Methods and systems for estimating ambient pressure using an oxygen sensor
US9926872B2 · kind B2 · utility
2Cited by
8References
20Claims
0Family size
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Key dates
| Filing date | Jan 15, 2016 |
| Grant date | Mar 27, 2018 |
| Priority date | — |
| Expiry date | Oct 15, 2036 |
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 leveraging the pressure dependency of an oxygen sensor for estimating an engine ambient pressure. An intake or exhaust oxygen sensor is used for ambient pressure estimation by applying a reference voltage to the sensor while the engine is being pulled-down in a hybrid vehicle, and correcting an output of the sensor for dilution effects due to ambient humidity. The estimated ambient pressure is used to correct or confirm pressure estimated by other sources, such as other pressure sensors or a pressure model, as well as to tune the performance of the engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.