxygen sensor. For example, during engine operation when exhaust gas recirculation (EGR) and fuel canister purge are disabled, PCV flow may be estimated based on a difference between a first output of the sensor with boost enabled and a second output of the sensor with boost disabled. Then, during subsequent operation wherein EGR is enabled, PCV flow is enabled, and purge is disabled, a third output of the sensor may be adjusted based on the estimated PCV flow. |
| 申请公布号 |
US2015121864(A1) |
申请公布日期 |
2015.05.07 |
| 申请号 |
US201314073480 |
申请日期 |
2013.11.06 |
| 申请人 |
Ford Global Technologies, LLC |
发明人 |
Surnilla Gopichandra;Hilditch James Alfred;Gerhart Matthew John;Chesney Lynn Aimee;Smith Stephen B. |
| 分类号 |
F02D41/00 |
主分类号 |
F02D41/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method for an engine, comprising:
during operation with EGR flowing, adjusting an EGR valve based on an output of an intake oxygen sensor and PCV flow, the PCV flow identified during previous operation with EGR and purge disabled based on outputs of the intake oxygen sensor with and without boost. |
| 地址 |
Dearborn MI US |
