Ignition coil with misfire detecting capacitor for internal comb

Details Ignition coil with misfire detecting capacitor for internal comb Ignition coil with misfire detecting capacitor for internal comb

1993-04-26

1995-10-24

O'Shea, Sandra L.

Electricity: measuring and testing

Internal-combustion engine ignition system or device

Apparatus for coupling a measuring instrument to an ignition...

324393, 324126, 73116, F02P 1700, G01R 1900, F23Q 2300

Patent

active

054613167

ABSTRACT:
An ignition coil has a capacitor for detecting ignition voltage of a spark-ignition internal combustion engine to determine if misfire occurs. The ignition coil has a primary winding and a secondary winding both wound around a core. A connector section, connected to the secondary winding by a lead, is provided for receiving a high-voltage cable to transmit the secondary winding voltage current to an ignition distributor. These components are embedded integrally in an insulator resin at the time of completing the coil. A conductor is also embedded in the insulator resin such that it is located around the connector section keeping a predetermined distance therefrom and sandwiching the insulator resin, whereby a capacitor, which constitutes a capacitive divider in cooperation with a second capacitor for detecting misfire through the ignition voltage, is formed between the connector section and the conductor. A ceramic insulator can be positioned between the conductor and the connector section. The conductor can further be electrically shielded.

REFERENCES:
patent: 3538440 (1970-11-01), Galloway
patent: 3970932 (1976-07-01), Harvey
patent: 4349782 (1982-08-01), Doss
patent: 4825167 (1989-04-01), Bayba
patent: 5237278 (1993-08-01), Bumen
patent: 5293129 (1994-03-01), Ikeuchi et al.
patent: 5317267 (1994-05-01), Miyata et al.
patent: 5363046 (1994-11-01), Shimasaki et al.
Pub. (Patent Specification GB 1,137,159), Aktiengesellschaft, Dec. 1968, Improvements in or relating to the testing of shielded ignition installation.

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