A regulator device for a variable rate of flow for a fuel injection pump for an internal combustion engine

Claim 1

In a regulator device for a variable rate flow for a fuel injection pump for a water cooled internal combustion engine, a throttle, a three-dimensional cam capable of displacement in two different direction according to the engine r.p.m. and the position of the throttle, a feeler member rotatable about a fixed axis, said feeler member being maintained in contact with the periphery of the cam, and correcting means located between the feeler 1 member and a movable component of the fuel injection pump serving to vary the fuel flow rate, (said correcting means comprising an auxiliary), said correcting means comprising an auxiliary lever, a pivot for the auxiliary lever at one end thereof, 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 the auxiliary lever, a first lever rigidly rotatable with the feeler member, a second lever rotatable about the fixed axis, the projection of the auxiliary lever being located between a surface of the first lever and a surface of the second lever, means connecting the second lever to the movable component of the fuel injection pump, the pivot of the auxiliary lever being displaceable whereby substantial components of such displacement are in a direction parallel to said two surfaces, thermostatic means sensitive to the temperature of the engine cooling water, the displacements of the pivot of the auxiliary lever being executed from the thermostatic means through a lever arm as a function of the proper temperature of the internal combustion engine, the shapes of said two surfaces being such as to contact the 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, said three-dimensional cam being provided with a U-shaped link block, a cylindrical rod slidably engaged in the link block so that the axial displacements of the three-dimensional cam can take place, while any rotation of said cam is controlled by said rod, a third lever rotatable about the same rotation axis of the three-dimensional cam, said cylindrical rod rigidly protruding from said lever, linkage means between the third lever and the throttle whereby any rotation of the throttle causes a corresponding rotation of the third lever and of the three-dimensional cam, and the free end of said third lever being engaged from said lever arm when the running temperature of the engine is below the normal value under the control of said thermostatic means.