The spark plug, also known as the mouth of the fire, is sparked by the discharge phenomenon between the electrodes. The gasoline engine is powered by the timely combustion of the fuel and the mixed gas. However, it is difficult to spontaneously burn even if it is in a high temperature environment. Want to make it timely burning it is necessary to use "fire" to ignite. Here the spark ignition is the "spark plug" role. The overall performance of the engine is entirely depends on the spark spark spark sparks or not to decide the good or bad. We tend to compare the engine to the heart of the car, but it is better to use the spark plug as the heart of a gasoline engine or part of a diesel engine.