Fuel injector for internal combustion engine having throttle por

Details Fuel injector for internal combustion engine having throttle por Fuel injector for internal combustion engine having throttle por

1994-03-11

1995-09-26

Grant, Willam

Fluid sprinkling, spraying, and diffusing

Fluid pressure responsive discharge modifier* or flow...

Fuel injector or burner

239584, F02M 5106

Patent

active

054528585

ABSTRACT:
A fuel injector wherein a piston driven by the extension and contraction of a piezoelectric actuator changes the pressure of a working fluid in a variable pressure chamber and back pressure chamber so as to drive a needle valve to open and close a fuel injection hole, wherein undesirable secondary injection after a main injection in prevented by providing a throttle portion for narrowing the communicating passage between the variable pressure chamber and back pressure chamber when the piston moves forward and the needle valve closes the fuel injection hole.

REFERENCES:
patent: 4006859 (1977-02-01), Thoma
patent: 4535743 (1985-08-01), Igashira et al.
patent: 4579283 (1986-04-01), Igashira et al.
patent: 4646976 (1987-03-01), Rembold et al.
patent: 4725002 (1988-02-01), Trachte
patent: 4728074 (1988-03-01), Igashira et al.
patent: 4909440 (1990-03-01), Mitsuyasu et al.
patent: 5219122 (1993-06-01), Iwanaga
patent: 5323964 (1994-06-01), Doszpoly et al.

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