Internal combustion engine ignition system

Details Internal combustion engine ignition system Internal combustion engine ignition system

1973-12-04

1976-03-23

Myhre, Charles J.

Internal-combustion engines

Igniters

Incandescent

315209T, F02P 100

Patent

active

039453626

ABSTRACT:
An internal combustion engine ignition system wherein both arc-creating and arc-maintaining voltages are applied to the spark plug or plugs through a single ignition transformer energized through a single primary circuit in the well-known "Kettering" circuit. A switch in the primary circuit, preferably a transistor, repeatedly switches "on" and "off" to create a plurality of primary current on and current off events during each ignition period. The ignition coil primary to secondary turns ratio, the duration of the current on and current off events, and the various circuit parameters are chosen (a) to create by transformer action an ignition arc-sustaining potential of sufficient magnitude to maintain a previously initiated ignition arc across the spark plug arc gap as the current builds up during each current on event; (b) to generate an initial high inductive discharge arc-striking voltage spike across the spark plug air gap when the switch is abruptly switched off at the commencement of the subsequent current off event; and (c) to create a sustained arc-maintaining voltage for the balance of the switch off event after the arc is struck due to the inductive current decrement under arcing conditions. As a consequence of this action, the arc is normally struck at the inception of the first off event and is maintained until after the last on event, and at the same time the arc may be restruck at the commencement of any of the subsequent off events should it go out.

REFERENCES:
patent: 3280809 (1966-10-01), Issler
patent: 3489129 (1970-01-01), Issler
patent: 3549944 (1970-12-01), Minks
patent: 3575154 (1971-04-01), Taylor
patent: 3593696 (1971-07-01), Guido
patent: 3725732 (1973-04-01), Thakore
patent: 3749973 (1973-07-01), Canup

Affiliated with

Also associated with

Rating

Internal combustion engine ignition system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Internal combustion engine ignition system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Internal combustion engine ignition system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1637317