Fuel injection pump

A distributor fuel pump assembly for an engine comprising:

• a housing having a first end portion, a second end portion, a first bore extending longitudinally through said first end portion defining a longitudinal axis, a second bore extending through said second end portion, a third bore in one of said first and second end portions coaxial with said first bore, and a plurality of outlet ports and inlet passage means in communication with said second bore;
• a first rotating assembly journaled for rotation in said said third bore and having a shaft rotatably extending outwardly through said first bore and an inner eccentric bore proximate said second end portion;
• a second rotating assembly rotatably and slidably positioned in said second bore;
• pump means in said second end portion for increasing the pressure of fuel communicated thereto, said pump means including a bore in said second end portion, a piston slidably positioned in said bore defining a fluid chamber at an inner end of said piston, and a slipper element positioned between said piston and said inner eccentric bore;
• first means for rotating said second rotating assembly in response to rotation of said first rotating assembly and at a speed proportional to the rotational speed of said first rotating assembly;
• second means for alternately establishing and blocking communication between said inlet passage means and said fluid chamber in response to rotation of said second rotating assembly;
• third means for periodically directing fluid from said fluid chamber to each of said outlet ports in a predetermined sequence in response to rotation of said second rotating assembly;
• fourth means for moving said second rotating assembly axially in said second bore for varying the volumetric flow of fuel directed from said fluid chamber to each of said ports;
• and
• wherein said inner eccentric bore has a circle of eccentricity defined by the center line of the eccentric bore orbiting around said longitudinal axis in response to rotation of said first rotating assembly and said bore of said pump means has a centerline angularly offset, said centerline being substantially tangent to the circle of eccentricity of the inner eccentric bore of the first rotating assembly.

A distributor fuel pump assembly for an engine comprising:

• a housing having a first end portion, a second end portion, a first bore extending longitudinally through said first end portion defining a longitudinal axis, a second bore extending through said second end portion, a third bore in one of said first and second end portions coaxial with said first bore, and a plurality of outlet ports and inlet passage means in communication with said second bore;
• a first rotating assembly journaled for rotation in said third bore and having a shaft rotatably extending outwardly through said first bore and an inner eccentric bore proximate said second end portion;
• a second rotating assembly rotatably and slidably positioned in said second bore;
• pump means in said second end portion for increasing the pressure of fuel communicated thereto, said pump means including a bore in said second end portion, a piston slidably positioned in said bore defining a fluid chamber at an inner end of said piston, and a slipper element positioned between said piston and said inner eccentric bore;
• first means for rotating said second rotating assembly in response to rotation of said first rotating assembly and a speed proportional to the rotational speed of said first rotating assembly;
• second means for alternately establishing and blocking communication between said inlet passage means and said fluid chamber in response to rotation of said second rotating assembly;
• third means for periodically directing fluid from said fluid chamber to each of said outlet ports in a predetermined sequence in response to rotation of said second rotating assembly;
• fourth means for moving said second rotating assembly axially in said second bore for varying the volumetric flow of fuel directed from said fluid chamber to each of said ports;
• and
• wherein said slipper element is an annular ring.

A distributor fuel pump assembly for an engine comprising:

• a housing having a first end portion, a second end portion, a first bore extending longitudinally through said first end portion defining a longitudinal axis, a second bore extending through said second end portion, a third bore in one of said first and second end portions coaxial with said first bore, and a plurality of outlet ports and inlet passage means in communication with said second bore;
• a first rotating assembly journaled for rotation in said third bore and having a shaft rotatably extending outwardly through said first bore and an inner eccentric bore proximate said second end portion;
• a second rotating assembly rotatably and slidably positioned in said second bore;
• pump means in said second end portion for increasing the pressure of fuel communicated thereto, said pump means including a bore in said second end portion, a piston slidably positioned in said bore defining a fluid chamber at an inner end of said piston, and a slipper element having an inner surface positioned between said piston and said inner eccentric bore;
• first means for rotating said second rotating assembly in response to rotation of said first rotating assembly and at a speed proportional to the rotational speed of said first rotating assembly;
• second means for alternately establishing and blocking communication between said inlet passage means and said fluid chamber in response to rotation of said second rotating assembly;
• third means for periodically directing fluid from said fluid chamber to each of said outlet ports in a predetermined sequence in response to rotation of said second rotating assembly;
• fourth means for moving said second rotating assembly axially in said second bore for varying the volumetric flow of fuel directed from said fluid chamber to each of said ports;
• and
• means for maintaining said slipper element in sliding contact with said inner eccentric bore, said maintaining means including an arcuate groove in the inner surface of said slipper element and an annular ring slidably positioned within said groove.

