A car has four spark plugs. The following is the relevant introduction of spark plugs:
1, definition: Spark plug is an important component of the gasoline engine ignition system, it can introduce high voltage into the combustion chamber, and make it skip the electrode gap and generate sparks, thus igniting the combustible mixture in the cylinder.
2, composition: Spark plug is mainly composed of wiring nut, insulator, wiring screw, center electrode, side electrode and shell, side electrode welded on the shell. The spark plug is installed on the side or top of the engine. The early spark plug is connected with the distributor by the cylinder line. In the past ten years, the engine on the car has basically changed the ignition coil and the spark plug are directly connected.