Two-stroke engine comprising a muffler

An operating method for operating a two-stroke engine of an engine-driven tool with a muffler, wherein

• the muffler comprises a muffler inlet which is followed by a flow channel, so that
• the flow channel is attached to an outlet of a combustion space of the two-stroke engine by the muffler inlet,
• and wherein at least one overflow channel opens into the combustion space, via which fuel-air mixture enters the combustion space when a piston moveably limiting the combustion space is in a region of bottom dead centre,
• wherein the flow channel opens into a first chamber on a channel end located opposite the muffler inlet,
• and a second chamber into which exhaust gas flows through a main outlet branched off the flow channel and out of which the exhaust gas flows through a muffler outlet is provided,
• the flow channel between the muffler inlet and the first chamber is molded such that the exhaust gas flowing into the muffler inlet because of a mass inertia of the exhaust gas predominantly flows into the first chamber and following a charging of the first chamber flows back again, thereby resulting in a counterpressure being formed in or in the direction of the combustion space,
• further comprising over the stroke movement of the piston:
• opening of the outlet of the combustion space through a downward movement of the piston,
• opening of the overflow channel through further downward movement of the piston,
• forming of the counterpressure of the exhaust gas in the direction of the combustion space while the outlet of the combustion space and the at least one overflow channel are open,
• closing of the overflow channel through an upward movement of the piston and
• closing of the outlet of the combustion space through further upward movement of the piston.