Fuel supply system for compression ignition internal combustion engines

Claim 1

IN A FUEL SYSTEM FOR USE WITH A COMPRESSION IGNITION ENGINE HAVING FUEL INJECTORS AND ENGINE-SPEED RESPONSIVE MEANS, SAID SYSTEM HAVING A HOUSING WITH A BORE IN WHICH A SHUTTLE PISTON MOVES WITH ITS END DEFINING FIRST AND SECOND PORTED CHAMBERS, ONE IN EACH END OF SAID BORE, A FUEL SOURCE, A FUEL PUMP CONNECTED TO SAID FUEL SOURCE, CONDUIT MEANS FOR CHARGING FUEL UNDER PUMP PRESSURE TO EACH SAID CHAMBER ALTERNATELY, THEREBY TO MOVE SAID SHUTTLE PISTON AND DISCHARGE FUEL FROM THE OPPOSITE CHAMBER, AND CONDUIT MEANS FOR CONNNECTING EACH SAID CHAMBER AT DISCHARGE TO A SAID FUEL INJECTOR, A MANUALLY CONTROLLED THROTTLE HAVING A CAM FACE OPERATIVELY ENGAGEABLE WITH ONE END OF SAID SHUTTLE PISTON TO DETERMINE THE EXTEND OF MOVEMENT OF THE SHUTTLE PISTON IN ONE DIRECTION, AND MOVEMENT-LIMITING MEANS ENGAGEABLE BY THE OTHER END OF SAID SHUTTLE PISTON TO DETERMINE ITS EXTENT OF MOVEMENT IN THE OTHER DIRECTION, THE COMBINATION THEREWITH OF: A NORMALLY-CLOSED THROTTLE-CONTROLLED FIRST VALVE MEANS IN SAID HOUSING, SAID THROTTLE OPENING SAID FIRST VALVE MEANS WHEN SAID THROTTLE IS OPENED, A PASSAGE IN SAID HOUSING BYPASSING SAID FIRST VALVE MEANS, AND A NORMALLY OPEN SECOND VALVE MEANS IN SAID PASSAGE, SAID SPEED RESPONSIVE MEANS CLOSING SAID SECOND VALVE MEANS AT ALL SPEEDS ABOVE IDLE SPEED, WHEREBY WHEN SAID ENGINE IS OPERATING AT A SPEED ABOVE IDLE AND SAID THROTTLE IS OPEN, SAID SECOND VALVE MEANS IS CLOSED AND ALL OF THE FUEL PUMPED FROM SAID FIRST AND SECOND PORTED CHAMBERS PASSES THROUGH SAID FIRST VALVE MEANS, AND WHEN SAID ENGINE IS OPERATING AT OR BELOW THE IDLE SPEED WITH SAID THROTTLE CLOSED, SAID SECOND VALVE MEANS IS OPEN TO PROVIDE A FLOW OF FUEL TO SAID INJECTORS EVEN THOUGH SAID FIRST VALVE MEANS IS CLOSED, AND WHEN SAID ENGINE IS OPERATING ABOVE IDLE SPEED AND SAID THROTTLE IS CLOSED, BOTH SAID FIRST AND SECOND VALVE MEANS ARE CLOSED, THEREBY SHUTTING OFF ALL FUEL TO THE INJECTORS SO THAT THE ENGINE DECOLORATES AT A MAXIMUM RATE TO FACILITATE GEAR SHIFTING AND TO PREVENT FUEL WASTAGE DURING COASTING.