Fuel injection system

Details Fuel injection system Fuel injection system

1998-02-02

2000-11-14

Thorpe, Timothy S.

Pumps

Condition responsive control of pump drive motor

By control of electric or magnetic drive motor

417322, 417383, 123498, F04B 4906, F04B 1700, F04B 908, F02M 3704

Patent

active

061461024

ABSTRACT:
A fuel injection system is provided with an interior pumping chamber (94) which is connected to a fuel inlet (98). A pumping element (90) is provided with piezoelectric elements (124) which are interspaced between electrodes (126, 128). The pumping element (90) is electrically connected to an ECU (58). Activation of the piezoelectric elements causes pumping element (90) to expand and thereby impart pressure from a pressure surface (112) which extends into the pumping chamber (94). Fuel in the pressure chamber, as a result of the piezoelectric elements is pushed from the pressure chamber and through an injection valve (116).
The applicants are reminded that formal drawings are now required. Further, as noted in the Office Action of Dec. 16, 1999, in FIG. 2, numeral 124 should be changed to indicate mounting plate 121. On drawing sheet 6, FIG. 6a and FIG. 6b should be indicated.

REFERENCES:
patent: 3598506 (1971-08-01), O'Neill
patent: 3924974 (1975-12-01), Fischbeck et al.
patent: 4748954 (1988-06-01), Igashira et al.
patent: 4821726 (1989-04-01), Tamura et al.
patent: 4899714 (1990-02-01), Schechter et al.
patent: 5192197 (1993-03-01), Culp
patent: 5482213 (1996-01-01), Matsusaka

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