Electronic ignition system with mechanical advance

Details Electronic ignition system with mechanical advance Electronic ignition system with mechanical advance

1980-03-17

1982-06-08

Argenbright, Tony M.

Internal-combustion engines

Combustion chamber means combined with air-fuel mixture...

1231465A, 123617, 200310, 310 70R, F02P 504, F02P 702

Patent

active

043334334

ABSTRACT:
A mechanical structure for an ignition controller (20) for an electronic ignition system, including structure for a sensing coil carrier, a trigger rotor, and a mechanical advance mechanism is disclosed. The sensing coil carrier (28) is pivotably mounted to a shaft (22) of the ignition controller (20), and holds a sensing coil (30) a fixed radial distance from the shaft. A trigger rotor (26) having a generally circular configuration with two circumferential walls (90, 92) forming a groove, with a metallic channel member (96) embedded in the groove, is fixed to the shaft (22), so that the sensing coil carrier (28) and the trigger rotor (26) are both referenced to the same axis. The mechanical advance mechanism (24) uses identical springs (60) for primary advance, and a self centering spring (66) for secondary advance, thereby eliminating unbalanced loading that results in hysteresis in ignition advance. Advance weights (54) are fitted with involute gear teeth (114), mating with teeth on the trigger rotor, to provide an ignition advance utilizing rolling contact for minimum friction and wear. The disclosed embodiment of the invention is adapted for use on a motorcycle, and does not include a distributor mechanism, although such a mechanism maybe easily incorporated for use on a automobile engine.

REFERENCES:
patent: 1967445 (1934-07-01), Mallory
patent: 2167694 (1939-08-01), Spengler
patent: 3447004 (1969-05-01), Falge
patent: 4037577 (1977-07-01), Gallo

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