What does an ignition coil do?

Answer

An ignition coil is a coil in a car's ignition system that carries the 6 or 12 volts from the battery to the many volts used to spark the spark plugs in the ignition. An ignition coil is also called a spark coil, and is classified as an induction coil. All induction coils are electronic transformers that transform low-voltage pulses from the DC supply into higher voltage currents needed to spark machine engines.

An induction coil is made from two insulated copper wires, called the primary and secondary winding, wrapped around an iron core. A magnetic field occurs when the electric current passes through the primary winding, and the energy is transferred to the secondary by way of the iron core. This has to happen repeatedly so that the coil is able to power the output terminals, so an interrupter bar is placed between the coil and iron core to open and close the electronic current flow. In order to make sure the ignition coil is working, one can safely remove a spark plug and place the threaded end of the spark plug to an exposed metallic piece of engine. The car should be cranked while the plug is held to the engine. A large spark appearing signifies properly functioning ignition coils.

Q&A Related to "What does an ignition coil do?"
1. Disconnect the positive terminal from the battery and set it aside. The ignition system delivers high voltage current, so you should always cut the power to it before doing any
http://www.ehow.com/how_5683089_change-ignition-co...
1. Turn the vehicle off and open the hood. As with most types of vehicular maintenance, you'll want to begin the test with the vehicle in park and with the engine off. Open the hood
http://www.wikihow.com/Test-an-Ignition-Coil
Believe it or not, there is a coil of wire inside. Actually, there are two coils of wire. One has hundreds of times more wraps than the other and they are wound around a steel armature
http://wiki.answers.com/Q/What_is_inside_a_ignitio...
1. Test other aspects of the ignition system first. Make sure the battery is properly connected with its cable clamps, test the battery voltage, and check the ignition coil wires
http://www.ehow.com/how_7351526_troubleshoot-coil-...
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The test for an ignition coil begins with disconnecting the coil output wire. Then a person will have to hook a spark plug to the output wire making sure that ...
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