1. Induction: In this method, a coil (ignition coil) is used to generate a high-voltage spark. When the ignition switch is turned on, current flows through the coil's primary winding, creating a magnetic field. When the ignition switch is turned off, the magnetic field collapses and induces a high voltage in the secondary winding of the coil. This high voltage is then sent to the spark plug, creating a spark.
2. Capacitive Discharge (CDI): In a CDI system, a capacitor is charged to a high voltage. When the ignition switch is turned on, the capacitor is discharged through the primary winding of an ignition coil. This creates a high voltage in the secondary winding of the coil, which is then sent to the spark plug.
3. Transistorized Coil Ignition (TCI): TCI systems use a transistor to control the flow of current through the primary winding of an ignition coil. When the ignition switch is turned on, the transistor is turned on, allowing current to flow through the coil's primary winding. This creates a magnetic field. When the transistor is turned off, the magnetic field collapses and induces a high voltage in the secondary winding of the coil. This high voltage is then sent to the spark plug.
4. Magneto Ignition: Magneto ignition systems are commonly used in older vehicles and small engines. In a magneto system, a permanent magnet rotates past a coil, generating an alternating current (AC) in the coil. This AC current is then rectified and sent to the spark plug.
These are some of the common methods used to trigger a spark in electronic ignition systems. The specific method used may vary depending on the vehicle or engine.
