ignition coil

American  

noun

1. (in an automotive ignition system) a transformer consisting of two wire windings or coils in which low-voltage direct current is fed through the primary winding to generate high-voltage spark pulses in the secondary winding.

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ignition coil British  

noun

1. an induction coil that supplies the high voltage to the sparking plugs of an internal-combustion engine

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Etymology

Origin of ignition coil

First recorded in 1895–1900

Example Sentences

If you have a bad spark plug and ignore it long enough, it will exacerbate the wear and tear on the ignition coil, and eventually they will need to be replaced in tandem.

From Seattle Times • Jul. 14, 2021

The ignition coil in an engine transforms the battery’s 12-volt charge into thousands of volts, which are needed to create an electric spark to ignite the fuel.

From Seattle Times • Jul. 14, 2021

Likely suspects include a dead electronic control module or ignition coil.

From Time Magazine Archive

The KX125 motor enjoys better lubrication through the left crankcase to the input shaft bearing, and it also has improved waterproofing around the ignition coil.

From Time Magazine Archive

In adjusting the vibrator of an ignition coil, the latter should not require over one-half ampere of current.

From Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications by Hawkins, Nehemiah