Man Truck & Bus Ag

Man Nutzfahrzeuge Ag

Man Truck & Bus Se.

Ralf Steinert

Andreas Döring

Franz Werner Prümm

Florian Walde

Jochen Philipp

Henry Munitzk

Werner Prümm

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

In a method for reducing NOin the exhaust gas of an externally ignited, explosion-type internal combustion engine that is operated at a lean fuel/air ratio of &#x3bb;&#x3e;1 and has a motor control device for controlling &#x3bb;, the &#x3bb; value is slidingly controlled as a function of an average mass temperature in the combustion chamber of the externally ignited, explosion-type internal combustion engine, wherein for a low average mass temperature &#x3bb; is decreased and for a high average mass temperature &#x3bb; is increased such that the internal combustion engine is operated in any operational state close to the misfiring limit, and thereby, with the most minimal NOemission possible.

Method for NOx reduction of externally-ignited, explosion, internal combustion engines

Growing community of inventors

Nürnberg, Germany

Ralf Steinert