Internal combustion engine with adjustable flow exhaust system

A two-cycle internal combustion engine comprising:

• a cylinder with a cylinder wall and an end deck;
• a piston with a piston head, the piston reciprocally moveable in the cylinder from a compression stroke position proximate the end deck and an expansion stroke position distal from the end deck, the piston head, end deck and wall of the cylinder between the head and end deck forming a combustion chamber with a top at the cylinder end deck;
• intake means for introducing air into the cylinder at predetermined intervals, and,
• exhaust means for removing combustion gases from the cylinder at predetermined intervals wherein,
• the intake means includes a plurality of intake ports peripherally arranged in the wall of the cylinder proximate the piston head in the expansion stroke position and the exhaust means comprises a plurality of exhaust ports peripherally arranged in a cylindrical configuration proximate the top of the combustion chamber;
• fuel injection means for injecting fuel into the cylinder at predetermined intervals;
• slide valve means having a cylindrical sleeve juxtaposed to the exhaust ports;
• actuating means for selective displacement of the sleeve between a position blocking the exhaust ports and a position exposing the exhaust ports at predetermined intervals;
• sensing means for sensing engine performance conditions and producing a representative output signal;
• and,
• regulating means interconnecting the actuating means and the sensing means for regulating the actuating means to position the sleeve at a location between the position blocking the exhaust ports and fully exposing the exhaust ports in response to the representative output signal of the sensing means.