Fuel injection pumps for internal combustion engines

Claim 1

A fuel injection pump of the kind intended for supplying fuel to internal combustion engines and comprising a body part, a distributor member rotatable within the body part and adapted to be driven in timed relationship with an associated engine, a transverse bore in the distributor member, a pair of pumping plungers reciprocally mounted within the bore, a pair of shoes slidable in radial slots at the outer ends of said bore, said shoes engaging the plungers during inward movement of the shoes, cam engaging means carried by said shoes, an annular cam ring surrounding said distributor, cam lobes formed on the internal periphery of said cam ring and engaging with said cam engaging means during rotation of the distributor member to impart inward movement to said shoes and plungers, fuel delivery means for conveying fuel displaced from said bore to a plurality of fuel outlets in turn, fuel inlet means for supplying fuel to said bore during the periods when the plungers can move outwardly, a carrier member axially slidable on the distributor member, slots in the carrier member in which are located said shoes respectively whereby axial movement of the carrier members will effect axial movement of said shoes, the cam lobes having a different profile throughout their axial length, whereby the extent of outward movement of the plungers is dependent upon the axial setting of said carrier member.