Otto-direct-injection engine

Otto-direct injection engine, in particular for motor vehicles with Kraftstoffeinblasventilen (1) by a common fuel and air rail (3, 5) are connected to each other, wherein the fuel and the compressed air by means of a fuel pump or a compressor under a predetermined pressure, and wherein the fuel and the compressed air to a mixing chamber (4) in the Kraftstoffeinblasventilen (1) from the common fuel and air rail (3, 5) is supplied, characterized in that a heating device (6) at least for the fuel is provided and the heater (6) either to the fuel flow based immediately before or in the field of fuel and compressed air rail (3, 5) is arranged and that the fuel-carrying part and the compressed air leading part of the fuel and air rail (3, 5) in heat transfer proximity one another are.