Fuel injector for internal combustion engines

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

1997-02-06

1998-09-08

Shaver, Kevin P.

Fluid sprinkling, spraying, and diffusing

Unitary injection nozzle and pump or accumulator plunger

2395338, F02M 4702

Patent

active

058033610

ABSTRACT:
This fuel injector for internal combustion engines makes the best use of the responsiveness of a piezoelectric element and the leakage resistance and fixing easiness of a solenoid type fuel injection nozzle, and secures a sufficient lift of a control piston. In this fuel injector, a control piston is connected to and controls a sliding movement of a needle valve, and a return spring provided in a fuel chamber urges the needle valve in the injection port closing direction, the lift of the control piston being controlled by a piezoelectric element which is adapted to be displaced in accordance with voltage variation. The displacement of the piezoelectric element is increased by the effect of lever and fulcrum of a displacement increasing mechanism, and the resultant displacement is transmitted to the control piston, whereby the lift of the control piston and needle valve is secured.

REFERENCES:
patent: 3995813 (1976-12-01), Bart et al.
patent: 4728074 (1988-03-01), Igashira et al.
patent: 4909440 (1990-03-01), Mitsuyasu et al.
patent: 5630550 (1997-05-01), Kurishige et al.

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