Methods and systems for adjusting EGR based on an impact of PCV hydrocarbons on an intake oxygen sensor
US9441564B2 · kind B2 · utility
13Cited by
16References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 14, 2014 |
| Grant date | Sep 13, 2016 |
| Priority date | — |
| Expiry date | Jan 2, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.