Where does the CDI signal come from on a motorcycle?
Yes, correct, the original CDI is both charged (North pole magnet passing I believe) and triggered (South pole magnet) by an AC single coil excited by the flywheel. Your problem is that the 400V AC signal is no longer available so you intend to derive an accurate trigger signal from the engine fly wheel.
What is a capacitor discharge ignition ( CDI ) module?
Capacitor Discharge Ignition Module The typical CDI module includes different circuits like charging & triggering, a mini transformer & the main capacitor. The system voltage can be increased from 250V to 600V through a power supply in this module.
What happens when you turn off the CDI on a motor?
When we want to shut down the motor engine, we have two switches the key switch or the kill switch. The switches ground out the charging circuit so the entire charging pulse is sent to the ground. Since the CDI can no longer charge, it will cease to provide the spark and the engine will slow to a stop.
Where does the DC current from an ignition coil come from?
A strong DC current pulse can be generated by a coil below the flywheel because the flywheel magnet goes over it. These DC current supplies throughout a wire toward an ignition coil placed at the external of the engine.
Where does the voltage for a CDI come from?
The input to the CDI unit is derived from two sources of the alternator. One source is a low voltage around 12 volts while the other input is taken from the relatively high voltage tap of the alternator, generating around a 100 volts.
How does a CDI circuit work in a spark plug?
The CDI circuit converts this 200V into bursts of high current for feeding the input winding of the ignition coil. These rapid high current bursts are further amplified to many thousands of volts by the ignition coil and finally fed to the connected spark plug for the required arcing and the initiating the ignition of the vehicle.
Which is the ground terminal on a fuse box starter relay?
The “S” terminal (or 85 terminal in some relays) receives a 12-volt signal from the car’s battery. A small current, usually less than 10 amperes, passes down the terminal and through the coil windings and through to ground. In the fender-mounted relays, this is the “I” terminal. In fuse box starter relays, the ground is terminal 86.
What causes the core of a starter relay to move?
A current flows throw the coil winding and produces an electromagnetic field. In a starter relay, the magnetism moves an armature or plunger to close a circuit. In a starter solenoid, the magnetic force created by current flowing through the coil causes the core to move out.