Patent ID: 7198011

Claim:
A two stroke internal combustion engine comprising: a cylinder, the cylinder having a cylinder head, a wall and a crankcase, the wall extending between the cylinder head and the crankcase and the cylinder head having first and second openings; a piston mounted for reciprocation in the cylinder; the cylinder head, the wall and the piston forming a combustion chamber; a direct injector mounted in the first opening for injecting fuel into the combustion chamber; a spark plug mounted in the second opening for igniting a fuel-air mixture in the combustion chamber; an inlet port in the wall of the cylinder; an exhaust port in the wall of the cylinder; the exhaust port being exposed by the piston before the inlet port on an exhaust cycle so a pressurized exhaust gas is substantially exhausted before the inlet port opens; a first forced air induction means for forcing air into the inlet port, the first forced air induction means being connected to the inlet port; sealing means for preventing crankcase oil from entering the intake and exhaust ports and the combustion chamber, the sealing means being between the piston and the wall of the cylinder below the inlet port and the outlet port when piston is at the top dead center position of a revolution cycle; a first compression ring between the piston and the wall of the cylinder below the inlet port and the outlet port at the top dead center position of a revolution cycle; a second compression ring being at the end of the piston opposite from the crankcase; and a method for delivering oil lubricants to the second compression ring so that only enough lubricants is delivered to provide lubrication, but not excessive lubricants to overflow into the inlet port, the exhaust port, and the combustion chamber.