Combustion – Timer – programmer – retarder or condition responsive control – By combustion or combustion zone sensor
Patent
1992-05-08
1993-11-23
Yeung, James C.
Combustion
Timer, programmer, retarder or condition responsive control
By combustion or combustion zone sensor
431 63, 431 76, F23N 508
Patent
active
052638510
ABSTRACT:
A combustion control system for a burner having an analog circuit unit which includes a photosensor for detecting combustion flame of the burner, an amplifier for amplifying a detection output from the photosensor, a rectifier for rectifying the amplified signal to a DC component, and an integrator for smoothing the rectified signal to obtain an oscillating power signal. The control system further has a potentiometer for generating an output voltage corresponding to a degree of opening of a fuel flow control valve of the burner, a digital circuit unit supplied with an output signal from the potentiometer and an output signal from the integrator to compare these signals with a plurality of preset combustion state reference values and to output a normal combustion state signal, an incomplete combustion state signal or a flame failure signal in accordance with the result of the comparison, and a controller for outputting either a burner combustion maintaining signal or a burner combustion suspending signal on the basis of the output signal from the digital circuit unit.
REFERENCES:
patent: 4410266 (1983-10-01), Seider
patent: 4477245 (1984-10-01), Giachino et al.
patent: 4934926 (1990-06-01), Yamazaki et al.
patent: 5049063 (1991-09-01), Kishida et al.
Toyota Technical Review, vol. 41, No. 2, Dec. 1991, entitled "Study of an Optical Frequency Type Combustion Control Method".
Extract of Advance scripts for 29th Combustion Symposium, held at National Kyoto International Hall on Dec. 9, 1991.
Hosome Kazunari
Iida Syuji
Tachibana Toshiji
Tomatu Kazuya
Toyota Jidosha & Kabushiki Kaisha
Yeung James C.
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