Fuel injection valve for internal combustion engines

Patent · Tue Jan 13 04:00:00 EST 1987

OSTI ID:6987448

Ishibashi, T

A fuel injection valve is described for an internal combustion engine, comprising: a nozzle holder having a fuel inlet port formed therein and connected to an injection pipe extending from a fuel injection pump; a nozzle body supported by the nozzle holder and having at least one nozzle hole and a pressure chamber formed therein at an end thereof remote from the nozzle holder. The pressure chamber is more remote from the injection pipe than the fuel inlet port. A fuel passage means is formed in the nozzle holder and the nozzle body and extends between the fuel inlet port and the pressure chamber. A nozzle needle is mounted within the nozzle body and liftable and returnable to open and close the nozzle hole, respectively, in response to an increase and a decrease in the pressure of fuel supplied into the pressure chamber. A nozzle spring means urges the nozzle needle in a direction of closing the nozzle hole. A central plunger is disposed in the nozzle holder for displacement in unison with the nozzle needle through a whole lifting stroke thereof. The central plunger has one end remote from the nozzle needle, the one end having an end face thereof disposed to receive pressure within the injection pipe through the fuel inlet port to thereby impart an urging force to the nozzle needle in the direction of closing the nozzle hole.

• Assignee: Diesel Kiki Co., Ltd., Tokyo
• Patent Number(s): US 4635854
• OSTI ID: 6987448
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CONTROL
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
HEAT ENGINES
INTAKE STRUCTURES
INTERNAL COMBUSTION ENGINES
MECHANICAL STRUCTURES
NOZZLES
PIPES
PRESSURE CONTROL
PRESSURE REGULATORS
PUMPS
VALVES