Method and device for the calibration of an exhaust gas...

Details Method and device for the calibration of an exhaust gas... Method and device for the calibration of an exhaust gas...

2006-11-13

2011-10-18

Denion, Thomas (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

Having means analyzing composition of exhaust gas

C060S274000, C060S285000, C060S286000, C073S023320, C073S114720, C701S103000, C701S109000, C701S114000

Reexamination Certificate

active

08037671

ABSTRACT:
A plateau phase of a test signal of an exhaust gas probe located in a catalytic converter is detected following a jump from a preset rich air/fuel ratio in a combustion chamber of one cylinder to a preset lean air/fuel ratio, the plateau phase being obtained following the jump, and the duration is determined as a storage period. A plateau phase of the test signal, which is obtained following a jump from a preset lean air/fuel ratio to a preset rich air/fuel ratio, is detected following the jump, and the duration of the plateau phase is determined as an evacuation period. An allocation rule for assigning the test signal to a detected air/fuel ratio is adjusted according to the storage period and the evacuation period. To calibrate the exhaust gas probe, the allocation rule is adapted according to a plateau value of the test signal during the plateau phase.

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Laurell et al.; “A Metal Substrate eith Integrated Oxygen Sensor; Functionality and Influence on Air/Fuel Ratio Control”; SAE International; pp. 8, 2003.

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