What is a CDI charge?
In a CDI system, a charging circuit charges a high voltage capacitor, and at the instant of ignition, usually determined by a crank position sensor, the system stops charging the capacitor, allowing the capacitor to discharge its output to the ignition coil before reaching the spark plug.
What CDI means?
capacitor discharge ignition
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.
Can I use any CDI unit?
Because ignition characteristics (particularly timing) vary widely across vehicle models, there’s no one CDI box that can cover them all. The CDI must be matched to the engine that’s being worked on. The CDI boxes in these systems are not interchangeable.
How can you tell if a CDI box is bad?
The CDI is not easy to diagnose because the observable symptoms of a faulty CDI box can lead to different directions. Sometimes, a bad CDI does not cause sparks at all. Again, when a CDI box is about to go bad, it can lead to misfires, issues with starting, rough running or even stall the motor.
Is my CDI AC or DC?
Your CDI has two plugs, a 4-pin and a 2-pin. The 4-pin side may have 3 or 4 wires connected to it (both AC and DC versions). If the 2-pin connector has only 1 wire going to it, it’s a DC CDI. If there are 2 wires attached to the 2-pin connector, then it’s an AC CDI.
What is the function of CDI?
Essentially, a CDI box controls a motorcycle’s ignition system by starting the ignition and combustion process. A pulse of voltage from the motorcycle battery passes through the CDI box to fire up the spark plug.
Is a Kymco Agility 50 AC or DC?
The capacitor discharge ignition (CDI module) or ignitors used on KYMCO gas scooters are unique in that they are direct-current (DC) units, as opposed to the AC modules found on most other scooter brands. If you are a KYMCO owner you know how finding these parts can be a frustrating and often difficult process.
How do CDI units work?
Working Principle of a CDI System. A capacitor discharge ignition works by passing an electrical current over a capacitor. This type of ignition builds up a charge quickly. A CDI ignition starts by generating a charge and storing it up before sending it out to the spark plug in order to ignite the engine.