Fuel injection pump for diesel engines

Claim 1

A FUEL INJECTION PUMP FOR A DIESEL ENGINE COMPRISING A PUMP BODY, A BARREL SUPPORTED IN SAID BODY, SAID BARREL BEING PROVIDED WITH A BORE, A PLUNGER SLIDABLY SUPPORTED IN SAID BORE FOR PROVIDING SUCTION AND COMPRESSION STROKES IN SAID BORE, A FREELY OPEN PASSAGEWAY BEING PROVIDED IN THE WALL OF SAID BARREL AT A LOCATION AT WHICH THE PLUNGER PASSES BEYOND SAID PASSAGEWAY DURING SAID SUCTION STROKE TO OPEN SAID PASSAGEWAY WHILE DURING SAID COMPRESSION STROKE THE PLUNGER CLOSES SAID PASSAGEWAY, SAID PASSAGEWAY BEING IN COMMUNICATION WITH SAID BORE FOR PERMITTING FUEL TO FLOW INTO SAID BORE DURING THE SUCTION STROKE OF SAID PLUNGER, SAID PUMP BODY BEING PROVIDED WITH A FUEL DELIVERY PASSAGEWAY WHICH EXTENDS FROM SAID BORE, VALVE MEANS IN THE FUEL DELIVERY PASSAGEWAY FOR CONTROLLING DISCHARGE OF FUEL FROM SAID FUEL DELIVERY PASSAGEWAY, SAID PLUNGER, DURING SAID COMPRESSION STROKE, EXERTING PRESSURE ON FUEL IN SAID BORE AND SAID FUEL DELIVERY PASSAGE TO OPEN SAID VALVE MEANS TO PERMIT DISCHARGE OF SAID FUEL FROM SAID FUEL DELIVERY PASSAGEWAY, SAID BODY BEING PROVIDED WITH AN EXCESS FUEL PASSAGEWAY COUPLED TO SAID FUEL DELIVERY PASSAGEWAY AND WITH A CHAMBER IN COMMUNICATION WITH SAID EXCESS FUEL PASSAGEWAY TO PERMIT EXCESS FUEL IN SAID FUEL DELIVERY PASSAGEWAY TO BE DELIVERED TO SAID CHAMBER, SAID BODY BEING PROVIDED WITH A FUEL INLET PASSAGEWAY OPENING INTO SAID CHAMBER, SAID CHAMBER BEING OF SUBSTANTIAL SIZE RELATIVE TO THE FREELY OPEN AND EXCESS FUEL PASSAGEWAYS TO REDUCE THE PRESSURE OF SAID EXCESS FUEL DELIVERED TO SAID CHAMBER, SAID CHAMBER BEING IN COMMUNICATION WITH THE FIRST SAID PASSAGEWAY WHEREBY SAID EXCESS FUEL IS DELIVERED AT REDUCED PRESSURE TO SAID BORE DURING SAID SUCTION STROKE, AND A CONTROL VALVE OPERATIVELY DISPOSED BETWEEN SAID CHAMBER AND SAID EXCESS FUEL PASSAGEWAY FOR REGULATING COMMUNICATION THEREBETWEEN, SAID EXCESS FUEL PASSAGEWAY EXTENDING PERPENDICULARLY AWAY FROM SAID FUEL DELIVERY PASSAGEWAY, SAID BODY BEING PROVIDED WITH A FURTHER CHAMBER AND FURTHER PASSAGE CONNECTING THE EXCESS FUEL PASSAGEWAY TO THE FIRST SAID CHAMBER, SAID CONTROL VALVE BEING LOCATED IN SAID FURTHER CHAMBER, SAID FURTHER PASSAGE BEING PARALLEL TO SAID FUEL DELIVERY PASSAGEWAY.