Internal combustion engine

Claim 1

A TURBOCHARGED INTERNAL COMBUSTION ENGINE HAVING A SUBSTANTIALLY UNIFORM HORSEPOWER OUTPUT OVER THE RANGE OF USEFUL OPERATING SPEEDS, COMPRISING A RECIPROCATING INTERNAL COMBUSTION ENGINE, MEANS FOR SUPPLYING FUEL TO SAID ENGINE FOR COMBUSTION THEREIN, OPERATOR-CONTROLLED MEANS FOR REGULATING THE SUPPLY OF FUEL CHARGE TO SAID ENGINE, ENGINE-SPEED CONTROLLED MEANS FOR REGULATING THE MAXIMUM SUPPLY OF FUEL TO SAID ENGINE, MEANS IN SAID ENGINE-SPEED CONTROLLED MEANS FOR PROGRESSIVELY INCREASING THE MAXIMUM FUEL CHARGE SUPPLIED TO THE ENGINE AS THE ENGINE SPEED DECREASES, AND A TURBOCHARGER EFFICIENT IN THE LOWER USEFUL OPERATING SPEEDS OF SAID ENGINE AND DRIVEN BY COMBUSTION GASES FROM SAID ENGINE FOR SUPPLYING AIR TO SAID ENGINE FOR COMBUSTION OF FUEL THEREIN, SAID ENGINE AND TURBOCHARGER COMBUNATION HAVING A VOLUMETRIC EFFICIENCY WHICH IS SUBSTANTIALLY CONSTANT THROUGHOUT SAID RANGE OF USEFUL OPERATING SPEEDS, PRODUCING AN INCREASING POSITIVE SCAVENGING PRESSURE DIFFERENTIAL WITH DECREASING ENGINE SPEED AND AN INLET MANIFOLD CHARGE PRESSURE SUBSTANTIALLY CONSTANT THROUGHOUT SAID RANGE OF USEFUL OPERATING SPEEDS THEREBY MATCHING THE INCREASING FUEL CHARGE WITH DECREASING ENGINE SPEED TO PRODUCE SUBSTANTIALLY CONSTANT HORSEPOWER OUTPUT THROUGHOUT SAID RANGE OF USEFUL OPERATING SPEEDS.