Fuel injection for internal combustion engines

Claim 1

A COMBUSTION ENGINE FUEL SYSTEM FOR AN INTERNAL COMBUSTION ENGINE HAVING A PLURALITY OF OPERATING CYLINDERS COMPRISING WALL MEANS DEFINING A MANIFOLD CONNECTING EACH OF THE ENGINE CYLINDERS AND HAVING AN AIR INLET, A LIQUID FUEL SPRAY NOZZLE MOUNTED ON SAID MANIFOLD AND ARRANGED TO DIRECT A SPRAY OF LIQUID FUEL INTO THE STREAM OF AIR COMING IN THROUGH SAID INLET OF SAID MANIFOLD, AND A POSITIVE DISPLACEMENT PUMP CONNECTED TO SAID ENGINE AND OPERATED THEREBY AND HAVING A DISCHARGE CONNECTED DIRECTLY TO SAID FUEL SPRAY NOZZLE, SAID PUMP BEING SET TO DISCHARGE AT DISTINCT AND SEPARATE TIMES NEEDED QUANTITIES OF FUEL FOR EACH CYLINDER ONLY DURING THE RESPECTIVE INTAKE PORTIONS OF THE CYCLES OF OPERATION OF EACH AFFECTED ENGINE CYLINDER AND ONLY OVER VERY SHORT PERIODS OF THE ENGINE CYCLE TIME DURING WHICH THE AFFECTED CYLINDER IS RECEIVING FUEL AND AIR FROM SAID MANIFOLD.