Method for operating an internal combustion engine and a...

Details Method for operating an internal combustion engine and a... Method for operating an internal combustion engine and a...

2005-09-26

2008-09-30

Denion, Thomas (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S274000, C060S275000, C060S278000, C060S285000, C060S295000, C060S299000

Reexamination Certificate

active

07428809

ABSTRACT:
A method for operating an internal combustion engine; in the exhaust area of this engine there is at least one catalytic converter and downstream from the catalytic converter there is an NOx sensor. A device for carrying out this method is also provided. The NOx sensor has a cross-sensitivity to a reagent needed in the catalytic converter. In predefined operating states of the internal combustion engine, e.g., idling and/or overrun, a selection signal is supplied; when this selection signal occurs, the sensor signal supplied by the NOx sensor is interpreted as at least a measure of the reagent leakage.

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