Fuel injector for internal combustion engines

Details Fuel injector for internal combustion engines Fuel injector for internal combustion engines

1985-12-18

1987-06-02

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

Fluid pressure responsive discharge modifier* or flow...

Fuel injector or burner

2395338, 2395339, F02M 4700, F02M 6120

Patent

active

046696687

ABSTRACT:
A fuel injector for internal combustion engines comprising an improved valve structure whose valve-opening pressure is directly proportional to the fuel pressure. The fuel injector includes a nozzle holder having a valve seat, a needle valve moveably mounted in the nozzle holder and biased against the valve seat by a nozzle spring acting on a moveable spring seat fitted therebetween, a plunger moveably mounted in the nozzle holder and having one end on which fuel pressure acts, an actuator rod disposed between the plunger and moveable spring seat with a small distance provided between the actuator rod and the spring seat, and a plunger spring acting on the plunger to urge the latter against the fuel pressure acting on the plunger. The plunger spring is stronger than the nozzle spring acting on the needle valve, such that the needle valve is lifted by the small distance until the fuel pressure acting on the needle valve exceeds a combined force of the force of the nozzle spring and the fuel pressure acting on the plunger. Thereafter, as the fuel pressure increases, the nozzle valve is further lifted by a valve-opening pressure which is directly proportional to the fuel pressure.

REFERENCES:
patent: 4081140 (1978-03-01), Kranc
patent: 4225088 (1980-09-01), Kulke et al.
patent: 4285471 (1981-08-01), Eblen et al.
patent: 4448356 (1984-05-01), Nakajima et al.
patent: 4461427 (1984-06-01), Kopse et al.
patent: 4572434 (1986-02-01), Seifert

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