Introduction To Spark Plug Structure

1. Steel shell: The lower part of the steel shell is a fine thread, which is used to assemble with the spark plug hole in the cylinder head. The upper part has an external hexagonal nut, which is used to install the spark plug sleeve to tighten or unscrew the spark plug.
2. The metal rod is the center electrode. The lower end of the metal rod is in contact with the upper end of the center electrode through the conductor glass body, and the upper end of the metal rod is equipped with a wiring nut.
3. There is a high alumina ceramic insulator between the steel shell and the center electrode to insulate the center electrode when electricity is energized.
4. The lowermost part of the steel shell is equipped with curved side electrodes.
5. There is a copper gasket in the middle of the outside of the steel shell.