Ignition Circuit

The primary circuit of an engine consists of the battery, the ignition switch, a resistor, an Ignition module or contact points, and coil primary wiring. They are fitted so that the electricity flows continually through them. The primary circuit voltage is usually very low, it is about 12 volts. The wiring has a thin layer of insulation to save from short circuit.

The secondary system of circuitry is made of three basic components: ignition coil, the distributor, and the spark plug. This system is what is used for new formats like the distributor less ignition systems.

Ignition Coil
The ignition coil is made up of two separate cover of copper wire around a laminated iron core. A high-voltage current is produced in the secondary winding that has many turns of thin wire. This high-voltage current flows via the core portions of the distributor.

The major duty of the distributor is to allow the current pass from the coil to the correct spark plug at the right time. It has a rotor inside that passes close to the spark plugs.

Spark Plug
The spark plug has to create a high-voltage spark needed to ignite the fuel mixture in the combustion chamber.