Automatic ignition timing advancing device in ignition system

Details Automatic ignition timing advancing device in ignition system Automatic ignition timing advancing device in ignition system

1978-01-31

1979-06-12

Myhre, Charles J.

Internal-combustion engines

Igniters

Sparkers

123149R, 123149F, 310 70R, F02P 508

Patent

active

041577027

ABSTRACT:
A device for automatically advancing the ignition timing in an ignition system for an internal combustion engine is disclosed, in which the ignition timing is fixed constant in a low speed range of the rotation of the engine, advanced in an intermediate speed range lower than a predetermined rotary speed, and fixed constant again in a high speed range higher than the predetermined rotary speed. In this automatic ignition timing advancing device, a positive pulse signal generated at a first phase corresponding to the ignition timing in the low speed range, a negative pulse signal generated at a second phase corresponding to the ignition timing in the high speed range, and a positive voltage signal having an amplitude increasing with time in the phase range including the first phase and second phase are combined to provide a composite signal used as a control signal for controlling the ignition timing. The negative pulse signal has a large pulse width so that the peak value of the control signal waveform appearing on the leading side of the second phase can be reduced to a level lower than a predetermined level.

REFERENCES:
patent: 3447521 (1969-06-01), Piteo
patent: 3619634 (1971-11-01), Burson
patent: 3651795 (1972-03-01), Noddin
patent: 3667441 (1972-06-01), Cavil
patent: 3722488 (1973-03-01), Swift et al.
patent: 3809040 (1974-05-01), Burson et al.
patent: 3866589 (1975-02-01), Haubner et al.
patent: 3951123 (1976-04-01), Haubner et al.

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