Avl List Gmbh

Lombardini S.r.l.

Mario De Monte

Felice Di Iorio

Fabio Panini

Klaus Hadl

Bas Vos

Christina Schwarz

Hannes Noll

Stefan Mannsberger

The invention relates to a method for operating a particulate filter () taking the ash loading into consideration, to an arrangement in this respect, to a control unit in this respect, and to a vehicle in this respect, wherein, during the operation of the internal combustion engine (), fuel and/or lubricants are at least partially converted into ash by the internal combustion engine (), wherein a first ash value is calculated on the basis of the fuel consumption and/or the lubricant consumption of the internal combustion engine (), wherein, after regeneration of the particulate filter, the differential pressure across the particulate filter () is determined, wherein a second ash value is calculated on the basis of the determined differential pressure, wherein the ash quantity in the particulate filter () is determined from the first and the second ash value, and wherein, if the determined ash quantity exceeds a predefined value, a status device is activated.

Method for operating a particle filter taking the ash quantity into consideration

The invention relates in particular to a method for adjusting the loading () of a particulate filter () and to an assembly designed to carry out the method, wherein the exhaust gas aftertreatment unit () comprises at least two SCR systems () and a particulate filter (), a first operating material amount being introduced in a metered manner before the first SCR system (), and a second operating material amount being introduced in a metered manner before the second SCR system (), the operating material being convertible into a reducing agent. The state of loading of the particulate filter () is determined using a model, and, if the determined state of loading is below a previously defined loading range (), the first operating material amount is adjusted in such a way that the amount of reducing agent is greater than or equal to the amount of reducing agent necessary for nitrogen oxide reduction in accordance with the reaction stoichiometry in the first SCR system (), and/or, if the determined state of loading is above a previously defined loading range (), the first operating material amount is adjusted in such a way that the amount of reducing agent is less than the amount of reducing agent necessary for nitrogen oxide reduction in accordance with the reaction stoichiometry in the first SCR system ().

Method for adjusting the loading of a particulate filter

The invention relates to a method for improving the efficiency of an SCR system of an exhaust gas aftertreatment system () of an internal combustion engine (), and to an internal combustion engine (), wherein an operating medium is metered in upstream of the SCR catalytic converter () of the SCR system in a normal operating mode, wherein the operating medium comprises a reducing agent or can be converted into a reducing agent, wherein the reducing agent is stored at least temporarily in an SCR catalytic converter () of the SCR system, wherein the method comprises the following steps: operating of the internal combustion engine () in the normal operating mode, defining of a determined control value () by way of determining of the mass of an exhaust gas component which is measured overall at a point in the course of the exhaust gas aftertreatment system () during a first measurement window, determining of a calculated control value () by way of calculating of the mass of the exhaust gas component which occurs overall at the point in the course of the exhaust gas aftertreatment system () during the first measurement window, determining of the deviation () between the determined control value and the calculated control value, checking whether the determined deviation lies within a predefined deviation range, adapting of the metering quantity of the operating medium if the determined deviation lies outside the deviation range.

Method and internal combustion engine for improving the efficiency of an SCR system

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Birkfeld, Austria

Mario De Monte