the invention relates to a method for automatically generating smoothed characteristic diagrams for electronic engine controls of internal combustion piston engines . the invention is characterized in that the adjustment variable combination of the individual successive operating points are input by means of a motor control to a reference internal combustion piston engine by entering specified values of the boundary conditions for the operation of an internal combustion piston engine . according to the invention , the reference internal combustion piston engine is operated in this operating point , and the actual values and / or boundary conditions occurring during the same are acquired and compared with the specified values of the boundary conditions in an optimization system assigned to the engine control and , in the instance of variations , the adjustment variable combinations are optimally altered in a progressive manner by the optimization system . a quality function for the respective alteration of the adjustment variable combination is predetermined in the optimization system , and the quality function is corrected while taking into account already established values of the adjustment variable combination of at least one adjacent operating point .