Two-stroke engine

A two-stroke engine , especially in a work apparatus, has a combustion chamber disposed in a cylinder. The combustion chamber is delimited by a reciprocating piston. The piston drives a crankshaft viaa connecting rod. The two-stroke engine has an intake channel for the supply of fuel into the crankcase, an outlet for exhaust gases from the combustion chamber and an air channel for the supply of substantially fuel-free air. A throttle element is mounted in the air channel. At pregiven positions of the piston, the crankcase is connected via at least one overflow pipe to the combustion chamber.In order to prevent air from being drawn by suction into the air channel because of leakages during idle or at low rpm, a fluid connection is provided between the air channel downstream of the throttle element and the crankcase for under pressure compensation which connection is present at least partially for a position of the piston from 90 DEG ahead of bottom dead center to 90 DEG after bottom dead center. A connection b