Phase adjusting servo mechanism for internal combustion engine and the like

Claim 1

IN A TWO-CYCLE INTERNAL COMBUSTION ENGINE, A SERVO MECHANISM OPERABLE TO MODULATE THE CYCLIC TIMING OF THE ENGINE TO REGULATE THE POWER OUTPUT AND COMPRESSION CHARACTERISTICS THEREOF, SAID MECHANISM COMPRISING A CAMSHAFT ROTATABLE TO SEQUENTIALLY TIME THE SCAVENGED EXHAUSTING OF THE SEVERAL ENGINE COMBUSTION CHAMBERS AND HAVING A BORE EXTENDING AXIALLY FROM ONE END THEREOF, PASSAGE MEANS FOR SUPPLYING PRESSURIZED OIL TO SAID CAMSHAFT BORE, A FIRST MEMBER DRIVINGLY SECURED ON SAID CAMSHAFT END, A SECOND ENGINE DRIVEN MEMBER ROTATABLY MOUNTED WITH RESPECT TO SAID FIRST MEMBER AND COOPERATING THEREWITH TO DEFINE AN ANNULAR CHAMBER, SAID FIRST AND SECOND MEMBERS EACH HAVING EQUIANGULARLY SPACED RADIAL VANES COOPERATING TO DIVIDE SAID ANNULAR CHAMBER INTO A FIRST AND SECOND PLURALITY OF PAIRED OPPOSING EXPANSIBLE MOTOR CHAMBERS, PASSAGE MEANS CONNECTING THE OPPOSING PAIRS OF SAID EXPANSIBLE CHAMBERS TO SAID CAMSHAFT BORE AND OPENING THEREON IN LONGITUDINALLY SPACED AND ANGULARLY DISPOSED PORTS, AND VALVE MEANS INCLUDING A VALVE MEMBER RECIPROCABLY AND ROTATABLY MOUNTED IN SAID CAMSHAFT BORE AND DRIVINGLY CONNECTED TO SAID SECOND MEM-