Fuel injector

Claim 1

AN INJECTOR FOR INJECTING FUEL INTO A CYLINDER OF A MULTI-CYLINDER INTERNAL COMBUSTION ENGINE, COMPRISING AN INJECTOR BODY INCLUDING A NOZZLE AND HAVING A FUEL PASSAGE THERETHROUGH, SAID FUEL PASSAGE BEING ADAPTED TO BE CONNECTED AT ONE END TO A FUEL SUPPLY LINE AND AT ITS OTHER END TO A FUEL RETURN LINE TO PROVIDE A FLOW OF FUEL THERETHROUGH, SAID BODY ALSO HAVING A PLUGER BORE THEREIN, A RECIPROCABLE PLUNGER MOUNTED IN SAID BORE, SAID PLUNGER AND SAID BORE HAVING COACTING MEANS DEFINING A PORTION OF THE FUEL RETURN, THE LOWER END OF SAID PLUNGER AND SAID NOZZLE TOGETHER DEFINING A FUEL CHAMBER SEPERATE FROM SAID FUEL PASSAGE, SAID BODY ALSO HAVING A FEED HOLE CONNECTING SAID FUEL PASSAGE WITH SAID FUEL CHAMBER ADJACENT THE UPPER END OF SAID CHAMBER AND ADAPTED TO BE OPENED AND CLOSED BY A PORTION OF SAID PLUNGER ADJACENT THE LOWER END THEREOF, SAID PLUNGER CONFORMING IN CROSSSECTION TO SAID CHAMBER AND SERVING TO EVACUATE SAID CHAMBER WHEN MOVING INTO CLOSED POSITION TO FORCE THE CONTENTS OF SAID CHAMBER OUT THROUGH SAID NOZZLE, SAID PLUNGER INCLUDING A SINGLE MEANS FORMING A PART OF SAID COACTING MEANS AND LOCATED ON THE PLUNGER ABOVE THE LOWER END THEREOF, SAID SINGLE MEANS CLOSING SAID FUEL RETURN PASSAGE AT SAID COATING MEANS BETWEEN SAID FEED HOLE AND SAID OTHER END OF SAID FUEL PASSAGE WHEN SAID PLUNGER OPENS SAID FEED HOLE, AND OPENING SAID FUEL PASSAGE AT SAID COACTING MEANS BETWEEN SAID FEED HOLE AND SAID OTHER END OF SAID FUEL PASSAGE WHEN SAID FEED HOLE IS CLOSED BY THE PLUNGER, AND FLOW CONTROL MEANS IN SAID FUEL PASSAGE UPSTREAM OF SAID FEED HOLE FOR CONTROLLING THE FLOW OF FUEL THERETHROUGH WHEN SAID PLUNGER BOTH CLOSES SAID FUEL PASSAGE AT SAID POINT AND OPENS SAID FEED HOLE TO PERMIT AN AMOUNT OF FUEL TO FLOW THROUGH SAID FEED HOLE EQUIVALENT TO THAT PASSING THROUGH SAID FLOW CONTROL MEANS.