Capacitor discharge ignition system having automatic spark advan

Details Capacitor discharge ignition system having automatic spark advan Capacitor discharge ignition system having automatic spark advan

1978-11-01

1981-07-07

Argenbright, Tony M.

Internal-combustion engines

High tension ignition system

Using capacitive storage and discharge for spark energy

123149C, F02D 306

Patent

active

042768683

ABSTRACT:
Disclosed herein is a capacitor discharge ignition system including a U-shaped magnetic core having a pair of legs, and a rotatable member including a magnet having arcuately spaced first and second pole shoes located for movement past the core legs, the second pole shoe having a length greater than the distance between the core legs and trailing the first pole shoe relative to a normal direction of rotation of the rotatable member. The ignition system also includes an ignition circuit including a charge capacitor, a switch for selectively discharging the capacitor to effect ignition, and charging, primary, and secondary windings wound on the core leg which is first approached by the magnet means during normal rotation of the rotatable member, which windings are responsive to each passage of the magnet past the core for sequentially charging the charge capacitor and operating the switch to discharge the capacitor to effect ignition so as to provide an advance in the time of ignition in response to increased rotational speed of the rotatable member. Also disclosed herein is a method of operating such an ignition system to provide automatic spark advance and to reduce engine kickback and prevent reverse engine operation.

REFERENCES:
patent: 3500809 (1970-03-01), Hohne et al.
patent: 3667441 (1972-06-01), Cavil
patent: 3722488 (1973-03-01), Swift et al.
patent: 4036201 (1977-07-01), Borson
patent: 4074669 (1978-02-01), Cavil et al.

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