Wide-gap ignition distributor

Details Wide-gap ignition distributor Wide-gap ignition distributor

1982-08-12

1984-10-09

Cox, Ronald B.

Internal-combustion engines

Igniters

Sparkers

200266, 200 19DR, 200 19DC, F02P 100

Patent

active

044754914

ABSTRACT:
In order to make possible the lower level of electrostatic disturbance that accompanies the use of a wider than usual gap in an ignition distributor without undesirable increase of the ignition pulse voltage, the distributor electrode and/or the fixed ignition circuit electrodes of the distributor are made at least in part of a material that requires less energy for pulling out an electron and has a higher secondary electron emission capability than the usual brass plate used for the contact plate at the axis of revolution of the distributor rotor, to which a carbon brush is usually provided for making contact. Alloy additions of calcium oxide or barium oxide or silicon to brass have a suitable effect and an alloy containing silicon and preferably also aluminum and calcium is preferred. The gap width is between 3 and 5 mm, preferably about 4 mm for normal motor vehicle engine application.

REFERENCES:
patent: 4007342 (1977-02-01), Makino
patent: 4074090 (1978-02-01), Hayashi
patent: 4091245 (1978-05-01), Komiyama
patent: 4208554 (1980-06-01), Sprague
patent: 4217470 (1980-08-01), Kirner
patent: 4308436 (1981-12-01), Sone et al.
patent: 4332988 (1982-06-01), Dungan
patent: 4354070 (1982-10-01), Sone et al.
patent: 4409295 (1983-10-01), Smith et al.

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