Capacitor discharge ignition system with inductively extended di

Details Capacitor discharge ignition system with inductively extended di Capacitor discharge ignition system with inductively extended di

1992-08-07

1993-06-22

Argenbright, Tony M.

Internal-combustion engines

High tension ignition system

Using capacitive storage and discharge for spark energy

123620, 123656, F02P 308

Patent

active

052209016

ABSTRACT:
A capacitor discharge ignition device for an internal combustion engine includes a booster coil 21 and a transistor 22 for generating a boosted voltage; a circuit 15A for generating a switching signal for the transistor in response to an ignition signal; first and second condensers 7, 8 for charging with the boosted voltage; an ignition coil 10 to whose secondary a spark plug is connected; a thyristor 13 forming a first closed discharge circuit with the first condenser and the ignition coil primary, which is turned on in synchronism with the ignition signal; and an inductor 9 forming a second closed circuit with the second condenser, the ignition coil primary and the thyristor. The discharge energy of the second condenser stored in the inductor is supplied to the ignition coil primary to extend the discharge time at the spark plug. A delay circuit 16 prevents the transistor from turning on during the extended discharge time, thus establishing a third closed inductor discharge path through the booster coil.

REFERENCES:
patent: 4922883 (1990-05-01), Iwasaki
patent: 5131376 (1992-07-01), Ward et al.

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