| 主权项 |
1. A method for calibrating an exhaust gas sensor, wherein the exhaust gas sensor is arranged in a measurement chamber in an exhaust channel of an internal combustion engine, the measurement chamber including two perforated cylinders arranged concentrically one inside the other, at least one of the two perforated cylinders being movable about a longitudinal axis thereof so that the two cylinders form a screening device with a variable screening effect, the two perforated cylinders each have at least two bores in cylinder walls of the two perforated cylinders, wherein the two perforated cylinders are movable from a non-aligned position into an aligned position to open the measurement chamber to inflowing exhaust gas, the method comprising:
displacing, at a start of a calibration phase, exhaust gas present in the measurement chamber by filling the measurement chamber with a calibration gas; and introducing exhaust gas into the measurement chamber at an end of the calibration phase by moving the two perforated cylinders into the aligned position. |
