1971 Kawaski CDI Capacitor Discharge Ignition - Vintage Motorcycle Ad

Description

1971 Kawaski CDI Capacitor Discharge Ignition - Vintage Motorcycle Ad
Original, vintage magazine advertisement
Size: Approx. 8" x 11" (21 cm x 28 cm)
Condition: Good
SPACE AGE, SOLID-STATE ELECTRONICS
HERE’S HOW IT WORKS
Capacitor Discharge means that a capacitor is charged
for a brief moment and when it discharges, the spark
plug fires. To charge the capacitor, battery (or magneto)
power Q is first stepped up to 400 volts by a dc-to-dc
converter o This voltage is then stored in capacitor
Q. The capacitor Q is controlled by a thyristor Q
which functions as an electronic switch. It has a built-in
gate that is opened by voltage pulses supplied by a
signal generator Q mounted on the generator rotor
shaft. The voltage pulses are the timing pulses. When
a voltage pulse opens the thyristor gate, the 400 volts
stored in the capacitor Q is applied to the primary
ignition coil The secondary ignition coil @ steps
up this voltage to 30,000 volts and fires the spark plug
0. The spark plug 0 has a built-in booster that steps
the voltage up even more.
The superior advantage of CDI is that it never needs
to be adjusted or timed — no moving parts to wear out —
and it greatly improves low-end pulling power without
sacrificing high rpm output. The result is a constant
ignition system that eliminates miss-fire and provides a
stronger power impulse with each rpm.
11907-7108-08