Diesel fuel injection system

Patent · Tue Apr 22 00:00:00 EST 1986

OSTI ID:5637224

Schechter, M M; Simko, A O

A fuel injection pump is described of the multiple plunger spill port type for an automotive type internal combustion engine, the pump including at least four axially spaced engine camshaft driven pump plungers grouped in pairs and sequentially and in succession moved in one direction through a fuel pumping stroke and oppositely through a fuel intake stroke. A fuel pressurization/supply chamber is contiquous to the end of each plunger for pressurization of the fuel therein or supply of fuel thereto from a supply passage upon coordinate movement of the plunger, fill/spill passage means connected to a single fuel return spill port and in parallel flow relationship to each of the plunger bores as a function of the position of the plungers, each plunger having a pair of internal passages connected at all times to its chamber and alternately alignable with the supply or fill/spill passage means as a function of the position of the plunger. A fuel discharge passage is operatively connecting each of the chambers to an individual engine cylinder, a single spill port control valve movable to block or permit the spill of fuel through the spill port to a return line to control the pressurization of fuel in all of the fuel chambers and associated discharge passages, a single solenoid connected to the spill control valve for moving it to block or unblock the spill port, and a single shuttle valve operatively associated with all of the fill/spill passage means and spill port reciprocably movable between positions to sequentially connect the plunger chambers one at a time in succession to the spill port during the pumping pressurization stroke of its plunger for the injection of fuel to an individual cylinder while the other chambers are in various stages of being refilled with fuel and preparing for pressurization upon successive actuation of the plungers by the camshaft.

• Assignee: Ford Motor Co., Dearborn, MI
• Patent Number(s): US 4583509
• OSTI ID: 5637224
• Resource Relation: Patent File Date: Filed date 7 Jan 1985
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
DIESEL ENGINES
FUEL INJECTION SYSTEMS
DESIGN
CYLINDERS
POSITIONING
PRESSURIZING
PUMPS
SHAFTS
SOLENOIDS
VALVES
VEHICLES
CONTROL EQUIPMENT
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
FUEL SYSTEMS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MACHINE PARTS
330102* - Internal Combustion Engines- Diesel