1. Primary Circuit:
The coil pack consists of a primary and secondary circuit. The primary circuit is connected to the vehicle's battery and receives a low-voltage electrical current from it.
2. Primary Coil:
Within the coil pack, the primary circuit includes a primary coil, which is made of several turns of copper wire. When an electrical current flows through this primary coil, it creates a magnetic field.
3. Secondary Circuit:
The coil pack also includes a secondary circuit, which consists of a secondary coil made of many more turns of even thinner copper wire compared to the primary coil.
4. Magnetic Field Generation:
As electrical current passes through the primary coil, it generates a strong electromagnetic field around the coil. This changing magnetic field creates an induction effect.
5. Induction:
The rapidly changing magnetic field generated by the primary coil induces a high-voltage electrical current in the secondary coil due to electromagnetic induction. This current has a much higher voltage compared to the low voltage supplied by the battery.
6. Output:
The secondary coil's high-voltage electrical current is directed to the spark plugs through high-tension wires (spark plug wires) or directly through the coil-on-plug (COP) design, where the coil pack is mounted directly onto the spark plugs.
7. Spark Generation:
The spark plugs utilize the high-voltage electricity from the coil pack to create a spark across the spark plug gap. This spark ignites the compressed fuel-air mixture within the cylinder, initiating the combustion process that powers the engine.
In summary, the coil pack is responsible for converting the low-voltage electrical current from the battery into high-voltage pulses necessary to create sparks for ignition in gasoline engines. Without properly functioning coil packs, the engine will not be able to operate as intended.
