Air-assist fuel injection nozzle

Patent · Tue Sep 15 00:00:00 EDT 1987

OSTI ID:6116603

Klomp, E D

An air-assist fuel injection nozzle is described for use in discharging fuel into an associate combustion chamber of an internal combustion engine. The injection nozzle includes a nozzle body means. The straight walled spray tip portion has a plurality of radial discharge orifices extending. An axial bore in the body means extends from the opposite end to define a bushing, a needle plunger reciprocably received in the bushing between a fully raised position and a fully depressed position corresponding to the end of a suction stroke and the end of a pump stroke, respectively. The needle plunger has a radial supply passage and a radial discharge ports angularly aligned with the radial discharge orifices, wherein the discharge ports are in flow communication with the blind bore. The needle plunger and the interior portion of the enclosed end of the nozzle body means define a variable volume pump chamber. The nozzle body means includes a supply passage means with a check valve in fluid communication with the radial supply passage when the needle plunger is in the raised position. The opposite end of the supply passage means is to sequentially receive a metered quantity of pressurized fuel, and the needle plunger allows aeriform fluid flow from the combustion chamber into the pump chamber. The needle plunger blocks flow through the radial discharge orifices until such time as the needle plunger has moved a predetermined axial extent so that the radial discharge ports come into alignment with the radial discharge orifices to initiate an air-assist discharge of air, fuel vapors and fuel from the radial discharge orifices.

• Assignee: General Motors Corp., Detroit, MI
• Patent Number(s): US 4693420
• OSTI ID: 6116603
• Resource Relation: Patent File Date: Filed date 25 Aug 1986
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
FUEL INJECTION SYSTEMS
NOZZLES
AIR FLOW
CONICAL CONFIGURATION
DESIGN
GAS FLOW
INTERNAL COMBUSTION ENGINES
LIQUID FLOW
OPERATION
ORIFICES
PUMPS
SPRAYS
TWO-PHASE FLOW
VALVES
VAPORS
CONFIGURATION
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FLUIDS
FUEL SYSTEMS
GASES
HEAT ENGINES
OPENINGS
330100* - Internal Combustion Engines