Abstract: An ignition and mixture-forming apparatus and method for an internal combustion engine, wherein as a function of position, speed, or acceleration of an engine throttle displacement device measured by a sensor, and when the adjustment exceeds a preset value, a valve is opened to feed compressed air from a compressed-air accumulator to one or more cylinders of the engine, in addition to the intake air and the feed capacity of the fuel pump being increased, so that the filling of the cylinders with fuel/air mixture increases and the engine power thus increases. Another sensor prevents feeding of compressed air when engine speed has exceeded a preset upper limit.