Device for limiting the delivery per revolution of an injection pump

Claim 1

In a fuel injection pump for an internal combustion engine, in which pump there is provided an adjusting rack member for adjusting the delivery per revolution, controlled by a regulator which is driven by the engine supplied by the pump, a device for limiting the delivery of the pump per revolution comprising: retractable stop means for selectively limiting the stroke of said adjusting rack member so that the delivery per revolution does not exceed a full load value, said retractable stop means comprising an articulated member pivotably movable between limiting and nonlimiting positions, said articulated member having two ends, one of thesE ends being pivotally mounted on an articulation, means for adjusting the position of said articulation along the direction of said rack member, said articulated member having a portion forming a stop abutment for the rack member when the articulated member is in its limiting position; automatic control means for the selective retraction of said stop means to the nonlimiting position on the starting of the engine, to enable the delivery per revolution to assume values greater than that of full load, said control means having an axis situated substantially in the plane of movement of the articulated member; said control means including a linking means between a movable element of said control means and a portion of said articulated member, said linking means allowing a limited degree of free angular movement of the articulated member relative to the movable element; and guiding means to keep the articulated member in a plane parallel to the axis of the control means and to the axis of the rack member.