Method for operating a spark-ignition internal combustion engine

Method for operating a spark-ignition internal combustion engine which has at least one piston which reciprocates in a cylinder and adjoins a combustion chamber, the method including the following steps:

• injecting fuel centrally into the combustion chamber via at least one fuel injection device per cylinder in at least one operating range of the internal combustion engine;
• centrally igniting the combustion chamber via at least one ignition device;
• wherein the fuel is injected into the combustion chamber at an injection pressure of more than 500 bar in a second half of a compression stroke before top dead center of combustion, and the internal combustion engine is operated at an air-fuel ratio λ≥1, characterized in that;
• wherein in at least one operating range of the internal combustion engine, the fuel is injected between 180°, and 0° crank angle before the top dead center of the combustion into the combustion chamber in such a way that at least two injection jets of the fuel are directed at bowl walls of a piston bowl of the piston, which bowl walls are disposed substantially parallel to the cylinder axis and lie approximately diametrically opposite one another with respect to the cylinder axis;
• and
• wherein a jet axes of the at least two injection jets—when viewed in a sectional view containing the cylinder axis—enclose an angle of more than 30°;
• and
• retaining combustion heat in the combustion chamber by at least one thermal insulation and/or coating.