Ignition time controlling device in contactless ignition devices

Details Ignition time controlling device in contactless ignition devices Ignition time controlling device in contactless ignition devices

1983-04-26

1985-04-23

Argenbright, Tony M.

Internal-combustion engines

Engine speed regulator

Engine speed reduction by partial or complete omission of...

123149D, 123418, 123644, F02P 308, F02P 504

Patent

active

045123039

ABSTRACT:
An ignition time controlling device having a trigger circuit employing a programmable unijunction transistor which will be ON at a timing when a primary short-circuiting current of an ignition coil is at or a little past a peak. The device includes a charging and discharging circuit for the primary short-circuiting current; a switching controlling circuit interrupting the primary short-circuiting current when the trigger circuit is ON; an ignition coil inducing a high voltage in a secondary coil when the primary short-circuiting current is interrupted; a spark plug generating a spark on receiving the high voltage of the secondary winding and an angle advancing circuit connected between the programmable unijunction transistor and the switching controlling circuit. The angle advancing circuit breaks over at a set value of the primary short-circuiting current or the voltage on the primary winding of the ignition coil and operates the switching controlling circuit prior to the operation of the programmable unijunction transistor.

REFERENCES:
patent: 3963015 (1976-06-01), Haubner et al.
patent: 4174697 (1979-11-01), Podrapsky et al.
patent: 4188929 (1980-02-01), Podrapsky et al.
patent: 4196711 (1980-04-01), Daumer
patent: 4207852 (1980-06-01), Ohki et al.
patent: 4342304 (1982-08-01), Watanabe
patent: 4385601 (1983-05-01), Orova et al.

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