| VELOSTER(FS) >2013 > G 1.6 T-GDI > Engine Electrical System > Ignition System > Spark Plug>Description and Operation |
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A spark plug is a device
for delivering electric current from an ignition system to the combustion
chamber of a spark-ignition engine to ignite the compressed fuel/air
mixture therein by means of an electric spark, while containing combustion
pressure within the engine. A spark plug has a metal threaded shell,
electrically isolated from a central electrode by a porcelain
insulator.
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