METHOD AND SYSTEM FOR DETECTING AMMONIA SLIP INTO EXHAUST GAS CLEANING SYSTEM Russian patent published in 2017 - IPC B01D53/00 

FIELD: engines and pumps.

SUBSTANCE: according to one of the examples, the exhaust gas system consists of two NO_x sensors and uses varying responses of the NO_x sensors to assign the output signal of a NO_x sensor in the exhaust pipe to NO_x and NH₃ levels in it. The system includes an ammonia slip detection meter with amplitude-frequency characteristics, which defines the possibility of NO_x and NH₃ slip based on the sensor measured values which are further processed by a controller for the adjustment of one or more parameters on the basis of the above mentioned assignment and modification of the sensor output signal.

EFFECT: invention allows to detect NH₃ slip online at a high detection sensitivity without NO_x input from the supplied gas.

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