Patent ID: 8667933

Claim:
A two-stroke engine, comprising: a crankcase; a cylinder connected to said crankcase; a piston reciprocally mounted within said cylinder to define a combustion chamber in said cylinder; a crankshaft mounted rotatably in said crankcase and drivingly connected with said piston; at least one overflow passage connecting the crankcase and the combustion chamber when the piston is located in the region of its lower dead center position; a connecting stub attached to said cylinder and having therein an intake passage that opens into the crankcase and supplies fuel and combustion air, said intake passage including therein an air-fuel mixture passage, wherein at least one section of the mixture passage extends in said connecting stub; at least one fuel opening for supplying fuel into said mixture passage; and a guiding rib positioned within said connecting stub and running in the longitudinal direction of the mixture passage and protruding into the mixture passage.