Patent ID: 7299773
Filing Date: 2007-11-27
Classification: F02F

Abstract:
1. A cylinder for a two-stroke engine, the cylinder comprising: a cylinder wall defining a cylinder interior; a cylinder head closing off a combustion chamber in the cylinder interior; an exhaust connected to the cylinder interior; at least one transfer passage disposed in the cylinder wall and having a transfer port opening into the cylinder interior, wherein the at least one transfer passage connects a crank case of the two-stroke engine to the combustion chamber; the at least one transfer passage having at the level of the transfer port at least one flow deflecting rib that is spaced radially outwardly from the transfer port relative to a longitudinal cylinder axis; wherein the at least one flow deflecting rib has a first end remote from the cylinder head and a second end proximal to the cylinder head, wherein the first end projects not as far into the at least one transfer passage as the second end so that a flow flowing in the at least one transfer passage from the crank case into the combustion chamber is divided gradually into two branches.