A distributor fuel pump assembly for an engine comprising:

• a housing having a first end portion, a second end portion, a first bore extending longitudinally through said first end portion defining a longitudinal axis, a second bore extending through said second end portion, a third bore in one of said first and second end portions coaxial with said first bore, and a plurality of outlet ports and inlet passage means in communication with said second bore;
• a first rotating assembly journaled for rotation in said third bore and having a shaft rotatably extending outwardly through said first bore and an inner eccentric bore proximate said second end portion;
• a second rotating assembly rotatably and slidably positioned in said second bore;
• pump means in said second end portion for increasing the pressure of fuel communicated thereto, said pump means including a pair of bores in said second end portion, a pair of pistons slidably positioned in said bores defining a fluid chamber at an inner end of each of said pistons, and a pair of slipper elements positioned between said pistons and said inner eccentric bore;
• first means for rotating said second rotating assembly in response to rotation of said first rotating assembly and at a speed proportional to the rotational speed of said first rotating assembly;
• second means for alternatively establishing and blocking communication between said inlet passage meaans and said fluid chambers in response to rotation of said second rotating assembly;
• third means for periodically directing fluid from said fluid chambers to each of said outlet ports in a predetermined sequence in response to rotation of said second rotating assembly;
• fourth means for moving said second rotating assembly axially in said second bore for varying the volumetric flow of fuel directed from said fluid chambers to each of said ports;
• and
• wherein said inner eccentric bore has a circle of eccentricity defined by the centerline of the eccentric bore orbiting around said longitudinal axis in response to rotation of said first rotating assembly, and each of said bores of said pump means has a centerline angularly offset, said centerline being substantially tangent to the circle of eccentricity of the inner eccentric bore of the first rotating element, said slipper elements each having an outer arcuate surface in sliding engagement with said inner eccentric bore, an inner surface, a spherical groove in said inner surface concentric with the inner eccentric bore, each of said pistons having a spherical surface on its outer end, said spherical surface being seated in said spherical groove and having a radius substantially equal to the radius of said spherical groove.

A distributor fuel pump assembly for an engine comprising:

• a housing having a bore defining a longitudinal axis, and a plurality of outlet ports and inlet passage means in communication with said bore;
• a metering rotor rotatably and slidably positioned within said bore;
• a rotating assembly rotatable relative to said housing and having an eccentric bore, said eccentric bore having a circle of eccentricity defined by the centerline of the eccentric bore orbiting around said longitudinal axis in response to rotation of said rotating assembly;
• a second bore in said housing and having a centerline angularly offset and being substantially tangent to said circle of eccentricity;
• a piston slidably positioned in said second bore defining a fluid chamber at an inner end of said piston;
• a slipper element positioned between said piston and said eccentric bore;
• first means for rotating said metering rotor in response to rotation of said rotating assembly and at a speed proportional to the rotational speed of said rotating assembly;
• second means for alternately establishing and blocking communication between said inlet passage means and said fluid chamber in response to rotation of said metering rotor;
• third means for periodically directing fluid from said fluid chamber to each of said outlet ports in a predetermined sequence in response to rotation of said rotating assembly;
• and
• fourth means for moving said metering rotor axially in said bore for varying the volumetric flow of fuel directed ffrom said fluid chamber to each of said outlet ports.