Method and device for controlling an exhaust treatment system
AssigneeRobert Bosch GmbH
InventorsHolger Plote, Andreas Krautter, Michael Walter, Juergen Sojka
Life of this patent
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Abstract
A method and a device for controlling an internal combustion engine having an exhaust gas aftertreatment system are described. A quantity (B) which characterizes the state of the exhaust gas aftertreatment system is determined based on at least one characteristic operating quantity of the internal combustion engine.
Claims13
A method of controlling an exhaust gas aftertreatment system, in particular of an internal combustion engine, it being possible when first operating states of the internal combustion engine are present to predetermine a state quantity (B) characterizing the state of the exhaust gas aftertreatment system based on at least one pressure difference between the pressure upstream from the exhaust gas aftertreatment system and the pressure downstream from the exhaust gas aftertreatment system, wherein, when second operating states are present, the state quantity (B) is simulated based on at least one characteristic operating quantity of the internal combustion engine.
The method, in particular according to one of the preceding claims, of controlling an exhaust gas aftertreatment system, it being possible to predetermine a state quantity (B) characterizing the state of the exhaust gas aftertreatment system based on at least one pressure difference between the pressure upstream from and the pressure downstream from the exhaust gas aftertreatment system,
- wherein in addition to the pressure difference a volume flow quantity which characterizes the exhaust gas volume flow is taken into account.
A device for controlling an exhaust gas aftertreatment system, in particular of an internal combustion engine, having means which, when first operating states of the internal combustion engine are present, predetermine a state quantity (B) characterizing the state of the exhaust gas aftertreatment system based on at least one pressure difference between the pressure upstream from the exhaust gas aftertreatment system and the pressure downstream from the exhaust gas aftertreatment system, wherein means are provided which, when second operating states are present, simulate the state quantity (B) based on at least one characteristic operating quantity of the internal combustion engine.
Dependencies are inferred from the claim text.