Patent ID: 7669561

Claim:
A high-power two-stroke engine comprising: a cylinder; a piston which is mounted so as to be displaceable in the cylinder and delimits a working space; a crankcase; a crankshaft mounted in the crankcase so as to be rotatable about an axis, wherein the crankcase adjoins the cylinder and encloses a crank space which is connected to the cylinder, and an intake pipe for an air/fuel mixture being formed on the crankcase, wherein: the piston is connected via a connecting rod to the crankshaft; in the crankshaft runs a crankshaft duct in the longitudinal direction which opens out into the crank space and is connected, as a function of the rotational angle of the crankshaft, by means of an inlet opening to the intake pipe; at least one transfer duct is formed in the cylinder, by means of which transfer duct the air/fuel mixture can, as a function of the position of the piston in the cylinder, flow from the crank space past the piston and into the working space; deflector elements are arranged within the crankcase and are adapted to fill the crank space with the air/fuel mixture; the deflector elements comprise a crankshaft duct which runs within the crankshaft in such a way that the centrifugal forces which occur as the crankshaft rotates accelerate the air/fuel mixture flowing in the crankshaft duct in the direction of the crank space; the crankshaft duct is formed as a bore and encloses an angle α>0° with the axis of the crankshaft; the connecting rod is connected to the crankshaft by means of an eccentrically arranged crank pin, and the crankshaft duct opens out into the crank space at the side opposite from the crank pin; a slot which runs in the radial direction between the crankshaft duct and the crank space is provided in the crankshaft; and the slot is arranged at the side opposite from the crank pin.