Ignition system for an internal combustion engine using thyristo

Details Ignition system for an internal combustion engine using thyristo Ignition system for an internal combustion engine using thyristo

1989-11-22

1990-11-06

Nelli, Raymond A.

Internal-combustion engines

High tension ignition system

Using capacitive storage and discharge for spark energy

123604, 123594, F02P 306

Patent

active

049677187

ABSTRACT:
An ignition system for an internal combustion engine comprises a direct-current supply, at least one spark plug, an ignition coil with a primary winding and a secondary winding for connection to the supply and to the at least one plug, respectively, a first electronic switch between the primary winding and the supply, an inductor between the supply and the primary winding of the coil, a capacitor in parallel with the circuit branch including the primary winding and the first switch, a second electronic switch between the inductor and the supply and adapted to disconnect the circuit downstream of the inductor from the supply in its closed condition, and an electronic unit which controls the first and second switches in a predetermined manner. The first switch is constituted by a thyristor and, when the current flowing in the thyristor is to be cut off, the electronic control unit closes the second electronic switch and then reopens it after a time sufficient to allow the current flowing in the thyristor to fall below a predetermined value.

REFERENCES:
patent: 4455989 (1984-06-01), Endo et al.
patent: 4480624 (1984-11-01), Anderson
patent: 4515140 (1985-05-01), Enomoto et al.
patent: 4886036 (1989-12-01), Johansson et al.

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