How does shorting a CDI ignition system work?
Shorting either one to ground will disable the ignition and stop the engine,in the first case the storage cap does not get charged,in the second it does not get discharged.
What does CDI stand for in ignition circuit?
What is CDI? CDI stands for capacitor discharge ignition (alternatively, “capacitive.”) If you’re new to capacitors, they’re similar to batteries in that they can store energy for later. What sets them apart is their ability to release all that energy near instantaneously, which is ideal for an ignition circuit. Here’s a CDI box in a dirt bike.
What does the trigger on a CDI box do?
The trigger tells the box to fire, the box determines when to fire which coil with the capacitors, and zap goes the spark plug, ad infinitum. In addition to dischargin’ those capacitors, the box may also influence your rev limit, timing advance, and other variables related to spark, but that’s it.
Where is the secondary winding resistance on a CDI box?
Touch one of the outer contact leads and central, inner contact of the ignition coil. This is where the main wire connects to the distributor. Record the reading. This is termed as the secondary winding resistance of the ignition coil.
The trigger tells the box to fire, the box determines when to fire which coil with the capacitors, and zap goes the spark plug, ad infinitum. In addition to dischargin’ those capacitors, the box may also influence your rev limit, timing advance, and other variables related to spark, but that’s it.
Shorting either one to ground will disable the ignition and stop the engine,in the first case the storage cap does not get charged,in the second it does not get discharged.
How does the ignition coil work in a CDI?
In a CDI ignition system,a storage capacitor is charged to a high voltage (a few hundred volts) by the flywheel charging coil and, at the proper moment quickly discharged into the primary winding of the ignition coil,which is actually a stepup pulse-transformer. The secondary output is a short very high amplitude pulse which fires the spark plug.
Touch one of the outer contact leads and central, inner contact of the ignition coil. This is where the main wire connects to the distributor. Record the reading. This is termed as the secondary winding resistance of the ignition coil.