Internal-combustion engines – Charge forming device – Having fluidic logic control means
Patent
1980-08-01
1983-04-05
Cox, Ronald B.
Internal-combustion engines
Charge forming device
Having fluidic logic control means
123489, 328 69, 307494, F02B 3300, F02M 700
Patent
active
043787738
ABSTRACT:
A feedback control system in which the error signal is oscillated by a dither signal having a periodical pattern for oscillating the controlled output. The dither signal comprises a plurality of positive excursions and negative excursions, and at least one of the positive excursions is lower than the others and at least one of the negative excursions is shallower than the others. The dither signal is applied to an actuator to produce controlled output. A detector senses a value of the controlled output caused by the operation of the actuator. The detector is adapted to produce an output signal in which portions corresponding to at least the low positive excursion or shallow negative excursion of the dither signal are removed when the controlled output deviates from a desired value in different directions. A comparing circuit compares the output signal of the detector with the dither signal for detecting the removed portions. The output signal is fed to a shift signal generating circuit for shifting the dither signal for correcting the deviation of the value of the controlled output.
REFERENCES:
patent: 3676782 (1972-07-01), Lane
patent: 3900012 (1975-08-01), Wahl
"Signal Stabilization of a Control System", Rufus Oldenberger, ASME Transactions, 11/75, pp. 1869-1872.
Cox Ronald B.
Farber Martin A.
Fuji Jukogyo Kabushiki Kaisha
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