Man Truck & Bus Ag

Man Nutzfahrzeuge Ag

Florian Walde

Andreas Döring

Ralf Steinert

Jochen Philipp

Henry Munitzk

Christian PASTÖTTER

Florian Grünbeck

Eva Bouillon

Björn Lumpp

A method for application in conjunction with an exhaust gas post-treatment system for metering an ammonia-releasing reducing agent into the exhaust gas stream of an internal combustion engine installed in a motor vehicle and operated with excess air. A control unit meters the quantity of reducing agent as a function of a stored model and during the operation of the internal combustion engine varies the metered quantity during certain operating phases and compares the change in the measured value of at least one NOsensor installed downstream of the SCR catalyst with an expected value.

Method for adjusting the metered quantity of reducing agent for selective catalytic reduction

A method for use in conjunction with an exhaust gas post-treatment system for metering an ammonia-releasing reducing agent into the exhaust gas stream of an internal combustion engine installed in a motor vehicle and operating with excess air. A control unit meters the quantity of reducing agent as a function of a stored model and, during the operation of the internal combustion engine, determines, by comparison of a value proportional to the nominal emission or the nominal conversion stored in the control unit of the internal combustion engine for the associated operating point of the internal combustion engine and/or of the exhaust gas post-treatment system with a value proportional to the actual emission or the actual conversion metrologically determined by the control unit.

Method for adjusting the metered additions of reducing agent for selective catalytic reduction

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Dietenhofen, Germany

Florian Walde