Fuel injection valve operated by expansion and contraction of pi

Details Fuel injection valve operated by expansion and contraction of pi Fuel injection valve operated by expansion and contraction of pi

1994-05-27

1996-01-09

Weldon, Kevin P.

Fluid sprinkling, spraying, and diffusing

Including valve means in flow line

Reciprocating

B05B 130

Patent

active

054822130

ABSTRACT:
A fuel injection valve comprises a valve body having a injection port at an edge thereof, a needle valve member interposed in the valve body and opening or closing the injection port, a first spring member for energizing the needle valve member in a one direction, a piezoelectric device being a piezoelectric element having a cylindrical body mounted on the interior of the valve body in a condition that a positive or negative voltage is applied, and controlling the needle valve member in the direction of opening the injection port by applying a voltage changed over positively or negatively at the time of fuel injection while pushing the needle valve member in the opposite direction in response to the energizing direction of the first spring member, and a second spring member for providing a larger energizing force than the energizing force of the first spring member described above and being interposed between the valve body and the piezoelectric device described above. The fuel injection valve described above has a high durability and a large amount of fuel injection and is compact.

REFERENCES:
patent: 4101076 (1978-07-01), Bart
patent: 4669660 (1987-06-01), Weber et al.
patent: 4725002 (1988-02-01), Trachte
patent: 4728074 (1988-03-01), Igashira et al.
patent: 4907748 (1990-03-01), Gardner et al.
patent: 4909440 (1990-03-01), Mitsuyasu et al.

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