Fuel injection system for an internal combustion engine

Claim 1

A FUEL INJECTION SYSTEM FOR AN INTERNAL COMBUSTION ENGINE WHICH COMPRISES PUMP MEANS, THE PUMP MEANS BEING DRIVEN AT A RATE PROPORTIONAL TO THE SPEED OF THE ENGINE, MEANS FOR SUPPLYING FUEL TO SAID PUMP MEANS, A LINE RECEIVING FUEL FROM SAID PUMP MEANS, THERE BEING A RESTRICTED PORTION IN SAID LINE, WHEREBY A PRESSURE DIFFERENTIAL IS SET UP IN SAID LINE WHEN FUEL IS PUMPED THERETHROUGH BY SAID PUMP MEANS, A CYLINDER HAVING A HEAD END CONNECTED TO SAID LINE BETWEEN SAID PUMP AND SAID RESTRICTED PORTION, THE CYLINDER HAVING A DISCHARGE END CONNECTED TO SAID LINE ON THE OTHER SIDE OF THE RESTRICTED PORTION, A PISTON IN SAID CYLINDER, MEANS FOR RESILIENTLY URGING THE PISTON TOWARD THE HEAD END OF THE CYLINDER, A PRESSURE RELIEF VALVE CONNECTED TO THE DISCHARGE END OF THE CYLINDER AND DISCHARGING FUEL WHEN THE PRESSURE THEREIN EXCEEDS A PREDETERMINED PRESSURE, THERE BEING AN ORIFICE IN THE DISCHARGE END OF THE CYLINDER FOR DISCHARGING FUEL THEREFROM, A PISTON ROD ATTACHED TO SAID PISTON AND HAVING A FRUSTO-CONIC PORTION RECIPROCABLE IN SAID ORIFICE, THE EFFECTIVE SIZE OF SAID ORIFICE INCREASING AS THE PISTON MOVES TOWARD THE DISCHARGE END OF THE CYLINDER, A FUEL RECEIVING LINE RECEIVING FUEL FROM THE ORIFICE, A CARBURETOR THROAT RECEIVING FUEL FROM THE FUEL RECEIVING LINE, DELIVERY VALVE MEANS IN SAID FUEL RECEIVING LINE, AIR VALVE MEANS IN THE THROAT, AND MEANS LINKING THE DELIVERY VALVE MEANS AND THE AIR VALVE MEANS FOR OPENING AND CLOSING TOGETHER.