Method for building or repairing rotary injection fuel pump piston cylinders

Patent · Tue Jun 17 04:00:00 EDT 1986

OSTI ID:5662217

Tompkins, Jr, M J; Ash, E G

A rotary fuel injection pump is described for an internal combustion engine including a housing with inlet and outlet passages, a rotor having a longitudinal axis journaled in the housing having a rotor body with angularly spaced radially extending bores and a fuel passage in communication with the inner ends of the bores having inlet and outlet ports which communicate alternately with the inlet and outlet passages during rotation of the rotor for alternately conducting fuel to and from the bores respectively, a plunger assembly for each bore comprising a pump plunger reciprocally mounted in the bore to sequentially receive charges of fuel from and deliver them to the inlet and outlet passages respectively, and a plunger operating roller and roller shoe at the outer end of the plunger having a radial position relative to the axis of the rotor, a cam ring with an inner cam contour surrounding the rotor in the plane of revolution of the rollers engageable therewith to translate the cam contour into reciprocal movement of the plungers, and a plunger stroke limit mechanism for limiting the outward stroke of the plungers and thereby regulate the quantity of fuel injected during each inward pumping stroke thereof, a timing advance connector connected to the cam ring for changing the radial position of the lobes in the plane of revolution of the rollers relative to the rollers to thereby advance or retard the fuel injection depending upon the position of the cam ring, a timing means controlling the movement of a hydraulic timing piston mounted in a cylinder which moves the connector.

• Assignee: NOV; EDB-86-135925; NOV-85-016406
• Patent Number(s): US 4594988
• OSTI ID: 5662217
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
COATINGS
CONSTRUCTION
CYLINDERS
ENGINES
EQUIPMENT
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
HEAT ENGINES
HYDRAULIC EQUIPMENT
INTERNAL COMBUSTION ENGINES
MOTION
PISTONS
POSITIONING
PUMPING
PUMPS
REPAIR
ROTATION
ROTORS
SPACE DEPENDENCE
TIMING PROPERTIES