Capacitor discharge type ignition system for internal combustion

Details Capacitor discharge type ignition system for internal combustion Capacitor discharge type ignition system for internal combustion

1993-08-10

1995-07-18

Nelli, Raymond A.

Internal-combustion engines

High tension ignition system

Using capacitive storage and discharge for spark energy

F02P 306

Patent

active

054331846

ABSTRACT:
A capacitor discharge type ignition system for an internal combustion engine capable of rendering rising of a secondary voltage rapid, prolonging a duration of a secondary discharge current, and preventing a reduction in output of an engine by incomplete combustion due to a decrease in concentration of fuel. A switching element which is rendered forcibly non-conductive such as an FET 6 is used as a discharge switch for carrying out discharge of an ignition energy accumulating capacitor 2. When an ignition signal Vi for determining each of ignition timings is generated, the FET is fed a trigger signal Vt to render the FET turned on, to thereby charges in the capacitor to be discharged through the FET to a primary winding 1a of an ignition coil 1. When the discharge current reaches a set value, the trigger signal is caused to be zero to render the FET turned off to interrupt discharge of the capacitor. Then, when a certain period of time elapses, the FET is fed with the trigger signal to restart discharge of the capacitor.

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