Abstract
Reporters obtained the following quote from the background information supplied by the inventors: “Atwo-stroke engine includes an engine block having at least one cylinder with port holes within a wall of eachcylinder, where at least one port hole provides fresh air (or an air/fuel mixture) into a combustion chamberof the cylinder and at least one port hole allows exhaust gas to leave the combustion chamber. The engineblock of the two-stroke engine is often cast and/or machined. However, the casting and/or machining ofthe cylinder block often leaves jagged edges and/or burs on the surface of the port holes. These jaggededges and/or burs can lead to scoring damage on the piston and/or piston rings and/or debris within thecylinder, which can lead to performance issues and/or engine failure. Thus, a need exists for port holeswith improved surface features in a two-stroke engine.”
NETL
NSTL