What is the material of spark plugs?

[SerenityAnn]

Spark plug materials include nickel alloy, platinum, and iridium. Spark plugs are a crucial component of the ignition system in gasoline engines. They introduce high voltage into the combustion chamber and generate sparks by jumping across the electrode gap, thereby igniting the combustible air-fuel mixture in the cylinder. The main types of spark plugs are: Standard spark plugs, projected insulator spark plugs, electrode spark plugs, seat-type spark plugs, surface gap spark plugs, and surface discharge spark plugs. Working principle of spark plugs: The ground electrode of a spark plug is connected to the metal shell, which is threaded into the engine block via the cylinder head. The insulator primarily serves to isolate the metal shell from the central electrode. The terminal nut is the part of the spark plug that contacts the high-voltage coil. Current passes through the terminal nut and the central electrode, then ionizes the medium between the central electrode and the ground electrode to produce a spark, thereby igniting the air-fuel mixture in the cylinder.