Method and device for monitoring the function of an exhaust-gas sensor
US9494073B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 7, 2011 |
| Grant date | Nov 15, 2016 |
| Priority date | — |
| Expiry date | Dec 14, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/123
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for monitoring the function of an exhaust-gas sensor in the exhaust duct of an internal combustion engine. A first function control of the exhaust-gas sensor takes place in a first operating point of the internal combustion engine, and in the case of an intact exhaust-gas sensor, the output signal of the exhaust gas sensor or a characteristic quantity derived therefrom is determined in at least one second operating point of the internal combustion engine in the case of an intact exhaust-gas sensor and stored as learned value, and the monitoring of the function of the exhaust-gas sensor during a subsequent operation of the internal combustion engine in the second operating point takes place by comparing the output signal of the exhaust-gas sensor or the characteristic quantity derived therefrom, with the learned value. A corresponding device for implementing the method is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.