What is the self-cleaning temperature of a spark plug?

[DeSarah]

The self-cleaning temperature of a spark plug is 450 degrees Celsius, and the optimal working temperature range is 500-600 degrees Celsius. A spark plug mainly consists of a terminal nut, insulator, terminal stud, center electrode, side electrode, and metal shell. The main types of spark plugs include: standard spark plugs, projected insulator spark plugs, electrode-type spark plugs, seat-type spark plugs, surface-gap spark plugs, and surface-discharge spark plugs. Working principle of spark plugs: The ground electrode of the spark plug connects 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 center electrode. The terminal nut is the part that contacts the high-voltage coil. When current passes through the terminal nut and center electrode, it ionizes the medium between the center electrode and ground electrode to generate a spark, thereby igniting the air-fuel mixture in the cylinder.