Regulator for gasoline injection pumps

Claim 1

In a regulator device for a variable rate of flow for a fuelinjection pump for an internal combustion engine, the threedimensional cam capable of displacement in two different directions according to the engine r.p.m. and the position of the throttle, a feeler member, a fixed pivot about which said feeler member is rotatable, said feeler member being maintained in contact with the periphery of the cam, and correcting means located between the feeler member and a movable component of the fuel-injection pump serving for varying the fuel flow rate, said correcting means comprising an auxiliary lever, a pivot for said auxiliary lever at one of its ends, with the axis of the pivot being parallel to the axis of rotation of the feeler member and adjacent to the axis, a projection at the other end of said auxiliary lever, said other end having a planar cam, a second lever, a fixed pivot for said second lever having an axis parallel and adjacent the axis of rotation of the feeler member, said projection being located between a surface of the feeler member and a surface of said second lever, means connecting said second lever to the movable component of the fuel-injection pump, means mounting said pivot of said auxiliary lever to be displaceable whereby substantial components of such displacement are in a direction parallel to said two surfaces, the displacements of the mounting means of the pivot of said auxiliary lever being executed as a function of the temperature of said internal combustion engine, the shapes of said two surfaces being such as to contact said projection for originating and increasing the rate of flow as is necessary under cold engine conditions with respect to the rate of flow corresponding to an engine running under proper conditions, a movable member, an electromagnet mechanically connected to the movable member, with said electromagnet being energized during starting of the engine whereby the auxiliary lever rotates due to said movable member contacting the planar cam, the stroke of the movable member contacting the planar cam, the stroke of the movable member being constant and the profile of the planar cam being such that only a portion of the stroke of the movable member is used for shifting the auxiliary lever with such stroke portion and thus the rotation of the auxiliary lever being a function of the displacements of the mounting means of the pivot of the auxiliary lever and thus of the temperature of the engine, and said rotation of the auxiliary lever dispensing an amount of injected fuel during the starting of the engine with such amount also being a function of the engine temperature.