Engine data processor and computer-implemented method for the adjustment of an exhaust gas composition

An internal combustion engine, comprising:

• an engine data processor, which is structured and arranged for adjusting a leaking exhaust gas composition for the internal combustion engine, the engine data processor being further structured and arranged for:
• receiving a geometric characteristic of an exhaust unit which is structured and arranged for being that through which the exhaust gas composition is discharged, and determining from the geometric characteristic a smoke visibility limit value;
• receiving a filter fill status information from an exhaust gas filter which is structured and arranged for filtering the exhaust gas composition;
• receiving a mean catalytic converter temperature of an exhaust gas catalytic converter structured and arranged for catalyzing the exhaust gas composition and determining a nitrogen dioxide conversion rate subject to the filter fill status information which has been received and the mean catalytic converter temperature;
• comparing the nitrogen dioxide conversion rate—which has been calculated—with the smoke visibility limit value, and determining therefrom a control variable for the internal combustion engine so that the exhaust gas composition is invisible;
• and
• issuing the control variable;
• an engine structured and arranged for providing a mechanical power;
• and
• an exhaust gas aftertreatment system including the exhaust gas catalytic converter and the exhaust gas filter.

A computer-implemented method for adjusting an exhaust gas composition in an exhaust unit of an internal combustion engine, the method comprising the steps of:

• receiving a geometric characteristic of the exhaust unit of the internal combustion engine;
• establishing a smoke visibility limit value from the geometric characteristic;
• receiving a mean catalytic converter temperature and a filter fill status information and establishing a nitrogen dioxide conversion rate subject to a catalytic converter temperature and the filter fill status information;
• comparing the smoke visibility limit value—which has been established—with the nitrogen dioxide conversion rate;
• and
• establishing a control variable with which the internal combustion engine is operated so that the exhaust gas composition that is to be discharged at the exhaust unit is invisible, the computer-implemented method being for adjusting the exhaust gas composition which has been filtered and catalyzed in the exhaust unit.