Patent ID: 7063065

Claim:
An internal combustion engine, comprising: a crankcase chamber connected to dual cylinder piston bores, each cylinder piston bore having a piston disposed therein, each piston configured to reciprocate in a same direction within the cylinder piston bores; a crankcase passageway connected to the crankcase chamber, the crankcase passageway capable of receiving air via a throttle body; and an intake mechanism in communication with the crankcase passageway and the dual cylinder piston bores, the intake mechanism configured to allow airflow between the crankcase passageway and the throttle body during an exhaust stroke of a piston and a compression stroke of another piston, the intake mechanism further configured to allow airflow between the crankcase chamber and the cylinder piston bore via the crankcase passageway during an intake stroke of the piston and the power stroke of the other piston.