Patent ID: 7894974

Claim:
A method for operating a two-stroke engine that comprises a cylinder with a combustion chamber that is delimited by a reciprocating piston, wherein the piston drives in rotation a crankshaft, and wherein a spark plug projects into the combustion chamber and ignites a fuel/air mixture, wherein the two-stroke engine further comprises devices for supplying fuel and combustion air to the combustion chamber and a control unit that determines the ignition timing based on an ignition map, wherein the ignition map indicates the ignition timing as a function of the engine speed for at least one first and one second operating states and for at least one first and one second engine speed ranges; the method comprising the step of: setting for an engine cycle the ignition timing in the second operating state at least within the first engine speed range based on the engine speed and based on the number of engine cycles since the last combustion, wherein, at the same engine speed, different ignition timings are set for at least two different numbers of engine cycles since the last combustion.