Ignition system for internal combustion engine

Details Ignition system for internal combustion engine Ignition system for internal combustion engine

1982-09-29

1985-01-22

Cox, Ronald B.

Internal-combustion engines

High tension ignition system

Having engine component position sensor

123619, 123645, F02P 100

Patent

active

044945191

ABSTRACT:
A breakerless ignition system includes a resonant circuit whose oscillation is controlled by the relative position between a detector coil 2a embodied therein and a magnetically permeable rotor 1 driven by the engine, and a threshold detector 3 responsive to the oscillation signal envelope for controlling the supply of energy to an ignition coil 6 via a power switching transistor 5. To prevent false triggering of the detector due to spurious signals induced in the coil by the spark ignition firings, a monostable multivibrator 8 actuated by the trailing edge of the detector output holds the transistor deenergized for a predetermined period of time after it has been turned off. The multivibrator output may resistively ground the resonant circuit, or it may disable the transistor via an inverter 11 and AND gate 12.

REFERENCES:
patent: 3361123 (1968-01-01), Kasama
patent: 3550571 (1970-12-01), Mainprize
patent: 3587552 (1971-06-01), Varaut
patent: 3736463 (1973-05-01), Basso
patent: 4347827 (1982-09-01), Lo Cascio

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