Fuel injection pumps comprising a distributing valve for use with five cylinders intenal combustion engines

Claim 1

A FUEL INJECTION PUMP OF USE WITH AN INTERNAL COMBUSTION ENGINE HAVING FIVE CYLINDERS, WHICH PUMP COMPRISES, IN COMBINATION, A BODY PROVIDED WITH THREE RADIAL CYLINDRICAL BORES, THREE PISTONS FITTING SLIDABLY IN SAID BORES SO AS TO FORM THEREWITH THREE PUMP CHAMBERS RESPECTIVELY, AN ANNULAR CAM HAVING FIVE LOBES COAXIALLY SURROUNDING SAID BODY AND ADAPTED TO COOPERATE WITH SAID PISTONS, SAID BODY AND SAID CAM BEING ADAPTED TO ROTATE WITH RESPECT TO EACH OTHER IN SYNCHRONISM WITH SAID INTERNAL COMBUSTION ENGINE TO ACTUATE SAID PISTONS IN SAID BORES RESPECTIVELY, AND A DISTRIBUTING VALVE OPERATING IN RESPONSE TO THE RELATIVE ROTATION OF SAID BODY AND SAID CAM AND PROVIDED WITH A CENTRAL PASSAGE COMMUNICATING WITH THE WHOLE OF SAID PUMP CHAMBERS, TWO OF SAID BORES BEING OF EQUAL RESPECTIVE CROSS SECTIONS AND HAVING THEIR RESPECTIVE AXIS DISPOSED AT AN ANGLE OF ABOUT 72* AND THE THIRD BORE BEING OF A LARGER CROSS SECTION EQUAL TO APPROXIMATELY 1.6 TIMES THE CROSS SECTION OF EACH OF THE TWO FIRST MENTIONED BORES, THE AXIS OF SAID THIRD MENTIONED BORE BEING DISPOSED ALONG THE BISECTRIX OF THE ANGLE MADE BY THE RESPECTIVE AXES OF THE TWO FIRST MENTIONED BORES.