Fuel injection nozzle for internal combustion engines

Details Fuel injection nozzle for internal combustion engines Fuel injection nozzle for internal combustion engines

1986-02-25

1987-12-29

Spar, Robert J.

Fluid sprinkling, spraying, and diffusing

Fluid pressure responsive discharge modifier* or flow...

Fuel injector or burner

F02M 6120

Patent

active

047155426

ABSTRACT:
A fuel injection nozzle for internal combustion engines comprises a nozzle needle (2) guided in a nozzle body (1) and loaded by a helical pressure spring (4). The nozzle needle (2) moves under the pressure of the fuel out of its closure position onto a stop (6) which in turn is loaded by a further but stronger helical pressure spring (7) and limitedly displaceable against the force thereof. The stronger helical pressure spring (7) surrounds the weaker helical pressure spring (4) and the fuel flows through a bore (5) parallel to the spring axis. To achieve a reduction of the external diameter of the injection nozzle in the region of the two springs (4, 7) the latter arranged eccentrically rather than coaxially. Furthermore, between them a preferably likewise eccentric bush (8) is provided through which in the region of its greatest wall thickness the bore (5) for the inflowing fuel extends.

REFERENCES:
patent: 3499607 (1970-03-01), Thomson
patent: 3627209 (1971-12-01), Scott
patent: 3820723 (1974-06-01), Shipinski
patent: 4168804 (1979-09-01), Hofmann
patent: 4436247 (1984-03-01), Akagi
patent: 4506833 (1985-03-01), Yoneda et al.
patent: 4516729 (1985-05-01), Fussner et al.

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