The spark plug is the core component of a gasoline engine's ignition system.
2025-11-10
Central electrode: Receives high-voltage electricity and forms a discharge gap with the side electrode.
Side electrode: Welded onto the housing, it works in conjunction with the center electrode to produce a spark.
Insulator: Made from high-alumina ceramic, ensuring that high-voltage electricity discharges only through the electrode gap, thereby preventing leakage.
Metal housing: Connected to the engine cylinder head via threading, it also serves a cooling function.
Wiring nut: Connects high-voltage wires and transmits current.
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