Low-power acoustic injector drive circuit with enhanced turn-on

Details Low-power acoustic injector drive circuit with enhanced turn-on Low-power acoustic injector drive circuit with enhanced turn-on

1983-02-28

1985-08-27

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

With means to vibrate or jiggle discharge

310316, 363 15, 123494, B05B 314

Patent

active

045373531

ABSTRACT:
An acoustic fuel injector system comprises a DC-to-DC converter (14) for supplying a regulated voltage to a frequency controlled oscillator (16) which drives the injector valve (18) or valves. The converter comprises a flyback oscillator (28) including a switching transistor (32) and a transformer (34, 36) for applying rectified current pulses of variable amplitude and occurrence rate to an output capacitor (42). A variable impedance device (50) in the input circuit to the flyback oscillator is controlled by a feedback signal (68) from the output circuit (30) to vary the cycle rate of the flyback oscillator to maintain output voltage at a desired value. The feedback signal is coupled to the oscillator control circuit input to effect a variable regulated output voltage which is relatively high upon injector turn-on but decays to a lower operating level thereafter.

REFERENCES:
patent: 3860864 (1975-01-01), Fitz
patent: 4054848 (1977-10-01), Akita
patent: 4366582 (1982-06-01), Brantley et al.

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