Join Date: Mar 2016
location: Toronto, Canada
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How an Ignition Coil Works
Here's what's inside an ignition coil and how it works to increase the voltage to fire a spark on your car:
Here's a few photos of the ignition coil.
Starting with the coil, removed from my Toyota Corolla:
An ignition coil is located on top of an overhead cam engine. Its responsible for increasing voltage from the car's 12V to the thousands of volts needed to fire a spark in the combustion chamber:
When chopped open you can see the coil and other layers, along with the center iron core:
Here are all the components inside the ignition coil:
Here's a system diagram of how the ignition coil works electrically:
Note its the voltage spike caused by varying the electromagnetic field that fires the spark, and not just the step up transformer itself.
2007 Lexus GS350
2004 Toyota Camry
YouTube Automotive DIY Videos:
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