Procedure to calibrate a signal supplied by a lambda sensor and device to implement the procedure
US7584642B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2006 |
| Grant date | Sep 8, 2009 |
| Priority date | — |
| Expiry date | Feb 29, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/2474
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A procedure for the calibration of the lambda measuring signal supplied by the wideband lambda sensor, which is disposed in the exhaust gas area of an internal combustion engine, and a device to implement the procedure are proposed. During the procedure, a correction value is used to ascertain a unit of measurement for the lambda actual value, whereby the correction value is ascertained during a specified operating state of the internal combustion engine, in which no fuel metering occurs and the engine rotational speed of the internal combustion engine lies above a threshold value. The correction value—is ascertained as a function of the sensor temperature of the wideband lambda sensor during a specified operating state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.