METHOD FOR OPERATING A SELF-IGNITING COMBUSTION ENGINE

Method for operating a compression-ignition internal combustion engine with at least one cylinder and a piston movable in the at least one cylinder, wherein the method comprises the steps: - Forming a combustible mixture by substantially homogeneously mixing a first fuel and air and introducing this mixture into the at least one cylinder - Compressing the combustible mixture with the piston in a compression stroke - During the compression stroke, but before the start of combustion, injecting a second fuel into the combustible mixture, thereby creating a cylinder charge, wherein the second fuel has a higher propensity for self-ignition than the first fuel - Continuing the compression stroke until combustion begins at those points of the at least one cylinder where the concentration of the second fuel and/or the temperature of the mixture is highest, wherein the emission caused by the combustion of the at least one cylinder and/or the mechanical stress of the at least one cylinder are monitored and if the emissions and/or the mechanical stress exceed respective predetermined threshold values, the - quantity and/or the timing of the injected second fuel and/or - the temperature of the cylinder charge are individually changed for the at least one cylinder in such a manner that the emissions and/or the mechanical stress fall back below their respective predetermined threshold values.