engine the second part k2 is taken from a characteristic field as a function of the throttle valve position u03b1 and the rotational speed n the load on the engine is taken into account by means of this characteristic field the third part k3 finally depends on the corrected induction pipe pressure change u03b4 pcorr and takes the dynamic procedures into account the corresponding values and functions for the steps s10 s11 and s12 are again determined by test drives or on the engine test stand the correction factor k is determined during the step s13 from the sum of the three parts k1 to k3 during the step s14 finally this correction factor k is passed on to the procedural routine for injection time calculation which then specifies a correspondingly longer injection period and therefore a larger fuel quantity the correction factor k for acceleration enrichment is recalculated in accordance with the steps previously described each time the top dead center of a cylinder is reached from first recognition of the acceleration state the interrogation for ending the acceleration enrichment then takes place during the next cycle at the step s9 for this purpose the step s15 checks whether the induction pipe pressure change u03b4 p determined by means of the characteristic field is greater than the limiting value gw if this is the case the steps s10 to s14 for calculating the new correction factor k again take place if however the induction pipe pressure change u03b4 p is smaller than the limiting value gw one of the change values u03b4 p1 or u03b4 p2 must still be greater.