ENGINE DATA PROCESSOR AND COMPUTER-IMPLEMENTED METHOD FOR ADJUSTING AN EXHAUST GAS COMPOSITION

Engine data processor (1) for adjusting an exhaust gas composition (25) exiting from an internal combustion engine, wherein the engine data processor (1) is configured to receive a geometric characteristic (10) of an exhaust discharge unit (11) through which the exhaust gas composition (25) can be discharged, and to determine therefrom a smoke visibility limit value (21,3), to receive filter filling state information (20) of an exhaust gas filter (16) designed to filter the exhaust gas composition (25), to receive an average catalyst temperature (22) of an exhaust gas catalyst (18) designed to catalyze the exhaust gas composition (25) and, depending on the filter filling state information (20) and the average catalyst temperature (22), to determine a nitrogen dioxide conversion rate (12), to compare the nitrogen dioxide conversion rate (12) and the smoke visibility limit value (21,3) with one another and therefrom to determine a control variable (5) for the internal combustion engine such that the exhaust gas composition (25) is invisible, and to output the control variable (5).