Device for correcting the delivery of a distributing injection pump and pump equipped therewith

Claim 1

Device for correcting the delivery per revolution of a distributing rotary injection pump for an internal combustion engine, which pump comprises a first fixed body member and a rotary distributor located inside said body and driven by a second substantially coaxial drive shaft member which itself is driven by the engine supplied by the pump, said pump comprising at least one pumping piston disposed in a transverse bore formed in one of said first and second members, a cam borne by the other of said first and second members for slidingly driving said piston, the fixed body member being provided with distributing channels which lead to the supply injectors of the engine and which cooperate with the distributing passages borne by the rotary distributor and are capable of communicating with said bore, said distributing passages being inclined to the longitudinal direction of the distributor so that a longitudinal displacement of this distributor causes the delivery per revolution of the pump to vary, thrust means, flexible return means, stop means, and a regulator sensitive to the rotary speed of the drive shaft member for controlling the said longitudinal displacements of the distributor so that said longitudinal displacements are subjected to the action of the regulator by said thrust means, and to the opposing action of said flexible return means through the action of said stop means cooperating with said distributor, second flexible return means being provided between the distributor and said thrust means, said device also comprising linking means for linking the thrust means and the distributor and for linking the thrust means and the stop means so that longitudinal movement of the thrust means with respect to the stop means causes longitudinal movement of the distributor with respect to the stop means, said linking means being mounted so as to rotate freely with respect to said stop means.