Spark ignition systems for internal combustion engines

Details Spark ignition systems for internal combustion engines Spark ignition systems for internal combustion engines

1976-06-01

1978-02-28

Myhre, Charles J.

Internal-combustion engines

Igniters

Incandescent

1231465A, F02P 102

Patent

active

040759970

ABSTRACT:
A spark ignition system includes a variable reluctance pick-up providing the input signal to a saturating amplifier which includes a feedback path constituted by a capacitor and a resistor in series. This amplifier has a transfer function while it is being driven towards saturation, such that its output is the sum of an integral part and a proportional part and does not saturate as a result of oscillatory high frequency spurious signals since these have a low integral. A resistor in the input of the amplifier is shorted out by a diode connected transistor when the polarity of the signal from the pick-up reverses, to increase the gain of the amplifier while it is being driven towards de-saturation, such change of polarity signalling production of a spark.

REFERENCES:
patent: 3791364 (1974-02-01), Saita
patent: 3831570 (1974-08-01), Compton et al.
patent: 3838672 (1974-10-01), Richards et al.
patent: 4030469 (1977-06-01), Chateau
Millman & Taub: Pulse, Digital & Switching Waveforms, pp. 192-212, .COPYRGT. 1965.

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