Multiple plunger fuel injection pump

In a multiple plunger fuel injection pump for an internal combustion engine, a pump having a supply chamber and a plurality of cylinders with a plunger freely rotatable in each of said cylinders to define a plurality of pumping chambers, fuel supply means communicating with said supply chamber, each said plunger having longitudinally spaced inlet and spill ports communicating with said supply chamber, multiple control sleeve means, each said control sleeve means respectively comprising a pair of sleeves mounted for longitudinal movement about one of the plungers and cooperating with said plunger ports for controlling the injection of fuel delivered by the plunger, actuating means for actuating said sleeve means longitudinally to a position determined by the speed and load requirements of the engine to thereby control the delivery of fuel to the engine, multiple adjustment means, each said adjustment means selectively operable individually with a respective different one of said control sleeve means for longitudinally moving said control sleeve means independently of the other control sleeve means to balance said one of said control sleeve means relative to said other control sleeve means, a cam finger affixed to and extending longitudinally from one said sleeve for longitudinal contact with a cam surface facing said one sleeve at an inclined angle thereto on the other said sleeve thereby to vary the longitudinal spacing between said pair of sleeves in response to relative rotation therebetween for controlling the quantity of fuel delivered by said plunger, said actuation means comprising a member adapted to be positioned as determined by the load requirements of the engine, means for maintaining said cam finger in longitudinal contact with said cam surface, and means connecting said load positioned member to a first said sleeve of said pair for rotation of said first sleeve as determined by the load requirements of the engine, said adjustment means comprising means operably connecting the second said sleeve of said pair with said housing for selectively variably fixing the angular relationship therebetween to permit said relative rotation of said first and second sleeves.

In a multiple plunger fuel injection pump for an internal combustion engine, a pump having a supply chamber and a plurality of aligned cylinders with a plunger freely rotatable in each of said cylinders to define a plurality of pumping chambers, fuel supply means communicating with said supply chamber, each said plunger having axially spaced inlet and spill ports communicating with said supply chamber, a pair of control sleeves axially sequentially mounted for selective axial and angular movement about each of said plungers, a sleeve of said pair having a first cam surface, a sleeve of said pair having a pair of second cam surfaces on diametrically opposite sides thereof, said first and second cam surfaces facing generally axially at different relative angles and a sleeve of said pair having a rigid cam finger extending axially therefrom for contact with said first cam surface on the other sleeve of said pair;

• a first reciprocable member adapted to be moved as determined by speed of the engine and having a respective cam surface thereon for each said cylinder;
• multiple, bifurcated, third class lever means, each said bifurcated lever means mounted for pivotal motion in an axially extending plane in following contact with a respective said cam surface of said first reciprocable member and having the branch fingers thereof positioned for axially directed contact with said pair of second cam surfaces of a said sleeve of each said pair to move said sleeve pair axially as a unit for variably controlling the timing of fuel injected by the pump according to engine speed;
• a second reciprocable member adapted to be moved as determined by the load requirements of the engine and connected to a first said sleeve of each said pair for rotation thereof relative to the second said sleeve thereby to vary the axial spacing between said two sleeves for variably controlling the quantity of fuel injected by the pump according to engine load, said first sleeve including said pair of second cam surfaces thereof for said axial contact with said branch fingers of said bifurcated lever means thereby to move said sleeve pair axially as a unit for variably controlling the timing of fuel injected by the pump according to engine load;
• means for maintaining said rigid cam finger and said branched fingers in respective axial contact with said first cam surfaces and said pair of second cam surfaces;
• multiple adjustable lever arms, each said lever arm selectively pivotally rotatable about a respective pivot extending parallel a respective said plunger and operatively connected to a respective second sleeve of each said sleeve pair for selectively fixing the angular positioning of said second said sleeve during operation of said pump to balance the fuel delivery quantity of said sleeve pair relative to remaining sleeve pairs;
• and multiple adjustable fulcrum means, each said fulcrum means operably associated with a respective said bifurcated lever means and selectively adjustable axially of said sleeves during operation of said pump for selectively pivoting said lever means and moving the corresponding sleeve pair axially thereby to balance the fuel injection timing of said sleeve pair relative to the other sleeve pairs.