Contactless ignition system for internal combustion engine

Details Contactless ignition system for internal combustion engine Contactless ignition system for internal combustion engine

1981-01-22

1982-12-07

Argenbright, Tony M.

Internal-combustion engines

High tension ignition system

Having dwell control

123644, F02P 304

Patent

active

043621449

ABSTRACT:
A contactless ignition system for an internal combustion engine comprises a signal generator generating an AC signal synchronously with the rotation of the engine, a resistor detecting primary current supplied to an ignition coil, a circuit detecting the rising time of the primary current until the primary current attains a predetermined level, and a circuit producing a signal proportional to the rotational speed of the engine. On the basis of the signal indicative of the rising time of the primary current supplied to the ignition coil and the signal proportional to the rotational speed of the engine, an off-time control signal for controlling the off-time of the ignition coil is generated in which the ratio between the duration of the primary current supplied to the ignition coil, being maintained at the predetermined level, and the ignition period is maintained constant. The off-time of the ignition coil is controlled only when the rotational period of the engine is shorter than a predetermined setting.

REFERENCES:
patent: 3605713 (1971-09-01), Le Masters et al.
patent: 3831571 (1974-08-01), Weber
patent: 3882840 (1975-05-01), Adamian et al.
patent: 3937193 (1976-02-01), Kim
patent: 4167927 (1979-09-01), Mikami et al.
patent: 4228779 (1980-10-01), Wetzel

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