Patent ID: 7533641

Claim:
A method for operating an internal combustion engine, the internal combustion engine comprising a combustion chamber, a cylinder head, a piston, and a poppet valve, wherein the poppet valve comprises a valve stem and a valve head, the valve head comprising an inner valve head carried rotationally against an outer valve head, the inner valve head comprising at least a first inner valve port and the outer valve head comprising at least a first outer valve port, wherein the inner valve head and the outer valve head are rotatable relative to each other to open a first path through the valve head when the first inner valve port is aligned with the first outer valve port, the method comprising: a. moving the piston away from the cylinder head; b. extending the valve head into the combustion chamber, enabling an intake gas to flow around the valve head and into the combustion chamber; c. rotating the inner valve head relative to the outer valve head to open the first path through the valve head, enabling the intake gas to flow through the valve head and into the combustion chamber; d. retracting the valve head towards the cylinder head; e. rotating the inner valve head relative to the outer valve head to close the first path; f. moving the piston towards the cylinder head; g. seating the valve head against the cylinder head; and h. causing combustion in the combustion chamber.