Ignition timing correcting system for internal combustion engine

Details Ignition timing correcting system for internal combustion engine Ignition timing correcting system for internal combustion engine

1982-09-22

1983-10-18

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

123625, 123424, 123406, F02P 504

Patent

active

044099436

ABSTRACT:
An ignition timing correcting system for generating a reference signal at a reference angular position of a rotating internal combustion engine, and having an ignition signal leading it by a constant phase. In response to a control signal from a movable tap on a potentiometer, the ignition signal is retarded in phase to form a retarded ignition signal. The phase comparison of the two signals produces an advance or a retardation signal formed of a pulse train having a pulse width corresponding to the phase difference there-between. During the idling of the engine, the correcting signal drives an electric reversible motor in either a forward or reverse direction so as to move the tap on the potentiometer to adjust the control signal after the correcting signal has been converted to a driving pulse having a longer pulse width when correcting in a direction to correct an advance of said signal than the pulse width when correcting in a direction to correct a retardation of said signal with respect to the phase difference.

REFERENCES:
patent: 3815560 (1974-06-01), Wahl et al.
patent: 3990417 (1976-11-01), Tershak
patent: 4079709 (1978-03-01), Schuette
patent: 4142489 (1979-03-01), Menard
patent: 4373487 (1983-02-01), Komurasaki et al.

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