Ignition apparatus for internal combustion engine

Details Ignition apparatus for internal combustion engine Ignition apparatus for internal combustion engine

1993-03-12

1994-06-07

Argenbright, Tony M.

Internal-combustion engines

High tension ignition system

Using capacitive storage and discharge for spark energy

123605, F02P 306

Patent

active

053180020

ABSTRACT:
An ignition apparatus for an internal combustion engine realizes a stable ignition control by ensuring an adequate capacitor charge voltage even in a high-speed engine operation. The apparatus comprises a trigger circuit (50) which includes a pulse generator (30) for sustaining a trigger signal for a predetermined period required for a capacitor (8) to discharge, and a switch (40) for applying a voltage to a gate of a thyristor 12 by opening a short-circuit between gate and cathode thereof. The gate-cathode path of the thyristor is short-circuited upon charging of the capacitor and after discharging thereof, to thereby set a hold current for the thyristor at a high level so that after lapse of a predetermined time and a turn-off time from the beginning of the discharge of the capacitor, the DC-DC converter (2) is restarted to secure an adequate capacitor charge voltage (d).

REFERENCES:
patent: 4696280 (1987-09-01), Niggemeyer
patent: 5074274 (1991-12-01), Okuda
patent: 5183024 (1993-02-01), Morita et al.

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