What is the working principle of spark plugs?

[SanGia]

The working principle of a spark plug is that the electrode of the spark plug generates repeated and continuous ignition pulses. The high-voltage pulse electricity breaks down the air between the two electrodes of the spark plug, creating a spark and generating an explosion to ignite the mixed gas in the cylinder, which then causes the engine to start running. Spark plugs are consumable items and need to be replaced regularly. The choice of spark plugs directly affects engine operation. When replacing spark plugs, many people only focus on the material and the number of electrodes, but in fact, the heat value of the spark plug is also very important. Choosing spark plugs with different heat values can easily affect engine output, and it is even possible for the spark plug to be directly damaged.