Method for detecting refueling process of e.g. tank of selective catalytic reduction system of motor car, involves enclosing signal on refueling process based on signal when signal to be derived over time period exceeds threshold value

The method involves filtering a level sensor signal for recognition of a post refueling process during a sloshing event by filters with short time constant. The filtered signal of time dissipation is subjected and enclosed on the post refueling process based on the derived signal when a signal to be derived over a time period exceeds a predetermined threshold value. The signal is compared with an actual level characterizing long term-filtered signal to be stored, and a full level sensor signal is detected within a predetermined time window after starting an operating cycle. Independent claims are also included for the following: (1) a computer program having a set of instructions for performing a method for detecting a refueling process of a motion subjected tank of a selective catalytic reduction system of a motor car (2) a computer program product comprising a program code with a set of instructions for performing a method for detecting a refueling process of a motion subjected tank of a selective catalytic reduction system of a motor car. Ein Verfahren zur Erkennung eines Betankungsvorgangs eines Bewegungen unterworfenen Tanks, insbesondere eines Tanks eines SCR-Systems eines Kraftfahrzeugs ist dadurch gekennzeichnet, dass zur Erkennung eines Nachbetankungsvorgangs ein Füllstandssensorsignal (SF) während eines Schwappereignis mit Hilfe eines Filters mit kurzer Zeitkonstante gefiltert, das gefilterte Signal einer Zeitableitung unterzogen wird und abhängig von dem abgeleiteten Signal auf einen Nachbetankungsvorgang geschlossen wird.