Method for operating an internal combustion engine
AssigneeMAN Diesel & Turbo SE
InventorsAndreas Döring, Markus Bauer
Life of this patent
Estimating the term…
Abstract
A method for operating an internal combustion engine having a motor and an exhaust gas aftertreatment system having an exhaust gas aftertreatment component, wherein exhaust gas formed in the motor during combustion of fuel is guided via the exhaust gas aftertreatment system for cleaning, includes: determining an exhaust gas actual value that depends upon an actual value of a nitrogen dioxide fraction in the exhaust gas upstream of the exhaust gas aftertreatment component; and changing at least one operating parameter for the motor such that the actual value of the nitrogen dioxide fraction is brought closer to a corresponding reference value for the nitrogen dioxide fraction.
Claims9
A method for operating an internal combustion engine having a motor, an exhaust gas aftertreatment system having an exhaust gas aftertreatment component, and a NOx sensor arranged downstream of the exhaust gas aftertreatment component, wherein exhaust gas formed in the motor during combustion of fuel is guided via the exhaust gas aftertreatment system for cleaning, the method comprising:
- measuring, by the NOx sensor, the NOx actual value as the exhaust gas actual value, the measurement being performed downstream of the exhaust gas aftertreatment component of the exhaust gas aftertreatment system;
- determining the actual value of the nitrogen dioxide fraction in the exhaust gas upstream of the exhaust gas aftertreatment component based on the exhaust gas actual value measured downstream of the exhaust gas aftertreatment component;
- comparing the determined actual value of the nitrogen dioxide fraction with a corresponding reference value for the nitrogen dioxide fraction;
- and
- changing at least one operating parameter for the motor depending upon the comparison such that the actual value of the nitrogen dioxide fraction is brought closer to the corresponding reference value for the nitrogen dioxide fraction,
- whereby the exhaust gas aftertreatment component operates in an optimized manner.
Dependencies are inferred from the claim text.