Fuel injection pumping apparatus

A fuel injection pumping apparatus for supplying fuel to an internal combustion engine comprising an injection pump, a feed pump for supplying fuel under pressure to the injection pump, an axially movable member disposed in a surrounding body, an adjustable orifice defined by the member and body the size of said orifice determining the amount of fuel supplied to the engine at each injection stroke by the injection pump, a pivotal centrifugal weight acting on one end of the member and urging the member in an axial direction to reduce the size of said orifice, a governor spring acting to urge the member against the action of said weight, operator adjustable means for varying the force exerted by said spring whereby the weight, spring and orifice together constitute a governor to control the speed of the associated engine in accordance with the setting of the operator adjustable means, a reaction member for the pivot of said weight, resilient means, said resilient means acting to urge the reaction member and pivot in opposition to said governor spring, and a dash-pot acting to limit the rate of movement of the reaction member against the action of said resilient means when the force exerted by the governor spring is increased, a valve controlled passage in communication with the chamber of the dash-pot through which liquid can enter the dash-pot chamber at a substantially unrestricted rate.