Low power acoustic fuel injector drive circuit
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United States of America Patent
Stats
-
Sep 4, 1984
Grant Date -
N/A
app pub date -
Jun 14, 1982
filing date -
Jun 14, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An acoustic fuel injector-atomizer comprising a horn (74) actuated by piezoelectric crystals (28a, 28b) to form a resonant structure (18) excited by an oscillator signal. The oscillator (16) which generates the excitation signal is self-tuned to the resonant frequency of the structure (18) by means of a first transformer coupling (66, 56) which provides a feedback path between the structure (18) and the oscillator transistor (24) and a second transformer coupling (68, 56) which provides a compensation signal representing static capacitance of the crystals (28a, 28b). The compensation signal is subtracted from the feedback signal of the structure (18) so as to eliminate the static capacitance component as an error source in the self-tuning function.
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Cited Art Landscape
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