Method for performing a diagnostic on an exhaust gas analyzer probe disposed in the exhaust system of an internal combustion engine and device for implementing the method
US8087291B2 · kind B2 · utility
2Cited by
2References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2009 |
| Grant date | Jan 3, 2012 |
| Priority date | — |
| Expiry date | Feb 16, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/123
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for performing a diagnostic on an exhaust gas analyzer probe disposed in the exhaust system of an internal combustion engine, and a device for implementing the method are provided. The method performs the evaluation of the exhaust gas analyzer probe after recognition of a special operating phase, e.g., an overrun phase, of the internal combustion engine by setting off a specifiable injection that is torque-neutral or not perceptible for the operator, on the basis of the predicted probe signal pattern and taking into account the delay time of the probe signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.