Fuel injector

Claim 1

IN A LIQUID FUEL INJECTION NOZZLE FOR THE COMBUSTION CHAMBER OF AN INTERNAL COMBUSTION ENGINE, COMPRISING A NOZZLE HOUSING HAVING A BORE THEREIN WITH A PLUNGER CHAMBER AND SEAT AT THE INNER END THEREOF AND AN ORIFICE IN SAID SEAT LEADING INTO SAID COMBUSTION CHAMBER, A FUEL INJECTION PLUNGER HAVING A CYLINDRICAL INNER END PORTION RECIPROCABLE IN SAID BORE ADJACENT SAID PLUNGER CHAMBER AND HAVING ITS LOWERMOST END PORTION ADAPTED TO MATE WITH SAID SEAT AT THE END OF THE INJECTION STROKE OF SAID PLUNGER IN SAID PLUNGER CHAMBER AND TO PROVIDE AN END WALL OF SAID PLUNGER CHAMBER WHEN SPACED THEREABOVE, A LIQUID FUEL PASSAGE IN SAID HOUSING ADJACENT SAID BORE CONNECTED TO A FUEL SUPPLY, AND A CHECK VALVE MEANS IN SAID FUEL PASSAGE; THE IMPROVEMENT COMPRISING A LIQUID FUEL CHARGE DIVIDIN AND DISTRIBUTING PASSAGE SURROUNDING SAID BORE ADJACENT THE UPPER END OF SAID PLUNGER CHAMBER, A PLURALITY OF CIRCUMFERENTIALLY SPACED SPRAY ORIFICE MEANS PROVIDING COMMUNICATION BETWEEN SAID CHARGE DIVIDING AND DISTRIBUTING PASSAGE AND SAID BORE, EACH OF SAID ORIFICES EXTENDING RADIALLY OF SAID BORE TO INJECT SAID FUEL AGAINST A DIFFERENT CIRCUMFERENTIALLY SPACED HEATER AREA OF SAID PLUNGER END PORTION WHEN SAID PLUNGER IS IN A FIRST PREDETERMINED PORTION OF ITS STROKE IN SAID BORE, AND SAID PLUNGER IN A SECOND PREDETERMINED PORTION OF ITS STROKE IN SAID BORE COVERING AND CLOSING OFF SAID ORIFICES AND THE FLOW OF FUEL THROUGH SAID ORIFICES THUS SERVING TO CIRCUMFERENTIALLY LUBRICATE SAID PLUNGER DURING SAID SECOND PREDETERMINED PORTION OF ITS STROKE, WHEREBY TO DIVIDE AND INCREASE THE VAPORIZATION OF EACH CHARGE OF LIQUID FUEL DELIVERED TO SAID PLUNGER CHAMBER ONLY WHEN SAID PLUNGER IS IN SAID FIRST PREDETERMINED PORTION OF ITS STROKE.